drm/i915/dp: set VSC_SDP MSA delegation only for capable sinks

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Per DP 1.4a section 2.2.4.3, the MSA MISC1 VSC_SDP bit signals that
the sink should defer colorimetry to the VSC SDP. It should only be set
when the sink advertises DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED and a
VSC SDP with pixel encoding/colorimetry payload will actually be sent.

Fold the colorimetry_support check into intel_dp_needs_vsc_colorimetry()
so both intel_ddi_set_dp_msa() and intel_dp_compute_vsc_sdp() share a
single consistent gate.

Assisted-by: GitHub_Copilot:claude-sonnet-4.6
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Pranay Samala <pranay.samala@intel.com>
Link: https://patch.msgid.link/20260709113951.3557968-3-chaitanya.kumar.borah@intel.com

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Chaitanya Kumar Borah 2026-07-09 17:09:51 +05:30

parent a0e6549031

commit 6d7efb5fbb

2 changed files with 12 additions and 4 deletions

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2

drivers/gpu/drm/i915/display/intel_ddi.c

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14

drivers/gpu/drm/i915/display/intel_dp.c

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