drm/i915/dg1: Add initial DG1 workarounds

DG1 shares some workarounds with TGL and RKL and also has some
additional workarounds of its own.

v2: Correct location of Wa_1408615072 (JohnH).
v3: Apply WAs 1606700617, 18011464164 and 22010931296 to DG1 (José)
v4 (Anusha)
  - Add Wa_22010271021
  - s/Wa_14010096844/Wa_1409836686
v5:
  - Extend Wa_14010919138 to all revs (Matt Atwood)
  - Power gate media is global gen12 design. (Rodrigo)
  - Rebase (Lucas)
v6: use REG_BIT() to fix checkpatch warning (Lucas)

BSpec: 53508

Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201014191937.1266226-8-lucas.demarchi@intel.com

1 files changed, 26 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 8cd62402d597..ae6b367e63cb 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7116,25 +7116,26 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
 			 0, CNL_DELAY_PMRSP);
 }
 
-static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
+static void gen12_init_clock_gating(struct drm_i915_private *i915)
 {
-	u32 vd_pg_enable = 0;
 	unsigned int i;
 
+	/* This is not a WA. Enable VD HCP & MFX_ENC powergate */
+	for (i = 0; i < I915_MAX_VCS; i++)
+		if (HAS_ENGINE(&i915->gt, _VCS(i)))
+			intel_uncore_rmw(&i915->uncore, POWERGATE_ENABLE, 0,
+					 VDN_HCP_POWERGATE_ENABLE(i) |
+					 VDN_MFX_POWERGATE_ENABLE(i));
+}
+
+static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
+{
+	gen12_init_clock_gating(dev_priv);
+
 	/* Wa_1409120013:tgl */
 	I915_WRITE(ILK_DPFC_CHICKEN,
 		   ILK_DPFC_CHICKEN_COMP_DUMMY_PIXEL);
 
-	/* This is not a WA. Enable VD HCP & MFX_ENC powergate */
-	for (i = 0; i < I915_MAX_VCS; i++) {
-		if (HAS_ENGINE(&dev_priv->gt, _VCS(i)))
-			vd_pg_enable |= VDN_HCP_POWERGATE_ENABLE(i) |
-					VDN_MFX_POWERGATE_ENABLE(i);
-	}
-
-	I915_WRITE(POWERGATE_ENABLE,
-		   I915_READ(POWERGATE_ENABLE) | vd_pg_enable);
-
 	/* Wa_1409825376:tgl (pre-prod)*/
 	if (IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_B1))
 		I915_WRITE(GEN9_CLKGATE_DIS_3, I915_READ(GEN9_CLKGATE_DIS_3) |
@@ -7145,6 +7146,16 @@ static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
 			 0, DFR_DISABLE);
 }
 
+static void dg1_init_clock_gating(struct drm_i915_private *dev_priv)
+{
+	gen12_init_clock_gating(dev_priv);
+
+	/* Wa_1409836686:dg1[a0] */
+	if (IS_DG1_REVID(dev_priv, DG1_REVID_A0, DG1_REVID_A0))
+		I915_WRITE(GEN9_CLKGATE_DIS_3, I915_READ(GEN9_CLKGATE_DIS_3) |
+			   DPT_GATING_DIS);
+}
+
 static void cnp_init_clock_gating(struct drm_i915_private *dev_priv)
 {
 	if (!HAS_PCH_CNP(dev_priv))
@@ -7590,7 +7601,9 @@ static void nop_init_clock_gating(struct drm_i915_private *dev_priv)
  */
 void intel_init_clock_gating_hooks(struct drm_i915_private *dev_priv)
 {
-	if (IS_GEN(dev_priv, 12))
+	if (IS_DG1(dev_priv))
+		dev_priv->display.init_clock_gating = dg1_init_clock_gating;
+	else if (IS_GEN(dev_priv, 12))
 		dev_priv->display.init_clock_gating = tgl_init_clock_gating;
 	else if (IS_GEN(dev_priv, 11))
 		dev_priv->display.init_clock_gating = icl_init_clock_gating;