[PATCH 00/12] All sort of cdclk stuff

[PATCH 00/12] All sort of cdclk stuff

[Mika Kahola]

This patch series rebases Ville's original cdclk patch series
excluding the ones that	are already reviewed.

http://lists.freedesktop.org/archives/intel-gfx/2014-November/055633.html

The patches include modifications to

Ville Syrjälä (12):
  drm/i915: Fix i855 get_display_clock_speed
  drm/i915: Fix 852GM/GMV cdclk
  drm/i915: Add cdclk extraction for g33, g965gm and g4x
  drm/i915: Warn when cdclk for the platforms is not known
  drm/i915: Cache current cdclk frequency in dev_priv
  drm/i915: Use cached cdclk value
  drm/i915: Unify ilk and hsw .get_aux_clock_divider
  drm/i915: Store max cdclk value in dev_priv
  drm/i915: Don't enable IPS when pixel rate exceeds 95%
  drm/i915: HSW cdclk support
  drm/i915: Add IS_BDW_ULX
  drm/i915: BDW clock change support

 drivers/gpu/drm/i915/i915_drv.h      |   5 +-
 drivers/gpu/drm/i915/i915_reg.h      |  18 +-
 drivers/gpu/drm/i915/intel_display.c | 541 +++++++++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_dp.c      |  24 +-
 drivers/gpu/drm/i915/intel_drv.h     |   2 +-
 drivers/gpu/drm/i915/intel_pm.c      |  19 +-
 6 files changed, 550 insertions(+), 59 deletions(-)

-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 01/12] drm/i915: Fix i855 get_display_clock_speed

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Actually read the HPLLCC register insted of assuming it's 0. Fix the
HPLLCC bit definitions and all the missing ones from the 852GME spec.

852GME, 854 and 855 all seem to match the same HPLLC encoding even
though only some of the values are valid is some of the platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      | 11 ++++++++---
 drivers/gpu/drm/i915/intel_display.c | 15 ++++++++++++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 077cb90..441bf38 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -50,12 +50,17 @@
 
 /* PCI config space */
 
-#define HPLLCC	0xc0 /* 855 only */
-#define   GC_CLOCK_CONTROL_MASK		(0xf << 0)
+#define HPLLCC	0xc0 /* 85x only */
+#define   GC_CLOCK_CONTROL_MASK		(0x7 << 0)
 #define   GC_CLOCK_133_200		(0 << 0)
 #define   GC_CLOCK_100_200		(1 << 0)
 #define   GC_CLOCK_100_133		(2 << 0)
-#define   GC_CLOCK_166_250		(3 << 0)
+#define   GC_CLOCK_133_266		(3 << 0)
+#define   GC_CLOCK_133_200_2		(4 << 0)
+#define   GC_CLOCK_133_266_2		(5 << 0)
+#define   GC_CLOCK_166_266		(6 << 0)
+#define   GC_CLOCK_166_250		(7 << 0)
+
 #define GCFGC2	0xda
 #define GCFGC	0xf0 /* 915+ only */
 #define   GC_LOW_FREQUENCY_ENABLE	(1 << 7)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 75afa6e..71123c7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6301,20 +6301,29 @@ static int i865_get_display_clock_speed(struct drm_device *dev)
 	return 266667;
 }
 
-static int i855_get_display_clock_speed(struct drm_device *dev)
+static int i85x_get_display_clock_speed(struct drm_device *dev)
 {
 	u16 hpllcc = 0;
+
+	pci_bus_read_config_word(dev->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 */
@@ -13986,8 +13995,8 @@ static void intel_init_display(struct drm_device *dev)
 			i865_get_display_clock_speed;
 	else if (IS_I85X(dev))
 		dev_priv->display.get_display_clock_speed =
-			i855_get_display_clock_speed;
-	else /* 852, 830 */
+			i85x_get_display_clock_speed;
+	else /* 830 */
 		dev_priv->display.get_display_clock_speed =
 			i830_get_display_clock_speed;
 
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 02/12] drm/i915: Fix 852GM/GMV cdclk

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

It seems 852GM/GMV uses a different HPLLCC encoding than the other
85x platforms. For 852GM/GMV cdclk is always 133MHz. Try to detect that
using the PCI revision (sinc the device ID seems useless for that). I'm
not at all sure this is a good idea, but according to the specs it
should work.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 71123c7..7afde69 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6305,6 +6305,14 @@ static int i85x_get_display_clock_speed(struct drm_device *dev)
 {
 	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 (dev->pdev->revision == 0x1)
+		return 133333;
+
 	pci_bus_read_config_word(dev->pdev->bus,
 				 PCI_DEVFN(0, 3), HPLLCC, &hpllcc);
 
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 03/12] drm/i915: Add cdclk extraction for g33, g965gm and g4x

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Implement cdclk extraction for g33, 965gm and g4x platforms. The details
came from configdb. Sadly there isn't anything there for other gen3/gen4
chipsets.

