drm: bridge/dw_hdmi: don't support any pixel doubled modes

As mentioned in the previous commit, the dw-hdmi driver does not support
pixel doubled modes at present; it does not configure the PLL correctly
for these modes.  Therefore, filter out the double-clocked modes as we
presently are unable to support them.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 1c0ee3476138..8edf4c31f55c 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1448,6 +1448,10 @@ dw_hdmi_connector_mode_valid(struct drm_connector *connector,
                                            struct dw_hdmi, connector);
         enum drm_mode_status mode_status = MODE_OK;
 
+        /* We don't support double-clocked modes */
+        if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+                return MODE_BAD;
+
         if (hdmi->plat_data->mode_valid)
                 mode_status = hdmi->plat_data->mode_valid(connector, mode);