[Intel-gfx] [Patch v2] drm/i915/mtl: Initial display workarounds

[Matt Atwood]

From: Jouni Högander <jouni.hogander at intel.com>

This patch introduces initial workarounds for mtl platform

v2: switch IS_MTL_DISPLAY_STEP to use IS_METEORLAKE from testing display
ver. (Tvrtko)

Bspec: 66624

Signed-off-by: Matt Atwood <matthew.s.atwood at intel.com>
Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c  |  4 +++-
 drivers/gpu/drm/i915/display/intel_hdmi.c |  3 ++-
 drivers/gpu/drm/i915/display/intel_psr.c  | 27 ++++++++++++++++-------
 drivers/gpu/drm/i915/i915_drv.h           |  4 ++++
 4 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index b5ee5ea0d010..8f269553d826 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1095,7 +1095,9 @@ static int intel_fbc_check_plane(struct intel_atomic_state *state,
 	}
 
 	/* Wa_14016291713 */
-	if (IS_DISPLAY_VER(i915, 12, 13) && crtc_state->has_psr) {
+	if ((IS_DISPLAY_VER(i915, 12, 13) ||
+	     IS_MTL_DISPLAY_STEP(i915, STEP_A0, STEP_C0)) &&
+	    crtc_state->has_psr) {
 		plane_state->no_fbc_reason = "PSR1 enabled (Wa_14016291713)";
 		return 0;
 	}
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index e82f8a07e2b0..efa2da080f62 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -537,7 +537,8 @@ void hsw_write_infoframe(struct intel_encoder *encoder,
 			       0);
 
 	/* Wa_14013475917 */
-	if (DISPLAY_VER(dev_priv) == 13 && crtc_state->has_psr &&
+	if ((DISPLAY_VER(dev_priv) == 13 ||
+	     IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0)) && crtc_state->has_psr &&
 	    type == DP_SDP_VSC)
 		return;
 
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 5b678916e6db..7982157fb1ff 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -797,7 +797,7 @@ static bool psr2_granularity_check(struct intel_dp *intel_dp,
 		return intel_dp->psr.su_y_granularity == 4;
 
 	/*
-	 * adl_p and display 14+ platforms has 1 line granularity.
+	 * adl_p and mtl platforms has 1 line granularity.
 	 * For other platforms with SW tracking we can adjust the y coordinates
 	 * to match sink requirement if multiple of 4.
 	 */
@@ -1170,11 +1170,14 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 				     PSR2_ADD_VERTICAL_LINE_COUNT);
 
 		/*
-		 * Wa_16014451276:adlp
+		 * Wa_16014451276:adlp,mtl[a0,b0]
 		 * All supported adlp panels have 1-based X granularity, this may
 		 * cause issues if non-supported panels are used.
 		 */
-		if (IS_ALDERLAKE_P(dev_priv))
+		if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+			intel_de_rmw(dev_priv, MTL_CHICKEN_TRANS(cpu_transcoder), 0,
+				     ADLP_1_BASED_X_GRANULARITY);
+		else if (IS_ALDERLAKE_P(dev_priv))
 			intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
 				     ADLP_1_BASED_X_GRANULARITY);
 
@@ -1185,8 +1188,12 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 				     TRANS_SET_CONTEXT_LATENCY_MASK,
 				     TRANS_SET_CONTEXT_LATENCY_VALUE(1));
 
-		/* Wa_16012604467:adlp */
-		if (IS_ALDERLAKE_P(dev_priv))
+		/* Wa_16012604467:adlp,mtl[a0,b0] */
+		if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+			intel_de_rmw(dev_priv,
+				     MTL_CLKGATE_DIS_TRANS(cpu_transcoder), 0,
+				     MTL_CLKGATE_DIS_TRANS_DMASC_GATING_DIS);
+		else if (IS_ALDERLAKE_P(dev_priv))
 			intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0,
 				     CLKGATE_DIS_MISC_DMASC_GATING_DIS);
 
@@ -1362,8 +1369,12 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
 				     TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
 				     TRANS_SET_CONTEXT_LATENCY_MASK, 0);
 
-		/* Wa_16012604467:adlp */
-		if (IS_ALDERLAKE_P(dev_priv))
+		/* Wa_16012604467:adlp,mtl[a0,b0] */
+		if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+			intel_de_rmw(dev_priv,
+				     MTL_CLKGATE_DIS_TRANS(intel_dp->psr.transcoder),
+				     MTL_CLKGATE_DIS_TRANS_DMASC_GATING_DIS, 0);
+		else if (IS_ALDERLAKE_P(dev_priv))
 			intel_de_rmw(dev_priv, CLKGATE_DIS_MISC,
 				     CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
 
@@ -1625,7 +1636,7 @@ static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
 
 	if (full_update) {
 		/*
-		 * Not applying Wa_14014971508:adlp as we do not support the
+		 * Not applying Wa_14014971508:adlp,mtl as we do not support the
 		 * feature that requires this workaround.
 		 */
 		val |= man_trk_ctl_single_full_frame_bit_get(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a8a5bd426e78..0ad206f76b7b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -727,6 +727,10 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 	(IS_SUBPLATFORM(__i915, INTEL_METEORLAKE, INTEL_SUBPLATFORM_##variant) && \
 	 IS_GRAPHICS_STEP(__i915, since, until))
 
+#define IS_MTL_DISPLAY_STEP(__i915, since, until) \
+	(IS_METEORLAKE(__i915) && \
+	 IS_DISPLAY_STEP(__i915, since, until))
+
 /*
  * DG2 hardware steppings are a bit unusual.  The hardware design was forked to
  * create three variants (G10, G11, and G12) which each have distinct
-- 
2.38.1