So far I've tested this on one ELK where it gave me a HPLL VCO of 5333
MHz and cdclk of 444 MHz which seems perfectly sane for this machine.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

V2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      |   3 +
 drivers/gpu/drm/i915/intel_display.c | 183 ++++++++++++++++++++++++++++++++++-
 2 files changed, 185 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 441bf38..d4cf3bc 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2223,6 +2223,9 @@ enum skl_disp_power_wells {
 #define CLKCFG_MEM_800					(3 << 4)
 #define CLKCFG_MEM_MASK					(7 << 4)
 
+#define HPLLVCO                 (MCHBAR_MIRROR_BASE + 0xc38)
+#define HPLLVCO_MOBILE          (MCHBAR_MIRROR_BASE + 0xc0f)
+
 #define TSC1			0x11001
 #define   TSE			(1<<0)
 #define TR1			0x11006
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7afde69..ac5031c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6343,6 +6343,175 @@ static int i830_get_display_clock_speed(struct drm_device *dev)
 	return 133333;
 }
 
+static unsigned int intel_hpll_vco(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	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))
+		vco_table = ctg_vco;
+	else if (IS_G4X(dev))
+		vco_table = elk_vco;
+	else if (IS_CRESTLINE(dev))
+		vco_table = cl_vco;
+	else if (IS_PINEVIEW(dev))
+		vco_table = pnv_vco;
+	else if (IS_G33(dev))
+		vco_table = blb_vco;
+	else
+		return 0;
+
+	tmp = I915_READ(IS_MOBILE(dev) ? 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 gm45_get_display_clock_speed(struct drm_device *dev)
+{
+	unsigned int cdclk_sel, vco = intel_hpll_vco(dev);
+	uint16_t tmp = 0;
+
+	pci_read_config_word(dev->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 i965gm_get_display_clock_speed(struct drm_device *dev)
+{
+	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);
+	uint16_t tmp = 0;
+
+	pci_read_config_word(dev->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 g33_get_display_clock_speed(struct drm_device *dev)
+{
+	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);
+	uint16_t tmp = 0;
+
+	pci_read_config_word(dev->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 void
 intel_reduce_m_n_ratio(uint32_t *num, uint32_t *den)
 {
@@ -13983,9 +14152,21 @@ static void intel_init_display(struct drm_device *dev)
 		dev_priv->display.get_display_clock_speed =
 			ilk_get_display_clock_speed;
 	else if (IS_I945G(dev) || IS_BROADWATER(dev) ||
-		 IS_GEN6(dev) || IS_IVYBRIDGE(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev)))
+		 IS_GEN6(dev) || IS_IVYBRIDGE(dev))
 		dev_priv->display.get_display_clock_speed =
 			i945_get_display_clock_speed;
+	else if (IS_GM45(dev))
+		dev_priv->display.get_display_clock_speed =
+			gm45_get_display_clock_speed;
+	else if (IS_CRESTLINE(dev))
+		dev_priv->display.get_display_clock_speed =
+			i965gm_get_display_clock_speed;
+	else if (IS_PINEVIEW(dev))
+		dev_priv->display.get_display_clock_speed =
+			pnv_get_display_clock_speed;
+	else if (IS_G33(dev) || IS_G4X(dev))
+		dev_priv->display.get_display_clock_speed =
+			g33_get_display_clock_speed;
 	else if (IS_I915G(dev))
 		dev_priv->display.get_display_clock_speed =
 			i915_get_display_clock_speed;
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 04/12] drm/i915: Warn when cdclk for the platforms is not known

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Print a warning if we fall through the .get_display_clock_speed() function
pointer setup. We end up assuming a 133MHz cdclk which should mean that
at least we avoid any 0 deivisions and whatnot. But this could at least
help remind people that they have to provide this function for new platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ac5031c..20aa288 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14185,9 +14185,11 @@ static void intel_init_display(struct drm_device *dev)
 	else if (IS_I85X(dev))
 		dev_priv->display.get_display_clock_speed =
 			i85x_get_display_clock_speed;
-	else /* 830 */
+	else { /* 830 */
+		WARN(!IS_I830(dev), "Unknown platform. Assuming 133 MHz CDCLK\n");
 		dev_priv->display.get_display_clock_speed =
 			i830_get_display_clock_speed;
+	}
 
 	if (IS_GEN5(dev)) {
 		dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 05/12] drm/i915: Cache current cdclk frequency in dev_priv

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Rather that extracting the current cdclk freuqncy every time someone
wants to know it, cache the current value and use that. VLV/CHV already
stored a cached value there so just expand that to cover all platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

V2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h      |  2 +-
 drivers/gpu/drm/i915/intel_display.c | 40 +++++++++++++++++++++++-------------
 2 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 89231ae..baec8d2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1657,7 +1657,7 @@ struct drm_i915_private {
 	int num_fence_regs; /* 8 on pre-965, 16 otherwise */
 
 	unsigned int fsb_freq, mem_freq, is_ddr3;
-	unsigned int vlv_cdclk_freq;
+	unsigned int cdclk_freq;
 	unsigned int hpll_freq;
 
 	/**
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 20aa288..3204e5e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5210,20 +5210,27 @@ static int valleyview_get_vco(struct drm_i915_private *dev_priv)
 	return vco_freq[hpll_freq] * 1000;
 }
 
-static void vlv_update_cdclk(struct drm_device *dev)
+static void intel_update_cdclk(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	dev_priv->vlv_cdclk_freq = dev_priv->display.get_display_clock_speed(dev);
+	dev_priv->cdclk_freq = dev_priv->display.get_display_clock_speed(dev);
 	DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz\n",
-			 dev_priv->vlv_cdclk_freq);
+			 dev_priv->cdclk_freq);
 
 	/*
 	 * Program the gmbus_freq based on the cdclk frequency.
 	 * BSpec erroneously claims we should aim for 4MHz, but
 	 * in fact 1MHz is the correct frequency.
 	 */
-	I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->vlv_cdclk_freq, 1000));
+	if (IS_VALLEYVIEW(dev)) {
+		/*
+		 * Program the gmbus_freq based on the cdclk frequency.
+		 * BSpec erroneously claims we should aim for 4MHz, but
+		 * in fact 1MHz is the correct frequency.
+		 */
+		I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->cdclk_freq, 1000));
+	}
 }
 
