[PATCH v2 0/9] drm/i915/{dp, hdmi}: Restructure DP/HDMI sink format handling

Ville Syrjala
2026-04-09T10:15:45Z

Restructure the DP/HDMI sink format handling. I got inspired to do this
by https://lore.kernel.org/dri-devel/20260324-color-format-v11-8-605559af4fb4@collabora.com/

I envision that after this the aforementioned patch could just
become something like this:

1. s/intel_foo_compute_formats/intel_foo_compute_formats_auto/
2. Add a new intel_foo_compute_formats()

intel_foo_compute_formats()
{
switch (color_format) {
case YCBCR420:
return intel_foo_compute_output_format(YCBCR420);
case RGB:
return intel_foo_compute_output_format(RGB);
case AUTO:
return intel_foo_compute_formats_auto();
}
}

v2: A few more updates to the DP mode validation

Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Cc: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>

Ville Syrjälä (9):
drm/i915/hdmi: Add missing intel_pfit_mode_valid() for 4:2:0 also
modes
drm/i915/hdmi: Restructure the sink/output format selection
drm/i915/hdmi: Restructure 4:2:0 vs. 4:4:4 mode validation
drm/i915/dp: Restructure the sink/output format selection
drm/i915/dp: Validate "4:2:0 also" modes twice
drm/i915/dp: Require a HDMI sink for YCbCr output via PCON
drm/i915/dp: Validate sink format in .mode_valid()
drm/i915/hdmi: Make the RGB fallback for "4:2:0 only" modes the last
resort
drm/i915/dp: Make the RGB fallback for "4:2:0 only" modes the last
resort

drivers/gpu/drm/i915/display/intel_dp.c | 250 +++++++++++++---------
drivers/gpu/drm/i915/display/intel_hdmi.c | 167 +++++++++------
2 files changed, 254 insertions(+), 163 deletions(-)

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2.52.0