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-rw-r--r--drivers/gpu/drm/drm_probe_helper.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 0329080d7f7c..a0df377d7d1c 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -82,13 +82,30 @@ drm_mode_validate_flag(const struct drm_display_mode *mode,
static int drm_helper_probe_add_cmdline_mode(struct drm_connector *connector)
{
+ struct drm_cmdline_mode *cmdline_mode;
struct drm_display_mode *mode;
- if (!connector->cmdline_mode.specified)
+ cmdline_mode = &connector->cmdline_mode;
+ if (!cmdline_mode->specified)
return 0;
+ /* Only add a GTF mode if we find no matching probed modes */
+ list_for_each_entry(mode, &connector->probed_modes, head) {
+ if (mode->hdisplay != cmdline_mode->xres ||
+ mode->vdisplay != cmdline_mode->yres)
+ continue;
+
+ if (cmdline_mode->refresh_specified) {
+ /* The probed mode's vrefresh is set until later */
+ if (drm_mode_vrefresh(mode) != cmdline_mode->refresh)
+ continue;
+ }
+
+ return 0;
+ }
+
mode = drm_mode_create_from_cmdline_mode(connector->dev,
- &connector->cmdline_mode);
+ cmdline_mode);
if (mode == NULL)
return 0;