 /* Adjust CDclk dividers to allow high res or save power if possible */
@@ -5232,7 +5239,7 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 val, cmd;
 
-	WARN_ON(dev_priv->display.get_display_clock_speed(dev) != dev_priv->vlv_cdclk_freq);
+	WARN_ON(dev_priv->display.get_display_clock_speed(dev) != dev_priv->cdclk_freq);
 
 	if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */
 		cmd = 2;
@@ -5288,7 +5295,7 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
 	vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val);
 	mutex_unlock(&dev_priv->dpio_lock);
 
-	vlv_update_cdclk(dev);
+	intel_update_cdclk(dev);
 }
 
 static void cherryview_set_cdclk(struct drm_device *dev, int cdclk)
@@ -5296,7 +5303,7 @@ static void cherryview_set_cdclk(struct drm_device *dev, int cdclk)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 val, cmd;
 
-	WARN_ON(dev_priv->display.get_display_clock_speed(dev) != dev_priv->vlv_cdclk_freq);
+	WARN_ON(dev_priv->display.get_display_clock_speed(dev) != dev_priv->cdclk_freq);
 
 	switch (cdclk) {
 	case 333333:
@@ -5328,7 +5335,7 @@ static void cherryview_set_cdclk(struct drm_device *dev, int cdclk)
 	}
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
-	vlv_update_cdclk(dev);
+	intel_update_cdclk(dev);
 }
 
 static int valleyview_calc_cdclk(struct drm_i915_private *dev_priv,
@@ -5395,7 +5402,7 @@ static int valleyview_modeset_global_pipes(struct drm_atomic_state *state,
 		return max_pixclk;
 
 	if (valleyview_calc_cdclk(dev_priv, max_pixclk) ==
-	    dev_priv->vlv_cdclk_freq)
+	    dev_priv->cdclk_freq)
 		return 0;
 
 	/* disable/enable all currently active pipes while we change cdclk */
@@ -5415,7 +5422,7 @@ static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv)
 	else
 		default_credits = PFI_CREDIT(8);
 
-	if (DIV_ROUND_CLOSEST(dev_priv->vlv_cdclk_freq, 1000) >= dev_priv->rps.cz_freq) {
+	if (DIV_ROUND_CLOSEST(dev_priv->cdclk_freq, 1000) >= dev_priv->rps.cz_freq) {
 		/* CHV suggested value is 31 or 63 */
 		if (IS_CHERRYVIEW(dev_priv))
 			credits = PFI_CREDIT_31;
@@ -5459,7 +5466,7 @@ static void valleyview_modeset_global_resources(struct drm_atomic_state *state)
 
 	req_cdclk = valleyview_calc_cdclk(dev_priv, max_pixclk);
 
-	if (req_cdclk != dev_priv->vlv_cdclk_freq) {
+	if (req_cdclk != dev_priv->cdclk_freq) {
 		/*
 		 * FIXME: We can end up here with all power domains off, yet
 		 * with a CDCLK frequency other than the minimum. To account
@@ -5480,6 +5487,8 @@ static void valleyview_modeset_global_resources(struct drm_atomic_state *state)
 
 		intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A);
 	}
+
+	intel_update_cdclk(dev_priv->dev);
 }
 
 static void valleyview_crtc_enable(struct drm_crtc *crtc)
@@ -8950,6 +8959,8 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
 	}
 
 	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+
+	intel_update_cdclk(dev_priv->dev);
 }
 
 /*
@@ -12934,6 +12945,8 @@ static void intel_shared_dpll_init(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
+	intel_update_cdclk(dev);
+
 	if (HAS_DDI(dev))
 		intel_ddi_pll_init(dev);
 	else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
@@ -14424,10 +14437,9 @@ static void i915_disable_vga(struct drm_device *dev)
 
 void intel_modeset_init_hw(struct drm_device *dev)
 {
-	intel_prepare_ddi(dev);
+	intel_update_cdclk(dev);
 
-	if (IS_VALLEYVIEW(dev))
-		vlv_update_cdclk(dev);
+	intel_prepare_ddi(dev);
 
 	intel_init_clock_gating(dev);
 
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 06/12] drm/i915: Use cached cdclk value

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Rather than reading out the current cdclk value use the cached value we
have tucked away in dev_priv.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 3 +--
 drivers/gpu/drm/i915/intel_dp.c      | 5 +++--
 drivers/gpu/drm/i915/intel_pm.c      | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3204e5e..8965eb3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6072,8 +6072,7 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 
 	/* FIXME should check pixel clock limits on all platforms */
 	if (INTEL_INFO(dev)->gen < 4) {
-		int clock_limit =
-			dev_priv->display.get_display_clock_speed(dev);
+		int clock_limit = dev_priv->cdclk_freq;
 
 		/*
 		 * Enable pixel doubling when the dot clock
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 14cdd00..91ccdaa 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -702,7 +702,8 @@ static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 		return 0;
 
 	if (intel_dig_port->port == PORT_A) {
-		return DIV_ROUND_UP(dev_priv->display.get_display_clock_speed(dev), 2000);
+		return DIV_ROUND_UP(dev_priv->cdclk_freq, 2000);
+
 	} else {
 		return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
 	}
@@ -717,7 +718,7 @@ static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 	if (intel_dig_port->port == PORT_A) {
 		if (index)
 			return 0;
-		return DIV_ROUND_CLOSEST(dev_priv->display.get_display_clock_speed(dev), 2000);
+		return DIV_ROUND_CLOSEST(dev_priv->cdclk_freq, 2000);
 	} else if (dev_priv->pch_id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 		/* Workaround for non-ULT HSW */
 		switch (index) {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a80bfd5..79e4afd 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1816,7 +1816,7 @@ hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
 	linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
 				     mode->crtc_clock);
 	ips_linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
-					 dev_priv->display.get_display_clock_speed(dev_priv->dev));
+					 dev_priv->cdclk_freq);
 
 	return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
 	       PIPE_WM_LINETIME_TIME(linetime);
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 07/12] drm/i915: Unify ilk and hsw .get_aux_clock_divider

