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[media] s5p-jpeg: Fix clock resource management 

Standard suspend/resume path is called after runtime resume
of the given device, so suspend/resume callbacks must do all
clock management done also by runtime pm to allow for proper
power domain shutdown. Moreover, JPEG clock is enabled from
probe function but is is not necessary. This patch also moves
control of jpeg clock to runtime_pm callbacks.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Jacek Anaszewski 2013-11-25 06:58:13 -03:00 committed by Mauro Carvalho Chehab
parent 31dc0ac0d0
commit f1347132a6
1 changed files with 30 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/media/platform/s5p-jpeg/jpeg-core.c
View File

@ -1272,7 +1272,6 @@ static int s5p_jpeg_probe(struct platform_device *pdev)
return ret;
}
dev_dbg(&pdev->dev, "clock source %p\n", jpeg->clk);
clk_prepare_enable(jpeg->clk);
/* v4l2 device */
ret = v4l2_device_register(&pdev->dev, &jpeg->v4l2_dev);
@ -1380,7 +1379,6 @@ device_register_rollback:
v4l2_device_unregister(&jpeg->v4l2_dev);
clk_get_rollback:
clk_disable_unprepare(jpeg->clk);
clk_put(jpeg->clk);
return ret;
@ -1400,7 +1398,9 @@ static int s5p_jpeg_remove(struct platform_device *pdev)
v4l2_m2m_release(jpeg->m2m_dev);
v4l2_device_unregister(&jpeg->v4l2_dev);
clk_disable_unprepare(jpeg->clk);
if (!pm_runtime_status_suspended(&pdev->dev))
clk_disable_unprepare(jpeg->clk);
clk_put(jpeg->clk);
return 0;
@ -1408,12 +1408,21 @@ static int s5p_jpeg_remove(struct platform_device *pdev)
static int s5p_jpeg_runtime_suspend(struct device *dev)
{
struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
clk_disable_unprepare(jpeg->clk);
return 0;
}
static int s5p_jpeg_runtime_resume(struct device *dev)
{
struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(jpeg->clk);
if (ret < 0)
return ret;
/*
* JPEG IP allows storing two Huffman tables for each component
@ -1427,9 +1436,25 @@ static int s5p_jpeg_runtime_resume(struct device *dev)
return 0;
}
static int s5p_jpeg_suspend(struct device *dev)
{
if (pm_runtime_suspended(dev))
return 0;
return s5p_jpeg_runtime_suspend(dev);
}
static int s5p_jpeg_resume(struct device *dev)
{
if (pm_runtime_suspended(dev))
return 0;
return s5p_jpeg_runtime_resume(dev);
}
static const struct dev_pm_ops s5p_jpeg_pm_ops = {
.runtime_suspend = s5p_jpeg_runtime_suspend,
.runtime_resume = s5p_jpeg_runtime_resume,
SET_SYSTEM_SLEEP_PM_OPS(s5p_jpeg_suspend, s5p_jpeg_resume)
SET_RUNTIME_PM_OPS(s5p_jpeg_runtime_suspend, s5p_jpeg_runtime_resume, NULL)
};
#ifdef CONFIG_OF