drm: ignore EDID with really tiny modes.

Some EDIDs lie and report tiny modes that aren't possible. Ignore these modes. Signed-off-by: Adam Jackson <[email protected]> Signed-off-by: Dave Airlie <[email protected]>
mrcsosa · Jun 4, 2009 · fc43896 · fc43896
1 parent 6c51d1c
commit fc43896
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
@@ -289,6 +289,11 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
 	struct drm_display_mode *mode;
 	struct detailed_pixel_timing *pt = &timing->data.pixel_data;
 
+	/* ignore tiny modes */
+	if (((pt->hactive_hi << 8) | pt->hactive_lo) < 64 ||
+	    ((pt->vactive_hi << 8) | pt->hactive_lo) < 64)
+		return NULL;
+
 	if (pt->stereo) {
 		printk(KERN_WARNING "stereo mode not supported\n");
 		return NULL;