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

ilk_get_aux_clock_divider() is now a subset of
hsw_get_aux_clock_divider() so unify them.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 23 +++--------------------
 1 file changed, 3 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 91ccdaa..b415d3e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -698,23 +698,6 @@ static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 	struct drm_device *dev = intel_dig_port->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (index)
-		return 0;
-
-	if (intel_dig_port->port == PORT_A) {
-		return DIV_ROUND_UP(dev_priv->cdclk_freq, 2000);
-
-	} else {
-		return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
-	}
-}
-
-static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
-{
-	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
-	struct drm_device *dev = intel_dig_port->base.base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-
 	if (intel_dig_port->port == PORT_A) {
 		if (index)
 			return 0;
@@ -727,7 +710,9 @@ static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 		default: return 0;
 		}
 	} else  {
-		return index ? 0 : DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
+		if (index)
+			return 0;
+		return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
 	}
 }
 
@@ -5474,8 +5459,6 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 		intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
 	else if (IS_VALLEYVIEW(dev))
 		intel_dp->get_aux_clock_divider = vlv_get_aux_clock_divider;
-	else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
-		intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
 	else if (HAS_PCH_SPLIT(dev))
 		intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
 	else
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 08/12] drm/i915: Store max cdclk value in dev_priv

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Keep the cdclk maximum supported frequency around in dev_priv so that we
can verify certain things against it before actually changing the cdclk
frequency.

For now only VLV/CHV have support changing cdclk frequency, so other
plarforms get to assume cdclk is fixed.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h      |  2 +-
 drivers/gpu/drm/i915/intel_display.c | 20 +++++++++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index baec8d2..bae1ce9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1657,7 +1657,7 @@ struct drm_i915_private {
 	int num_fence_regs; /* 8 on pre-965, 16 otherwise */
 
 	unsigned int fsb_freq, mem_freq, is_ddr3;
-	unsigned int cdclk_freq;
+	unsigned int cdclk_freq, max_cdclk_freq;
 	unsigned int hpll_freq;
 
 	/**
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8965eb3..dbc880e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5210,6 +5210,21 @@ static int valleyview_get_vco(struct drm_i915_private *dev_priv)
 	return vco_freq[hpll_freq] * 1000;
 }
 
+static void intel_update_max_cdclk(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (IS_VALLEYVIEW(dev)) {
+		dev_priv->max_cdclk_freq = 400000;
+	} else {
+		/* otherwise assume cdclk is fixed */
+		dev_priv->max_cdclk_freq = dev_priv->cdclk_freq;
+	}
+
+	DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n",
+			 dev_priv->max_cdclk_freq);
+}
+
 static void intel_update_cdclk(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -5231,6 +5246,9 @@ static void intel_update_cdclk(struct drm_device *dev)
 		 */
 		I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->cdclk_freq, 1000));
 	}
+
+	if (dev_priv->max_cdclk_freq == 0)
+		intel_update_max_cdclk(dev);
 }
 
 /* Adjust CDclk dividers to allow high res or save power if possible */
@@ -6072,7 +6090,7 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 
 	/* FIXME should check pixel clock limits on all platforms */
 	if (INTEL_INFO(dev)->gen < 4) {
-		int clock_limit = dev_priv->cdclk_freq;
+		int clock_limit = dev_priv->max_cdclk_freq;
 
 		/*
 		 * Enable pixel doubling when the dot clock
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 09/12] drm/i915: Don't enable IPS when pixel rate exceeds 95%

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Bspec says we shouldn't enable IPS on BDW when the pipe pixel rate
exceeds 95% of the core display clock. Apparently this can cause
underruns.

There's no similar restriction listed for HSW, so leave that one alone
for now.

v2: Add pipe_config_supports_ips() (Chris)
v3: Compare against the max cdclk insted of the current cdclk

Tested-by: Timo Aaltonen <tjaalton@ubuntu.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83497
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v4: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 30 ++++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_drv.h     |  2 +-
 drivers/gpu/drm/i915/intel_pm.c      | 17 ++++++++---------
 3 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index dbc880e..fa7baf2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6072,12 +6072,38 @@ retry:
 	return ret;
 }
 
+static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv,
+				     struct intel_crtc_state *pipe_config)
+{
+	if (pipe_config->pipe_bpp > 24)
+		return false;
+
+	/* HSW can handle pixel rate up to cdclk? */
+	if (IS_HASWELL(dev_priv->dev))
+		return true;
+
+	/*
+	 * FIXME if we compare against max we should then
+	 * increase the cdclk frequency when the current
+	 * value is too low. The other option is to compare
+	 * against the cdclk frequency we're going have post
+	 * modeset (ie. one we computed using other constraints).
+	 * Need to measure whether using a lower cdclk w/o IPS
+	 * is better or worse than a higher cdclk w/ IPS.
+	 */
+	return ilk_pipe_pixel_rate(pipe_config) <=
+		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 = dev->dev_private;
+
 	pipe_config->ips_enabled = i915.enable_ips &&
-				   hsw_crtc_supports_ips(crtc) &&
-				   pipe_config->pipe_bpp <= 24;
+		hsw_crtc_supports_ips(crtc) &&
+		pipe_config_supports_ips(dev_priv, pipe_config);
 }
 
 static int intel_crtc_compute_config(struct intel_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 082be71..34ee6b9 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1351,7 +1351,7 @@ void ilk_wm_get_hw_state(struct drm_device *dev);
 void skl_wm_get_hw_state(struct drm_device *dev);
 void skl_ddb_get_hw_state(struct drm_i915_private *dev_priv,
 			  struct skl_ddb_allocation *ddb /* out */);
-
+uint32_t ilk_pipe_pixel_rate(const struct intel_crtc_state *pipe_config);
 
