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OMAPDSS: HDMI: Replace spinlock with mutex in hdmi_check_hpd_state

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State change of HDMI PHY could potentially take many millisecs, we can do
better by protecting things in hdmi_set_phy_pwr() with a mutex rather than
a spin_lock_irqsave.

Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Jassi Brar 2012-06-27 19:34:56 +05:30 committed by Tomi Valkeinen
parent ece2f1539e
commit 3a5383a237
3 changed files with 4 additions and 5 deletions
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1
drivers/video/omap2/dss/hdmi.c
View File

@ -758,6 +758,7 @@ static int __init omapdss_hdmihw_probe(struct platform_device *pdev)
hdmi.ip_data.core_av_offset = HDMI_CORE_AV;
hdmi.ip_data.pll_offset = HDMI_PLLCTRL;
hdmi.ip_data.phy_offset = HDMI_PHY;
mutex_init(&hdmi.ip_data.lock);
hdmi_panel_init();

1
drivers/video/omap2/dss/ti_hdmi.h
View File

@ -177,6 +177,7 @@ struct hdmi_ip_data {
/* ti_hdmi_4xxx_ip private data. These should be in a separate struct */
int hpd_gpio;
struct mutex lock;
};
int ti_hdmi_4xxx_phy_enable(struct hdmi_ip_data *ip_data);
void ti_hdmi_4xxx_phy_disable(struct hdmi_ip_data *ip_data);

7
drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
View File

@ -235,13 +235,10 @@ void ti_hdmi_4xxx_pll_disable(struct hdmi_ip_data *ip_data)
static int hdmi_check_hpd_state(struct hdmi_ip_data *ip_data)
{
unsigned long flags;
bool hpd;
int r;
/* this should be in ti_hdmi_4xxx_ip private data */
static DEFINE_SPINLOCK(phy_tx_lock);
spin_lock_irqsave(&phy_tx_lock, flags);
mutex_lock(&ip_data->lock);
hpd = gpio_get_value(ip_data->hpd_gpio);
@ -257,7 +254,7 @@ static int hdmi_check_hpd_state(struct hdmi_ip_data *ip_data)
}
err:
spin_unlock_irqrestore(&phy_tx_lock, flags);
mutex_unlock(&ip_data->lock);
return r;
}