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drm: Always warn if user-defined modes are not supported

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Print a warning if a user-specifed display mode is not supported by
the display pipeline. Users specified the display mode on the kernel
command line with the use of the video= parameter. Setting an
unsupported mode will leave the console blank, so we should at least
let the user know why.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220511183125.14294-2-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-05-11 20:31:23 +02:00
parent 98526c5bbe
commit b6415bd738
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/drm_modes.c
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@ -1328,6 +1328,10 @@ void drm_mode_prune_invalid(struct drm_device *dev,
list_for_each_entry_safe(mode, t, mode_list, head) {
if (mode->status != MODE_OK) {
list_del(&mode->head);
if (mode->type & DRM_MODE_TYPE_USERDEF) {
drm_warn(dev, "User-defined mode not supported: "
DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
}
if (verbose) {
drm_mode_debug_printmodeline(mode);
DRM_DEBUG_KMS("Not using %s mode: %s\n",