[PATCH v5 13/18] drm/i915: Add state readout for DP VSC SDP

[Gwan-gyeong Mun]

Added state readout for DP VSC SDP and enabled state validation
for DP VSC SDP.

v2: Minor style fix
v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
v4: Use struct drm_device logging macros

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong....@intel.com>
Reviewed-by: Uma Shankar <uma.shan...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c     |  1 +
 drivers/gpu/drm/i915/display/intel_display.c | 43 ++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c 
b/drivers/gpu/drm/i915/display/intel_ddi.c
index 55eacc4d75bb..7f29b08ea202 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4367,6 +4367,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
                             &pipe_config->infoframes.drm);
 
        intel_read_dp_sdp(encoder, pipe_config, 
HDMI_PACKET_TYPE_GAMUT_METADATA);
+       intel_read_dp_sdp(encoder, pipe_config, DP_SDP_VSC);
 }
 
 static enum intel_output_type
diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index e3694e499b28..c11898cc1b50 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13634,6 +13634,13 @@ intel_compare_infoframe(const union hdmi_infoframe *a,
        return memcmp(a, b, sizeof(*a)) == 0;
 }
 
+static bool
+intel_compare_dp_vsc_sdp(const struct drm_dp_vsc_sdp *a,
+                        const struct drm_dp_vsc_sdp *b)
+{
+       return memcmp(a, b, sizeof(*a)) == 0;
+}
+
 static void
 pipe_config_infoframe_mismatch(struct drm_i915_private *dev_priv,
                               bool fastset, const char *name,
@@ -13659,6 +13666,31 @@ pipe_config_infoframe_mismatch(struct drm_i915_private 
*dev_priv,
        }
 }
 
+static void
+pipe_config_dp_vsc_sdp_mismatch(struct drm_i915_private *dev_priv,
+                               bool fastset, const char *name,
+                               const struct drm_dp_vsc_sdp *a,
+                               const struct drm_dp_vsc_sdp *b)
+{
+       if (fastset) {
+               if (!drm_debug_enabled(DRM_UT_KMS))
+                       return;
+
+               drm_dbg_kms(&dev_priv->drm,
+                           "fastset mismatch in %s dp sdp\n", name);
+               drm_dbg_kms(&dev_priv->drm, "expected:\n");
+               drm_dp_vsc_sdp_log(KERN_DEBUG, dev_priv->drm.dev, a);
+               drm_dbg_kms(&dev_priv->drm, "found:\n");
+               drm_dp_vsc_sdp_log(KERN_DEBUG, dev_priv->drm.dev, b);
+       } else {
+               drm_err(&dev_priv->drm, "mismatch in %s dp sdp\n", name);
+               drm_err(&dev_priv->drm, "expected:\n");
+               drm_dp_vsc_sdp_log(KERN_ERR, dev_priv->drm.dev, a);
+               drm_err(&dev_priv->drm, "found:\n");
+               drm_dp_vsc_sdp_log(KERN_ERR, dev_priv->drm.dev, b);
+       }
+}
+
 static void __printf(4, 5)
 pipe_config_mismatch(bool fastset, const struct intel_crtc *crtc,
                     const char *name, const char *format, ...)
@@ -13860,6 +13892,16 @@ intel_pipe_config_compare(const struct 
intel_crtc_state *current_config,
        } \
 } while (0)
 
+#define PIPE_CONF_CHECK_DP_VSC_SDP(name) do { \
+       if (!intel_compare_dp_vsc_sdp(&current_config->infoframes.name, \
+                                     &pipe_config->infoframes.name)) { \
+               pipe_config_dp_vsc_sdp_mismatch(dev_priv, fastset, 
__stringify(name), \
+                                               
&current_config->infoframes.name, \
+                                               &pipe_config->infoframes.name); 
\
+               ret = false; \
+       } \
+} while (0)
+
 #define PIPE_CONF_CHECK_COLOR_LUT(name1, name2, bit_precision) do { \
        if (current_config->name1 != pipe_config->name1) { \
                pipe_config_mismatch(fastset, crtc, __stringify(name1), \
@@ -14035,6 +14077,7 @@ intel_pipe_config_compare(const struct intel_crtc_state 
*current_config,
        PIPE_CONF_CHECK_INFOFRAME(spd);
        PIPE_CONF_CHECK_INFOFRAME(hdmi);
        PIPE_CONF_CHECK_INFOFRAME(drm);
+       PIPE_CONF_CHECK_DP_VSC_SDP(vsc);
 
        PIPE_CONF_CHECK_X(sync_mode_slaves_mask);
        PIPE_CONF_CHECK_I(master_transcoder);
-- 
2.24.1

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