 /* intel_sdvo.c */
 bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 79e4afd..b130520 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1435,23 +1435,22 @@ static void i845_update_wm(struct drm_crtc *unused_crtc)
 	I915_WRITE(FW_BLC, fwater_lo);
 }
 
-static uint32_t ilk_pipe_pixel_rate(struct drm_device *dev,
-				    struct drm_crtc *crtc)
+uint32_t ilk_pipe_pixel_rate(const struct intel_crtc_state *pipe_config)
 {
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	uint32_t pixel_rate;
 
-	pixel_rate = intel_crtc->config->base.adjusted_mode.crtc_clock;
+	pixel_rate = pipe_config->base.adjusted_mode.crtc_clock;
 
 	/* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
 	 * adjust the pixel_rate here. */
 
-	if (intel_crtc->config->pch_pfit.enabled) {
+	if (pipe_config->pch_pfit.enabled) {
 		uint64_t pipe_w, pipe_h, pfit_w, pfit_h;
-		uint32_t pfit_size = intel_crtc->config->pch_pfit.size;
+		uint32_t pfit_size = pipe_config->pch_pfit.size;
+
+		pipe_w = pipe_config->pipe_src_w;
+		pipe_h = pipe_config->pipe_src_h;
 
-		pipe_w = intel_crtc->config->pipe_src_w;
-		pipe_h = intel_crtc->config->pipe_src_h;
 		pfit_w = (pfit_size >> 16) & 0xFFFF;
 		pfit_h = pfit_size & 0xFFFF;
 		if (pipe_w < pfit_w)
@@ -2067,7 +2066,7 @@ static void ilk_compute_wm_parameters(struct drm_crtc *crtc,
 
 	p->active = true;
 	p->pipe_htotal = intel_crtc->config->base.adjusted_mode.crtc_htotal;
-	p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc);
+	p->pixel_rate = ilk_pipe_pixel_rate(intel_crtc->config);
 
 	if (crtc->primary->state->fb) {
 		p->pri.enabled = true;
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 10/12] drm/i915: HSW cdclk support

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Implement support for changing the cdclk frequency during runtime on
HSW. VLV/CHV already have support for this, so we can follow their
example for the most part. Only the actual hardware programming differs,
the rest is pretty much the same.

The pipe pixel rate stuff is handled a bit differently for now due to
the difference in pch vs. gmch pfit handling. Eventually we should unify
that part to eliminate what is essentially duplicated code.

v2: Grab rps.hw_lock around sandybridge_pcode_write()
v3: Rebase due to power well vs. .global_resources() reordering

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v3: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      |   3 +
 drivers/gpu/drm/i915/intel_display.c | 140 ++++++++++++++++++++++++++++++++++-
 2 files changed, 140 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d4cf3bc..74ff995 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6410,6 +6410,7 @@ enum skl_disp_power_wells {
 #define   GEN6_PCODE_WRITE_D_COMP		0x11
 #define   GEN6_ENCODE_RC6_VID(mv)		(((mv) - 245) / 5)
 #define   GEN6_DECODE_RC6_VID(vids)		(((vids) * 5) + 245)
+#define   HSW_PCODE_DE_WRITE_FREQ_REQ		0x17
 #define   DISPLAY_IPS_CONTROL			0x19
 #define	  HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL	0x1A
 #define GEN6_PCODE_DATA				0x138128
@@ -6859,10 +6860,12 @@ enum skl_disp_power_wells {
 #define  LCPLL_PLL_LOCK			(1<<30)
 #define  LCPLL_CLK_FREQ_MASK		(3<<26)
 #define  LCPLL_CLK_FREQ_450		(0<<26)
+#define  LCPLL_CLK_FREQ_ALT_HSW		(1<<26) /* 337.5 (ULX) or 540 */
 #define  LCPLL_CLK_FREQ_54O_BDW		(1<<26)
 #define  LCPLL_CLK_FREQ_337_5_BDW	(2<<26)
 #define  LCPLL_CLK_FREQ_675_BDW		(3<<26)
 #define  LCPLL_CD_CLOCK_DISABLE		(1<<25)
+#define  LCPLL_ROOT_CD_CLOCK_DISABLE	(1<<24)
 #define  LCPLL_CD2X_CLOCK_DISABLE	(1<<23)
 #define  LCPLL_POWER_DOWN_ALLOW		(1<<22)
 #define  LCPLL_CD_SOURCE_FCLK		(1<<21)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fa7baf2..35489cd 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5214,7 +5214,16 @@ static void intel_update_max_cdclk(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (IS_VALLEYVIEW(dev)) {
+	if (IS_HASWELL(dev)) {
+		if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+			dev_priv->max_cdclk_freq = 450000;
+		else if (IS_HSW_ULX(dev))
+			dev_priv->max_cdclk_freq = 337500;
+		else if (IS_HSW_ULT(dev))
+			dev_priv->max_cdclk_freq = 450000;
+		else
+			dev_priv->max_cdclk_freq = 540000;
+	} else if (IS_VALLEYVIEW(dev)) {
 		dev_priv->max_cdclk_freq = 400000;
 	} else {
 		/* otherwise assume cdclk is fixed */
@@ -9065,6 +9074,125 @@ void hsw_disable_pc8(struct drm_i915_private *dev_priv)
 	intel_prepare_ddi(dev);
 }
 
