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media: hantro: add PM runtime resume callback

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It seems that on i.MX8MQ the power domain controller does not propagate
resets to the VPU cores on resume. Add a callback to allow implementing
manual reset of the VPU cores after ungating the power domain.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Philipp Zabel 2019-06-12 05:39:08 -04:00 committed by Mauro Carvalho Chehab
parent 0b675962d9
commit 0fd7ada14e
2 changed files with 15 additions and 0 deletions
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2
drivers/staging/media/hantro/hantro.h
View File

@ -56,6 +56,7 @@ struct hantro_codec_ops;
* @codec: Supported codecs
* @codec_ops: Codec ops.
* @init: Initialize hardware.
* @runtime_resume: reenable hardware after power gating
* @vepu_irq: encoder interrupt handler
* @vdpu_irq: decoder interrupt handler
* @clk_names: array of clock names
@ -71,6 +72,7 @@ struct hantro_variant {
unsigned int codec;
const struct hantro_codec_ops *codec_ops;
int (*init)(struct hantro_dev *vpu);
int (*runtime_resume)(struct hantro_dev *vpu);
irqreturn_t (*vepu_irq)(int irq, void *priv);
irqreturn_t (*vdpu_irq)(int irq, void *priv);
const char *clk_names[HANTRO_MAX_CLOCKS];

13
drivers/staging/media/hantro/hantro_drv.c
View File

@ -832,9 +832,22 @@ static int hantro_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int hantro_runtime_resume(struct device *dev)
{
struct hantro_dev *vpu = dev_get_drvdata(dev);
if (vpu->variant->runtime_resume)
return vpu->variant->runtime_resume(vpu);
return 0;
}
#endif
static const struct dev_pm_ops hantro_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(NULL, hantro_runtime_resume, NULL)
};
static struct platform_driver hantro_driver = {