The driver assumes that reference clock is always-enabled, but this is
hardware-dependent and not true for ASUS Transformer TF700T. Make driver
enable / disable the reference clock.
Tested-by: Andreas Westman Dorcsak <hed...@yahoo.com> # Asus TF700T
Tested-by: Maxim Schwalm <maxim.schw...@gmail.com> #TF700T
Signed-off-by: Dmitry Osipenko <dig...@gmail.com>
---
drivers/gpu/drm/bridge/tc358768.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/bridge/tc358768.c
b/drivers/gpu/drm/bridge/tc358768.c
index a3db532bbdd1..18ae6605a803 100644
--- a/drivers/gpu/drm/bridge/tc358768.c
+++ b/drivers/gpu/drm/bridge/tc358768.c
@@ -237,6 +237,10 @@ static void tc358768_hw_enable(struct tc358768_priv *priv)
if (priv->enabled)
return;
+ ret = clk_prepare_enable(priv->refclk);
+ if (ret < 0)
+ dev_err(priv->dev, "error enabling refclk (%d)\n", ret);
+
ret = regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
if (ret < 0)
dev_err(priv->dev, "error enabling regulators (%d)\n", ret);
@@ -274,6 +278,8 @@ static void tc358768_hw_disable(struct tc358768_priv *priv)
if (ret < 0)
dev_err(priv->dev, "error disabling regulators (%d)\n", ret);
+ clk_disable_unprepare(priv->refclk);
+
priv->enabled = false;
}
--
2.32.0
