When picking a mode, first look for modes that have been specified by the user on the kernel's command line. Only if that fails, use the existing heuristic of picking a nearby mode from it's various parameters.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/drm_client_modeset.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c index e6346a67cd98..b777faa87f04 100644 --- a/drivers/gpu/drm/drm_client_modeset.c +++ b/drivers/gpu/drm/drm_client_modeset.c @@ -165,6 +165,17 @@ drm_connector_pick_cmdline_mode(struct drm_connector *connector) struct drm_display_mode *mode; bool prefer_non_interlace;
+ /* + * Find a user-defined mode. If the user gave us a valid + * mode on the kernel command line, it will show up in this + * list. + */ + + list_for_each_entry(mode, &connector->modes, head) { + if (mode->type & DRM_MODE_TYPE_USERDEF) + return mode; + } + cmdline_mode = &connector->cmdline_mode; if (cmdline_mode->specified == false) return NULL;