From: Tomi Valkeinen <tomi.valkeinen@xxxxxx> [ Upstream commit fb0629eeeedb6622c16da1aa76a4520daf9a46e2 ] The panel datasheet says that the panel samples at falling edge, but does not say anything about h/v sync signals. Testing shows that if the sync signals are driven on falling edge, the picture on the panel will be slightly shifted right. Setting sync drive edge to the same as data drive edge fixes this issue. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20191114093950.4101-4-tomi.valkeinen@xxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/panel/panel-simple.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index e14c14ac62b53..417bbe9984606 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -2464,7 +2464,8 @@ static const struct panel_desc osddisplays_osd070t1718_19ts = { .height = 91, }, .bus_format = MEDIA_BUS_FMT_RGB888_1X24, - .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE, + .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE | + DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE, .connector_type = DRM_MODE_CONNECTOR_DPI, }; -- 2.20.1