+/* compute the max rate for new configuration */
+static int ilk_max_pixel_rate(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = dev_priv->dev;
+	struct intel_crtc *crtc;
+	int max_pixel_rate = 0;
+
+	for_each_intel_crtc(dev, crtc) {
+		if (crtc->new_enabled)
+			max_pixel_rate = max((int)max_pixel_rate,
+					     (int)ilk_pipe_pixel_rate(crtc->config));
+	}
+
+	return max_pixel_rate;
+}
+
+static int haswell_calc_cdclk(struct drm_i915_private *dev_priv,
+			      int max_pixel_rate)
+{
+	int cdclk;
+
+	/*
+	 * FIXME should also account for plane ratio
+	 * once 64bpp pixel formats are supported.
+	 */
+	if (max_pixel_rate > 450000)
+		cdclk = 540000;
+	else if (max_pixel_rate > 337500 || !IS_HSW_ULX(dev_priv))
+		cdclk = 450000;
+	else
+		cdclk = 337500;
+
+	/*
+	 * 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;
+	}
+
+	return cdclk;
+}
+
+static void haswell_set_cdclk(struct drm_device *dev, int cdclk)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	uint32_t val;
+
+	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;
+
+	val = I915_READ(LCPLL_CTL);
+	val &= ~LCPLL_CLK_FREQ_MASK;
+
+	switch (cdclk) {
+	case 450000:
+		val |= LCPLL_CLK_FREQ_450;
+		break;
+	case 337500:
+	case 540000:
+		val |= LCPLL_CLK_FREQ_ALT_HSW;
+		break;
+	default:
+		WARN(1, "invalid cdclk frequency\n");
+		return;
+	}
+
+	I915_WRITE(LCPLL_CTL, val);
+
+	if (IS_HSW_ULX(dev)) {
+		mutex_lock(&dev_priv->rps.hw_lock);
+		sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
+					cdclk == 337500);
+		mutex_unlock(&dev_priv->rps.hw_lock);
+	}
+
+	intel_update_cdclk(dev);
+
+	WARN(cdclk != dev_priv->cdclk_freq,
+	     "cdclk requested %d kHz but got %d kHz\n",
+	     cdclk, dev_priv->cdclk_freq);
+}
+
+static void haswell_modeset_global_pipes(struct drm_atomic_state *state,
+					 unsigned *prepare_pipes)
+{
+	struct drm_device *dev = state->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *crtc;
+	int max_pixel_rate = ilk_max_pixel_rate(dev_priv);
+
+	if (haswell_calc_cdclk(dev_priv, max_pixel_rate) == dev_priv->cdclk_freq)
+		return;
+
+	/* disable/enable all currently active pipes while we change cdclk */
+	for_each_intel_crtc(dev, crtc)
+		if (crtc->base.enabled)
+			*prepare_pipes |= 1 << crtc->pipe;
+}
+
+static void haswell_modeset_global_resources(struct drm_atomic_state *state)
+{
+	struct drm_device *dev = state->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	int max_pixel_rate = ilk_max_pixel_rate(dev_priv);
+	int req_cdclk = haswell_calc_cdclk(dev_priv, max_pixel_rate);
+
+	if (req_cdclk != dev_priv->cdclk_freq) {
+		haswell_set_cdclk(dev, req_cdclk);
+	}
+}
+
 static int haswell_crtc_compute_clock(struct intel_crtc *crtc,
 				      struct intel_crtc_state *crtc_state)
 {
@@ -12221,8 +12349,11 @@ static int __intel_set_mode(struct drm_crtc *crtc,
 	 * mode set on this crtc.  For other crtcs we need to use the
 	 * adjusted_mode bits in the crtc directly.
 	 */
-	if (IS_VALLEYVIEW(dev)) {
-		ret = valleyview_modeset_global_pipes(state, &prepare_pipes);
+	if (IS_VALLEYVIEW(dev) || IS_HASWELL(dev)) {
+		if (IS_VALLEYVIEW(dev))
+			valleyview_modeset_global_pipes(state, &prepare_pipes);
+		else
+			haswell_modeset_global_pipes(state, &prepare_pipes);
 		if (ret)
 			goto done;
 
@@ -14256,6 +14387,9 @@ static void intel_init_display(struct drm_device *dev)
 		dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
 	} else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
 		dev_priv->display.fdi_link_train = hsw_fdi_link_train;
+		if (IS_HASWELL(dev))
+			dev_priv->display.modeset_global_resources =
+				haswell_modeset_global_resources;
 	} else if (IS_VALLEYVIEW(dev)) {
 		dev_priv->display.modeset_global_resources =
 			valleyview_modeset_global_resources;
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 11/12] drm/i915: Add IS_BDW_ULX

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

We need to tell BDW ULT and ULX apart.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v2: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index bae1ce9..0c307f9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2327,6 +2327,9 @@ struct drm_i915_cmd_table {
 				 ((INTEL_DEVID(dev) & 0xf) == 0x6 ||	\
 				 (INTEL_DEVID(dev) & 0xf) == 0xb ||	\
 				 (INTEL_DEVID(dev) & 0xf) == 0xe))
+/* ULX machines are also considered ULT. */
+#define IS_BDW_ULX(dev)		(IS_BROADWELL(dev) && \
+				 (INTEL_DEVID(dev) & 0xf) == 0xe)
 #define IS_BDW_GT3(dev)		(IS_BROADWELL(dev) && \
 				 (INTEL_DEVID(dev) & 0x00F0) == 0x0020)
 #define IS_HSW_ULT(dev)		(IS_HASWELL(dev) && \
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 12/12] drm/i915: BDW clock change support

[Mika Kahola]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Add support for changing cdclk frequency during runtime on BDW. The
procedure is quite a bit different on BDW from the one on HSW, so
add a separate function for it.

