drm/sun4i: Release exclusive clock lock when disabling TCON

Currently exclusive TCON clock lock is never released, which, for
example, prevents changing resolution on HDMI.

In order to fix that, release clock when disabling TCON. TCON is always
disabled first before new mode is set.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180301213442.16677-7-jernej.skrabec@siol.net

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index b3960118deb9eb22da1134ca9525e0c87dc17275..ade197b1a9ac67aa51d3235fdb9e2a340d1da4fb 100644 (file)
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -101,10 +101,12 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel,
                return;
        }
 
-       if (enabled)
+       if (enabled) {
                clk_prepare_enable(clk);
-       else
+       } else {
+               clk_rate_exclusive_put(clk);
                clk_disable_unprepare(clk);
+       }
 }
 
 static void sun4i_tcon_lvds_set_status(struct sun4i_tcon *tcon,