[PATCH 1/2] drm/i915/display: Avoid reading as sdp caps during each atomic commit

[Mitul Golani]

Add new member to struct intel_dp to cache support of Adaptive Sync
SDP capabilities and use it whenever required to avoid HW access
to read capability during each atomic commit.

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani at intel.com>
---
 drivers/gpu/drm/i915/display/intel_alpm.c          | 2 +-
 drivers/gpu/drm/i915/display/intel_display_types.h | 1 +
 drivers/gpu/drm/i915/display/intel_dp.c            | 3 +--
 drivers/gpu/drm/i915/display/intel_vrr.c           | 3 +--
 4 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index 866b3b409c4d..f4f05a859379 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -280,7 +280,7 @@ void intel_alpm_lobf_compute_config(struct intel_dp *intel_dp,
 	if (DISPLAY_VER(i915) < 20)
 		return;
 
-	if (!intel_dp_as_sdp_supported(intel_dp))
+	if (!intel_dp->as_sdp_supported)
 		return;
 
 	if (crtc_state->has_psr)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8713835e2307..a9d2acdc51a4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1806,6 +1806,7 @@ struct intel_dp {
 
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
+	bool as_sdp_supported;
 
 	struct drm_dp_tunnel *tunnel;
 	bool tunnel_suspended:1;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 3903f6ead6e6..c6f0a46a0388 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2625,8 +2625,7 @@ static void intel_dp_compute_as_sdp(struct intel_dp *intel_dp,
 	const struct drm_display_mode *adjusted_mode =
 		&crtc_state->hw.adjusted_mode;
 
-	if (!crtc_state->vrr.enable ||
-	    !intel_dp_as_sdp_supported(intel_dp))
+	if (!crtc_state->vrr.enable || intel_dp->as_sdp_supported)
 		return;
 
 	crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_ADAPTIVE_SYNC);
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 5a0da64c7db3..7e1d9c718214 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -233,8 +233,7 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
 		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
 	}
 
-	if (intel_dp_as_sdp_supported(intel_dp) &&
-	    crtc_state->vrr.enable) {
+	if (intel_dp->as_sdp_supported && crtc_state->vrr.enable) {
 		crtc_state->vrr.vsync_start =
 			(crtc_state->hw.adjusted_mode.crtc_vtotal -
 			 crtc_state->hw.adjusted_mode.vsync_start);
-- 
2.45.2