drm/i915/dp: Add helper to get min sdp guardband

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Add a helper to compute vblank time needed for transmitting specific
DisplayPort SDPs like PPS, GAMUT_METADATA, and VSC_EXT. Latency is
based on line count per packet type.

This will be used to ensure adequate guardband when features like DSC/HDR
are enabled.

v2: Correct the lines required for PPS SDP. (Jouni)

Bspec: 70151
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://lore.kernel.org/r/20251017123504.2247954-3-ankit.k.nautiyal@intel.com

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Ankit Nautiyal 2025-10-17 18:05:01 +05:30

parent 77fb33cb7c

commit 52ecd48b8d

2 changed files with 38 additions and 0 deletions

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36

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

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2

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

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