drm/i915: Move most cdclk/rawclk related code to intel_cdclk.c

Let's try to shrink intel_display.c a bit by moving the cdclk/rawclk
stuff to a new file. It's all reasonably self contained so we don't
even have to add that many non-static symbols.

We'll also take the opportunity to shuffle around the functions a bit
to get things in a more consistent order based on the platform.

v2: Add kernel-docs (Ander)
v3: Deal with IS_GEN9_BC()
v4: Deal with i945gm_get_cdclk()
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207183305.19656-1-ville.syrjala@linux.intel.com

Documentation/gpu/i915.rst

@@ -213,6 +213,15 @@ Video BIOS Table (VBT)
 .. kernel-doc:: drivers/gpu/drm/i915/intel_vbt_defs.h
    :internal:
 
+Display clocks
+--------------
+
+.. kernel-doc:: drivers/gpu/drm/i915/intel_cdclk.c
+   :doc: CDCLK / RAWCLK
+
+.. kernel-doc:: drivers/gpu/drm/i915/intel_cdclk.c
+   :internal:
+
 Display PLLs
 ------------
 

drivers/gpu/drm/i915/Makefile

@@ -72,6 +72,7 @@ i915-y += intel_audio.o \
 	  intel_atomic.o \
 	  intel_atomic_plane.o \
 	  intel_bios.o \
+	  intel_cdclk.o \
 	  intel_color.o \
 	  intel_display.o \
 	  intel_dpio_phy.o \

