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Commit 1cbcd3b4 authored by Matt Roper's avatar Matt Roper
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drm/i915: Combine bxt_set_cdclk and cnl_set_cdclk 

We'd previously combined ICL/TGL logic into the cnl_set_cdclk function,
but BXT is pretty similar as well.  Roll the cnl/icl/tgl logic back into
the bxt function; the only things we really need to handle separately
are punit notification and calling different functions to enable/disable
the cdclk PLL.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190910154252.30503-4-matthew.d.roper@intel.com
parent 736da811
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Showing with 119 additions and 148 deletions
drivers/gpu/drm/i915/display/intel_cdclk.c
View file @ 1cbcd3b4
......@@ -1440,6 +1440,39 @@ static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco)
dev_priv->cdclk.hw.vco = vco;
}
static void cnl_cdclk_pll_disable(struct drm_i915_private *dev_priv)
{
u32 val;
val = I915_READ(BXT_DE_PLL_ENABLE);
val &= ~BXT_DE_PLL_PLL_ENABLE;
I915_WRITE(BXT_DE_PLL_ENABLE, val);
/* Timeout 200us */
if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) == 0, 1))
DRM_ERROR("timeout waiting for CDCLK PLL unlock\n");
dev_priv->cdclk.hw.vco = 0;
}
static void cnl_cdclk_pll_enable(struct drm_i915_private *dev_priv, int vco)
{
int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref);
u32 val;
val = CNL_CDCLK_PLL_RATIO(ratio);
I915_WRITE(BXT_DE_PLL_ENABLE, val);
val |= BXT_DE_PLL_PLL_ENABLE;
I915_WRITE(BXT_DE_PLL_ENABLE, val);
/* Timeout 200us */
if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) != 0, 1))
DRM_ERROR("timeout waiting for CDCLK PLL lock\n");
dev_priv->cdclk.hw.vco = vco;
}
static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
const struct intel_cdclk_state *cdclk_state,
enum pipe pipe)
......@@ -1449,6 +1482,27 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
u32 val, divider;
int ret;
/* Inform power controller of upcoming frequency change. */
if (INTEL_GEN(dev_priv) >= 10)
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);
else
/*
* BSpec requires us to wait up to 150usec, but that leads to
* timeouts; the 2ms used here is based on experiment.
*/
ret = sandybridge_pcode_write_timeout(dev_priv,
HSW_PCODE_DE_WRITE_FREQ_REQ,
0x80000000, 150, 2);
if (ret) {
DRM_ERROR("Failed to inform PCU about cdclk change (err %d, freq %d)\n",
ret, cdclk);
return;
}
/* cdclk = vco / 2 / div{1,1.5,2,4} */
switch (DIV_ROUND_CLOSEST(vco, cdclk)) {
default:
......@@ -1459,63 +1513,82 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
divider = BXT_CDCLK_CD2X_DIV_SEL_1;
break;
case 3:
WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
WARN(IS_GEMINILAKE(dev_priv) || INTEL_GEN(dev_priv) >= 10,
"Unsupported divider\n");
divider = BXT_CDCLK_CD2X_DIV_SEL_1_5;
break;
case 4:
divider = BXT_CDCLK_CD2X_DIV_SEL_2;
break;
case 8:
WARN(INTEL_GEN(dev_priv) >= 10, "Unsupported divider\n");
divider = BXT_CDCLK_CD2X_DIV_SEL_4;
break;
}
/*
* Inform power controller of upcoming frequency change. BSpec
* requires us to wait up to 150usec, but that leads to timeouts;
* the 2ms used here is based on experiment.
