drm/edid: Fix the HDTV hack.

Standard timings don't let you say 1366.  Both 1360 and 1368 have been
seen in the wild.  So invent a CVT timing for it.  CVT will round 1366 up
to 1368; we'll then manually underscan it.

Split this into two parts, since we need to do something sneaky between
them in the future.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index e746dd56658a..d7214389c2d6 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -765,15 +765,25 @@ struct drm_display_mode *drm_mode_std(struct drm_device *dev,
                 vsize = (hsize * 4) / 5;
         else
                 vsize = (hsize * 9) / 16;
-        /* HDTV hack */
-        if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
-                mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
+
+        /* HDTV hack, part 1 */
+        if (vrefresh_rate == 60 &&
+            ((hsize == 1360 && vsize == 765) ||
+             (hsize == 1368 && vsize == 769))) {
+                hsize = 1366;
+                vsize = 768;
+        }
+
+        /* HDTV hack, part 2 */
+        if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
+                mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
                                     false);
                 mode->hdisplay = 1366;
                 mode->vsync_start = mode->vsync_start - 1;
                 mode->vsync_end = mode->vsync_end - 1;
                 return mode;
         }
+
         mode = NULL;
         /* check whether it can be found in default mode table */
         mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);