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drm/amd/display: do not copy invalid CRTC timing info

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Since b255ce4388, it is possible that the CRTC timing
information for the preferred mode has not yet been
calculated while amdgpu_dm_connector_mode_valid() is running.

In this case use the CRTC timing information of the actual mode.

Fixes: b255ce4388 ("drm/amdgpu: don't change mode in amdgpu_dm_connector_mode_valid()")
Closes: https://lore.kernel.org/all/ed09edb167e74167a694f4854102a3de6d2f1433.camel@irl.hu/
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4085
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Reviewed-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Gergo Koteles
2025-04-02 19:03:31 +02:00
committed by Alex Deucher
parent 33bc89949b
commit 20232192a5
1 changed files with 6 additions and 6 deletions
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12
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -6588,12 +6588,12 @@ decide_crtc_timing_for_drm_display_mode(struct drm_display_mode *drm_mode,
const struct drm_display_mode *native_mode,
bool scale_enabled)
{
if (scale_enabled) {
copy_crtc_timing_for_drm_display_mode(native_mode, drm_mode);
} else if (native_mode->clock == drm_mode->clock &&
native_mode->htotal == drm_mode->htotal &&
native_mode->vtotal == drm_mode->vtotal) {
copy_crtc_timing_for_drm_display_mode(native_mode, drm_mode);
if (scale_enabled || (
native_mode->clock == drm_mode->clock &&
native_mode->htotal == drm_mode->htotal &&
native_mode->vtotal == drm_mode->vtotal)) {
if (native_mode->crtc_clock)
copy_crtc_timing_for_drm_display_mode(native_mode, drm_mode);
} else {
/* no scaling nor amdgpu inserted, no need to patch */
}