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drm/bridge: tc358768: Enable reference clock

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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 <hedmoo@yahoo.com> # Asus TF700T
Tested-by: Maxim Schwalm <maxim.schwalm@gmail.com> #TF700T
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211002233447.1105-2-digetx@gmail.com
This commit is contained in:
Dmitry Osipenko 2021-10-03 02:34:43 +03:00 committed by Robert Foss
parent f2d061ed01
commit 45a44b01fa
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GPG Key ID: 3EFD900F76D1D784
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/bridge/tc358768.c
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@ -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;
}