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omapdrm: hdmi4: refcount hdmi_power_on/off_core

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The hdmi_power_on/off_core functions can be called multiple times:
when the HPD changes and when the HDMI CEC support needs to power
the HDMI core.

So use a counter to know when to really power on or off the HDMI core.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Hans Verkuil 2017-08-02 10:54:05 +02:00 committed by Tomi Valkeinen
parent 1d54ecf230
commit a141a29612
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/omapdrm/dss/hdmi4.c
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@ -124,9 +124,12 @@ static int hdmi_power_on_core(struct omap_dss_device *dssdev)
{
int r;
if (hdmi.core.core_pwr_cnt++)
return 0;
r = regulator_enable(hdmi.vdda_reg);
if (r)
return r;
goto err_reg_enable;
r = hdmi_runtime_get();
if (r)
@ -143,12 +146,17 @@ static int hdmi_power_on_core(struct omap_dss_device *dssdev)
err_runtime_get:
regulator_disable(hdmi.vdda_reg);
err_reg_enable:
hdmi.core.core_pwr_cnt--;
return r;
}
static void hdmi_power_off_core(struct omap_dss_device *dssdev)
{
if (--hdmi.core.core_pwr_cnt)
return;
hdmi.core_enabled = false;
hdmi_runtime_put();