drm/i915: Split a setting of MSA to MST and SST

The setting of MSA is done by the DDI .pre_enable() hook. And when we are
using MST, the MSA is only set to first mst stream by calling of
DDI .pre_eanble() hook. It raies issues to non-first mst streams.
Wrong MSA or missed MSA packets might show scrambled screen or wrong
screen.

This splits a setting of MSA to MST and SST cases. And In the MST case it
will call a setting of MSA after an allocating of Virtual Channel from
MST encoder pre_enable callback.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112212
Fixes: 0c06fa156006 ("drm/i915/dp: Add support of BT.2020 Colorimetry to DP MSA")
Fixes: d4a415dcda35 ("drm/i915: Fix MST oops due to MSA changes")
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191106212636.502471-1-gwan-gyeong.mun@intel.com
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
[vsyrjala: nuke spurious newline]
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 092f034..a387aea 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1794,10 +1794,8 @@ void intel_ddi_set_dp_msa(const struct intel_crtc_state *crtc_state,
         * of Color Encoding Format and Content Color Gamut] while sending
         * YCBCR 420, HDR BT.2020 signals we should program MSA MISC1 fields
         * which indicate VSC SDP for the Pixel Encoding/Colorimetry Format.
-        *
-        * FIXME MST doesn't pass in the conn_state
         */
-       if (conn_state && intel_dp_needs_vsc_sdp(crtc_state, conn_state))
+       if (intel_dp_needs_vsc_sdp(crtc_state, conn_state))
                temp |= DP_MSA_MISC_COLOR_VSC_SDP;
 
        I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
@@ -3658,7 +3656,11 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
        else
                hsw_ddi_pre_enable_dp(encoder, crtc_state, conn_state);
 
-       intel_ddi_set_dp_msa(crtc_state, conn_state);
+       /* MST will call a setting of MSA after an allocating of Virtual Channel
+        * from MST encoder pre_enable callback.
+        */
+       if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST))
+               intel_ddi_set_dp_msa(crtc_state, conn_state);
 }
 
 static void intel_ddi_pre_enable_hdmi(struct intel_encoder *encoder,

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 27494aa..21e8183 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -345,6 +345,8 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
         */
        if (INTEL_GEN(dev_priv) < 12 || !first_mst_stream)
                intel_ddi_enable_pipe_clock(pipe_config);
+
+       intel_ddi_set_dp_msa(pipe_config, conn_state);
 }
 
 static void intel_mst_enable_dp(struct intel_encoder *encoder,