drivers/gpu/drm/i915/intel_cdclk.c

+/*
+ * Copyright © 2006-2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "intel_drv.h"
+
+/**
+ * DOC: CDCLK / RAWCLK
+ *
+ * The display engine uses several different clocks to do its work. There
+ * are two main clocks involved that aren't directly related to the actual
+ * pixel clock or any symbol/bit clock of the actual output port. These
+ * are the core display clock (CDCLK) and RAWCLK.
+ *
+ * CDCLK clocks most of the display pipe logic, and thus its frequency
+ * must be high enough to support the rate at which pixels are flowing
+ * through the pipes. Downscaling must also be accounted as that increases
+ * the effective pixel rate.
+ *
+ * On several platforms the CDCLK frequency can be changed dynamically
+ * to minimize power consumption for a given display configuration.
+ * Typically changes to the CDCLK frequency require all the display pipes
+ * to be shut down while the frequency is being changed.
+ *
+ * On SKL+ the DMC will toggle the CDCLK off/on during DC5/6 entry/exit.
+ * DMC will not change the active CDCLK frequency however, so that part
+ * will still be performed by the driver directly.
+ *
+ * RAWCLK is a fixed frequency clock, often used by various auxiliary
+ * blocks such as AUX CH or backlight PWM. Hence the only thing we
+ * really need to know about RAWCLK is its frequency so that various
+ * dividers can be programmed correctly.
+ */
+
+static int fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return 133333;
+}
+
+static int fixed_200mhz_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return 200000;
+}
+
+static int fixed_266mhz_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return 266667;
+}
+
+static int fixed_333mhz_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return 333333;
+}
+
+static int fixed_400mhz_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return 400000;
+}
+
+static int fixed_450mhz_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return 450000;
+}
+
+static int i85x_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 hpllcc = 0;
+
+	/*
+	 * 852GM/852GMV only supports 133 MHz and the HPLLCC
+	 * encoding is different :(
+	 * FIXME is this the right way to detect 852GM/852GMV?
+	 */
+	if (pdev->revision == 0x1)
+		return 133333;
+
+	pci_bus_read_config_word(pdev->bus,
+				 PCI_DEVFN(0, 3), HPLLCC, &hpllcc);
+
+	/* Assume that the hardware is in the high speed state.  This
+	 * should be the default.
+	 */
+	switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
+	case GC_CLOCK_133_200:
+	case GC_CLOCK_133_200_2:
+	case GC_CLOCK_100_200:
+		return 200000;
+	case GC_CLOCK_166_250:
+		return 250000;
+	case GC_CLOCK_100_133:
+		return 133333;
+	case GC_CLOCK_133_266:
+	case GC_CLOCK_133_266_2:
+	case GC_CLOCK_166_266:
+		return 266667;
+	}
+
+	/* Shouldn't happen */
+	return 0;
+}
+
+static int i915gm_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 gcfgc = 0;
+
+	pci_read_config_word(pdev, GCFGC, &gcfgc);
+
+	if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
+		return 133333;
+
+	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+	case GC_DISPLAY_CLOCK_333_320_MHZ:
+		return 333333;
+	default:
+	case GC_DISPLAY_CLOCK_190_200_MHZ:
+		return 190000;
+	}
+}
+
+static int i945gm_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 gcfgc = 0;
+
+	pci_read_config_word(pdev, GCFGC, &gcfgc);
+
+	if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
+		return 133333;
+
+	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+	case GC_DISPLAY_CLOCK_333_320_MHZ:
+		return 320000;
+	default:
+	case GC_DISPLAY_CLOCK_190_200_MHZ:
+		return 200000;
+	}
+}
+
+static unsigned int intel_hpll_vco(struct drm_i915_private *dev_priv)
+{
+	static const unsigned int blb_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 4800000,
+		[4] = 6400000,
+	};
+	static const unsigned int pnv_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 4800000,
+		[4] = 2666667,
+	};
+	static const unsigned int cl_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 6400000,
+		[4] = 3333333,
+		[5] = 3566667,
+		[6] = 4266667,
+	};
+	static const unsigned int elk_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 4800000,
+	};
+	static const unsigned int ctg_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 6400000,
+		[4] = 2666667,
+		[5] = 4266667,
+	};
+	const unsigned int *vco_table;
+	unsigned int vco;
+	uint8_t tmp = 0;
+
+	/* FIXME other chipsets? */
+	if (IS_GM45(dev_priv))
+		vco_table = ctg_vco;
+	else if (IS_G4X(dev_priv))
+		vco_table = elk_vco;
+	else if (IS_I965GM(dev_priv))
+		vco_table = cl_vco;
+	else if (IS_PINEVIEW(dev_priv))
+		vco_table = pnv_vco;
+	else if (IS_G33(dev_priv))
+		vco_table = blb_vco;
+	else
+		return 0;
+
+	tmp = I915_READ(IS_MOBILE(dev_priv) ? HPLLVCO_MOBILE : HPLLVCO);
+
+	vco = vco_table[tmp & 0x7];
+	if (vco == 0)
+		DRM_ERROR("Bad HPLL VCO (HPLLVCO=0x%02x)\n", tmp);
+	else
+		DRM_DEBUG_KMS("HPLL VCO %u kHz\n", vco);
+
+	return vco;
+}
+
+static int g33_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	static const uint8_t div_3200[] = { 12, 10,  8,  7, 5, 16 };
+	static const uint8_t div_4000[] = { 14, 12, 10,  8, 6, 20 };
+	static const uint8_t div_4800[] = { 20, 14, 12, 10, 8, 24 };
+	static const uint8_t div_5333[] = { 20, 16, 12, 12, 8, 28 };
+	const uint8_t *div_table;
+	unsigned int cdclk_sel, vco = intel_hpll_vco(dev_priv);
+	uint16_t tmp = 0;
+
+	pci_read_config_word(pdev, GCFGC, &tmp);
+
+	cdclk_sel = (tmp >> 4) & 0x7;
+
+	if (cdclk_sel >= ARRAY_SIZE(div_3200))
+		goto fail;
+
+	switch (vco) {
+	case 3200000:
+		div_table = div_3200;
+		break;
+	case 4000000:
+		div_table = div_4000;
+		break;
+	case 4800000:
+		div_table = div_4800;
+		break;
+	case 5333333:
+		div_table = div_5333;
+		break;
+	default:
+		goto fail;
+	}
+
+	return DIV_ROUND_CLOSEST(vco, div_table[cdclk_sel]);
+
+fail:
+	DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n",
+		  vco, tmp);
+	return 190476;
+}
+
+static int pnv_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 gcfgc = 0;
+
+	pci_read_config_word(pdev, GCFGC, &gcfgc);
+
+	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+	case GC_DISPLAY_CLOCK_267_MHZ_PNV:
+		return 266667;
+	case GC_DISPLAY_CLOCK_333_MHZ_PNV:
+		return 333333;
+	case GC_DISPLAY_CLOCK_444_MHZ_PNV:
+		return 444444;
+	case GC_DISPLAY_CLOCK_200_MHZ_PNV:
+		return 200000;
+	default:
+		DRM_ERROR("Unknown pnv display core clock 0x%04x\n", gcfgc);
+	case GC_DISPLAY_CLOCK_133_MHZ_PNV:
+		return 133333;
+	case GC_DISPLAY_CLOCK_167_MHZ_PNV:
+		return 166667;
+	}
+}
+
+static int i965gm_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	static const uint8_t div_3200[] = { 16, 10,  8 };
+	static const uint8_t div_4000[] = { 20, 12, 10 };
+	static const uint8_t div_5333[] = { 24, 16, 14 };
+	const uint8_t *div_table;
+	unsigned int cdclk_sel, vco = intel_hpll_vco(dev_priv);
+	uint16_t tmp = 0;
+
+	pci_read_config_word(pdev, GCFGC, &tmp);
+
+	cdclk_sel = ((tmp >> 8) & 0x1f) - 1;
+
+	if (cdclk_sel >= ARRAY_SIZE(div_3200))
+		goto fail;
+
+	switch (vco) {
+	case 3200000:
+		div_table = div_3200;
+		break;
+	case 4000000:
+		div_table = div_4000;
+		break;
+	case 5333333:
+		div_table = div_5333;
+		break;
+	default:
+		goto fail;
+	}
+
+	return DIV_ROUND_CLOSEST(vco, div_table[cdclk_sel]);
+
+fail:
+	DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n",
+		  vco, tmp);
+	return 200000;
+}
+
+static int gm45_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	unsigned int cdclk_sel, vco = intel_hpll_vco(dev_priv);
+	uint16_t tmp = 0;
+
+	pci_read_config_word(pdev, GCFGC, &tmp);
+
+	cdclk_sel = (tmp >> 12) & 0x1;
+
+	switch (vco) {
+	case 2666667:
+	case 4000000:
+	case 5333333:
+		return cdclk_sel ? 333333 : 222222;
+	case 3200000:
+		return cdclk_sel ? 320000 : 228571;
+	default:
+		DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n",
+			  vco, tmp);
+		return 222222;
+	}
+}
+
+static int hsw_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	uint32_t lcpll = I915_READ(LCPLL_CTL);
+	uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK;
+
+	if (lcpll & LCPLL_CD_SOURCE_FCLK)
+		return 800000;
+	else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+		return 450000;
+	else if (freq == LCPLL_CLK_FREQ_450)
+		return 450000;
+	else if (IS_HSW_ULT(dev_priv))
+		return 337500;
+	else
+		return 540000;
+}
+
+static int vlv_calc_cdclk(struct drm_i915_private *dev_priv,
+			  int max_pixclk)
+{
+	int freq_320 = (dev_priv->hpll_freq <<  1) % 320000 != 0 ?
+		333333 : 320000;
+	int limit = IS_CHERRYVIEW(dev_priv) ? 95 : 90;
+
+	/*
+	 * We seem to get an unstable or solid color picture at 200MHz.
+	 * Not sure what's wrong. For now use 200MHz only when all pipes
+	 * are off.
+	 */
+	if (!IS_CHERRYVIEW(dev_priv) &&
+	    max_pixclk > freq_320*limit/100)
+		return 400000;
+	else if (max_pixclk > 266667*limit/100)
+		return freq_320;
+	else if (max_pixclk > 0)
+		return 266667;
+	else
+		return 200000;
+}
+
+static int vlv_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	return vlv_get_cck_clock_hpll(dev_priv, "cdclk",
+				      CCK_DISPLAY_CLOCK_CONTROL);
+}
+
+static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv)
+{
+	unsigned int credits, default_credits;
+
+	if (IS_CHERRYVIEW(dev_priv))
+		default_credits = PFI_CREDIT(12);
+	else
+		default_credits = PFI_CREDIT(8);
+
+	if (dev_priv->cdclk_freq >= dev_priv->czclk_freq) {
+		/* CHV suggested value is 31 or 63 */
+		if (IS_CHERRYVIEW(dev_priv))
+			credits = PFI_CREDIT_63;
+		else
+			credits = PFI_CREDIT(15);
+	} else {
+		credits = default_credits;
+	}
+
+	/*
+	 * WA - write default credits before re-programming
+	 * FIXME: should we also set the resend bit here?
+	 */
+	I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE |
+		   default_credits);
+
+	I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE |
+		   credits | PFI_CREDIT_RESEND);
+
+	/*
+	 * FIXME is this guaranteed to clear
+	 * immediately or should we poll for it?
+	 */
+	WARN_ON(I915_READ(GCI_CONTROL) & PFI_CREDIT_RESEND);
+}
+
+static void vlv_set_cdclk(struct drm_device *dev, int cdclk)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 val, cmd;
+
+	WARN_ON(dev_priv->display.get_cdclk(dev_priv) != dev_priv->cdclk_freq);
+
+	if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */
+		cmd = 2;
+	else if (cdclk == 266667)
+		cmd = 1;
+	else
+		cmd = 0;
+
+	mutex_lock(&dev_priv->rps.hw_lock);
+	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
+	val &= ~DSPFREQGUAR_MASK;
+	val |= (cmd << DSPFREQGUAR_SHIFT);
+	vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
+	if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) &
+		      DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT),
+		     50)) {
+		DRM_ERROR("timed out waiting for CDclk change\n");
+	}
+	mutex_unlock(&dev_priv->rps.hw_lock);
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	if (cdclk == 400000) {
+		u32 divider;
+
+		divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1,
+					    cdclk) - 1;
+
+		/* adjust cdclk divider */
+		val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL);
+		val &= ~CCK_FREQUENCY_VALUES;
+		val |= divider;
+		vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val);
+
+		if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) &
+			      CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT),
+			     50))
+			DRM_ERROR("timed out waiting for CDclk change\n");
+	}
+
+	/* adjust self-refresh exit latency value */
+	val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC);
+	val &= ~0x7f;
+
+	/*
+	 * For high bandwidth configs, we set a higher latency in the bunit
+	 * so that the core display fetch happens in time to avoid underruns.
+	 */
+	if (cdclk == 400000)
+		val |= 4500 / 250; /* 4.5 usec */
+	else
+		val |= 3000 / 250; /* 3.0 usec */
+	vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val);
+
+	mutex_unlock(&dev_priv->sb_lock);
+
+	intel_update_cdclk(dev_priv);
+}
+
+static void chv_set_cdclk(struct drm_device *dev, int cdclk)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 val, cmd;
+
+	WARN_ON(dev_priv->display.get_cdclk(dev_priv) != dev_priv->cdclk_freq);
+
+	switch (cdclk) {
+	case 333333:
+	case 320000:
+	case 266667:
+	case 200000:
+		break;
+	default:
+		MISSING_CASE(cdclk);
+		return;
+	}
+
+	/*
+	 * Specs are full of misinformation, but testing on actual
+	 * hardware has shown that we just need to write the desired
+	 * CCK divider into the Punit register.
+	 */
+	cmd = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1;
+
+	mutex_lock(&dev_priv->rps.hw_lock);
+	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
+	val &= ~DSPFREQGUAR_MASK_CHV;
+	val |= (cmd << DSPFREQGUAR_SHIFT_CHV);
+	vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
+	if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) &
+		      DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV),
+		     50)) {
+		DRM_ERROR("timed out waiting for CDclk change\n");
+	}
+	mutex_unlock(&dev_priv->rps.hw_lock);
+
+	intel_update_cdclk(dev_priv);
+}
+
+static int bdw_calc_cdclk(int max_pixclk)
+{
+	if (max_pixclk > 540000)
+		return 675000;
+	else if (max_pixclk > 450000)
+		return 540000;
+	else if (max_pixclk > 337500)
+		return 450000;
+	else
+		return 337500;
+}
+
+static int bdw_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	uint32_t lcpll = I915_READ(LCPLL_CTL);
+	uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK;
+
+	if (lcpll & LCPLL_CD_SOURCE_FCLK)
+		return 800000;
+	else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+		return 450000;
+	else if (freq == LCPLL_CLK_FREQ_450)
+		return 450000;
+	else if (freq == LCPLL_CLK_FREQ_54O_BDW)
+		return 540000;
+	else if (freq == LCPLL_CLK_FREQ_337_5_BDW)
+		return 337500;
+	else
+		return 675000;
+}
+
+static void bdw_set_cdclk(struct drm_device *dev, int cdclk)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	uint32_t val, data;
+	int ret;
+
+	if (WARN((I915_READ(LCPLL_CTL) &
+		  (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK |
+		   LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE |
+		   LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW |
+		   LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK,
+		 "trying to change cdclk frequency with cdclk not enabled\n"))
+		return;
+
+	mutex_lock(&dev_priv->rps.hw_lock);
+	ret = sandybridge_pcode_write(dev_priv,
+				      BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0);
+	mutex_unlock(&dev_priv->rps.hw_lock);
+	if (ret) {
+		DRM_ERROR("failed to inform pcode about cdclk change\n");
+		return;
+	}
+
+	val = I915_READ(LCPLL_CTL);
+	val |= LCPLL_CD_SOURCE_FCLK;
+	I915_WRITE(LCPLL_CTL, val);
+
+	if (wait_for_us(I915_READ(LCPLL_CTL) &
+			LCPLL_CD_SOURCE_FCLK_DONE, 1))
+		DRM_ERROR("Switching to FCLK failed\n");
+
+	val = I915_READ(LCPLL_CTL);
+	val &= ~LCPLL_CLK_FREQ_MASK;
+
+	switch (cdclk) {
+	case 450000:
+		val |= LCPLL_CLK_FREQ_450;
+		data = 0;
+		break;
+	case 540000:
+		val |= LCPLL_CLK_FREQ_54O_BDW;
+		data = 1;
+		break;
+	case 337500:
+		val |= LCPLL_CLK_FREQ_337_5_BDW;
+		data = 2;
+		break;
+	case 675000:
+		val |= LCPLL_CLK_FREQ_675_BDW;
+		data = 3;
+		break;
+	default:
+		WARN(1, "invalid cdclk frequency\n");
+		return;
+	}
+
+	I915_WRITE(LCPLL_CTL, val);
+
+	val = I915_READ(LCPLL_CTL);
+	val &= ~LCPLL_CD_SOURCE_FCLK;
+	I915_WRITE(LCPLL_CTL, val);
+
+	if (wait_for_us((I915_READ(LCPLL_CTL) &
+			LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
+		DRM_ERROR("Switching back to LCPLL failed\n");
+
+	mutex_lock(&dev_priv->rps.hw_lock);
+	sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, data);
+	mutex_unlock(&dev_priv->rps.hw_lock);
+
+	I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1);
+
+	intel_update_cdclk(dev_priv);
+
+	WARN(cdclk != dev_priv->cdclk_freq,
+	     "cdclk requested %d kHz but got %d kHz\n",
+	     cdclk, dev_priv->cdclk_freq);
+}
+
+static int skl_calc_cdclk(int max_pixclk, int vco)
+{
+	if (vco == 8640000) {
+		if (max_pixclk > 540000)
+			return 617143;
+		else if (max_pixclk > 432000)
+			return 540000;
+		else if (max_pixclk > 308571)
+			return 432000;
+		else
+			return 308571;
+	} else {
+		if (max_pixclk > 540000)
+			return 675000;
+		else if (max_pixclk > 450000)
+			return 540000;
+		else if (max_pixclk > 337500)
+			return 450000;
+		else
+			return 337500;
+	}
+}
+
+static void skl_dpll0_update(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	dev_priv->cdclk_pll.ref = 24000;
+	dev_priv->cdclk_pll.vco = 0;
+
+	val = I915_READ(LCPLL1_CTL);
+	if ((val & LCPLL_PLL_ENABLE) == 0)
+		return;
+
+	if (WARN_ON((val & LCPLL_PLL_LOCK) == 0))
+		return;
+
+	val = I915_READ(DPLL_CTRL1);
+
+	if (WARN_ON((val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) |
+			    DPLL_CTRL1_SSC(SKL_DPLL0) |
+			    DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) !=
+		    DPLL_CTRL1_OVERRIDE(SKL_DPLL0)))
+		return;
+
+	switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) {
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0):
+		dev_priv->cdclk_pll.vco = 8100000;
+		break;
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0):
+		dev_priv->cdclk_pll.vco = 8640000;
+		break;
+	default:
+		MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0));
+		break;
+	}
+}
+
+static int skl_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 cdctl;
+
+	skl_dpll0_update(dev_priv);
+
+	if (dev_priv->cdclk_pll.vco == 0)
+		return dev_priv->cdclk_pll.ref;
+
+	cdctl = I915_READ(CDCLK_CTL);
+
+	if (dev_priv->cdclk_pll.vco == 8640000) {
+		switch (cdctl & CDCLK_FREQ_SEL_MASK) {
+		case CDCLK_FREQ_450_432:
+			return 432000;
+		case CDCLK_FREQ_337_308:
+			return 308571;
+		case CDCLK_FREQ_540:
+			return 540000;
+		case CDCLK_FREQ_675_617:
+			return 617143;
+		default:
+			MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK);
+		}
+	} else {
+		switch (cdctl & CDCLK_FREQ_SEL_MASK) {
+		case CDCLK_FREQ_450_432:
+			return 450000;
+		case CDCLK_FREQ_337_308:
+			return 337500;
+		case CDCLK_FREQ_540:
+			return 540000;
+		case CDCLK_FREQ_675_617:
+			return 675000;
+		default:
+			MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK);
+		}
+	}
+
+	return dev_priv->cdclk_pll.ref;
+}
+
+/* convert from kHz to .1 fixpoint MHz with -1MHz offset */
+static int skl_cdclk_decimal(int cdclk)
+{
+	return DIV_ROUND_CLOSEST(cdclk - 1000, 500);
+}
+
+static void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv,
+					int vco)
+{
+	bool changed = dev_priv->skl_preferred_vco_freq != vco;
+
+	dev_priv->skl_preferred_vco_freq = vco;
+
+	if (changed)
+		intel_update_max_cdclk(dev_priv);
+}
+
+static void skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco)
+{
+	int min_cdclk = skl_calc_cdclk(0, vco);
+	u32 val;
+
+	WARN_ON(vco != 8100000 && vco != 8640000);
+
+	/* select the minimum CDCLK before enabling DPLL 0 */
+	val = CDCLK_FREQ_337_308 | skl_cdclk_decimal(min_cdclk);
+	I915_WRITE(CDCLK_CTL, val);
+	POSTING_READ(CDCLK_CTL);
+
+	/*
+	 * We always enable DPLL0 with the lowest link rate possible, but still
+	 * taking into account the VCO required to operate the eDP panel at the
+	 * desired frequency. The usual DP link rates operate with a VCO of
+	 * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640.
+	 * The modeset code is responsible for the selection of the exact link
+	 * rate later on, with the constraint of choosing a frequency that
+	 * works with vco.
+	 */
+	val = I915_READ(DPLL_CTRL1);
+
+	val &= ~(DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | DPLL_CTRL1_SSC(SKL_DPLL0) |
+		 DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0));
+	val |= DPLL_CTRL1_OVERRIDE(SKL_DPLL0);
+	if (vco == 8640000)
+		val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080,
+					    SKL_DPLL0);
+	else
+		val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810,
+					    SKL_DPLL0);
+
+	I915_WRITE(DPLL_CTRL1, val);
+	POSTING_READ(DPLL_CTRL1);
+
+	I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) | LCPLL_PLL_ENABLE);
+
+	if (intel_wait_for_register(dev_priv,
+				    LCPLL1_CTL, LCPLL_PLL_LOCK, LCPLL_PLL_LOCK,
+				    5))
+		DRM_ERROR("DPLL0 not locked\n");
+
+	dev_priv->cdclk_pll.vco = vco;
+
+	/* We'll want to keep using the current vco from now on. */
+	skl_set_preferred_cdclk_vco(dev_priv, vco);
+}
+
+static void skl_dpll0_disable(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) & ~LCPLL_PLL_ENABLE);
+	if (intel_wait_for_register(dev_priv,
+				   LCPLL1_CTL, LCPLL_PLL_LOCK, 0,
+				   1))
+		DRM_ERROR("Couldn't disable DPLL0\n");
+
+	dev_priv->cdclk_pll.vco = 0;
+}
+
+static void skl_set_cdclk(struct drm_i915_private *dev_priv,
+			  int cdclk, int vco)
+{
+	u32 freq_select, pcu_ack;
+	int ret;
+
+	WARN_ON((cdclk == 24000) != (vco == 0));
+
+	DRM_DEBUG_DRIVER("Changing CDCLK to %d kHz (VCO %d kHz)\n",
+			 cdclk, vco);
+
+	mutex_lock(&dev_priv->rps.hw_lock);
+	ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				SKL_CDCLK_PREPARE_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE, 3);
+	mutex_unlock(&dev_priv->rps.hw_lock);
+	if (ret) {
+		DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
+			  ret);
+		return;
+	}
+
+	/* set CDCLK_CTL */
+	switch (cdclk) {
+	case 450000:
+	case 432000:
+		freq_select = CDCLK_FREQ_450_432;
+		pcu_ack = 1;
+		break;
+	case 540000:
+		freq_select = CDCLK_FREQ_540;
+		pcu_ack = 2;
+		break;
+	case 308571:
+	case 337500:
+	default:
+		freq_select = CDCLK_FREQ_337_308;
+		pcu_ack = 0;
+		break;
+	case 617143:
+	case 675000:
+		freq_select = CDCLK_FREQ_675_617;
+		pcu_ack = 3;
+		break;
+	}
+
+	if (dev_priv->cdclk_pll.vco != 0 &&
+	    dev_priv->cdclk_pll.vco != vco)
+		skl_dpll0_disable(dev_priv);
+
+	if (dev_priv->cdclk_pll.vco != vco)
+		skl_dpll0_enable(dev_priv, vco);
+
+	I915_WRITE(CDCLK_CTL, freq_select | skl_cdclk_decimal(cdclk));
+	POSTING_READ(CDCLK_CTL);
+
+	/* inform PCU of the change */
+	mutex_lock(&dev_priv->rps.hw_lock);
+	sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, pcu_ack);
+	mutex_unlock(&dev_priv->rps.hw_lock);
+
+	intel_update_cdclk(dev_priv);
+}
+
+static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv)
+{
+	uint32_t cdctl, expected;
+
+	/*
+	 * check if the pre-os initialized the display
+	 * There is SWF18 scratchpad register defined which is set by the
+	 * pre-os which can be used by the OS drivers to check the status
+	 */
+	if ((I915_READ(SWF_ILK(0x18)) & 0x00FFFFFF) == 0)
+		goto sanitize;
+
+	intel_update_cdclk(dev_priv);
+	/* Is PLL enabled and locked ? */
+	if (dev_priv->cdclk_pll.vco == 0 ||
+	    dev_priv->cdclk_freq == dev_priv->cdclk_pll.ref)
+		goto sanitize;
+
+	/* DPLL okay; verify the cdclock
+	 *
+	 * Noticed in some instances that the freq selection is correct but
+	 * decimal part is programmed wrong from BIOS where pre-os does not
+	 * enable display. Verify the same as well.
+	 */
+	cdctl = I915_READ(CDCLK_CTL);
+	expected = (cdctl & CDCLK_FREQ_SEL_MASK) |
+		skl_cdclk_decimal(dev_priv->cdclk_freq);
+	if (cdctl == expected)
+		/* All well; nothing to sanitize */
+		return;
+
+sanitize:
+	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+
+	/* force cdclk programming */
+	dev_priv->cdclk_freq = 0;
+	/* force full PLL disable + enable */
+	dev_priv->cdclk_pll.vco = -1;
+}
+
+/**
+ * skl_init_cdclk - Initialize CDCLK on SKL
+ * @dev_priv: i915 device
+ *
