diff options
| author | Yu Zhao <yuzhao@google.com> | 2018-12-04 15:42:53 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-12-06 12:55:28 +0000 |
| commit | 23aa128bb28d9da69bb1bdb2b70e50128857884a (patch) | |
| tree | c1d003495b880eae0a0e6cbf2f89d84d7658cdf8 /sound/soc | |
| parent | d6d08273996b3363178b920ccfa74acabaf67963 (diff) | |
| download | linux-23aa128bb28d9da69bb1bdb2b70e50128857884a.tar.bz2 | |
ASoC: use dma_ops of parent device for acp_audio_dma
AMD platform device acp_audio_dma can only be created by parent PCI
device driver (drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c). Pass struct
device of the parent to snd_pcm_lib_preallocate_pages() so
dma_alloc_coherent() can use correct dma_ops. Otherwise, it will
use default dma_ops which is nommu_dma_ops on x86_64 even when
IOMMU is enabled and set to non passthrough mode.
Though platform device inherits some dma related fields during its
creation in mfd_add_device(), we can't simply pass its struct device
to snd_pcm_lib_preallocate_pages() because dma_ops is not among the
inherited fields. Even it were, drivers/iommu/amd_iommu.c would
ignore it because get_device_id() doesn't handle platform device.
This change shouldn't give us any trouble even struct device of the
parent becomes null or represents some non PCI device in the future,
because get_dma_ops() correctly handles null struct device or uses
the default dma_ops if struct device doesn't have it set.
Signed-off-by: Yu Zhao <yuzhao@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/amd/acp-pcm-dma.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c index fd3db4c37882..f4011bebc7ec 100644 --- a/sound/soc/amd/acp-pcm-dma.c +++ b/sound/soc/amd/acp-pcm-dma.c @@ -1146,18 +1146,21 @@ static int acp_dma_new(struct snd_soc_pcm_runtime *rtd) struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); struct audio_drv_data *adata = dev_get_drvdata(component->dev); + struct device *parent = component->dev->parent; switch (adata->asic_type) { case CHIP_STONEY: ret = snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, - NULL, ST_MIN_BUFFER, + parent, + ST_MIN_BUFFER, ST_MAX_BUFFER); break; default: ret = snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, - NULL, MIN_BUFFER, + parent, + MIN_BUFFER, MAX_BUFFER); break; } |