From c81881456f5e5c569f58a662464e7dd13c0b958a Mon Sep 17 00:00:00 2001 From: Robert Foss Date: Fri, 20 Nov 2020 13:59:25 +0100 Subject: drm/bridge: lt9611: Fix handling of 4k panels 4k requires two dsi pipes, so don't report MODE_OK when only a single pipe is configured. But rather report MODE_PANEL to signal that requirements of the panel are not being met. Reported-by: Peter Collingbourne Suggested-by: Peter Collingbourne Signed-off-by: Robert Foss Tested-by: John Stultz --- drivers/gpu/drm/bridge/lontium-lt9611.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index d734d9402c35..e8eb8deb444b 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -867,8 +867,14 @@ static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, const struct drm_display_mode *mode) { struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); - return lt9611_mode ? MODE_OK : MODE_BAD; + if (!lt9611_mode) + return MODE_BAD; + else if (lt9611_mode->intfs > 1 && !lt9611->dsi1) + return MODE_PANEL; + else + return MODE_OK; } static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) -- cgit v1.2.3