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ASoC: AMD: add pm ops 

genpd will power off/on ACP to manage runtime ACP PM. ACP runtime PM
hooks are added to get it deinitialized and initialized respectively,
after it is powered off/on.

When system goes to suspend when audio usecase is active, ACP will
be powered off through genpd. When it resumes, ACP needs to be
initialized and reconfigured.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maruthi Srinivas Bayyavarapu 2016-01-08 18:22:10 -05:00 committed by Mark Brown
parent 7c31335a03
commit 1927da9355
1 changed files with 48 additions and 0 deletions
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48
sound/soc/amd/acp-pcm-dma.c
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@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/sizes.h>
#include <linux/pm_runtime.h>
#include <sound/soc.h>
@ -885,6 +886,10 @@ static int acp_audio_probe(struct platform_device *pdev)
return status;
}
pm_runtime_set_autosuspend_delay(&pdev->dev, 10000);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_enable(&pdev->dev);
return status;
}
@ -894,15 +899,58 @@ static int acp_audio_remove(struct platform_device *pdev)
acp_deinit(adata->acp_mmio);
snd_soc_unregister_platform(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
static int acp_pcm_resume(struct device *dev)
{
struct audio_drv_data *adata = dev_get_drvdata(dev);
acp_init(adata->acp_mmio);
if (adata->play_stream && adata->play_stream->runtime)
config_acp_dma(adata->acp_mmio,
adata->play_stream->runtime->private_data);
if (adata->capture_stream && adata->capture_stream->runtime)
config_acp_dma(adata->acp_mmio,
adata->capture_stream->runtime->private_data);
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}
static int acp_pcm_runtime_suspend(struct device *dev)
{
struct audio_drv_data *adata = dev_get_drvdata(dev);
acp_deinit(adata->acp_mmio);
acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}
static int acp_pcm_runtime_resume(struct device *dev)
{
struct audio_drv_data *adata = dev_get_drvdata(dev);
acp_init(adata->acp_mmio);
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}
static const struct dev_pm_ops acp_pm_ops = {
.resume = acp_pcm_resume,
.runtime_suspend = acp_pcm_runtime_suspend,
.runtime_resume = acp_pcm_runtime_resume,
};
static struct platform_driver acp_dma_driver = {
.probe = acp_audio_probe,
.remove = acp_audio_remove,
.driver = {
.name = "acp_audio_dma",
.pm = &acp_pm_ops,
},
};