drm/edid: Add drm_edid_detect_panel_size()

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Add drm_edid_detect_panel_size() to extract the panel's preferred
display resolution from a given EDID. Required for setting up DRM's
panel orientation quirks in sysfb drivers.

v4:
- fix test for EDID PTD (Jani)
v3:
- mention use case in documentation (Jani)
- use is_detailed_timing_descriptor() (Jani)
- rename helper to drm_edid_detect_panel_size()
v2:
- handle EDID without pixel timing descriptor (Sashiko)
- fix checks for width and height pointers

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patch.msgid.link/20260904090850.43060-3-tzimmermann@suse.de

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This commit is contained in:

Thomas Zimmermann 2026-09-04 11:07:01 +02:00

parent 9f8bf739ed

commit 394d0759b1

2 changed files with 49 additions and 0 deletions

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47

drivers/gpu/drm/drm_edid.c

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2

include/drm/drm_edid.h

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