drm/ast: Find VBIOS mode from regular display size

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[ Upstream commit c81202906b ]

The ast driver looks up supplied display modes from an internal list of
display modes supported by the VBIOS.

Do not use the crtc_-prefixed display values from struct drm_display_mode
for looking up the VBIOS mode. The fields contain raw values that the
driver programs to hardware. They are affected by display settings like
double-scan or interlace.

Instead use the regular vdisplay and hdisplay fields for lookup. As the
programmed values can now differ from the values used for lookup, set
struct drm_display_mode.crtc_vdisplay and .crtc_hdisplay from the VBIOS
mode.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250131092257.115596-9-tzimmermann@suse.de
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Thomas Zimmermann 2025-01-31 10:21:08 +01:00 • committed by Greg Kroah-Hartman

parent d6fd1eee07

commit 164beeabcb

1 changed files with 6 additions and 4 deletions

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drivers/gpu/drm/ast/ast_mode.c

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