[Intel-gfx] [PATCH 1/2] drm/i915/display: Group PSR2 prog sequences and workarounds

[José Roberto de Souza]

Grouping inside of the same if all the programing sequences and
workarounds of PSR2.
The order of programing changed in intel_psr_enable_source() but
it will not affect PSR2 as at this point PSR2_ENABLE is still disabled.

Cc: Jouni Högander <jouni.hogander at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 77 ++++++++++++------------
 1 file changed, 37 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index a1a663f362e7d..72bd8d3261e0c 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1069,25 +1069,6 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
 	enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
 	u32 mask;
 
-	if (intel_dp->psr.psr2_enabled && DISPLAY_VER(dev_priv) == 9) {
-		i915_reg_t reg = CHICKEN_TRANS(cpu_transcoder);
-		u32 chicken = intel_de_read(dev_priv, reg);
-
-		chicken |= PSR2_VSC_ENABLE_PROG_HEADER |
-			   PSR2_ADD_VERTICAL_LINE_COUNT;
-		intel_de_write(dev_priv, reg, chicken);
-	}
-
-	/*
-	 * Wa_16014451276:adlp
-	 * 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) &&
-	    intel_dp->psr.psr2_enabled)
-		intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
-			     ADLP_1_BASED_X_GRANULARITY);
-
 	/*
 	 * Per Spec: Avoid continuous PSR exit by masking MEMUP and HPD also
 	 * mask LPSP to avoid dependency on other drivers that might block
@@ -1126,18 +1107,33 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
 			     intel_dp->psr.psr2_sel_fetch_enabled ?
 			     IGNORE_PSR2_HW_TRACKING : 0);
 
-	/* Wa_16011168373:adl-p */
-	if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) &&
-	    intel_dp->psr.psr2_enabled)
-		intel_de_rmw(dev_priv,
-			     TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
-			     TRANS_SET_CONTEXT_LATENCY_MASK,
-			     TRANS_SET_CONTEXT_LATENCY_VALUE(1));
+	if (intel_dp->psr.psr2_enabled) {
+		if (DISPLAY_VER(dev_priv) == 9)
+			intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
+				     PSR2_VSC_ENABLE_PROG_HEADER |
+				     PSR2_ADD_VERTICAL_LINE_COUNT);
 
-	/* Wa_16012604467:adlp */
-	if (IS_ALDERLAKE_P(dev_priv) && intel_dp->psr.psr2_enabled)
-		intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0,
-			     CLKGATE_DIS_MISC_DMASC_GATING_DIS);
+		/*
+		 * Wa_16014451276:adlp
+		 * 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))
+			intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
+				     ADLP_1_BASED_X_GRANULARITY);
+
+		/* Wa_16011168373:adl-p */
+		if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+			intel_de_rmw(dev_priv,
+				     TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
+				     TRANS_SET_CONTEXT_LATENCY_MASK,
+				     TRANS_SET_CONTEXT_LATENCY_VALUE(1));
+
+		/* Wa_16012604467:adlp */
+		if (IS_ALDERLAKE_P(dev_priv))
+			intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0,
+				     CLKGATE_DIS_MISC_DMASC_GATING_DIS);
+	}
 }
 
 static bool psr_interrupt_error_check(struct intel_dp *intel_dp)
@@ -1290,17 +1286,18 @@ 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_16011168373:adl-p */
-	if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) &&
-	    intel_dp->psr.psr2_enabled)
-		intel_de_rmw(dev_priv,
-			     TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
-			     TRANS_SET_CONTEXT_LATENCY_MASK, 0);
+	if (intel_dp->psr.psr2_enabled) {
+		/* Wa_16011168373:adl-p */
+		if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+			intel_de_rmw(dev_priv,
+				     TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
+				     TRANS_SET_CONTEXT_LATENCY_MASK, 0);
 
-	/* Wa_16012604467:adlp */
-	if (IS_ALDERLAKE_P(dev_priv) && intel_dp->psr.psr2_enabled)
-		intel_de_rmw(dev_priv, CLKGATE_DIS_MISC,
-			     CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
+		/* Wa_16012604467:adlp */
+		if (IS_ALDERLAKE_P(dev_priv))
+			intel_de_rmw(dev_priv, CLKGATE_DIS_MISC,
+				     CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
+	}
 
 	intel_snps_phy_update_psr_power_state(dev_priv, phy, false);
 
-- 
2.35.1