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[media] s5p-csis: Rework the system suspend/resume helpers

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Do not resume the device during system resume if it was idle
before system suspend, as this causes resume from suspend
to RAM failures on Exynos4. For this purpose runtime PM and
system sleep helpers are separated.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2011-07-07 12:13:25 -03:00 committed by Mauro Carvalho Chehab
parent 438df3ebe5
commit d4d4e3c972
1 changed files with 22 additions and 19 deletions
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41
drivers/media/video/s5p-fimc/mipi-csis.c
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@ -559,7 +559,6 @@ static int __devinit s5pcsis_probe(struct platform_device *pdev)
/* .. and a pointer to the subdev. */
platform_set_drvdata(pdev, &state->sd);
state->flags = ST_SUSPENDED;
pm_runtime_enable(&pdev->dev);
return 0;
@ -580,7 +579,7 @@ e_free:
return ret;
}
static int s5pcsis_suspend(struct device *dev)
static int s5pcsis_pm_suspend(struct device *dev, bool runtime)
{
struct s5p_platform_mipi_csis *pdata = dev->platform_data;
struct platform_device *pdev = to_platform_device(dev);
@ -603,14 +602,15 @@ static int s5pcsis_suspend(struct device *dev)
goto unlock;
clk_disable(state->clock[CSIS_CLK_GATE]);
state->flags &= ~ST_POWERED;
if (!runtime)
state->flags |= ST_SUSPENDED;
}
state->flags |= ST_SUSPENDED;
unlock:
mutex_unlock(&state->lock);
return ret ? -EAGAIN : 0;
}
static int s5pcsis_resume(struct device *dev)
static int s5pcsis_pm_resume(struct device *dev, bool runtime)
{
struct s5p_platform_mipi_csis *pdata = dev->platform_data;
struct platform_device *pdev = to_platform_device(dev);
@ -622,7 +622,7 @@ static int s5pcsis_resume(struct device *dev)
__func__, state->flags);
mutex_lock(&state->lock);
if (!(state->flags & ST_SUSPENDED))
if (!runtime && !(state->flags & ST_SUSPENDED))
goto unlock;
if (!(state->flags & ST_POWERED)) {
@ -650,24 +650,26 @@ static int s5pcsis_resume(struct device *dev)
}
#ifdef CONFIG_PM_SLEEP
static int s5pcsis_pm_suspend(struct device *dev)
static int s5pcsis_suspend(struct device *dev)
{
return s5pcsis_suspend(dev);
return s5pcsis_pm_suspend(dev, false);
}
static int s5pcsis_pm_resume(struct device *dev)
static int s5pcsis_resume(struct device *dev)
{
int ret;
return s5pcsis_pm_resume(dev, false);
}
#endif
ret = s5pcsis_resume(dev);
#ifdef CONFIG_PM_RUNTIME
static int s5pcsis_runtime_suspend(struct device *dev)
{
return s5pcsis_pm_suspend(dev, true);
}
if (!ret) {
pm_runtime_disable(dev);
ret = pm_runtime_set_active(dev);
pm_runtime_enable(dev);
}
return ret;
static int s5pcsis_runtime_resume(struct device *dev)
{
return s5pcsis_pm_resume(dev, true);
}
#endif
@ -695,8 +697,9 @@ static int __devexit s5pcsis_remove(struct platform_device *pdev)
}
static const struct dev_pm_ops s5pcsis_pm_ops = {
SET_RUNTIME_PM_OPS(s5pcsis_suspend, s5pcsis_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(s5pcsis_pm_suspend, s5pcsis_pm_resume)
SET_RUNTIME_PM_OPS(s5pcsis_runtime_suspend, s5pcsis_runtime_resume,
NULL)
SET_SYSTEM_SLEEP_PM_OPS(s5pcsis_suspend, s5pcsis_resume)
};
static struct platform_driver s5pcsis_driver = {