diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 0c0c39bac23d..767adfcb8a37 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1262,6 +1262,16 @@ struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *f } create_mode: + /* + * Synthetic mode timing is very unlikely to work on HDMI. Instead + * if there is a fallback mode, give up on trying to guess the forced + * mode timing and just let the forced mode deal with it. + */ + if (fb_helper_conn->connector->funcs->fallback_mode) { + pr_err("%s: preferring fallback mode\n", __func__); + return NULL; + } + mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, cmdline_mode); list_add(&mode->head, &fb_helper_conn->connector->modes); |