drm/i915/psr: Implement Wa_14015648006

Add 4th pipe and extend TGL Wa_16013835468 to support ADLP, MTL and
DG2 and all TGL steppings.

BSpec: 54369, 55378, 66624

v3:
 - commit message modified
v2:
 - apply for PSR1 as well
 - remove stepping information from comments

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230105065637.2063311-1-jouni.hogander@intel.com

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

@@ -1111,6 +1111,8 @@ static u32 wa_16013835468_bit_get(struct intel_dp *intel_dp)
 		return LATENCY_REPORTING_REMOVED_PIPE_B;
 	case PIPE_C:
 		return LATENCY_REPORTING_REMOVED_PIPE_C;
+	case PIPE_D:
+		return LATENCY_REPORTING_REMOVED_PIPE_D;
 	default:
 		MISSING_CASE(intel_dp->psr.pipe);
 		return 0;
@@ -1162,6 +1164,23 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 			     intel_dp->psr.psr2_sel_fetch_enabled ?
 			     IGNORE_PSR2_HW_TRACKING : 0);
 
+	/*
+	 * Wa_16013835468
+	 * Wa_14015648006
+	 */
+	if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
+	    IS_DISPLAY_VER(dev_priv, 12, 13)) {
+		u16 vtotal, vblank;
+
+		vtotal = crtc_state->uapi.adjusted_mode.crtc_vtotal -
+			crtc_state->uapi.adjusted_mode.crtc_vdisplay;
+		vblank = crtc_state->uapi.adjusted_mode.crtc_vblank_end -
+			crtc_state->uapi.adjusted_mode.crtc_vblank_start;
+		if (vblank > vtotal)
+			intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0,
+				     wa_16013835468_bit_get(intel_dp));
+	}
+
 	if (intel_dp->psr.psr2_enabled) {
 		if (DISPLAY_VER(dev_priv) == 9)
 			intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
@@ -1195,20 +1214,6 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 		else if (IS_ALDERLAKE_P(dev_priv))
 			intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0,
 				     CLKGATE_DIS_MISC_DMASC_GATING_DIS);
-
-		/* Wa_16013835468:tgl[b0+], dg1 */
-		if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0, STEP_FOREVER) ||
-		    IS_DG1(dev_priv)) {
-			u16 vtotal, vblank;
-
-			vtotal = crtc_state->uapi.adjusted_mode.crtc_vtotal -
-				 crtc_state->uapi.adjusted_mode.crtc_vdisplay;
-			vblank = crtc_state->uapi.adjusted_mode.crtc_vblank_end -
-				 crtc_state->uapi.adjusted_mode.crtc_vblank_start;
-			if (vblank > vtotal)
-				intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0,
-					     wa_16013835468_bit_get(intel_dp));
-		}
 	}
 }
 
@@ -1361,6 +1366,15 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
 		intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
 			     DIS_RAM_BYPASS_PSR2_MAN_TRACK, 0);
 
+	/*
+	 * Wa_16013835468
+	 * Wa_14015648006
+	 */
+	if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
+	    IS_DISPLAY_VER(dev_priv, 12, 13))
+		intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1,
+			     wa_16013835468_bit_get(intel_dp), 0);
+
 	if (intel_dp->psr.psr2_enabled) {
 		/* Wa_16011168373:adl-p */
 		if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
@@ -1376,12 +1390,6 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
 		else if (IS_ALDERLAKE_P(dev_priv))
 			intel_de_rmw(dev_priv, CLKGATE_DIS_MISC,
 				     CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
-
-		/* Wa_16013835468:tgl[b0+], dg1 */
-		if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0, STEP_FOREVER) ||
-		    IS_DG1(dev_priv))
-			intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1,
-				     wa_16013835468_bit_get(intel_dp), 0);
 	}
 
 	intel_snps_phy_update_psr_power_state(dev_priv, phy, false);

drivers/gpu/drm/i915/i915_reg.h

@@ -5734,6 +5734,7 @@
 #define  RESET_PCH_HANDSHAKE_ENABLE	REG_BIT(4)
 
 #define GEN8_CHICKEN_DCPR_1			_MMIO(0x46430)
+#define   LATENCY_REPORTING_REMOVED_PIPE_D	REG_BIT(31)
 #define   SKL_SELECT_ALTERNATE_DC_EXIT		REG_BIT(30)
 #define   LATENCY_REPORTING_REMOVED_PIPE_C	REG_BIT(25)
 #define   LATENCY_REPORTING_REMOVED_PIPE_B	REG_BIT(24)