[Intel-gfx] [PATCH v2 1/3] drm/i915/psr: Fix Wa_16013835468 and Wa_14015648006

[Jouni Högander]

PSR WM optimization should be disabled based on any wm level being
disabled. Currently it's disabled always when using delayed vblank.

Bspec: 71580

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_types.h |  1 +
 drivers/gpu/drm/i915/display/intel_psr.c           | 12 +++++-------
 drivers/gpu/drm/i915/display/skl_watermark.c       |  7 +++++--
 3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index c32bfba06ca1..60504c390408 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1152,6 +1152,7 @@ struct intel_crtc_state {
 	bool has_psr2;
 	bool enable_psr2_sel_fetch;
 	bool req_psr2_sdp_prior_scanline;
+	bool wm_level_disabled;
 	u32 dc3co_exitline;
 	u16 su_y_granularity;
 	struct drm_dp_vsc_sdp psr_vsc;
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 44610b20cd29..a6edd65b8edb 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1177,13 +1177,11 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 	 * Wa_16013835468
 	 * Wa_14015648006
 	 */
-	if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
-	    IS_DISPLAY_VER(dev_priv, 12, 13)) {
-		if (crtc_state->hw.adjusted_mode.crtc_vblank_start !=
-		    crtc_state->hw.adjusted_mode.crtc_vdisplay)
-			intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0,
-				     wa_16013835468_bit_get(intel_dp));
-	}
+	if ((IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
+	     IS_DISPLAY_VER(dev_priv, 12, 13)) &&
+	    crtc_state->wm_level_disabled)
+		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)
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index 50a9a6adbe32..afb751c024ba 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -2273,9 +2273,12 @@ static int skl_wm_check_vblank(struct intel_crtc_state *crtc_state)
 		return level;
 
 	/*
-	 * FIXME PSR needs to toggle LATENCY_REPORTING_REMOVED_PIPE_*
+	 * PSR needs to toggle LATENCY_REPORTING_REMOVED_PIPE_*
 	 * based on whether we're limited by the vblank duration.
-	 *
+	 */
+	crtc_state->wm_level_disabled = level < i915->display.wm.num_levels - 1;
+
+	/*
 	 * FIXME also related to skl+ w/a 1136 (also unimplemented as of
 	 * now) perhaps?
 	 */
-- 
2.34.1