[PATCH AUTOSEL 4.19 017/101] drm/bridge: tc358767: read display_props in get_modes()

[Sasha Levin]

From: Tomi Valkeinen <tomi.valkeinen@xxxxxx>

[ Upstream commit 3231573065ad4f4ecc5c9147b24f29f846dc0c2f ]

We need to know the link bandwidth to filter out modes we cannot
support, so we need to have read the display props before doing the
filtering.

To ensure we have up to date display props, call tc_get_display_props()
in the beginning of tc_connector_get_modes().

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20190528082747.3631-22-tomi.valkeinen@xxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/bridge/tc358767.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 391547358756..aaca5248da07 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1149,6 +1149,13 @@ static int tc_connector_get_modes(struct drm_connector *connector)
 	struct tc_data *tc = connector_to_tc(connector);
 	struct edid *edid;
 	unsigned int count;
+	int ret;
+
+	ret = tc_get_display_props(tc);
+	if (ret < 0) {
+		dev_err(tc->dev, "failed to read display props: %d\n", ret);
+		return 0;
+	}
 
 	if (tc->panel && tc->panel->funcs && tc->panel->funcs->get_modes) {
 		count = tc->panel->funcs->get_modes(tc->panel);
-- 
2.20.1