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drm: bridge: dw-hdmi: Check whether hdmi is initialized when hdmi suspend or resume

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Hdmi suspend or resume may be called before hdmi initialization. We must
verify that hdmi is initialized first.

Change-Id: I2a680209e64b9c1aebc2d9ee19d543927137afd0
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
This commit is contained in:
Algea Cao
2019-01-03 10:50:33 +08:00
committed by Tao Huang
parent 7139db635b
commit 30948dc13f
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -3900,6 +3900,11 @@ void dw_hdmi_suspend(struct device *dev)
{
struct dw_hdmi *hdmi = dev_get_drvdata(dev);
if (!hdmi) {
dev_warn(dev, "Hdmi has not been initialized\n");
return;
}
mutex_lock(&hdmi->mutex);
/*
@@ -3927,6 +3932,11 @@ void dw_hdmi_resume(struct device *dev)
{
struct dw_hdmi *hdmi = dev_get_drvdata(dev);
if (!hdmi) {
dev_warn(dev, "Hdmi has not been initialized\n");
return;
}
pinctrl_pm_select_default_state(dev);
mutex_lock(&hdmi->mutex);
dw_hdmi_reg_initial(hdmi);