+ * Initialize CDCLK for SKL and derivatives. This is generally
+ * done only during the display core initialization sequence,
+ * after which the DMC will take care of turning CDCLK off/on
+ * as needed.
+ */
+void skl_init_cdclk(struct drm_i915_private *dev_priv)
+{
+	int cdclk, vco;
+
+	skl_sanitize_cdclk(dev_priv);
+
+	if (dev_priv->cdclk_freq != 0 && dev_priv->cdclk_pll.vco != 0) {
+		/*
+		 * Use the current vco as our initial
+		 * guess as to what the preferred vco is.
+		 */
+		if (dev_priv->skl_preferred_vco_freq == 0)
+			skl_set_preferred_cdclk_vco(dev_priv,
+						    dev_priv->cdclk_pll.vco);
+		return;
+	}
+
+	vco = dev_priv->skl_preferred_vco_freq;
+	if (vco == 0)
+		vco = 8100000;
+	cdclk = skl_calc_cdclk(0, vco);
+
+	skl_set_cdclk(dev_priv, cdclk, vco);
+}
+
+/**
+ * skl_uninit_cdclk - Uninitialize CDCLK on SKL
+ * @dev_priv: i915 device
+ *
+ * Uninitialize CDCLK for SKL and derivatives. This is done only
+ * during the display core uninitialization sequence.
+ */
+void skl_uninit_cdclk(struct drm_i915_private *dev_priv)
+{
+	skl_set_cdclk(dev_priv, dev_priv->cdclk_pll.ref, 0);
+}
+
+static int bxt_calc_cdclk(int max_pixclk)
+{
+	if (max_pixclk > 576000)
+		return 624000;
+	else if (max_pixclk > 384000)
+		return 576000;
+	else if (max_pixclk > 288000)
+		return 384000;
+	else if (max_pixclk > 144000)
+		return 288000;
+	else
+		return 144000;
+}
+
+static int glk_calc_cdclk(int max_pixclk)
+{
+	if (max_pixclk > 2 * 158400)
+		return 316800;
+	else if (max_pixclk > 2 * 79200)
+		return 158400;
+	else
+		return 79200;
+}
+
+static int bxt_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+	int ratio;
+
+	if (cdclk == dev_priv->cdclk_pll.ref)
+		return 0;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+	case 144000:
+	case 288000:
+	case 384000:
+	case 576000:
+		ratio = 60;
+		break;
+	case 624000:
+		ratio = 65;
+		break;
+	}
+
+	return dev_priv->cdclk_pll.ref * ratio;
+}
+
+static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+	int ratio;
+
+	if (cdclk == dev_priv->cdclk_pll.ref)
+		return 0;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+	case  79200:
+	case 158400:
+	case 316800:
+		ratio = 33;
+		break;
+	}
+
+	return dev_priv->cdclk_pll.ref * ratio;
+}
+
+static void bxt_de_pll_update(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	dev_priv->cdclk_pll.ref = 19200;
+	dev_priv->cdclk_pll.vco = 0;
+
+	val = I915_READ(BXT_DE_PLL_ENABLE);
+	if ((val & BXT_DE_PLL_PLL_ENABLE) == 0)
+		return;
+
+	if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0))
+		return;
+
+	val = I915_READ(BXT_DE_PLL_CTL);
+	dev_priv->cdclk_pll.vco = (val & BXT_DE_PLL_RATIO_MASK) *
+		dev_priv->cdclk_pll.ref;
+}
+
+static int bxt_get_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 divider;
+	int div, vco;
+
+	bxt_de_pll_update(dev_priv);
+
+	vco = dev_priv->cdclk_pll.vco;
+	if (vco == 0)
+		return dev_priv->cdclk_pll.ref;
+
+	divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK;
+
+	switch (divider) {
+	case BXT_CDCLK_CD2X_DIV_SEL_1:
+		div = 2;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_1_5:
+		WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
+		div = 3;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_2:
+		div = 4;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_4:
+		div = 8;
+		break;
+	default:
+		MISSING_CASE(divider);
+		return dev_priv->cdclk_pll.ref;
+	}
+
+	return DIV_ROUND_CLOSEST(vco, div);
+}
+
+static void bxt_de_pll_disable(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(BXT_DE_PLL_ENABLE, 0);
+
+	/* Timeout 200us */
+	if (intel_wait_for_register(dev_priv,
+				    BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 0,
+				    1))
+		DRM_ERROR("timeout waiting for DE PLL unlock\n");
+
+	dev_priv->cdclk_pll.vco = 0;
+}
+
+static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco)
+{
+	int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk_pll.ref);
+	u32 val;
+
+	val = I915_READ(BXT_DE_PLL_CTL);
+	val &= ~BXT_DE_PLL_RATIO_MASK;
+	val |= BXT_DE_PLL_RATIO(ratio);
+	I915_WRITE(BXT_DE_PLL_CTL, val);
+
+	I915_WRITE(BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE);
+
+	/* Timeout 200us */
+	if (intel_wait_for_register(dev_priv,
+				    BXT_DE_PLL_ENABLE,
+				    BXT_DE_PLL_LOCK,
+				    BXT_DE_PLL_LOCK,
+				    1))
+		DRM_ERROR("timeout waiting for DE PLL lock\n");
+
+	dev_priv->cdclk_pll.vco = vco;
+}
+
+static void bxt_set_cdclk(struct drm_i915_private *dev_priv, int cdclk)
+{
+	u32 val, divider;
+	int vco, ret;
+
+	if (IS_GEMINILAKE(dev_priv))
+		vco = glk_de_pll_vco(dev_priv, cdclk);
+	else
+		vco = bxt_de_pll_vco(dev_priv, cdclk);
+
+	DRM_DEBUG_DRIVER("Changing CDCLK to %d kHz (VCO %d kHz)\n",
+			 cdclk, vco);
+
+	/* cdclk = vco / 2 / div{1,1.5,2,4} */
+	switch (DIV_ROUND_CLOSEST(vco, cdclk)) {
+	case 8:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_4;
+		break;
+	case 4:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_2;
+		break;
+	case 3:
+		WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
+		divider = BXT_CDCLK_CD2X_DIV_SEL_1_5;
+		break;
+	case 2:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
+		break;
+	default:
+		WARN_ON(cdclk != dev_priv->cdclk_pll.ref);
+		WARN_ON(vco != 0);
+
+		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
+		break;
+	}
+
+	/* Inform power controller of upcoming frequency change */
+	mutex_lock(&dev_priv->rps.hw_lock);
+	ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
+				      0x80000000);
+	mutex_unlock(&dev_priv->rps.hw_lock);
+
+	if (ret) {
+		DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n",
+			  ret, cdclk);
+		return;
+	}
+
+	if (dev_priv->cdclk_pll.vco != 0 &&
+	    dev_priv->cdclk_pll.vco != vco)
+		bxt_de_pll_disable(dev_priv);
+
+	if (dev_priv->cdclk_pll.vco != vco)
+		bxt_de_pll_enable(dev_priv, vco);
+
+	val = divider | skl_cdclk_decimal(cdclk);
+	/*
+	 * FIXME if only the cd2x divider needs changing, it could be done
+	 * without shutting off the pipe (if only one pipe is active).
+	 */
+	val |= BXT_CDCLK_CD2X_PIPE_NONE;
+	/*
+	 * Disable SSA Precharge when CD clock frequency < 500 MHz,
+	 * enable otherwise.
+	 */
+	if (cdclk >= 500000)
+		val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
+	I915_WRITE(CDCLK_CTL, val);
+
+	mutex_lock(&dev_priv->rps.hw_lock);
+	ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
+				      DIV_ROUND_UP(cdclk, 25000));
+	mutex_unlock(&dev_priv->rps.hw_lock);
+
+	if (ret) {
+		DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n",
+			  ret, cdclk);
+		return;
+	}
+
+	intel_update_cdclk(dev_priv);
+}
+
+static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 cdctl, expected;
+
+	intel_update_cdclk(dev_priv);
+
+	if (dev_priv->cdclk_pll.vco == 0 ||
+	    dev_priv->cdclk_freq == dev_priv->cdclk_pll.ref)
+		goto sanitize;
+
+	/* DPLL okay; verify the cdclock
+	 *
+	 * Some BIOS versions leave an incorrect decimal frequency value and
+	 * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4,
+	 * so sanitize this register.
+	 */
+	cdctl = I915_READ(CDCLK_CTL);
+	/*
+	 * Let's ignore the pipe field, since BIOS could have configured the
+	 * dividers both synching to an active pipe, or asynchronously
+	 * (PIPE_NONE).
+	 */
+	cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE;
+
+	expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) |
+		   skl_cdclk_decimal(dev_priv->cdclk_freq);
+	/*
+	 * Disable SSA Precharge when CD clock frequency < 500 MHz,
+	 * enable otherwise.
+	 */
+	if (dev_priv->cdclk_freq >= 500000)
+		expected |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
+
+	if (cdctl == expected)
+		/* All well; nothing to sanitize */
+		return;
+
+sanitize:
+	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+
+	/* force cdclk programming */
+	dev_priv->cdclk_freq = 0;
+
+	/* force full PLL disable + enable */
+	dev_priv->cdclk_pll.vco = -1;
+}
+
+/**
+ * bxt_init_cdclk - Initialize CDCLK on BXT
+ * @dev_priv: i915 device
+ *
+ * Initialize CDCLK for BXT and derivatives. This is generally
+ * done only during the display core initialization sequence,
+ * after which the DMC will take care of turning CDCLK off/on
+ * as needed.
+ */
+void bxt_init_cdclk(struct drm_i915_private *dev_priv)
+{
+	int cdclk;
+
+	bxt_sanitize_cdclk(dev_priv);
+
+	if (dev_priv->cdclk_freq != 0 && dev_priv->cdclk_pll.vco != 0)
+		return;
+
+	/*
+	 * FIXME:
+	 * - The initial CDCLK needs to be read from VBT.
+	 *   Need to make this change after VBT has changes for BXT.
+	 */
+	if (IS_GEMINILAKE(dev_priv))
+		cdclk = glk_calc_cdclk(0);
+	else
+		cdclk = bxt_calc_cdclk(0);
+
+	bxt_set_cdclk(dev_priv, cdclk);
+}
+
+/**
+ * bxt_uninit_cdclk - Uninitialize CDCLK on BXT
+ * @dev_priv: i915 device
+ *
+ * Uninitialize CDCLK for BXT and derivatives. This is done only
+ * during the display core uninitialization sequence.
+ */
+void bxt_uninit_cdclk(struct drm_i915_private *dev_priv)
+{
+	bxt_set_cdclk(dev_priv, dev_priv->cdclk_pll.ref);
+}
+
+static int bdw_adjust_min_pipe_pixel_rate(struct intel_crtc_state *crtc_state,
+					  int pixel_rate)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(crtc_state->base.crtc->dev);
+
+	/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
+	if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
+		pixel_rate = DIV_ROUND_UP(pixel_rate * 100, 95);
+
+	/* BSpec says "Do not use DisplayPort with CDCLK less than
+	 * 432 MHz, audio enabled, port width x4, and link rate
+	 * HBR2 (5.4 GHz), or else there may be audio corruption or
+	 * screen corruption."
+	 */
+	if (intel_crtc_has_dp_encoder(crtc_state) &&
+	    crtc_state->has_audio &&
+	    crtc_state->port_clock >= 540000 &&
+	    crtc_state->lane_count == 4)
+		pixel_rate = max(432000, pixel_rate);
+
+	return pixel_rate;
+}
+
+/* compute the max rate for new configuration */
+static int intel_max_pixel_rate(struct drm_atomic_state *state)
+{
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+	struct drm_i915_private *dev_priv = to_i915(state->dev);
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *cstate;
+	struct intel_crtc_state *crtc_state;
+	unsigned int max_pixel_rate = 0, i;
+	enum pipe pipe;
+
+	memcpy(intel_state->min_pixclk, dev_priv->min_pixclk,
+	       sizeof(intel_state->min_pixclk));
+
+	for_each_crtc_in_state(state, crtc, cstate, i) {
+		int pixel_rate;
+
+		crtc_state = to_intel_crtc_state(cstate);
+		if (!crtc_state->base.enable) {
+			intel_state->min_pixclk[i] = 0;
+			continue;
+		}
+
+		pixel_rate = crtc_state->pixel_rate;
+
+		if (IS_BROADWELL(dev_priv) || IS_GEN9(dev_priv))
+			pixel_rate =
+				bdw_adjust_min_pipe_pixel_rate(crtc_state,
+							       pixel_rate);
+
+		intel_state->min_pixclk[i] = pixel_rate;
+	}
+
+	for_each_pipe(dev_priv, pipe)
+		max_pixel_rate = max(intel_state->min_pixclk[pipe],
+				     max_pixel_rate);
+
+	return max_pixel_rate;
+}
+
+static int vlv_modeset_calc_cdclk(struct drm_atomic_state *state)
+{
+	struct drm_device *dev = state->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int max_pixclk = intel_max_pixel_rate(state);
+	struct intel_atomic_state *intel_state =
+		to_intel_atomic_state(state);
+
+	intel_state->cdclk = intel_state->dev_cdclk =
+		vlv_calc_cdclk(dev_priv, max_pixclk);
+
+	if (!intel_state->active_crtcs)
+		intel_state->dev_cdclk = vlv_calc_cdclk(dev_priv, 0);
+
+	return 0;
+}
+
+static void vlv_modeset_commit_cdclk(struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = old_state->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+	unsigned int req_cdclk = old_intel_state->dev_cdclk;
+
+	/*
+	 * FIXME: We can end up here with all power domains off, yet
+	 * with a CDCLK frequency other than the minimum. To account
+	 * for this take the PIPE-A power domain, which covers the HW
+	 * blocks needed for the following programming. This can be
+	 * removed once it's guaranteed that we get here either with
+	 * the minimum CDCLK set, or the required power domains
+	 * enabled.
+	 */
+	intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
+
+	if (IS_CHERRYVIEW(dev_priv))
+		chv_set_cdclk(dev, req_cdclk);
+	else
+		vlv_set_cdclk(dev, req_cdclk);
+
+	vlv_program_pfi_credits(dev_priv);
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A);
+}
+
+static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->dev);
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+	int max_pixclk = intel_max_pixel_rate(state);
+	int cdclk;
+
+	/*
+	 * FIXME should also account for plane ratio
+	 * once 64bpp pixel formats are supported.
+	 */
+	cdclk = bdw_calc_cdclk(max_pixclk);
+
+	if (cdclk > dev_priv->max_cdclk_freq) {
+		DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
+			      cdclk, dev_priv->max_cdclk_freq);
+		return -EINVAL;
+	}
+
+	intel_state->cdclk = intel_state->dev_cdclk = cdclk;
+	if (!intel_state->active_crtcs)
+		intel_state->dev_cdclk = bdw_calc_cdclk(0);
+
+	return 0;
+}
+
+static void bdw_modeset_commit_cdclk(struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = old_state->dev;
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+	unsigned int req_cdclk = old_intel_state->dev_cdclk;
+
+	bdw_set_cdclk(dev, req_cdclk);
+}
+
+static int skl_modeset_calc_cdclk(struct drm_atomic_state *state)
+{
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+	struct drm_i915_private *dev_priv = to_i915(state->dev);
+	const int max_pixclk = intel_max_pixel_rate(state);
+	int vco = intel_state->cdclk_pll_vco;
+	int cdclk;
+
+	/*
+	 * FIXME should also account for plane ratio
+	 * once 64bpp pixel formats are supported.
+	 */
+	cdclk = skl_calc_cdclk(max_pixclk, vco);
+
+	/*
+	 * FIXME move the cdclk caclulation to
+	 * compute_config() so we can fail gracegully.
+	 */
+	if (cdclk > dev_priv->max_cdclk_freq) {
+		DRM_ERROR("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
+			  cdclk, dev_priv->max_cdclk_freq);
+		cdclk = dev_priv->max_cdclk_freq;
+	}
+
+	intel_state->cdclk = intel_state->dev_cdclk = cdclk;
+	if (!intel_state->active_crtcs)
+		intel_state->dev_cdclk = skl_calc_cdclk(0, vco);
+
+	return 0;
+}
+
+static void skl_modeset_commit_cdclk(struct drm_atomic_state *old_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(old_state->dev);
+	struct intel_atomic_state *intel_state =
+		to_intel_atomic_state(old_state);
+	unsigned int req_cdclk = intel_state->dev_cdclk;
+	unsigned int req_vco = intel_state->cdclk_pll_vco;
+
+	skl_set_cdclk(dev_priv, req_cdclk, req_vco);
+}
+
+static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->dev);
+	int max_pixclk = intel_max_pixel_rate(state);
+	struct intel_atomic_state *intel_state =
+		to_intel_atomic_state(state);
+	int cdclk;
+
+	if (IS_GEMINILAKE(dev_priv))
+		cdclk = glk_calc_cdclk(max_pixclk);
+	else
+		cdclk = bxt_calc_cdclk(max_pixclk);
+
+	intel_state->cdclk = intel_state->dev_cdclk = cdclk;
+
+	if (!intel_state->active_crtcs) {
+		if (IS_GEMINILAKE(dev_priv))
+			cdclk = glk_calc_cdclk(0);
+		else
+			cdclk = bxt_calc_cdclk(0);
+
+		intel_state->dev_cdclk = cdclk;
+	}
+
+	return 0;
+}
+
+static void bxt_modeset_commit_cdclk(struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = old_state->dev;
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+	unsigned int req_cdclk = old_intel_state->dev_cdclk;
+
+	bxt_set_cdclk(to_i915(dev), req_cdclk);
+}
+
+static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv)
+{
+	int max_cdclk_freq = dev_priv->max_cdclk_freq;
+
+	if (IS_GEMINILAKE(dev_priv))
+		return 2 * max_cdclk_freq;
+	else if (INTEL_INFO(dev_priv)->gen >= 9 ||
+		 IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		return max_cdclk_freq;
+	else if (IS_CHERRYVIEW(dev_priv))
+		return max_cdclk_freq*95/100;
+	else if (INTEL_INFO(dev_priv)->gen < 4)
+		return 2*max_cdclk_freq*90/100;
+	else
+		return max_cdclk_freq*90/100;
+}
+
+/**
+ * intel_update_max_cdclk - Determine the maximum support CDCLK frequency
+ * @dev_priv: i915 device
+ *
+ * Determine the maximum CDCLK frequency the platform supports, and also
+ * derive the maximum dot clock frequency the maximum CDCLK frequency
+ * allows.
+ */
+void intel_update_max_cdclk(struct drm_i915_private *dev_priv)
+{
+	if (IS_GEN9_BC(dev_priv)) {
+		u32 limit = I915_READ(SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK;
+		int max_cdclk, vco;
+
+		vco = dev_priv->skl_preferred_vco_freq;
+		WARN_ON(vco != 8100000 && vco != 8640000);
+
+		/*
+		 * Use the lower (vco 8640) cdclk values as a
+		 * first guess. skl_calc_cdclk() will correct it
+		 * if the preferred vco is 8100 instead.
+		 */
+		if (limit == SKL_DFSM_CDCLK_LIMIT_675)
+			max_cdclk = 617143;
+		else if (limit == SKL_DFSM_CDCLK_LIMIT_540)
+			max_cdclk = 540000;
+		else if (limit == SKL_DFSM_CDCLK_LIMIT_450)
+			max_cdclk = 432000;
+		else
+			max_cdclk = 308571;
+
+		dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco);
+	} else if (IS_GEMINILAKE(dev_priv)) {
+		dev_priv->max_cdclk_freq = 316800;
+	} else if (IS_BROXTON(dev_priv)) {
+		dev_priv->max_cdclk_freq = 624000;
+	} else if (IS_BROADWELL(dev_priv))  {
+		/*
+		 * FIXME with extra cooling we can allow
+		 * 540 MHz for ULX and 675 Mhz for ULT.
+		 * How can we know if extra cooling is
+		 * available? PCI ID, VTB, something else?
+		 */
+		if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+			dev_priv->max_cdclk_freq = 450000;
+		else if (IS_BDW_ULX(dev_priv))
+			dev_priv->max_cdclk_freq = 450000;
+		else if (IS_BDW_ULT(dev_priv))
+			dev_priv->max_cdclk_freq = 540000;
+		else
+			dev_priv->max_cdclk_freq = 675000;
+	} else if (IS_CHERRYVIEW(dev_priv)) {
+		dev_priv->max_cdclk_freq = 320000;
+	} else if (IS_VALLEYVIEW(dev_priv)) {
+		dev_priv->max_cdclk_freq = 400000;
+	} else {
+		/* otherwise assume cdclk is fixed */
+		dev_priv->max_cdclk_freq = dev_priv->cdclk_freq;
+	}
+
+	dev_priv->max_dotclk_freq = intel_compute_max_dotclk(dev_priv);
+
+	DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n",
+			 dev_priv->max_cdclk_freq);
+
+	DRM_DEBUG_DRIVER("Max dotclock rate: %d kHz\n",
+			 dev_priv->max_dotclk_freq);
+}
+
+/**
+ * intel_update_cdclk - Determine the current CDCLK frequency
+ * @dev_priv: i915 device
+ *
+ * Determine the current CDCLK frequency.
+ */
+void intel_update_cdclk(struct drm_i915_private *dev_priv)
+{
+	dev_priv->cdclk_freq = dev_priv->display.get_cdclk(dev_priv);
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz, VCO: %d kHz, ref: %d kHz\n",
+				 dev_priv->cdclk_freq, dev_priv->cdclk_pll.vco,
+				 dev_priv->cdclk_pll.ref);
+	else
+		DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz\n",
+				 dev_priv->cdclk_freq);
+
+	/*
+	 * 9:0 CMBUS [sic] CDCLK frequency (cdfreq):
+	 * Programmng [sic] note: bit[9:2] should be programmed to the number
+	 * of cdclk that generates 4MHz reference clock freq which is used to
+	 * generate GMBus clock. This will vary with the cdclk freq.
+	 */
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		I915_WRITE(GMBUSFREQ_VLV,
+			   DIV_ROUND_UP(dev_priv->cdclk_freq, 1000));
+}
+
+static int pch_rawclk(struct drm_i915_private *dev_priv)
+{
+	return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000;
+}
+
+static int vlv_hrawclk(struct drm_i915_private *dev_priv)
+{
+	/* RAWCLK_FREQ_VLV register updated from power well code */
+	return vlv_get_cck_clock_hpll(dev_priv, "hrawclk",
+				      CCK_DISPLAY_REF_CLOCK_CONTROL);
+}
+
+static int g4x_hrawclk(struct drm_i915_private *dev_priv)
+{
+	uint32_t clkcfg;
+
+	/* hrawclock is 1/4 the FSB frequency */
+	clkcfg = I915_READ(CLKCFG);
+	switch (clkcfg & CLKCFG_FSB_MASK) {
+	case CLKCFG_FSB_400:
+		return 100000;
+	case CLKCFG_FSB_533:
+		return 133333;
+	case CLKCFG_FSB_667:
+		return 166667;
+	case CLKCFG_FSB_800:
+		return 200000;
+	case CLKCFG_FSB_1067:
+		return 266667;
+	case CLKCFG_FSB_1333:
+		return 333333;
+	/* these two are just a guess; one of them might be right */
+	case CLKCFG_FSB_1600:
+	case CLKCFG_FSB_1600_ALT:
+		return 400000;
+	default:
+		return 133333;
+	}
+}
+
+/**
+ * intel_update_rawclk - Determine the current RAWCLK frequency
+ * @dev_priv: i915 device
+ *
+ * Determine the current RAWCLK frequency. RAWCLK is a fixed
+ * frequency clock so this needs to done only once.
+ */
+void intel_update_rawclk(struct drm_i915_private *dev_priv)
+{
+	if (HAS_PCH_SPLIT(dev_priv))
+		dev_priv->rawclk_freq = pch_rawclk(dev_priv);
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		dev_priv->rawclk_freq = vlv_hrawclk(dev_priv);
+	else if (IS_G4X(dev_priv) || IS_PINEVIEW(dev_priv))
+		dev_priv->rawclk_freq = g4x_hrawclk(dev_priv);
+	else
+		/* no rawclk on other platforms, or no need to know it */
+		return;
+
+	DRM_DEBUG_DRIVER("rawclk rate: %d kHz\n", dev_priv->rawclk_freq);
+}
+
+/**
+ * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks
+ * @dev_priv: i915 device
+ */
+void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
+{
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		dev_priv->display.modeset_commit_cdclk =
+			vlv_modeset_commit_cdclk;
+		dev_priv->display.modeset_calc_cdclk =
+			vlv_modeset_calc_cdclk;
+	} else if (IS_BROADWELL(dev_priv)) {
+		dev_priv->display.modeset_commit_cdclk =
+			bdw_modeset_commit_cdclk;
+		dev_priv->display.modeset_calc_cdclk =
+			bdw_modeset_calc_cdclk;
+	} else if (IS_GEN9_LP(dev_priv)) {
+		dev_priv->display.modeset_commit_cdclk =
+			bxt_modeset_commit_cdclk;
+		dev_priv->display.modeset_calc_cdclk =
+			bxt_modeset_calc_cdclk;
+	} else if (IS_GEN9_BC(dev_priv)) {
+		dev_priv->display.modeset_commit_cdclk =
+			skl_modeset_commit_cdclk;
+		dev_priv->display.modeset_calc_cdclk =
+			skl_modeset_calc_cdclk;
+	}
+
+	if (IS_GEN9_BC(dev_priv))
+		dev_priv->display.get_cdclk = skl_get_cdclk;
+	else if (IS_GEN9_LP(dev_priv))
+		dev_priv->display.get_cdclk = bxt_get_cdclk;
+	else if (IS_BROADWELL(dev_priv))
+		dev_priv->display.get_cdclk = bdw_get_cdclk;
+	else if (IS_HASWELL(dev_priv))
+		dev_priv->display.get_cdclk = hsw_get_cdclk;
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		dev_priv->display.get_cdclk = vlv_get_cdclk;
+	else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
+		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
+	else if (IS_GEN5(dev_priv))
+		dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk;
+	else if (IS_GM45(dev_priv))
+		dev_priv->display.get_cdclk = gm45_get_cdclk;
+	else if (IS_G4X(dev_priv))
+		dev_priv->display.get_cdclk = g33_get_cdclk;
+	else if (IS_I965GM(dev_priv))
+		dev_priv->display.get_cdclk = i965gm_get_cdclk;
+	else if (IS_I965G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
+	else if (IS_PINEVIEW(dev_priv))
+		dev_priv->display.get_cdclk = pnv_get_cdclk;
+	else if (IS_G33(dev_priv))
+		dev_priv->display.get_cdclk = g33_get_cdclk;
+	else if (IS_I945GM(dev_priv))
+		dev_priv->display.get_cdclk = i945gm_get_cdclk;
+	else if (IS_I945G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
+	else if (IS_I915GM(dev_priv))
+		dev_priv->display.get_cdclk = i915gm_get_cdclk;
+	else if (IS_I915G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk;
+	else if (IS_I865G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk;
+	else if (IS_I85X(dev_priv))
+		dev_priv->display.get_cdclk = i85x_get_cdclk;
+	else if (IS_I845G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk;
+	else { /* 830 */
+		WARN(!IS_I830(dev_priv),
+		     "Unknown platform. Assuming 133 MHz CDCLK\n");
+		dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk;
+	}
+}

drivers/gpu/drm/i915/intel_display.c

@@ -122,9 +122,6 @@ static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force);
 static void ironlake_pfit_enable(struct intel_crtc *crtc);
 static void intel_modeset_setup_hw_state(struct drm_device *dev);
 static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
-static int intel_max_pixel_rate(struct drm_atomic_state *state);
-static int glk_calc_cdclk(int max_pixclk);
-static int bxt_calc_cdclk(int max_pixclk);
 
 struct intel_limit {
 	struct {
@@ -170,7 +167,7 @@ int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
 	return DIV_ROUND_CLOSEST(ref_freq << 1, divider + 1);
 }
 
-static int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
+int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
 			   const char *name, u32 reg)
 {
 	if (dev_priv->hpll_freq == 0)
@@ -180,63 +177,6 @@ static int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
 				 dev_priv->hpll_freq);
 }
 
-static int
-intel_pch_rawclk(struct drm_i915_private *dev_priv)
-{
-	return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000;
-}
-
-static int
-intel_vlv_hrawclk(struct drm_i915_private *dev_priv)
-{
-	/* RAWCLK_FREQ_VLV register updated from power well code */
-	return vlv_get_cck_clock_hpll(dev_priv, "hrawclk",
-				      CCK_DISPLAY_REF_CLOCK_CONTROL);
-}
-
-static int
-intel_g4x_hrawclk(struct drm_i915_private *dev_priv)
-{
-	uint32_t clkcfg;
-
-	/* hrawclock is 1/4 the FSB frequency */
-	clkcfg = I915_READ(CLKCFG);
-	switch (clkcfg & CLKCFG_FSB_MASK) {
-	case CLKCFG_FSB_400:
-		return 100000;
-	case CLKCFG_FSB_533:
-		return 133333;
-	case CLKCFG_FSB_667:
-		return 166667;
-	case CLKCFG_FSB_800:
-		return 200000;
-	case CLKCFG_FSB_1067:
-		return 266667;
-	case CLKCFG_FSB_1333:
-		return 333333;
-	/* these two are just a guess; one of them might be right */
-	case CLKCFG_FSB_1600:
-	case CLKCFG_FSB_1600_ALT:
-		return 400000;
-	default:
-		return 133333;
-	}
-}
-
-void intel_update_rawclk(struct drm_i915_private *dev_priv)
-{
-	if (HAS_PCH_SPLIT(dev_priv))
-		dev_priv->rawclk_freq = intel_pch_rawclk(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		dev_priv->rawclk_freq = intel_vlv_hrawclk(dev_priv);
-	else if (IS_G4X(dev_priv) || IS_PINEVIEW(dev_priv))
-		dev_priv->rawclk_freq = intel_g4x_hrawclk(dev_priv);
-	else
-		return; /* no rawclk on other platforms, or no need to know it */
-
-	DRM_DEBUG_DRIVER("rawclk rate: %d kHz\n", dev_priv->rawclk_freq);
-}
-
 static void intel_update_czclk(struct drm_i915_private *dev_priv)
 {
 	if (!(IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)))
@@ -5791,1085 +5731,203 @@ static void modeset_put_power_domains(struct drm_i915_private *dev_priv,
 		intel_display_power_put(dev_priv, domain);
 }
 
-static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv)
+static void valleyview_crtc_enable(struct intel_crtc_state *pipe_config,
+				   struct drm_atomic_state *old_state)
 {
-	int max_cdclk_freq = dev_priv->max_cdclk_freq;
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
 
-	if (IS_GEMINILAKE(dev_priv))
-		return 2 * max_cdclk_freq;
-	else if (INTEL_INFO(dev_priv)->gen >= 9 ||
-		 IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		return max_cdclk_freq;
-	else if (IS_CHERRYVIEW(dev_priv))
-		return max_cdclk_freq*95/100;
-	else if (INTEL_INFO(dev_priv)->gen < 4)
-		return 2*max_cdclk_freq*90/100;
-	else
-		return max_cdclk_freq*90/100;
-}
+	if (WARN_ON(intel_crtc->active))
+		return;
 
-static int skl_calc_cdclk(int max_pixclk, int vco);
+	if (intel_crtc_has_dp_encoder(intel_crtc->config))
+		intel_dp_set_m_n(intel_crtc, M1_N1);
 
-static void intel_update_max_cdclk(struct drm_i915_private *dev_priv)
-{
-	if (IS_GEN9_BC(dev_priv)) {
-		u32 limit = I915_READ(SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK;
-		int max_cdclk, vco;
+	intel_set_pipe_timings(intel_crtc);
+	intel_set_pipe_src_size(intel_crtc);
 
-		vco = dev_priv->skl_preferred_vco_freq;
-		WARN_ON(vco != 8100000 && vco != 8640000);
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B) {
+		struct drm_i915_private *dev_priv = to_i915(dev);
 
-		/*
-		 * Use the lower (vco 8640) cdclk values as a
-		 * first guess. skl_calc_cdclk() will correct it
-		 * if the preferred vco is 8100 instead.
-		 */
-		if (limit == SKL_DFSM_CDCLK_LIMIT_675)
-			max_cdclk = 617143;
-		else if (limit == SKL_DFSM_CDCLK_LIMIT_540)
-			max_cdclk = 540000;
-		else if (limit == SKL_DFSM_CDCLK_LIMIT_450)
-			max_cdclk = 432000;
-		else
-			max_cdclk = 308571;
-
-		dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco);
-	} else if (IS_GEMINILAKE(dev_priv)) {
-		dev_priv->max_cdclk_freq = 316800;
-	} else if (IS_BROXTON(dev_priv)) {
-		dev_priv->max_cdclk_freq = 624000;
-	} else if (IS_BROADWELL(dev_priv))  {
-		/*
-		 * FIXME with extra cooling we can allow
-		 * 540 MHz for ULX and 675 Mhz for ULT.
-		 * How can we know if extra cooling is
-		 * available? PCI ID, VTB, something else?
-		 */
-		if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
-			dev_priv->max_cdclk_freq = 450000;
-		else if (IS_BDW_ULX(dev_priv))
-			dev_priv->max_cdclk_freq = 450000;
-		else if (IS_BDW_ULT(dev_priv))
-			dev_priv->max_cdclk_freq = 540000;
-		else
-			dev_priv->max_cdclk_freq = 675000;
-	} else if (IS_CHERRYVIEW(dev_priv)) {
-		dev_priv->max_cdclk_freq = 320000;
-	} else if (IS_VALLEYVIEW(dev_priv)) {
-		dev_priv->max_cdclk_freq = 400000;
-	} else {
-		/* otherwise assume cdclk is fixed */
-		dev_priv->max_cdclk_freq = dev_priv->cdclk_freq;
+		I915_WRITE(CHV_BLEND(pipe), CHV_BLEND_LEGACY);
+		I915_WRITE(CHV_CANVAS(pipe), 0);
 	}
 
-	dev_priv->max_dotclk_freq = intel_compute_max_dotclk(dev_priv);
-
-	DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n",
-			 dev_priv->max_cdclk_freq);
-
-	DRM_DEBUG_DRIVER("Max dotclock rate: %d kHz\n",
-			 dev_priv->max_dotclk_freq);
-}
-
-static void intel_update_cdclk(struct drm_i915_private *dev_priv)
-{
-	dev_priv->cdclk_freq = dev_priv->display.get_cdclk(dev_priv);
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz, VCO: %d kHz, ref: %d kHz\n",
-				 dev_priv->cdclk_freq, dev_priv->cdclk_pll.vco,
-				 dev_priv->cdclk_pll.ref);
-	else
-		DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz\n",
-				 dev_priv->cdclk_freq);
-
-	/*
-	 * 9:0 CMBUS [sic] CDCLK frequency (cdfreq):
-	 * Programmng [sic] note: bit[9:2] should be programmed to the number
-	 * of cdclk that generates 4MHz reference clock freq which is used to
-	 * generate GMBus clock. This will vary with the cdclk freq.
-	 */
-	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->cdclk_freq, 1000));
-}
+	i9xx_set_pipeconf(intel_crtc);
 
-/* convert from kHz to .1 fixpoint MHz with -1MHz offset */
-static int skl_cdclk_decimal(int cdclk)
-{
-	return DIV_ROUND_CLOSEST(cdclk - 1000, 500);
-}
+	intel_crtc->active = true;
 
-static int bxt_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
-{
-	int ratio;
+	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
 
-	if (cdclk == dev_priv->cdclk_pll.ref)
-		return 0;
+	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
 
-	switch (cdclk) {
-	default:
-		MISSING_CASE(cdclk);
-	case 144000:
-	case 288000:
-	case 384000:
-	case 576000:
-		ratio = 60;
-		break;
-	case 624000:
-		ratio = 65;
-		break;
+	if (IS_CHERRYVIEW(dev_priv)) {
+		chv_prepare_pll(intel_crtc, intel_crtc->config);
+		chv_enable_pll(intel_crtc, intel_crtc->config);
+	} else {
+		vlv_prepare_pll(intel_crtc, intel_crtc->config);
+		vlv_enable_pll(intel_crtc, intel_crtc->config);
 	}
 
-	return dev_priv->cdclk_pll.ref * ratio;
-}
+	intel_encoders_pre_enable(crtc, pipe_config, old_state);
 
-static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
-{
-	int ratio;
+	i9xx_pfit_enable(intel_crtc);
 
-	if (cdclk == dev_priv->cdclk_pll.ref)
-		return 0;
+	intel_color_load_luts(&pipe_config->base);
 
-	switch (cdclk) {
-	default:
-		MISSING_CASE(cdclk);
-	case  79200:
-	case 158400:
-	case 316800:
-		ratio = 33;
-		break;
-	}
+	intel_update_watermarks(intel_crtc);
+	intel_enable_pipe(intel_crtc);
+
+	assert_vblank_disabled(crtc);
+	drm_crtc_vblank_on(crtc);
 
-	return dev_priv->cdclk_pll.ref * ratio;
+	intel_encoders_enable(crtc, pipe_config, old_state);
 }
 
-static void bxt_de_pll_disable(struct drm_i915_private *dev_priv)
+static void i9xx_set_pll_dividers(struct intel_crtc *crtc)
 {
-	I915_WRITE(BXT_DE_PLL_ENABLE, 0);
-
-	/* Timeout 200us */
-	if (intel_wait_for_register(dev_priv,
-				    BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 0,
-				    1))
-		DRM_ERROR("timeout waiting for DE PLL unlock\n");
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
 
-	dev_priv->cdclk_pll.vco = 0;
+	I915_WRITE(FP0(crtc->pipe), crtc->config->dpll_hw_state.fp0);
+	I915_WRITE(FP1(crtc->pipe), crtc->config->dpll_hw_state.fp1);
 }
 
-static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco)
+static void i9xx_crtc_enable(struct intel_crtc_state *pipe_config,
+			     struct drm_atomic_state *old_state)
 {
-	int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk_pll.ref);
-	u32 val;
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	enum pipe pipe = intel_crtc->pipe;
 
-	val = I915_READ(BXT_DE_PLL_CTL);
-	val &= ~BXT_DE_PLL_RATIO_MASK;
-	val |= BXT_DE_PLL_RATIO(ratio);
-	I915_WRITE(BXT_DE_PLL_CTL, val);
+	if (WARN_ON(intel_crtc->active))
+		return;
 
-	I915_WRITE(BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE);
+	i9xx_set_pll_dividers(intel_crtc);
 
-	/* Timeout 200us */
-	if (intel_wait_for_register(dev_priv,
-				    BXT_DE_PLL_ENABLE,
-				    BXT_DE_PLL_LOCK,
-				    BXT_DE_PLL_LOCK,
-				    1))
-		DRM_ERROR("timeout waiting for DE PLL lock\n");
+	if (intel_crtc_has_dp_encoder(intel_crtc->config))
+		intel_dp_set_m_n(intel_crtc, M1_N1);
 
-	dev_priv->cdclk_pll.vco = vco;
-}
+	intel_set_pipe_timings(intel_crtc);
+	intel_set_pipe_src_size(intel_crtc);
 
-static void bxt_set_cdclk(struct drm_i915_private *dev_priv, int cdclk)
-{
-	u32 val, divider;
-	int vco, ret;
+	i9xx_set_pipeconf(intel_crtc);
 
-	if (IS_GEMINILAKE(dev_priv))
-		vco = glk_de_pll_vco(dev_priv, cdclk);
-	else
-		vco = bxt_de_pll_vco(dev_priv, cdclk);
+	intel_crtc->active = true;
 
-	DRM_DEBUG_DRIVER("Changing CDCLK to %d kHz (VCO %d kHz)\n", cdclk, vco);
+	if (!IS_GEN2(dev_priv))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
 
-	/* cdclk = vco / 2 / div{1,1.5,2,4} */
-	switch (DIV_ROUND_CLOSEST(vco, cdclk)) {
-	case 8:
-		divider = BXT_CDCLK_CD2X_DIV_SEL_4;
-		break;
-	case 4:
-		divider = BXT_CDCLK_CD2X_DIV_SEL_2;
-		break;
-	case 3:
-		WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
-		divider = BXT_CDCLK_CD2X_DIV_SEL_1_5;
-		break;
-	case 2:
-		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
-		break;
-	default:
-		WARN_ON(cdclk != dev_priv->cdclk_pll.ref);
-		WARN_ON(vco != 0);
+	intel_encoders_pre_enable(crtc, pipe_config, old_state);
 
-		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
-		break;
-	}
+	i9xx_enable_pll(intel_crtc);
 
-	/* Inform power controller of upcoming frequency change */
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
-				      0x80000000);
-	mutex_unlock(&dev_priv->rps.hw_lock);
+	i9xx_pfit_enable(intel_crtc);
 
-	if (ret) {
-		DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n",
-			  ret, cdclk);
-		return;
-	}
+	intel_color_load_luts(&pipe_config->base);
 
-	if (dev_priv->cdclk_pll.vco != 0 &&
-	    dev_priv->cdclk_pll.vco != vco)
-		bxt_de_pll_disable(dev_priv);
+	intel_update_watermarks(intel_crtc);
+	intel_enable_pipe(intel_crtc);
 
-	if (dev_priv->cdclk_pll.vco != vco)
-		bxt_de_pll_enable(dev_priv, vco);
+	assert_vblank_disabled(crtc);
+	drm_crtc_vblank_on(crtc);
 
-	val = divider | skl_cdclk_decimal(cdclk);
-	/*
-	 * FIXME if only the cd2x divider needs changing, it could be done
-	 * without shutting off the pipe (if only one pipe is active).
-	 */
-	val |= BXT_CDCLK_CD2X_PIPE_NONE;
-	/*
-	 * Disable SSA Precharge when CD clock frequency < 500 MHz,
-	 * enable otherwise.
-	 */
-	if (cdclk >= 500000)
-		val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
-	I915_WRITE(CDCLK_CTL, val);
+	intel_encoders_enable(crtc, pipe_config, old_state);
+}
 
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
-				      DIV_ROUND_UP(cdclk, 25000));
-	mutex_unlock(&dev_priv->rps.hw_lock);
+static void i9xx_pfit_disable(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
 
-	if (ret) {
-		DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n",
-			  ret, cdclk);
+	if (!crtc->config->gmch_pfit.control)
 		return;
-	}
 
-	intel_update_cdclk(dev_priv);
+	assert_pipe_disabled(dev_priv, crtc->pipe);
+
+	DRM_DEBUG_DRIVER("disabling pfit, current: 0x%08x\n",
+			 I915_READ(PFIT_CONTROL));
+	I915_WRITE(PFIT_CONTROL, 0);
 }
 
-static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv)
+static void i9xx_crtc_disable(struct intel_crtc_state *old_crtc_state,
+			      struct drm_atomic_state *old_state)
 {
-	u32 cdctl, expected;
-
-	intel_update_cdclk(dev_priv);
-
-	if (dev_priv->cdclk_pll.vco == 0 ||
-	    dev_priv->cdclk_freq == dev_priv->cdclk_pll.ref)
-		goto sanitize;
-
-	/* DPLL okay; verify the cdclock
-	 *
-	 * Some BIOS versions leave an incorrect decimal frequency value and
-	 * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4,
-	 * so sanitize this register.
-	 */
-	cdctl = I915_READ(CDCLK_CTL);
-	/*
-	 * Let's ignore the pipe field, since BIOS could have configured the
-	 * dividers both synching to an active pipe, or asynchronously
-	 * (PIPE_NONE).
-	 */
-	cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE;
+	struct drm_crtc *crtc = old_crtc_state->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
 
-	expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) |
-		   skl_cdclk_decimal(dev_priv->cdclk_freq);
 	/*
-	 * Disable SSA Precharge when CD clock frequency < 500 MHz,
-	 * enable otherwise.
+	 * On gen2 planes are double buffered but the pipe isn't, so we must
+	 * wait for planes to fully turn off before disabling the pipe.
 	 */
-	if (dev_priv->cdclk_freq >= 500000)
-		expected |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
-
-	if (cdctl == expected)
-		/* All well; nothing to sanitize */
-		return;
-
-sanitize:
-	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+	if (IS_GEN2(dev_priv))
+		intel_wait_for_vblank(dev_priv, pipe);
 
-	/* force cdclk programming */
-	dev_priv->cdclk_freq = 0;
+	intel_encoders_disable(crtc, old_crtc_state, old_state);
 
-	/* force full PLL disable + enable */
-	dev_priv->cdclk_pll.vco = -1;
-}
+	drm_crtc_vblank_off(crtc);
+	assert_vblank_disabled(crtc);
 
-void bxt_init_cdclk(struct drm_i915_private *dev_priv)
-{
-	int cdclk;
+	intel_disable_pipe(intel_crtc);
 
-	bxt_sanitize_cdclk(dev_priv);
+	i9xx_pfit_disable(intel_crtc);
 
-	if (dev_priv->cdclk_freq != 0 && dev_priv->cdclk_pll.vco != 0)
-		return;
+	intel_encoders_post_disable(crtc, old_crtc_state, old_state);
 
-	/*
-	 * FIXME:
-	 * - The initial CDCLK needs to be read from VBT.
-	 *   Need to make this change after VBT has changes for BXT.
-	 */
-	if (IS_GEMINILAKE(dev_priv))
-		cdclk = glk_calc_cdclk(0);
+	if (!intel_crtc_has_type(intel_crtc->config, INTEL_OUTPUT_DSI)) {
+		if (IS_CHERRYVIEW(dev_priv))
+			chv_disable_pll(dev_priv, pipe);
+		else if (IS_VALLEYVIEW(dev_priv))
+			vlv_disable_pll(dev_priv, pipe);
 		else
-		cdclk = bxt_calc_cdclk(0);
-
-	bxt_set_cdclk(dev_priv, cdclk);
-}
+			i9xx_disable_pll(intel_crtc);
+	}
 
-void bxt_uninit_cdclk(struct drm_i915_private *dev_priv)
-{
-	bxt_set_cdclk(dev_priv, dev_priv->cdclk_pll.ref);
-}
+	intel_encoders_post_pll_disable(crtc, old_crtc_state, old_state);
 
-static int skl_calc_cdclk(int max_pixclk, int vco)
-{
-	if (vco == 8640000) {
-		if (max_pixclk > 540000)
-			return 617143;
-		else if (max_pixclk > 432000)
-			return 540000;
-		else if (max_pixclk > 308571)
-			return 432000;
-		else
-			return 308571;
-	} else {
-		if (max_pixclk > 540000)
-			return 675000;
-		else if (max_pixclk > 450000)
-			return 540000;
-		else if (max_pixclk > 337500)
-			return 450000;
-		else
-			return 337500;
-	}
+	if (!IS_GEN2(dev_priv))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
 }
 
-static void
-skl_dpll0_update(struct drm_i915_private *dev_priv)
+static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
 {
-	u32 val;
-
-	dev_priv->cdclk_pll.ref = 24000;
-	dev_priv->cdclk_pll.vco = 0;
-
-	val = I915_READ(LCPLL1_CTL);
-	if ((val & LCPLL_PLL_ENABLE) == 0)
-		return;
+	struct intel_encoder *encoder;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	enum intel_display_power_domain domain;
+	unsigned long domains;
+	struct drm_atomic_state *state;
+	struct intel_crtc_state *crtc_state;
+	int ret;
 
-	if (WARN_ON((val & LCPLL_PLL_LOCK) == 0))
+	if (!intel_crtc->active)
 		return;
 
-	val = I915_READ(DPLL_CTRL1);
+	if (crtc->primary->state->visible) {
+		WARN_ON(intel_crtc->flip_work);
 
-	if (WARN_ON((val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) |
-			    DPLL_CTRL1_SSC(SKL_DPLL0) |
-			    DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) !=
-		    DPLL_CTRL1_OVERRIDE(SKL_DPLL0)))
-		return;
+		intel_pre_disable_primary_noatomic(crtc);
 
-	switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) {
-	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0):
-	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0):
-	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0):
-	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0):
-		dev_priv->cdclk_pll.vco = 8100000;
-		break;
-	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0):
-	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0):
-		dev_priv->cdclk_pll.vco = 8640000;
-		break;
-	default:
-		MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0));
-		break;
+		intel_crtc_disable_planes(crtc, 1 << drm_plane_index(crtc->primary));
+		crtc->primary->state->visible = false;
 	}
-}
 
-void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv, int vco)
-{
-	bool changed = dev_priv->skl_preferred_vco_freq != vco;
+	state = drm_atomic_state_alloc(crtc->dev);
+	if (!state) {
+		DRM_DEBUG_KMS("failed to disable [CRTC:%d:%s], out of memory",
+			      crtc->base.id, crtc->name);
+		return;
+	}
 
-	dev_priv->skl_preferred_vco_freq = vco;
-
-	if (changed)
-		intel_update_max_cdclk(dev_priv);
-}
-
-static void
-skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco)
-{
-	int min_cdclk = skl_calc_cdclk(0, vco);
-	u32 val;
-
-	WARN_ON(vco != 8100000 && vco != 8640000);
-
-	/* select the minimum CDCLK before enabling DPLL 0 */
-	val = CDCLK_FREQ_337_308 | skl_cdclk_decimal(min_cdclk);
-	I915_WRITE(CDCLK_CTL, val);
-	POSTING_READ(CDCLK_CTL);
-
-	/*
-	 * We always enable DPLL0 with the lowest link rate possible, but still
-	 * taking into account the VCO required to operate the eDP panel at the
-	 * desired frequency. The usual DP link rates operate with a VCO of
-	 * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640.
-	 * The modeset code is responsible for the selection of the exact link
-	 * rate later on, with the constraint of choosing a frequency that
-	 * works with vco.
-	 */
-	val = I915_READ(DPLL_CTRL1);
-
-	val &= ~(DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | DPLL_CTRL1_SSC(SKL_DPLL0) |
-		 DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0));
-	val |= DPLL_CTRL1_OVERRIDE(SKL_DPLL0);
-	if (vco == 8640000)
-		val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080,
-					    SKL_DPLL0);
-	else
-		val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810,
-					    SKL_DPLL0);
-
-	I915_WRITE(DPLL_CTRL1, val);
-	POSTING_READ(DPLL_CTRL1);
-
-	I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) | LCPLL_PLL_ENABLE);
-
-	if (intel_wait_for_register(dev_priv,
-				    LCPLL1_CTL, LCPLL_PLL_LOCK, LCPLL_PLL_LOCK,
-				    5))
-		DRM_ERROR("DPLL0 not locked\n");
-
-	dev_priv->cdclk_pll.vco = vco;
-
-	/* We'll want to keep using the current vco from now on. */
-	skl_set_preferred_cdclk_vco(dev_priv, vco);
-}
-
-static void
-skl_dpll0_disable(struct drm_i915_private *dev_priv)
-{
-	I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) & ~LCPLL_PLL_ENABLE);
-	if (intel_wait_for_register(dev_priv,
-				   LCPLL1_CTL, LCPLL_PLL_LOCK, 0,
-				   1))
-		DRM_ERROR("Couldn't disable DPLL0\n");
-
-	dev_priv->cdclk_pll.vco = 0;
-}
-
-static void skl_set_cdclk(struct drm_i915_private *dev_priv, int cdclk, int vco)
-{
-	u32 freq_select, pcu_ack;
-	int ret;
-
-	WARN_ON((cdclk == 24000) != (vco == 0));
-
-	DRM_DEBUG_DRIVER("Changing CDCLK to %d kHz (VCO %d kHz)\n", cdclk, vco);
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
-				SKL_CDCLK_PREPARE_FOR_CHANGE,
-				SKL_CDCLK_READY_FOR_CHANGE,
-				SKL_CDCLK_READY_FOR_CHANGE, 3);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-	if (ret) {
-		DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
-			  ret);
-		return;
-	}
-
-	/* set CDCLK_CTL */
-	switch (cdclk) {
-	case 450000:
-	case 432000:
-		freq_select = CDCLK_FREQ_450_432;
-		pcu_ack = 1;
-		break;
-	case 540000:
-		freq_select = CDCLK_FREQ_540;
-		pcu_ack = 2;
-		break;
-	case 308571:
-	case 337500:
-	default:
-		freq_select = CDCLK_FREQ_337_308;
-		pcu_ack = 0;
-		break;
-	case 617143:
-	case 675000:
-		freq_select = CDCLK_FREQ_675_617;
-		pcu_ack = 3;
-		break;
-	}
-
-	if (dev_priv->cdclk_pll.vco != 0 &&
-	    dev_priv->cdclk_pll.vco != vco)
-		skl_dpll0_disable(dev_priv);
-
-	if (dev_priv->cdclk_pll.vco != vco)
-		skl_dpll0_enable(dev_priv, vco);
-
-	I915_WRITE(CDCLK_CTL, freq_select | skl_cdclk_decimal(cdclk));
-	POSTING_READ(CDCLK_CTL);
-
-	/* inform PCU of the change */
-	mutex_lock(&dev_priv->rps.hw_lock);
-	sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, pcu_ack);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	intel_update_cdclk(dev_priv);
-}
-
-static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv);
-
-void skl_uninit_cdclk(struct drm_i915_private *dev_priv)
-{
-	skl_set_cdclk(dev_priv, dev_priv->cdclk_pll.ref, 0);
-}
-
-void skl_init_cdclk(struct drm_i915_private *dev_priv)
-{
-	int cdclk, vco;
-
-	skl_sanitize_cdclk(dev_priv);
-
-	if (dev_priv->cdclk_freq != 0 && dev_priv->cdclk_pll.vco != 0) {
-		/*
-		 * Use the current vco as our initial
-		 * guess as to what the preferred vco is.
-		 */
-		if (dev_priv->skl_preferred_vco_freq == 0)
-			skl_set_preferred_cdclk_vco(dev_priv,
-						    dev_priv->cdclk_pll.vco);
-		return;
-	}
-
-	vco = dev_priv->skl_preferred_vco_freq;
-	if (vco == 0)
-		vco = 8100000;
-	cdclk = skl_calc_cdclk(0, vco);
-
-	skl_set_cdclk(dev_priv, cdclk, vco);
-}
-
-static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv)
-{
-	uint32_t cdctl, expected;
-
-	/*
-	 * check if the pre-os intialized the display
-	 * There is SWF18 scratchpad register defined which is set by the
-	 * pre-os which can be used by the OS drivers to check the status
-	 */
-	if ((I915_READ(SWF_ILK(0x18)) & 0x00FFFFFF) == 0)
-		goto sanitize;
-
-	intel_update_cdclk(dev_priv);
-	/* Is PLL enabled and locked ? */
-	if (dev_priv->cdclk_pll.vco == 0 ||
-	    dev_priv->cdclk_freq == dev_priv->cdclk_pll.ref)
-		goto sanitize;
-
-	/* DPLL okay; verify the cdclock
-	 *
-	 * Noticed in some instances that the freq selection is correct but
-	 * decimal part is programmed wrong from BIOS where pre-os does not
-	 * enable display. Verify the same as well.
-	 */
-	cdctl = I915_READ(CDCLK_CTL);
-	expected = (cdctl & CDCLK_FREQ_SEL_MASK) |
-		skl_cdclk_decimal(dev_priv->cdclk_freq);
-	if (cdctl == expected)
-		/* All well; nothing to sanitize */
-		return;
-
-sanitize:
-	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
-
-	/* force cdclk programming */
-	dev_priv->cdclk_freq = 0;
-	/* force full PLL disable + enable */
-	dev_priv->cdclk_pll.vco = -1;
-}
-
-/* Adjust CDclk dividers to allow high res or save power if possible */
-static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
-{
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	u32 val, cmd;
-
-	WARN_ON(dev_priv->display.get_cdclk(dev_priv) != dev_priv->cdclk_freq);
-
-	if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */
-		cmd = 2;
-	else if (cdclk == 266667)
-		cmd = 1;
-	else
-		cmd = 0;
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
-	val &= ~DSPFREQGUAR_MASK;
-	val |= (cmd << DSPFREQGUAR_SHIFT);
-	vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
-	if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) &
-		      DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT),
-		     50)) {
-		DRM_ERROR("timed out waiting for CDclk change\n");
-	}
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	mutex_lock(&dev_priv->sb_lock);
-
-	if (cdclk == 400000) {
-		u32 divider;
-
-		divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1;
-
-		/* adjust cdclk divider */
-		val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL);
-		val &= ~CCK_FREQUENCY_VALUES;
-		val |= divider;
-		vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val);
-
-		if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) &
-			      CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT),
-			     50))
-			DRM_ERROR("timed out waiting for CDclk change\n");
-	}
-
-	/* adjust self-refresh exit latency value */
-	val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC);
-	val &= ~0x7f;
-
-	/*
-	 * For high bandwidth configs, we set a higher latency in the bunit
-	 * so that the core display fetch happens in time to avoid underruns.
-	 */
-	if (cdclk == 400000)
-		val |= 4500 / 250; /* 4.5 usec */
-	else
-		val |= 3000 / 250; /* 3.0 usec */
-	vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val);
-
-	mutex_unlock(&dev_priv->sb_lock);
-
-	intel_update_cdclk(dev_priv);
-}
-
-static void cherryview_set_cdclk(struct drm_device *dev, int cdclk)
-{
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	u32 val, cmd;
-
-	WARN_ON(dev_priv->display.get_cdclk(dev_priv) != dev_priv->cdclk_freq);
-
-	switch (cdclk) {
-	case 333333:
-	case 320000:
-	case 266667:
-	case 200000:
-		break;
-	default:
-		MISSING_CASE(cdclk);
-		return;
-	}
-
-	/*
-	 * Specs are full of misinformation, but testing on actual
-	 * hardware has shown that we just need to write the desired
-	 * CCK divider into the Punit register.
-	 */
-	cmd = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1;
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
-	val &= ~DSPFREQGUAR_MASK_CHV;
-	val |= (cmd << DSPFREQGUAR_SHIFT_CHV);
-	vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
-	if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) &
-		      DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV),
-		     50)) {
-		DRM_ERROR("timed out waiting for CDclk change\n");
-	}
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	intel_update_cdclk(dev_priv);
-}
-
-static int valleyview_calc_cdclk(struct drm_i915_private *dev_priv,
-				 int max_pixclk)
-{
-	int freq_320 = (dev_priv->hpll_freq <<  1) % 320000 != 0 ? 333333 : 320000;
-	int limit = IS_CHERRYVIEW(dev_priv) ? 95 : 90;
-
-	/*
-	 * Really only a few cases to deal with, as only 4 CDclks are supported:
-	 *   200MHz
-	 *   267MHz
-	 *   320/333MHz (depends on HPLL freq)
-	 *   400MHz (VLV only)
-	 * So we check to see whether we're above 90% (VLV) or 95% (CHV)
-	 * of the lower bin and adjust if needed.
-	 *
-	 * We seem to get an unstable or solid color picture at 200MHz.
-	 * Not sure what's wrong. For now use 200MHz only when all pipes
-	 * are off.
-	 */
-	if (!IS_CHERRYVIEW(dev_priv) &&
-	    max_pixclk > freq_320*limit/100)
-		return 400000;
-	else if (max_pixclk > 266667*limit/100)
-		return freq_320;
-	else if (max_pixclk > 0)
-		return 266667;
-	else
-		return 200000;
-}
-
-static int glk_calc_cdclk(int max_pixclk)
-{
-	if (max_pixclk > 2 * 158400)
-		return 316800;
-	else if (max_pixclk > 2 * 79200)
-		return 158400;
-	else
-		return 79200;
-}
-
-static int bxt_calc_cdclk(int max_pixclk)
-{
-	if (max_pixclk > 576000)
-		return 624000;
-	else if (max_pixclk > 384000)
-		return 576000;
-	else if (max_pixclk > 288000)
-		return 384000;
-	else if (max_pixclk > 144000)
-		return 288000;
-	else
-		return 144000;
-}
-
-static int valleyview_modeset_calc_cdclk(struct drm_atomic_state *state)
-{
-	struct drm_device *dev = state->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	int max_pixclk = intel_max_pixel_rate(state);
-	struct intel_atomic_state *intel_state =
-		to_intel_atomic_state(state);
-
-	intel_state->cdclk = intel_state->dev_cdclk =
-		valleyview_calc_cdclk(dev_priv, max_pixclk);
-
-	if (!intel_state->active_crtcs)
-		intel_state->dev_cdclk = valleyview_calc_cdclk(dev_priv, 0);
-
-	return 0;
-}
-
-static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
-{
-	struct drm_i915_private *dev_priv = to_i915(state->dev);
-	int max_pixclk = intel_max_pixel_rate(state);
-	struct intel_atomic_state *intel_state =
-		to_intel_atomic_state(state);
-	int cdclk;
-
-	if (IS_GEMINILAKE(dev_priv))
-		cdclk = glk_calc_cdclk(max_pixclk);
-	else
-		cdclk = bxt_calc_cdclk(max_pixclk);
-
-	intel_state->cdclk = intel_state->dev_cdclk = cdclk;
-
-	if (!intel_state->active_crtcs) {
-		if (IS_GEMINILAKE(dev_priv))
-			cdclk = glk_calc_cdclk(0);
-		else
-			cdclk = bxt_calc_cdclk(0);
-
-		intel_state->dev_cdclk = cdclk;
-	}
-
-	return 0;
-}
-
-static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv)
-{
-	unsigned int credits, default_credits;
-
-	if (IS_CHERRYVIEW(dev_priv))
-		default_credits = PFI_CREDIT(12);
-	else
-		default_credits = PFI_CREDIT(8);
-
-	if (dev_priv->cdclk_freq >= dev_priv->czclk_freq) {
-		/* CHV suggested value is 31 or 63 */
-		if (IS_CHERRYVIEW(dev_priv))
-			credits = PFI_CREDIT_63;
-		else
-			credits = PFI_CREDIT(15);
-	} else {
-		credits = default_credits;
-	}
-
-	/*
-	 * WA - write default credits before re-programming
-	 * FIXME: should we also set the resend bit here?
-	 */
-	I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE |
-		   default_credits);
-
-	I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE |
-		   credits | PFI_CREDIT_RESEND);
-
-	/*
-	 * FIXME is this guaranteed to clear
-	 * immediately or should we poll for it?
-	 */
-	WARN_ON(I915_READ(GCI_CONTROL) & PFI_CREDIT_RESEND);
-}
-
-static void valleyview_modeset_commit_cdclk(struct drm_atomic_state *old_state)
-{
-	struct drm_device *dev = old_state->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_atomic_state *old_intel_state =
-		to_intel_atomic_state(old_state);
-	unsigned req_cdclk = old_intel_state->dev_cdclk;
-
-	/*
-	 * FIXME: We can end up here with all power domains off, yet
-	 * with a CDCLK frequency other than the minimum. To account
-	 * for this take the PIPE-A power domain, which covers the HW
-	 * blocks needed for the following programming. This can be
-	 * removed once it's guaranteed that we get here either with
-	 * the minimum CDCLK set, or the required power domains
-	 * enabled.
-	 */
-	intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
-
-	if (IS_CHERRYVIEW(dev_priv))
-		cherryview_set_cdclk(dev, req_cdclk);
-	else
-		valleyview_set_cdclk(dev, req_cdclk);
-
-	vlv_program_pfi_credits(dev_priv);
-
-	intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A);
-}
-
-static void valleyview_crtc_enable(struct intel_crtc_state *pipe_config,
-				   struct drm_atomic_state *old_state)
-{
-	struct drm_crtc *crtc = pipe_config->base.crtc;
-	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	int pipe = intel_crtc->pipe;
-
-	if (WARN_ON(intel_crtc->active))
-		return;
-
-	if (intel_crtc_has_dp_encoder(intel_crtc->config))
-		intel_dp_set_m_n(intel_crtc, M1_N1);
-
-	intel_set_pipe_timings(intel_crtc);
-	intel_set_pipe_src_size(intel_crtc);
-
-	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B) {
-		struct drm_i915_private *dev_priv = to_i915(dev);
-
-		I915_WRITE(CHV_BLEND(pipe), CHV_BLEND_LEGACY);
-		I915_WRITE(CHV_CANVAS(pipe), 0);
-	}
-
-	i9xx_set_pipeconf(intel_crtc);
-
-	intel_crtc->active = true;
-
-	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
-
-	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
-
-	if (IS_CHERRYVIEW(dev_priv)) {
-		chv_prepare_pll(intel_crtc, intel_crtc->config);
-		chv_enable_pll(intel_crtc, intel_crtc->config);
-	} else {
-		vlv_prepare_pll(intel_crtc, intel_crtc->config);
-		vlv_enable_pll(intel_crtc, intel_crtc->config);
-	}
-
-	intel_encoders_pre_enable(crtc, pipe_config, old_state);
-
-	i9xx_pfit_enable(intel_crtc);
-
-	intel_color_load_luts(&pipe_config->base);
-
-	intel_update_watermarks(intel_crtc);
-	intel_enable_pipe(intel_crtc);
-
-	assert_vblank_disabled(crtc);
-	drm_crtc_vblank_on(crtc);
-
-	intel_encoders_enable(crtc, pipe_config, old_state);
-}
-
-static void i9xx_set_pll_dividers(struct intel_crtc *crtc)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-
-	I915_WRITE(FP0(crtc->pipe), crtc->config->dpll_hw_state.fp0);
-	I915_WRITE(FP1(crtc->pipe), crtc->config->dpll_hw_state.fp1);
-}
-
-static void i9xx_crtc_enable(struct intel_crtc_state *pipe_config,
-			     struct drm_atomic_state *old_state)
-{
-	struct drm_crtc *crtc = pipe_config->base.crtc;
-	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	enum pipe pipe = intel_crtc->pipe;
-
-	if (WARN_ON(intel_crtc->active))
-		return;
-
-	i9xx_set_pll_dividers(intel_crtc);
-
-	if (intel_crtc_has_dp_encoder(intel_crtc->config))
-		intel_dp_set_m_n(intel_crtc, M1_N1);
-
-	intel_set_pipe_timings(intel_crtc);
-	intel_set_pipe_src_size(intel_crtc);
-
-	i9xx_set_pipeconf(intel_crtc);
-
-	intel_crtc->active = true;
-
-	if (!IS_GEN2(dev_priv))
-		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
-
-	intel_encoders_pre_enable(crtc, pipe_config, old_state);
-
-	i9xx_enable_pll(intel_crtc);
-
-	i9xx_pfit_enable(intel_crtc);
-
-	intel_color_load_luts(&pipe_config->base);
-
-	intel_update_watermarks(intel_crtc);
-	intel_enable_pipe(intel_crtc);
-
-	assert_vblank_disabled(crtc);
-	drm_crtc_vblank_on(crtc);
-
-	intel_encoders_enable(crtc, pipe_config, old_state);
-}
-
-static void i9xx_pfit_disable(struct intel_crtc *crtc)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-
-	if (!crtc->config->gmch_pfit.control)
-		return;
-
-	assert_pipe_disabled(dev_priv, crtc->pipe);
-
-	DRM_DEBUG_DRIVER("disabling pfit, current: 0x%08x\n",
-			 I915_READ(PFIT_CONTROL));
-	I915_WRITE(PFIT_CONTROL, 0);
-}
-
-static void i9xx_crtc_disable(struct intel_crtc_state *old_crtc_state,
-			      struct drm_atomic_state *old_state)
-{
-	struct drm_crtc *crtc = old_crtc_state->base.crtc;
-	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	int pipe = intel_crtc->pipe;
-
-	/*
-	 * On gen2 planes are double buffered but the pipe isn't, so we must
-	 * wait for planes to fully turn off before disabling the pipe.
-	 */
-	if (IS_GEN2(dev_priv))
-		intel_wait_for_vblank(dev_priv, pipe);
-
-	intel_encoders_disable(crtc, old_crtc_state, old_state);
-
-	drm_crtc_vblank_off(crtc);
-	assert_vblank_disabled(crtc);
-
-	intel_disable_pipe(intel_crtc);
-
-	i9xx_pfit_disable(intel_crtc);
-
-	intel_encoders_post_disable(crtc, old_crtc_state, old_state);
-
-	if (!intel_crtc_has_type(intel_crtc->config, INTEL_OUTPUT_DSI)) {
-		if (IS_CHERRYVIEW(dev_priv))
-			chv_disable_pll(dev_priv, pipe);
-		else if (IS_VALLEYVIEW(dev_priv))
-			vlv_disable_pll(dev_priv, pipe);
-		else
-			i9xx_disable_pll(intel_crtc);
-	}
-
-	intel_encoders_post_pll_disable(crtc, old_crtc_state, old_state);
-
-	if (!IS_GEN2(dev_priv))
-		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
-}
-
-static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
-{
-	struct intel_encoder *encoder;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
-	enum intel_display_power_domain domain;
-	unsigned long domains;
-	struct drm_atomic_state *state;
-	struct intel_crtc_state *crtc_state;
-	int ret;
-
-	if (!intel_crtc->active)
-		return;
-
-	if (crtc->primary->state->visible) {
-		WARN_ON(intel_crtc->flip_work);
-
-		intel_pre_disable_primary_noatomic(crtc);
-
-		intel_crtc_disable_planes(crtc, 1 << drm_plane_index(crtc->primary));
-		crtc->primary->state->visible = false;
-	}
-
-	state = drm_atomic_state_alloc(crtc->dev);
-	if (!state) {
-		DRM_DEBUG_KMS("failed to disable [CRTC:%d:%s], out of memory",
-			      crtc->base.id, crtc->name);
-		return;
-	}
-
-	state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
+	state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
 
 	/* Everything's already locked, -EDEADLK can't happen. */
 	crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
@@ -7147,546 +6205,104 @@ static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv,
 		return true;
 
 	/*
-	 * We compare against max which means we must take
-	 * the increased cdclk requirement into account when
-	 * calculating the new cdclk.
-	 *
-	 * Should measure whether using a lower cdclk w/o IPS
-	 */
-	return pipe_config->pixel_rate <=
-		dev_priv->max_cdclk_freq * 95 / 100;
-}
-
-static void hsw_compute_ips_config(struct intel_crtc *crtc,
-				   struct intel_crtc_state *pipe_config)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-
-	pipe_config->ips_enabled = i915.enable_ips &&
-		hsw_crtc_supports_ips(crtc) &&
-		pipe_config_supports_ips(dev_priv, pipe_config);
-}
-
-static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
-{
-	const struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-
-	/* GDG double wide on either pipe, otherwise pipe A only */
-	return INTEL_INFO(dev_priv)->gen < 4 &&
-		(crtc->pipe == PIPE_A || IS_I915G(dev_priv));
-}
-
-static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
-{
-	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
-
-	if (HAS_GMCH_DISPLAY(dev_priv))
-		/* FIXME calculate proper pipe pixel rate for GMCH pfit */
-		crtc_state->pixel_rate =
-			crtc_state->base.adjusted_mode.crtc_clock;
-	else
-		crtc_state->pixel_rate =
-			ilk_pipe_pixel_rate(crtc_state);
-}
-
-static int intel_crtc_compute_config(struct intel_crtc *crtc,
-				     struct intel_crtc_state *pipe_config)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
-	int clock_limit = dev_priv->max_dotclk_freq;
-
-	if (INTEL_GEN(dev_priv) < 4) {
-		clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
-
-		/*
-		 * Enable double wide mode when the dot clock
-		 * is > 90% of the (display) core speed.
-		 */
-		if (intel_crtc_supports_double_wide(crtc) &&
-		    adjusted_mode->crtc_clock > clock_limit) {
-			clock_limit = dev_priv->max_dotclk_freq;
-			pipe_config->double_wide = true;
-		}
-	}
-
-	if (adjusted_mode->crtc_clock > clock_limit) {
-		DRM_DEBUG_KMS("requested pixel clock (%d kHz) too high (max: %d kHz, double wide: %s)\n",
-			      adjusted_mode->crtc_clock, clock_limit,
-			      yesno(pipe_config->double_wide));
-		return -EINVAL;
-	}
-
-	/*
-	 * Pipe horizontal size must be even in:
-	 * - DVO ganged mode
-	 * - LVDS dual channel mode
-	 * - Double wide pipe
-	 */
-	if ((intel_crtc_has_type(pipe_config, INTEL_OUTPUT_LVDS) &&
-	     intel_is_dual_link_lvds(dev)) || pipe_config->double_wide)
-		pipe_config->pipe_src_w &= ~1;
-
-	/* Cantiga+ cannot handle modes with a hsync front porch of 0.
-	 * WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.
-	 */
-	if ((INTEL_GEN(dev_priv) > 4 || IS_G4X(dev_priv)) &&
-		adjusted_mode->crtc_hsync_start == adjusted_mode->crtc_hdisplay)
-		return -EINVAL;
-
-	intel_crtc_compute_pixel_rate(pipe_config);
-
-	if (HAS_IPS(dev_priv))
-		hsw_compute_ips_config(crtc, pipe_config);
-
-	if (pipe_config->has_pch_encoder)
-		return ironlake_fdi_compute_config(crtc, pipe_config);
-
-	return 0;
-}
-
-static int skylake_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	u32 cdctl;
-
-	skl_dpll0_update(dev_priv);
-
-	if (dev_priv->cdclk_pll.vco == 0)
-		return dev_priv->cdclk_pll.ref;
-
-	cdctl = I915_READ(CDCLK_CTL);
-
-	if (dev_priv->cdclk_pll.vco == 8640000) {
-		switch (cdctl & CDCLK_FREQ_SEL_MASK) {
-		case CDCLK_FREQ_450_432:
-			return 432000;
-		case CDCLK_FREQ_337_308:
-			return 308571;
-		case CDCLK_FREQ_540:
-			return 540000;
-		case CDCLK_FREQ_675_617:
-			return 617143;
-		default:
-			MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK);
-		}
-	} else {
-		switch (cdctl & CDCLK_FREQ_SEL_MASK) {
-		case CDCLK_FREQ_450_432:
-			return 450000;
-		case CDCLK_FREQ_337_308:
-			return 337500;
-		case CDCLK_FREQ_540:
-			return 540000;
-		case CDCLK_FREQ_675_617:
-			return 675000;
-		default:
-			MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK);
-		}
-	}
-
-	return dev_priv->cdclk_pll.ref;
-}
-
-static void bxt_de_pll_update(struct drm_i915_private *dev_priv)
-{
-	u32 val;
-
-	dev_priv->cdclk_pll.ref = 19200;
-	dev_priv->cdclk_pll.vco = 0;
-
-	val = I915_READ(BXT_DE_PLL_ENABLE);
-	if ((val & BXT_DE_PLL_PLL_ENABLE) == 0)
-		return;
-
-	if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0))
-		return;
-
-	val = I915_READ(BXT_DE_PLL_CTL);
-	dev_priv->cdclk_pll.vco = (val & BXT_DE_PLL_RATIO_MASK) *
-		dev_priv->cdclk_pll.ref;
-}
-
-static int broxton_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	u32 divider;
-	int div, vco;
-
-	bxt_de_pll_update(dev_priv);
-
-	vco = dev_priv->cdclk_pll.vco;
-	if (vco == 0)
-		return dev_priv->cdclk_pll.ref;
-
-	divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK;
-
-	switch (divider) {
-	case BXT_CDCLK_CD2X_DIV_SEL_1:
-		div = 2;
-		break;
-	case BXT_CDCLK_CD2X_DIV_SEL_1_5:
-		WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
-		div = 3;
-		break;
-	case BXT_CDCLK_CD2X_DIV_SEL_2:
-		div = 4;
-		break;
-	case BXT_CDCLK_CD2X_DIV_SEL_4:
-		div = 8;
-		break;
-	default:
-		MISSING_CASE(divider);
-		return dev_priv->cdclk_pll.ref;
-	}
-
-	return DIV_ROUND_CLOSEST(vco, div);
-}
-
-static int broadwell_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	uint32_t lcpll = I915_READ(LCPLL_CTL);
-	uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK;
-
-	if (lcpll & LCPLL_CD_SOURCE_FCLK)
-		return 800000;
-	else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
-		return 450000;
-	else if (freq == LCPLL_CLK_FREQ_450)
-		return 450000;
-	else if (freq == LCPLL_CLK_FREQ_54O_BDW)
-		return 540000;
-	else if (freq == LCPLL_CLK_FREQ_337_5_BDW)
-		return 337500;
-	else
-		return 675000;
-}
-
-static int haswell_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	uint32_t lcpll = I915_READ(LCPLL_CTL);
-	uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK;
-
-	if (lcpll & LCPLL_CD_SOURCE_FCLK)
-		return 800000;
-	else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
-		return 450000;
-	else if (freq == LCPLL_CLK_FREQ_450)
-		return 450000;
-	else if (IS_HSW_ULT(dev_priv))
-		return 337500;
-	else
-		return 540000;
-}
-
-static int valleyview_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	return vlv_get_cck_clock_hpll(dev_priv, "cdclk",
-				      CCK_DISPLAY_CLOCK_CONTROL);
-}
-
-static int fixed_450mhz_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	return 450000;
-}
-
-static int fixed_400mhz_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	return 400000;
-}
-
-static int i945gm_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	u16 gcfgc = 0;
-
-	pci_read_config_word(pdev, GCFGC, &gcfgc);
-
-	if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
-		return 133333;
-	else {
-		switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
-		case GC_DISPLAY_CLOCK_333_320_MHZ:
-			return 320000;
-		default:
-		case GC_DISPLAY_CLOCK_190_200_MHZ:
-			return 200000;
-		}
-	}
-}
-
-static int fixed_333mhz_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	return 333333;
-}
-
-static int fixed_200mhz_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	return 200000;
-}
-
-static int pnv_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	u16 gcfgc = 0;
-
-	pci_read_config_word(pdev, GCFGC, &gcfgc);
-
-	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
-	case GC_DISPLAY_CLOCK_267_MHZ_PNV:
-		return 266667;
-	case GC_DISPLAY_CLOCK_333_MHZ_PNV:
-		return 333333;
-	case GC_DISPLAY_CLOCK_444_MHZ_PNV:
-		return 444444;
-	case GC_DISPLAY_CLOCK_200_MHZ_PNV:
-		return 200000;
-	default:
-		DRM_ERROR("Unknown pnv display core clock 0x%04x\n", gcfgc);
-	case GC_DISPLAY_CLOCK_133_MHZ_PNV:
-		return 133333;
-	case GC_DISPLAY_CLOCK_167_MHZ_PNV:
-		return 166667;
-	}
-}
-
-static int i915gm_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	u16 gcfgc = 0;
-
-	pci_read_config_word(pdev, GCFGC, &gcfgc);
-
-	if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
-		return 133333;
-	else {
-		switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
-		case GC_DISPLAY_CLOCK_333_320_MHZ:
-			return 333333;
-		default:
-		case GC_DISPLAY_CLOCK_190_200_MHZ:
-			return 190000;
-		}
-	}
-}
-
-static int fixed_266mhz_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	return 266667;
-}
-
-static int i85x_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	u16 hpllcc = 0;
-
-	/*
-	 * 852GM/852GMV only supports 133 MHz and the HPLLCC
-	 * encoding is different :(
-	 * FIXME is this the right way to detect 852GM/852GMV?
-	 */
-	if (pdev->revision == 0x1)
-		return 133333;
-
-	pci_bus_read_config_word(pdev->bus,
-				 PCI_DEVFN(0, 3), HPLLCC, &hpllcc);
-
-	/* Assume that the hardware is in the high speed state.  This
-	 * should be the default.
+	 * We compare against max which means we must take
+	 * the increased cdclk requirement into account when
+	 * calculating the new cdclk.
+	 *
+	 * Should measure whether using a lower cdclk w/o IPS
 	 */
-	switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
-	case GC_CLOCK_133_200:
-	case GC_CLOCK_133_200_2:
-	case GC_CLOCK_100_200:
-		return 200000;
-	case GC_CLOCK_166_250:
-		return 250000;
-	case GC_CLOCK_100_133:
-		return 133333;
-	case GC_CLOCK_133_266:
-	case GC_CLOCK_133_266_2:
-	case GC_CLOCK_166_266:
-		return 266667;
-	}
-
-	/* Shouldn't happen */
-	return 0;
+	return pipe_config->pixel_rate <=
+		dev_priv->max_cdclk_freq * 95 / 100;
 }
 
-static int fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv)
+static void hsw_compute_ips_config(struct intel_crtc *crtc,
+				   struct intel_crtc_state *pipe_config)
 {
-	return 133333;
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	pipe_config->ips_enabled = i915.enable_ips &&
+		hsw_crtc_supports_ips(crtc) &&
+		pipe_config_supports_ips(dev_priv, pipe_config);
 }
 
-static unsigned int intel_hpll_vco(struct drm_i915_private *dev_priv)
+static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
 {
-	static const unsigned int blb_vco[8] = {
-		[0] = 3200000,
-		[1] = 4000000,
-		[2] = 5333333,
-		[3] = 4800000,
-		[4] = 6400000,
-	};
-	static const unsigned int pnv_vco[8] = {
-		[0] = 3200000,
-		[1] = 4000000,
-		[2] = 5333333,
-		[3] = 4800000,
-		[4] = 2666667,
-	};
-	static const unsigned int cl_vco[8] = {
-		[0] = 3200000,
-		[1] = 4000000,
-		[2] = 5333333,
-		[3] = 6400000,
-		[4] = 3333333,
-		[5] = 3566667,
-		[6] = 4266667,
-	};
-	static const unsigned int elk_vco[8] = {
-		[0] = 3200000,
-		[1] = 4000000,
-		[2] = 5333333,
-		[3] = 4800000,
-	};
-	static const unsigned int ctg_vco[8] = {
-		[0] = 3200000,
-		[1] = 4000000,
-		[2] = 5333333,
-		[3] = 6400000,
-		[4] = 2666667,
-		[5] = 4266667,
-	};
-	const unsigned int *vco_table;
-	unsigned int vco;
-	uint8_t tmp = 0;
-
-	/* FIXME other chipsets? */
-	if (IS_GM45(dev_priv))
-		vco_table = ctg_vco;
-	else if (IS_G4X(dev_priv))
-		vco_table = elk_vco;
-	else if (IS_I965GM(dev_priv))
-		vco_table = cl_vco;
-	else if (IS_PINEVIEW(dev_priv))
-		vco_table = pnv_vco;
-	else if (IS_G33(dev_priv))
-		vco_table = blb_vco;
-	else
-		return 0;
-
-	tmp = I915_READ(IS_MOBILE(dev_priv) ? HPLLVCO_MOBILE : HPLLVCO);
-
-	vco = vco_table[tmp & 0x7];
-	if (vco == 0)
-		DRM_ERROR("Bad HPLL VCO (HPLLVCO=0x%02x)\n", tmp);
-	else
-		DRM_DEBUG_KMS("HPLL VCO %u kHz\n", vco);
+	const struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 
-	return vco;
+	/* GDG double wide on either pipe, otherwise pipe A only */
+	return INTEL_INFO(dev_priv)->gen < 4 &&
+		(crtc->pipe == PIPE_A || IS_I915G(dev_priv));
 }
 
-static int gm45_get_cdclk(struct drm_i915_private *dev_priv)
+static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
 {
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	unsigned int cdclk_sel, vco = intel_hpll_vco(dev_priv);
-	uint16_t tmp = 0;
-
-	pci_read_config_word(pdev, GCFGC, &tmp);
-
-	cdclk_sel = (tmp >> 12) & 0x1;
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
 
-	switch (vco) {
-	case 2666667:
-	case 4000000:
-	case 5333333:
-		return cdclk_sel ? 333333 : 222222;
-	case 3200000:
-		return cdclk_sel ? 320000 : 228571;
-	default:
-		DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n", vco, tmp);
-		return 222222;
-	}
+	if (HAS_GMCH_DISPLAY(dev_priv))
+		/* FIXME calculate proper pipe pixel rate for GMCH pfit */
+		crtc_state->pixel_rate =
+			crtc_state->base.adjusted_mode.crtc_clock;
+	else
+		crtc_state->pixel_rate =
+			ilk_pipe_pixel_rate(crtc_state);
 }
 
-static int i965gm_get_cdclk(struct drm_i915_private *dev_priv)
+static int intel_crtc_compute_config(struct intel_crtc *crtc,
+				     struct intel_crtc_state *pipe_config)
 {
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	static const uint8_t div_3200[] = { 16, 10,  8 };
-	static const uint8_t div_4000[] = { 20, 12, 10 };
-	static const uint8_t div_5333[] = { 24, 16, 14 };
-	const uint8_t *div_table;
-	unsigned int cdclk_sel, vco = intel_hpll_vco(dev_priv);
-	uint16_t tmp = 0;
-
-	pci_read_config_word(pdev, GCFGC, &tmp);
-
-	cdclk_sel = ((tmp >> 8) & 0x1f) - 1;
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
+	int clock_limit = dev_priv->max_dotclk_freq;
 
-	if (cdclk_sel >= ARRAY_SIZE(div_3200))
-		goto fail;
+	if (INTEL_GEN(dev_priv) < 4) {
+		clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
 
-	switch (vco) {
-	case 3200000:
-		div_table = div_3200;
-		break;
-	case 4000000:
-		div_table = div_4000;
-		break;
-	case 5333333:
-		div_table = div_5333;
-		break;
-	default:
-		goto fail;
+		/*
+		 * Enable double wide mode when the dot clock
+		 * is > 90% of the (display) core speed.
+		 */
+		if (intel_crtc_supports_double_wide(crtc) &&
+		    adjusted_mode->crtc_clock > clock_limit) {
+			clock_limit = dev_priv->max_dotclk_freq;
+			pipe_config->double_wide = true;
+		}
 	}
 
-	return DIV_ROUND_CLOSEST(vco, div_table[cdclk_sel]);
-
-fail:
-	DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n", vco, tmp);
-	return 200000;
-}
-
-static int g33_get_cdclk(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	static const uint8_t div_3200[] = { 12, 10,  8,  7, 5, 16 };
-	static const uint8_t div_4000[] = { 14, 12, 10,  8, 6, 20 };
-	static const uint8_t div_4800[] = { 20, 14, 12, 10, 8, 24 };
-	static const uint8_t div_5333[] = { 20, 16, 12, 12, 8, 28 };
-	const uint8_t *div_table;
-	unsigned int cdclk_sel, vco = intel_hpll_vco(dev_priv);
-	uint16_t tmp = 0;
+	if (adjusted_mode->crtc_clock > clock_limit) {
+		DRM_DEBUG_KMS("requested pixel clock (%d kHz) too high (max: %d kHz, double wide: %s)\n",
+			      adjusted_mode->crtc_clock, clock_limit,
+			      yesno(pipe_config->double_wide));
+		return -EINVAL;
+	}
 
-	pci_read_config_word(pdev, GCFGC, &tmp);
+	/*
+	 * Pipe horizontal size must be even in:
+	 * - DVO ganged mode
+	 * - LVDS dual channel mode
+	 * - Double wide pipe
+	 */
+	if ((intel_crtc_has_type(pipe_config, INTEL_OUTPUT_LVDS) &&
+	     intel_is_dual_link_lvds(dev)) || pipe_config->double_wide)
+		pipe_config->pipe_src_w &= ~1;
 
-	cdclk_sel = (tmp >> 4) & 0x7;
+	/* Cantiga+ cannot handle modes with a hsync front porch of 0.
+	 * WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.
+	 */
+	if ((INTEL_GEN(dev_priv) > 4 || IS_G4X(dev_priv)) &&
+		adjusted_mode->crtc_hsync_start == adjusted_mode->crtc_hdisplay)
+		return -EINVAL;
 
-	if (cdclk_sel >= ARRAY_SIZE(div_3200))
-		goto fail;
+	intel_crtc_compute_pixel_rate(pipe_config);
 
-	switch (vco) {
-	case 3200000:
-		div_table = div_3200;
-		break;
-	case 4000000:
-		div_table = div_4000;
-		break;
-	case 4800000:
-		div_table = div_4800;
-		break;
-	case 5333333:
-		div_table = div_5333;
-		break;
-	default:
-		goto fail;
-	}
+	if (HAS_IPS(dev_priv))
+		hsw_compute_ips_config(crtc, pipe_config);
 
-	return DIV_ROUND_CLOSEST(vco, div_table[cdclk_sel]);
+	if (pipe_config->has_pch_encoder)
+		return ironlake_fdi_compute_config(crtc, pipe_config);
 
-fail:
-	DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n", vco, tmp);
-	return 190476;
+	return 0;
 }
 
 static void
@@ -10250,245 +8866,6 @@ void hsw_disable_pc8(struct drm_i915_private *dev_priv)
 	}
 }
 
-static void bxt_modeset_commit_cdclk(struct drm_atomic_state *old_state)
-{
-	struct drm_device *dev = old_state->dev;
-	struct intel_atomic_state *old_intel_state =
-		to_intel_atomic_state(old_state);
-	unsigned int req_cdclk = old_intel_state->dev_cdclk;
-
-	bxt_set_cdclk(to_i915(dev), req_cdclk);
-}
-
-static int bdw_adjust_min_pipe_pixel_rate(struct intel_crtc_state *crtc_state,
-					  int pixel_rate)
-{
-	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
-
-	/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
-	if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
-		pixel_rate = DIV_ROUND_UP(pixel_rate * 100, 95);
-
-	/* BSpec says "Do not use DisplayPort with CDCLK less than
-	 * 432 MHz, audio enabled, port width x4, and link rate
-	 * HBR2 (5.4 GHz), or else there may be audio corruption or
-	 * screen corruption."
-	 */
-	if (intel_crtc_has_dp_encoder(crtc_state) &&
-	    crtc_state->has_audio &&
-	    crtc_state->port_clock >= 540000 &&
-	    crtc_state->lane_count == 4)
-		pixel_rate = max(432000, pixel_rate);
-
-	return pixel_rate;
-}
-
-/* compute the max rate for new configuration */
-static int intel_max_pixel_rate(struct drm_atomic_state *state)
-{
-	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
-	struct drm_i915_private *dev_priv = to_i915(state->dev);
-	struct drm_crtc *crtc;
-	struct drm_crtc_state *cstate;
-	struct intel_crtc_state *crtc_state;
-	unsigned max_pixel_rate = 0, i;
-	enum pipe pipe;
-
-	memcpy(intel_state->min_pixclk, dev_priv->min_pixclk,
-	       sizeof(intel_state->min_pixclk));
-
-	for_each_crtc_in_state(state, crtc, cstate, i) {
-		int pixel_rate;
-
-		crtc_state = to_intel_crtc_state(cstate);
-		if (!crtc_state->base.enable) {
-			intel_state->min_pixclk[i] = 0;
-			continue;
-		}
-
-		pixel_rate = crtc_state->pixel_rate;
-
-		if (IS_BROADWELL(dev_priv) || IS_GEN9(dev_priv))
-			pixel_rate = bdw_adjust_min_pipe_pixel_rate(crtc_state,
-								    pixel_rate);
-
-		intel_state->min_pixclk[i] = pixel_rate;
-	}
-
-	for_each_pipe(dev_priv, pipe)
-		max_pixel_rate = max(intel_state->min_pixclk[pipe], max_pixel_rate);
-
-	return max_pixel_rate;
-}
-
-static void broadwell_set_cdclk(struct drm_device *dev, int cdclk)
-{
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	uint32_t val, data;
-	int ret;
-
-	if (WARN((I915_READ(LCPLL_CTL) &
-		  (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK |
-		   LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE |
-		   LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW |
-		   LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK,
-		 "trying to change cdclk frequency with cdclk not enabled\n"))
-		return;
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = sandybridge_pcode_write(dev_priv,
-				      BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-	if (ret) {
-		DRM_ERROR("failed to inform pcode about cdclk change\n");
-		return;
-	}
-
-	val = I915_READ(LCPLL_CTL);
-	val |= LCPLL_CD_SOURCE_FCLK;
-	I915_WRITE(LCPLL_CTL, val);
-
-	if (wait_for_us(I915_READ(LCPLL_CTL) &
-			LCPLL_CD_SOURCE_FCLK_DONE, 1))
-		DRM_ERROR("Switching to FCLK failed\n");
-
-	val = I915_READ(LCPLL_CTL);
-	val &= ~LCPLL_CLK_FREQ_MASK;
-
-	switch (cdclk) {
-	case 450000:
-		val |= LCPLL_CLK_FREQ_450;
-		data = 0;
-		break;
-	case 540000:
-		val |= LCPLL_CLK_FREQ_54O_BDW;
-		data = 1;
-		break;
-	case 337500:
-		val |= LCPLL_CLK_FREQ_337_5_BDW;
-		data = 2;
-		break;
-	case 675000:
-		val |= LCPLL_CLK_FREQ_675_BDW;
-		data = 3;
-		break;
-	default:
-		WARN(1, "invalid cdclk frequency\n");
-		return;
-	}
-
-	I915_WRITE(LCPLL_CTL, val);
-
-	val = I915_READ(LCPLL_CTL);
-	val &= ~LCPLL_CD_SOURCE_FCLK;
-	I915_WRITE(LCPLL_CTL, val);
-
-	if (wait_for_us((I915_READ(LCPLL_CTL) &
-			LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
-		DRM_ERROR("Switching back to LCPLL failed\n");
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, data);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1);
-
-	intel_update_cdclk(dev_priv);
-
-	WARN(cdclk != dev_priv->cdclk_freq,
-	     "cdclk requested %d kHz but got %d kHz\n",
-	     cdclk, dev_priv->cdclk_freq);
-}
-
-static int broadwell_calc_cdclk(int max_pixclk)
-{
-	if (max_pixclk > 540000)
-		return 675000;
-	else if (max_pixclk > 450000)
-		return 540000;
-	else if (max_pixclk > 337500)
-		return 450000;
-	else
-		return 337500;
-}
-
-static int broadwell_modeset_calc_cdclk(struct drm_atomic_state *state)
-{
-	struct drm_i915_private *dev_priv = to_i915(state->dev);
-	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
-	int max_pixclk = intel_max_pixel_rate(state);
-	int cdclk;
-
-	/*
-	 * FIXME should also account for plane ratio
-	 * once 64bpp pixel formats are supported.
-	 */
-	cdclk = broadwell_calc_cdclk(max_pixclk);
-
-	if (cdclk > dev_priv->max_cdclk_freq) {
-		DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
-			      cdclk, dev_priv->max_cdclk_freq);
-		return -EINVAL;
-	}
-
-	intel_state->cdclk = intel_state->dev_cdclk = cdclk;
-	if (!intel_state->active_crtcs)
-		intel_state->dev_cdclk = broadwell_calc_cdclk(0);
-
-	return 0;
-}
-
-static void broadwell_modeset_commit_cdclk(struct drm_atomic_state *old_state)
-{
-	struct drm_device *dev = old_state->dev;
-	struct intel_atomic_state *old_intel_state =
-		to_intel_atomic_state(old_state);
-	unsigned req_cdclk = old_intel_state->dev_cdclk;
-
-	broadwell_set_cdclk(dev, req_cdclk);
-}
-
-static int skl_modeset_calc_cdclk(struct drm_atomic_state *state)
-{
-	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
-	struct drm_i915_private *dev_priv = to_i915(state->dev);
-	const int max_pixclk = intel_max_pixel_rate(state);
-	int vco = intel_state->cdclk_pll_vco;
-	int cdclk;
-
-	/*
-	 * FIXME should also account for plane ratio
-	 * once 64bpp pixel formats are supported.
-	 */
-	cdclk = skl_calc_cdclk(max_pixclk, vco);
-
-	/*
-	 * FIXME move the cdclk caclulation to
-	 * compute_config() so we can fail gracegully.
-	 */
-	if (cdclk > dev_priv->max_cdclk_freq) {
-		DRM_ERROR("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
-			  cdclk, dev_priv->max_cdclk_freq);
-		cdclk = dev_priv->max_cdclk_freq;
-	}
-
-	intel_state->cdclk = intel_state->dev_cdclk = cdclk;
-	if (!intel_state->active_crtcs)
-		intel_state->dev_cdclk = skl_calc_cdclk(0, vco);
-
-	return 0;
-}
-
-static void skl_modeset_commit_cdclk(struct drm_atomic_state *old_state)
-{
-	struct drm_i915_private *dev_priv = to_i915(old_state->dev);
-	struct intel_atomic_state *intel_state = to_intel_atomic_state(old_state);
-	unsigned int req_cdclk = intel_state->dev_cdclk;
-	unsigned int req_vco = intel_state->cdclk_pll_vco;
-
-	skl_set_cdclk(dev_priv, req_cdclk, req_vco);
-}
-
 static int haswell_crtc_compute_clock(struct intel_crtc *crtc,
 				      struct intel_crtc_state *crtc_state)
 {
@@ -16170,6 +14547,8 @@ static const struct drm_mode_config_funcs intel_mode_funcs = {
  */
 void intel_init_display_hooks(struct drm_i915_private *dev_priv)
 {
+	intel_init_cdclk_hooks(dev_priv);
+
 	if (INTEL_INFO(dev_priv)->gen >= 9) {
 		dev_priv->display.get_pipe_config = haswell_get_pipe_config;
 		dev_priv->display.get_initial_plane_config =
@@ -16238,52 +14617,6 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
 		dev_priv->display.crtc_disable = i9xx_crtc_disable;
 	}
 
-	/* Returns the core display clock speed */
-	if (IS_GEN9_BC(dev_priv))
-		dev_priv->display.get_cdclk = skylake_get_cdclk;
-	else if (IS_GEN9_LP(dev_priv))
-		dev_priv->display.get_cdclk = broxton_get_cdclk;
-	else if (IS_BROADWELL(dev_priv))
-		dev_priv->display.get_cdclk = broadwell_get_cdclk;
-	else if (IS_HASWELL(dev_priv))
-		dev_priv->display.get_cdclk = haswell_get_cdclk;
-	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		dev_priv->display.get_cdclk = valleyview_get_cdclk;
-	else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
-		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
-	else if (IS_GEN5(dev_priv))
-		dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk;
-	else if (IS_GM45(dev_priv))
-		dev_priv->display.get_cdclk = gm45_get_cdclk;
-	else if (IS_G4X(dev_priv))
-		dev_priv->display.get_cdclk = g33_get_cdclk;
-	else if (IS_I965GM(dev_priv))
-		dev_priv->display.get_cdclk = i965gm_get_cdclk;
-	else if (IS_I965G(dev_priv))
-		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
-	else if (IS_PINEVIEW(dev_priv))
-		dev_priv->display.get_cdclk = pnv_get_cdclk;
-	else if (IS_G33(dev_priv))
-		dev_priv->display.get_cdclk = g33_get_cdclk;
-	else if (IS_I945GM(dev_priv))
-		dev_priv->display.get_cdclk = i945gm_get_cdclk;
-	else if (IS_I945G(dev_priv))
-		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
-	else if (IS_I915GM(dev_priv))
-		dev_priv->display.get_cdclk = i915gm_get_cdclk;
-	else if (IS_I915G(dev_priv))
-		dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk;
-	else if (IS_I865G(dev_priv))
-		dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk;
-	else if (IS_I85X(dev_priv))
-		dev_priv->display.get_cdclk = i85x_get_cdclk;
-	else  if (IS_I845G(dev_priv))
-		dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk;
-	else { /* 830 */
-		WARN(!IS_I830(dev_priv), "Unknown platform. Assuming 133 MHz CDCLK\n");
-		dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk;
-	}
-
 	if (IS_GEN5(dev_priv)) {
 		dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
 	} else if (IS_GEN6(dev_priv)) {
@@ -16295,28 +14628,6 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
 		dev_priv->display.fdi_link_train = hsw_fdi_link_train;
 	}
 
-	if (IS_BROADWELL(dev_priv)) {
-		dev_priv->display.modeset_commit_cdclk =
-			broadwell_modeset_commit_cdclk;
-		dev_priv->display.modeset_calc_cdclk =
-			broadwell_modeset_calc_cdclk;
-	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
-		dev_priv->display.modeset_commit_cdclk =
-			valleyview_modeset_commit_cdclk;
-		dev_priv->display.modeset_calc_cdclk =
-			valleyview_modeset_calc_cdclk;
-	} else if (IS_GEN9_LP(dev_priv)) {
-		dev_priv->display.modeset_commit_cdclk =
-			bxt_modeset_commit_cdclk;
-		dev_priv->display.modeset_calc_cdclk =
-			bxt_modeset_calc_cdclk;
-	} else if (IS_GEN9_BC(dev_priv)) {
-		dev_priv->display.modeset_commit_cdclk =
-			skl_modeset_commit_cdclk;
-		dev_priv->display.modeset_calc_cdclk =
-			skl_modeset_calc_cdclk;
-	}
-
 	if (dev_priv->info.gen >= 9)
 		dev_priv->display.update_crtcs = skl_update_crtcs;
 	else

drivers/gpu/drm/i915/intel_drv.h

@@ -1246,12 +1246,19 @@ void intel_audio_codec_disable(struct intel_encoder *encoder);
 void i915_audio_component_init(struct drm_i915_private *dev_priv);
 void i915_audio_component_cleanup(struct drm_i915_private *dev_priv);
 
+/* intel_cdclk.c */
+void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv);
+void intel_update_max_cdclk(struct drm_i915_private *dev_priv);
+void intel_update_cdclk(struct drm_i915_private *dev_priv);
+void intel_update_rawclk(struct drm_i915_private *dev_priv);
+
 /* intel_display.c */
 enum transcoder intel_crtc_pch_transcoder(struct intel_crtc *crtc);
-void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv, int vco);
 void intel_update_rawclk(struct drm_i915_private *dev_priv);
 int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
 		      const char *name, u32 reg, int ref_freq);
+int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
+			   const char *name, u32 reg);
 void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv);
 void lpt_disable_iclkip(struct drm_i915_private *dev_priv);
 extern const struct drm_plane_funcs intel_plane_funcs;