drm/edid: Add support for quirks visible to DRM core and drivers

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Add support for EDID based quirks which can be queried outside of the
EDID parser iteself by DRM core and drivers. There are at least two such
quirks applicable to all drivers: the DPCD register access probe quirk
and the 128b/132b DPRX Lane Count Conversion quirk (see 3.5.2.16.3 in
the v2.1a DP Standard). The latter quirk applies to panels with specific
EDID panel names, support for defining a quirk this way will be added as
a follow-up.

v2: Reset global_quirks in drm_reset_display_info().
v3: (Jani)
- Use one list for both the global and internal quirks.
- Drop change for panel name specific quirks.
- Add comment about the way quirks should be queried.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/20250605082850.65136-4-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2025-06-05 11:28:48 +03:00

parent 5281cbe0b5

commit 0b4aa85e89

3 changed files with 15 additions and 2 deletions

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8

drivers/gpu/drm/drm_edid.c

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4

include/drm/drm_connector.h

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5

include/drm/drm_edid.h

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