[PATCH] drm/mediatek: hdmi: Filter interlaced resolutions

Bibby Hsieh
2017-01-24T05:10:04Z

Current Mediatek DRM driver does not support interlaced mode, and
will hang if such resolution is used: Filter those to prevent
kernel hangs, until the DRM driver is fixed properly.

Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_hdmi.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 0e8c4d9..e33678d 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1244,6 +1244,8 @@ static int mtk_hdmi_conn_mode_valid(struct drm_connector *conn,
return MODE_BAD;
}

+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ return MODE_NO_INTERLACE;
if (mode->clock < 27000)
return MODE_CLOCK_LOW;
if (mode->clock > 297000)
--
1.9.1