*/
ret = sandybridge_pcode_write_timeout(dev_priv,
HSW_PCODE_DE_WRITE_FREQ_REQ,
0x80000000, 150, 2);
if (ret) {
DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n",
ret, cdclk);
return;
}
if (INTEL_GEN(dev_priv) >= 10) {
if (dev_priv->cdclk.hw.vco != 0 &&
dev_priv->cdclk.hw.vco != vco)
cnl_cdclk_pll_disable(dev_priv);
if (dev_priv->cdclk.hw.vco != vco)
cnl_cdclk_pll_enable(dev_priv, vco);
} else {
if (dev_priv->cdclk.hw.vco != 0 &&
dev_priv->cdclk.hw.vco != vco)
bxt_de_pll_disable(dev_priv);
if (dev_priv->cdclk.hw.vco != vco)
bxt_de_pll_enable(dev_priv, vco);
}
val = divider | skl_cdclk_decimal(cdclk);
if (INTEL_GEN(dev_priv) >= 12) {
if (pipe == INVALID_PIPE)
val |= TGL_CDCLK_CD2X_PIPE_NONE;
else
val |= TGL_CDCLK_CD2X_PIPE(pipe);
} else if (INTEL_GEN(dev_priv) >= 11) {
if (pipe == INVALID_PIPE)
val |= ICL_CDCLK_CD2X_PIPE_NONE;
else
val |= ICL_CDCLK_CD2X_PIPE(pipe);
} else {
if (pipe == INVALID_PIPE)
val |= BXT_CDCLK_CD2X_PIPE_NONE;
else
val |= BXT_CDCLK_CD2X_PIPE(pipe);
}
/*
* Disable SSA Precharge when CD clock frequency < 500 MHz,
* enable otherwise.
*/
if (cdclk >= 500000)
if (IS_GEN9_LP(dev_priv) && cdclk >= 500000)
val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
I915_WRITE(CDCLK_CTL, val);
if (pipe != INVALID_PIPE)
intel_wait_for_vblank(dev_priv, pipe);
if (INTEL_GEN(dev_priv) >= 10) {
ret = sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
cdclk_state->voltage_level);
} else {
/*
* The timeout isn't specified, the 2ms used here is based on
* experiment.
* FIXME: Waiting for the request completion could be delayed until
* the next PCODE request based on BSpec.
* FIXME: Waiting for the request completion could be delayed
* until the next PCODE request based on BSpec.
*/
ret = sandybridge_pcode_write_timeout(dev_priv,
HSW_PCODE_DE_WRITE_FREQ_REQ,
cdclk_state->voltage_level, 150, 2);
cdclk_state->voltage_level,
150, 2);
}
if (ret) {
DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n",
ret, cdclk);
......@@ -1523,6 +1596,13 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
}
intel_update_cdclk(dev_priv);
if (INTEL_GEN(dev_priv) >= 10)
/*
* Can't read out the voltage level :(
* Let's just assume everything is as expected.
*/
dev_priv->cdclk.hw.voltage_level = cdclk_state->voltage_level;
}
static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv)
......@@ -1608,115 +1688,6 @@ static void bxt_uninit_cdclk(struct drm_i915_private *dev_priv)
bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
}
static void cnl_cdclk_pll_disable(struct drm_i915_private *dev_priv)
{
u32 val;
val = I915_READ(BXT_DE_PLL_ENABLE);
val &= ~BXT_DE_PLL_PLL_ENABLE;
I915_WRITE(BXT_DE_PLL_ENABLE, val);
/* Timeout 200us */
if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) == 0, 1))
DRM_ERROR("timeout waiting for CDCLK PLL unlock\n");
dev_priv->cdclk.hw.vco = 0;
}
static void cnl_cdclk_pll_enable(struct drm_i915_private *dev_priv, int vco)
{
int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref);
u32 val;
val = CNL_CDCLK_PLL_RATIO(ratio);
I915_WRITE(BXT_DE_PLL_ENABLE, val);
val |= BXT_DE_PLL_PLL_ENABLE;
I915_WRITE(BXT_DE_PLL_ENABLE, val);
/* Timeout 200us */
if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) != 0, 1))
DRM_ERROR("timeout waiting for CDCLK PLL lock\n");
dev_priv->cdclk.hw.vco = vco;
}
static void cnl_set_cdclk(struct drm_i915_private *dev_priv,
const struct intel_cdclk_state *cdclk_state,
enum pipe pipe)
{
int cdclk = cdclk_state->cdclk;