Also with IPS enabled the actual pixel rate mustn't exceed 95% of cdclk,
so take that into account when computing the max pixel rate.

v2: Grab rps.hw_lock around sandybridge_pcode_write()
v3: Rebase due to power well vs. .global_resources() reordering

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

v4: Rebased to the latest

Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      |   1 +
 drivers/gpu/drm/i915/intel_display.c | 138 ++++++++++++++++++++++++++++++-----
 2 files changed, 122 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 74ff995..782d471 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6411,6 +6411,7 @@ enum skl_disp_power_wells {
 #define   GEN6_ENCODE_RC6_VID(mv)		(((mv) - 245) / 5)
 #define   GEN6_DECODE_RC6_VID(vids)		(((vids) * 5) + 245)
 #define   HSW_PCODE_DE_WRITE_FREQ_REQ		0x17
+#define   BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ	0x18
 #define   DISPLAY_IPS_CONTROL			0x19
 #define	  HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL	0x1A
 #define GEN6_PCODE_DATA				0x138128
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 35489cd..09f3518 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5214,7 +5214,22 @@ static void intel_update_max_cdclk(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (IS_HASWELL(dev)) {
+	if (IS_BROADWELL(dev))  {
+		/*
+		 * 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))
+			dev_priv->max_cdclk_freq = 450000;
+		else if (IS_BDW_ULT(dev))
+			dev_priv->max_cdclk_freq = 540000;
+		else
+			dev_priv->max_cdclk_freq = 675000;
+	} else if (IS_HASWELL(dev)) {
 		if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
 			dev_priv->max_cdclk_freq = 450000;
 		else if (IS_HSW_ULX(dev))
@@ -6092,13 +6107,11 @@ static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv,
 		return true;
 
 	/*
-	 * FIXME if we compare against max we should then
-	 * increase the cdclk frequency when the current
-	 * value is too low. The other option is to compare
-	 * against the cdclk frequency we're going have post
-	 * modeset (ie. one we computed using other constraints).
-	 * Need to measure whether using a lower cdclk w/o IPS
-	 * is better or worse than a higher cdclk w/ IPS.
+	 * 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 ilk_pipe_pixel_rate(pipe_config) <=
 		dev_priv->max_cdclk_freq * 95 / 100;
@@ -9082,9 +9095,18 @@ static int ilk_max_pixel_rate(struct drm_i915_private *dev_priv)
 	int max_pixel_rate = 0;
 
 	for_each_intel_crtc(dev, crtc) {
-		if (crtc->new_enabled)
-			max_pixel_rate = max((int)max_pixel_rate,
-					     (int)ilk_pipe_pixel_rate(crtc->config));
+		int pixel_rate;
+
+		if (!crtc->new_enabled)
+			continue;
+
+		pixel_rate = ilk_pipe_pixel_rate(crtc->config);
+
+		/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
+		if (IS_BROADWELL(dev) && crtc->config->ips_enabled)
+			pixel_rate = DIV_ROUND_UP(pixel_rate * 100, 95);
+
+		max_pixel_rate = max(max_pixel_rate, pixel_rate);
 	}
 
 	return max_pixel_rate;
@@ -9099,7 +9121,9 @@ static int haswell_calc_cdclk(struct drm_i915_private *dev_priv,
 	 * FIXME should also account for plane ratio
 	 * once 64bpp pixel formats are supported.
 	 */
-	if (max_pixel_rate > 450000)
+	if (max_pixel_rate > 540000)
+		cdclk = 675000;
+	else if (max_pixel_rate > 450000)
 		cdclk = 540000;
 	else if (max_pixel_rate > 337500 || !IS_HSW_ULX(dev_priv))
 		cdclk = 450000;
@@ -9164,6 +9188,83 @@ static void haswell_set_cdclk(struct drm_device *dev, int cdclk)
 	     cdclk, dev_priv->cdclk_freq);
 }
 
+static void broadwell_set_cdclk(struct drm_device *dev, int cdclk)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	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_atomic_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_atomic_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);
+
+	intel_update_cdclk(dev);
+
+	WARN(cdclk != dev_priv->cdclk_freq,
+	     "cdclk requested %d kHz but got %d kHz\n",
+	     cdclk, dev_priv->cdclk_freq);
+}
+
 static void haswell_modeset_global_pipes(struct drm_atomic_state *state,
 					 unsigned *prepare_pipes)
 {
@@ -9189,7 +9290,10 @@ static void haswell_modeset_global_resources(struct drm_atomic_state *state)
 	int req_cdclk = haswell_calc_cdclk(dev_priv, max_pixel_rate);
 
 	if (req_cdclk != dev_priv->cdclk_freq) {
-		haswell_set_cdclk(dev, req_cdclk);
+		if (IS_BROADWELL(dev))
+			broadwell_set_cdclk(dev, req_cdclk);
+		else
+			haswell_set_cdclk(dev, req_cdclk);
 	}
 }
 
