[Intel-gfx] [PATCH v2 2/4] drm/i915/display: Allow fastsets when DP_SDP_VSC infoframe do not match with PSR enabled

[José Roberto de Souza]

When PSR is enabled it handles DP_SDP_VSC, changing revision and all
the other fields as necessary.
It can also enabled and disable this SDP as needed without a full
modeset.

So here masking DP_SDP_VSC bit when previous and future state PSR
enabled, it will still be checked when comparing the asked state
to what was programmed to hardware.

Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
Reported-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Fixes: 78b772e1a01f ("drm/i915/display: Fill PSR state during hardware configuration read out"
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 51f499271cc8..ebac1bd5cfe5 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8260,6 +8260,16 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	} \
 } while (0)
 
+#define PIPE_CONF_CHECK_X_WITH_MASK(name, mask) do { \
+	if ((current_config->name & (mask)) != (pipe_config->name & (mask))) { \
+		pipe_config_mismatch(fastset, crtc, __stringify(name), \
+				     "(expected 0x%08x, found 0x%08x)", \
+				     current_config->name & (mask), \
+				     pipe_config->name & (mask)); \
+		ret = false; \
+	} \
+} while (0)
+
 #define PIPE_CONF_CHECK_I(name) do { \
 	if (current_config->name != pipe_config->name) { \
 		pipe_config_mismatch(fastset, crtc, __stringify(name), \
@@ -8606,7 +8616,12 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 		PIPE_CONF_CHECK_I(min_voltage_level);
 	}
 
-	PIPE_CONF_CHECK_X(infoframes.enable);
+	if (fastset && (current_config->has_psr || pipe_config->has_psr))
+		PIPE_CONF_CHECK_X_WITH_MASK(infoframes.enable,
+					    ~intel_hdmi_infoframe_enable(DP_SDP_VSC));
+	else
+		PIPE_CONF_CHECK_X(infoframes.enable);
+
 	PIPE_CONF_CHECK_X(infoframes.gcp);
 	PIPE_CONF_CHECK_INFOFRAME(avi);
 	PIPE_CONF_CHECK_INFOFRAME(spd);
-- 
2.31.1