[PATCH] drm/vc4: Fix with pm_runtime synchronization on DSI

[Hoegeun Kwon]

There is a problem when often dpms goes from off to on. pm idle is not
in sync and the problem occurs. Modify pm_runtime_put from
asynchronous to synchronous.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon at samsung.com>
---
 drivers/gpu/drm/vc4/vc4_dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 11702e1d9011..b0264c7b8bed 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -822,7 +822,7 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder)
 	clk_disable_unprepare(dsi->escape_clock);
 	clk_disable_unprepare(dsi->pixel_clock);
 
-	pm_runtime_put(dev);
+	pm_runtime_put_sync(dev);
 }
 
 /* Extends the mode's blank intervals to handle BCM2835's integer-only
-- 
2.17.1