int vco = cdclk_state->vco;
u32 val, divider;
int ret;
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);
if (ret) {
DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
ret);
return;
}
/* cdclk = vco / 2 / div{1,2} */
switch (DIV_ROUND_CLOSEST(vco, cdclk)) {
default:
WARN_ON(cdclk != dev_priv->cdclk.hw.bypass);
WARN_ON(vco != 0);
/* fall through */
case 2:
divider = BXT_CDCLK_CD2X_DIV_SEL_1;
break;
case 4:
divider = BXT_CDCLK_CD2X_DIV_SEL_2;
break;
}
if (dev_priv->cdclk.hw.vco != 0 &&
dev_priv->cdclk.hw.vco != vco)
cnl_cdclk_pll_disable(dev_priv);
if (dev_priv->cdclk.hw.vco != vco)
cnl_cdclk_pll_enable(dev_priv, vco);
val = divider | skl_cdclk_decimal(cdclk);
if (INTEL_GEN(dev_priv) >= 12) {
if (pipe == INVALID_PIPE)
val |= TGL_CDCLK_CD2X_PIPE_NONE;
else
val |= TGL_CDCLK_CD2X_PIPE(pipe);
} else if (INTEL_GEN(dev_priv) >= 11) {
if (pipe == INVALID_PIPE)
val |= ICL_CDCLK_CD2X_PIPE_NONE;
else
val |= ICL_CDCLK_CD2X_PIPE(pipe);
} else {
if (pipe == INVALID_PIPE)
val |= BXT_CDCLK_CD2X_PIPE_NONE;
else
val |= BXT_CDCLK_CD2X_PIPE(pipe);
}
I915_WRITE(CDCLK_CTL, val);
if (pipe != INVALID_PIPE)
intel_wait_for_vblank(dev_priv, pipe);
/* inform PCU of the change */
sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
cdclk_state->voltage_level);
intel_update_cdclk(dev_priv);
/*
* Can't read out the voltage level :(
* Let's just assume everything is as expected.
*/
dev_priv->cdclk.hw.voltage_level = cdclk_state->voltage_level;
}
static void cnl_sanitize_cdclk(struct drm_i915_private *dev_priv)
{
u32 cdctl, expected;
......@@ -1797,7 +1768,7 @@ static void icl_init_cdclk(struct drm_i915_private *dev_priv)
sanitized_state.voltage_level =
icl_calc_voltage_level(sanitized_state.cdclk);
cnl_set_cdclk(dev_priv, &sanitized_state, INVALID_PIPE);
bxt_set_cdclk(dev_priv, &sanitized_state, INVALID_PIPE);
}
static void icl_uninit_cdclk(struct drm_i915_private *dev_priv)
......@@ -1813,7 +1784,7 @@ static void icl_uninit_cdclk(struct drm_i915_private *dev_priv)
cdclk_state.voltage_level =
icl_calc_voltage_level(cdclk_state.cdclk);
cnl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
}
static void cnl_init_cdclk(struct drm_i915_private *dev_priv)
......@@ -1832,7 +1803,7 @@ static void cnl_init_cdclk(struct drm_i915_private *dev_priv)
cdclk_state.vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk_state.cdclk);
cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk);
cnl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
}
static void cnl_uninit_cdclk(struct drm_i915_private *dev_priv)
......@@ -1843,7 +1814,7 @@ static void cnl_uninit_cdclk(struct drm_i915_private *dev_priv)
cdclk_state.vco = 0;
cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk);
cnl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
}
/**
......@@ -2646,11 +2617,11 @@ void intel_update_rawclk(struct drm_i915_private *dev_priv)
void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
{
if (INTEL_GEN(dev_priv) >= 11) {
dev_priv->display.set_cdclk = cnl_set_cdclk;
dev_priv->display.set_cdclk = bxt_set_cdclk;
dev_priv->display.modeset_calc_cdclk = icl_modeset_calc_cdclk;
dev_priv->cdclk.table = icl_cdclk_table;
} else if (IS_CANNONLAKE(dev_priv)) {
dev_priv->display.set_cdclk = cnl_set_cdclk;
dev_priv->display.set_cdclk = bxt_set_cdclk;
dev_priv->display.modeset_calc_cdclk = cnl_modeset_calc_cdclk;
dev_priv->cdclk.table = cnl_cdclk_table;
} else if (IS_GEN9_LP(dev_priv)) {
......
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