@@ -12349,7 +12453,7 @@ static int __intel_set_mode(struct drm_crtc *crtc,
 	 * mode set on this crtc.  For other crtcs we need to use the
 	 * adjusted_mode bits in the crtc directly.
 	 */
-	if (IS_VALLEYVIEW(dev) || IS_HASWELL(dev)) {
+	if (IS_VALLEYVIEW(dev) || IS_HASWELL(dev) || IS_BROADWELL(dev)) {
 		if (IS_VALLEYVIEW(dev))
 			valleyview_modeset_global_pipes(state, &prepare_pipes);
 		else
@@ -14387,9 +14491,9 @@ static void intel_init_display(struct drm_device *dev)
 		dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
 	} else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
 		dev_priv->display.fdi_link_train = hsw_fdi_link_train;
-		if (IS_HASWELL(dev))
-			dev_priv->display.modeset_global_resources =
-				haswell_modeset_global_resources;
+		dev_priv->display.modeset_global_resources =
+			haswell_modeset_global_resources;
+
 	} else if (IS_VALLEYVIEW(dev)) {
 		dev_priv->display.modeset_global_resources =
 			valleyview_modeset_global_resources;
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 05/12] drm/i915: Cache current cdclk frequency in dev_priv

[Chris Wilson]

On Thu, Apr 16, 2015 at 10:40:51AM +0300, Mika Kahola wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Rather that extracting the current cdclk freuqncy every time someone
> wants to know it, cache the current value and use that. VLV/CHV already
> stored a cached value there so just expand that to cover all platforms.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> V2: Rebased to the latest
> 
> Signed-off-by: Mika Kahola <mika.kahola@intel.com>

Which debugfs file shows this? Do we have one for the similar clock freqs?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 05/12] drm/i915: Cache current cdclk frequency in dev_priv

[Mika Kahola]

On Thu, 2015-04-16 at 09:02 +0100, Chris Wilson wrote:
> On Thu, Apr 16, 2015 at 10:40:51AM +0300, Mika Kahola wrote:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > 
> > Rather that extracting the current cdclk freuqncy every time someone
> > wants to know it, cache the current value and use that. VLV/CHV already
> > stored a cached value there so just expand that to cover all platforms.
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > 
> > V2: Rebased to the latest
> > 
> > Signed-off-by: Mika Kahola <mika.kahola@intel.com>
> 
> Which debugfs file shows this? Do we have one for the similar clock freqs?
> -Chris
> 

I don't think we have one for cdclk. Then again, should we add this to
debugfs?

-Mika-

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 05/12] drm/i915: Cache current cdclk frequency in dev_priv

[Chris Wilson]

On Thu, Apr 16, 2015 at 01:51:43PM +0300, Mika Kahola wrote:
> On Thu, 2015-04-16 at 09:02 +0100, Chris Wilson wrote:
> > On Thu, Apr 16, 2015 at 10:40:51AM +0300, Mika Kahola wrote:
> > > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > > 
> > > Rather that extracting the current cdclk freuqncy every time someone
> > > wants to know it, cache the current value and use that. VLV/CHV already
> > > stored a cached value there so just expand that to cover all platforms.
> > > 
> > > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > > 
> > > V2: Rebased to the latest
> > > 
> > > Signed-off-by: Mika Kahola <mika.kahola@intel.com>
> > 
> > Which debugfs file shows this? Do we have one for the similar clock freqs?
> > -Chris
> > 
> 
> I don't think we have one for cdclk. Then again, should we add this to
> debugfs?

Is it useful to know? Yes, it people have added it to userspace tools.
It it derived, or variable state that we may get wrong, or are other
calculations dependent on it such that we will want to know its value to
check the results? Yes.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 05/12] drm/i915: Cache current cdclk frequency in dev_priv

[Ville Syrjälä]

On Thu, Apr 16, 2015 at 12:05:12PM +0100, Chris Wilson wrote:
> On Thu, Apr 16, 2015 at 01:51:43PM +0300, Mika Kahola wrote:
> > On Thu, 2015-04-16 at 09:02 +0100, Chris Wilson wrote:
> > > On Thu, Apr 16, 2015 at 10:40:51AM +0300, Mika Kahola wrote:
> > > > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > > > 
> > > > Rather that extracting the current cdclk freuqncy every time someone
> > > > wants to know it, cache the current value and use that. VLV/CHV already
> > > > stored a cached value there so just expand that to cover all platforms.
> > > > 
> > > > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > > > 
> > > > V2: Rebased to the latest
> > > > 
> > > > Signed-off-by: Mika Kahola <mika.kahola@intel.com>
> > > 
> > > Which debugfs file shows this? Do we have one for the similar clock freqs?
> > > -Chris
> > > 
> > 
> > I don't think we have one for cdclk. Then again, should we add this to
> > debugfs?
> 
> Is it useful to know? Yes, it people have added it to userspace tools.
> It it derived, or variable state that we may get wrong, or are other
> calculations dependent on it such that we will want to know its value to
> check the results? Yes.

Such a file should probably show the pch/hrawclk, czclk, and perhaps
memory clock too (or maybe we have that somewhere already?).

I've had plans to clean up the rawclk stuff too to resemble the cdclk
handling a bit more. The rawclk shouldn't change at runtime though,
so it should be mostly a search and replaec operation. Though we might
want to extract it for real on VLV/CHV from CCK rather than just
assuming the 100MHz (which it will be though). Similar thing could be
done for czclk as well.

-- 
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 12/12] drm/i915: BDW clock change support

[shuang.he]

Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he@intel.com)
Task id: 6211
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  276/276              276/276
ILK                                  302/302              302/302
SNB                                  318/318              318/318
IVB                                  341/341              341/341
BYT                                  287/287              287/287
HSW                                  395/395              395/395
BDW                                  318/318              318/318
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
Note: You need to pay more attention to line start with '*'
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx