drm/i915/mtl: C20 PLL programming

C20 phy PLL programming sequence for DP, DP2.0, HDMI2.x non-FRL and
HDMI2.x FRL. This enables C20 MPLLA and MPLLB programming sequence. add
4 lane support for c20.

v2: Add 6.48Gbps and 6.75Gbps modes for eDP (RK)
    Fix lane check (RK)
    Fix multiline commenting (Arun)
    use usleep_range() instead of msleep() (Andi)
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428095433.4109054-2-mika.kahola@intel.com

drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h

@@ -177,4 +177,37 @@
 #define PHY_CX0_TX_CONTROL(tx, control)	(0x400 + ((tx) - 1) * 0x200 + (control))
 #define   CONTROL2_DISABLE_SINGLE_TX	REG_BIT(6)
 
+/* C20 Registers */
+#define PHY_C20_WR_ADDRESS_L		0xC02
+#define PHY_C20_WR_ADDRESS_H		0xC03
+#define PHY_C20_WR_DATA_L		0xC04
+#define PHY_C20_WR_DATA_H		0xC05
+#define PHY_C20_RD_ADDRESS_L		0xC06
+#define PHY_C20_RD_ADDRESS_H		0xC07
+#define PHY_C20_RD_DATA_L		0xC08
+#define PHY_C20_RD_DATA_H		0xC09
+#define PHY_C20_VDR_CUSTOM_SERDES_RATE	0xD00
+#define PHY_C20_VDR_HDMI_RATE		0xD01
+#define   PHY_C20_CONTEXT_TOGGLE	REG_BIT8(0)
+#define   PHY_C20_CUSTOM_SERDES_MASK	REG_GENMASK8(4, 1)
+#define   PHY_C20_CUSTOM_SERDES(val)	REG_FIELD_PREP8(PHY_C20_CUSTOM_SERDES_MASK, val)
+#define PHY_C20_VDR_CUSTOM_WIDTH	0xD02
+#define   PHY_C20_CUSTOM_WIDTH_MASK	REG_GENMASK(1, 0)
+#define   PHY_C20_CUSTOM_WIDTH(val)	REG_FIELD_PREP8(PHY_C20_CUSTOM_WIDTH_MASK, val)
+#define PHY_C20_A_TX_CNTX_CFG(idx)	(0xCF2E - (idx))
+#define PHY_C20_B_TX_CNTX_CFG(idx)	(0xCF2A - (idx))
+#define PHY_C20_A_CMN_CNTX_CFG(idx)	(0xCDAA - (idx))
+#define PHY_C20_B_CMN_CNTX_CFG(idx)	(0xCDA5 - (idx))
+#define PHY_C20_A_MPLLA_CNTX_CFG(idx)	(0xCCF0 - (idx))
+#define PHY_C20_B_MPLLA_CNTX_CFG(idx)	(0xCCE5 - (idx))
+#define   C20_MPLLA_FRACEN		REG_BIT(14)
+#define   C20_MPLLA_TX_CLK_DIV_MASK	REG_GENMASK(10, 8)
+#define PHY_C20_A_MPLLB_CNTX_CFG(idx)	(0xCB5A - (idx))
+#define PHY_C20_B_MPLLB_CNTX_CFG(idx)	(0xCB4E - (idx))
+#define   C20_MPLLB_TX_CLK_DIV_MASK	REG_GENMASK(15, 13)
+#define   C20_MPLLB_FRACEN		REG_BIT(13)
+#define   C20_MULTIPLIER_MASK		REG_GENMASK(11, 0)
+
+#define RAWLANEAONX_DIG_TX_MPLLB_CAL_DONE_BANK(idx) (0x303D + (idx))
+
 #endif /* __INTEL_CX0_REG_DEFS_H__ */

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -3359,7 +3359,8 @@ void intel_ddi_update_active_dpll(struct intel_atomic_state *state,
 	struct intel_crtc *slave_crtc;
 	enum phy phy = intel_port_to_phy(i915, encoder->port);
 
-	if (!intel_phy_is_tc(i915, phy))
+	/* FIXME: Add MTL pll_mgr */
+	if (DISPLAY_VER(i915) >= 14 || !intel_phy_is_tc(i915, phy))
 		return;
 
 	intel_update_active_dpll(state, crtc, encoder);

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -996,8 +996,21 @@ struct intel_c10pll_state {
 	u8 pll[20];
 };
 
+struct intel_c20pll_state {
+	u32 clock; /* in kHz */
+	u16 tx[3];
+	u16 cmn[4];
+	union {
+		u16 mplla[10];
+		u16 mpllb[11];
+	};
+};
+
 struct intel_cx0pll_state {
+	union {
 		struct intel_c10pll_state c10;
+		struct intel_c20pll_state c20;
+	};
 	bool ssc_enabled;
 };
 

drivers/gpu/drm/i915/display/intel_dp.c

@@ -53,6 +53,7 @@
 #include "intel_combo_phy_regs.h"
 #include "intel_connector.h"
 #include "intel_crtc.h"
+#include "intel_cx0_phy.h"
 #include "intel_ddi.h"
 #include "intel_de.h"
 #include "intel_display_types.h"
@@ -423,7 +424,14 @@ static int ehl_max_source_rate(struct intel_dp *intel_dp)
 
 static int mtl_max_source_rate(struct intel_dp *intel_dp)
 {
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
+	enum phy phy = intel_port_to_phy(i915, dig_port->base.port);
+
+	if (intel_is_c10phy(i915, phy))
 		return intel_dp_is_edp(intel_dp) ? 675000 : 810000;
+
+	return 2000000;
 }
 
 static int vbt_max_link_rate(struct intel_dp *intel_dp)
@@ -452,7 +460,7 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp)
 	/* The values must be in increasing order */
 	static const int mtl_rates[] = {
 		162000, 216000, 243000, 270000, 324000, 432000, 540000, 675000,
-		810000,
+		810000,	1000000, 1350000, 2000000,
 	};
 	static const int icl_rates[] = {
 		162000, 216000, 270000, 324000, 432000, 540000, 648000, 810000,