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ASoC: dmaengine: Use iov_iter for process callback, too

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Along with the conversion to PCM copy ops, use the iov_iter for the
pointer to be passed to the dmaengine process callback, too.  It
avoids the direct reference of iter_iov_addr(), and it can potentially
help for the drivers to access memory properly (although both atmel
and stm drivers don't use the given buffer address at all for now).

Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Olivier Moysan <olivier.moysan@foss.st.com>
Cc: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20230815190136.8987-23-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2023-08-15 21:01:33 +02:00
parent 56b00d10ff
commit 9bebd65443
4 changed files with 5 additions and 6 deletions
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2
include/sound/dmaengine_pcm.h
View File

@ -142,7 +142,7 @@ struct snd_dmaengine_pcm_config {
struct snd_pcm_substream *substream);
int (*process)(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes);
struct iov_iter *buf, unsigned long bytes);
dma_filter_fn compat_filter_fn;
struct device *dma_dev;
const char *chan_names[SNDRV_PCM_STREAM_LAST + 1];

2
sound/soc/atmel/mchp-pdmc.c
View File

@ -954,7 +954,7 @@ static int mchp_pdmc_dt_init(struct mchp_pdmc *dd)
/* used to clean the channel index found on RHR's MSB */
static int mchp_pdmc_process(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes)
struct iov_iter *buf, unsigned long bytes)
{
struct snd_pcm_runtime *runtime = substream->runtime;
u8 *dma_ptr = runtime->dma_area + hwoff +

5
sound/soc/soc-generic-dmaengine-pcm.c
View File

@ -296,18 +296,17 @@ static int dmaengine_copy(struct snd_soc_component *component,
struct dmaengine_pcm *pcm = soc_component_to_pcm(component);
int (*process)(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes) = pcm->config->process;
struct iov_iter *buf, unsigned long bytes) = pcm->config->process;
bool is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
void *dma_ptr = runtime->dma_area + hwoff +
channel * (runtime->dma_bytes / runtime->channels);
void *ptr = (void __force *)iter_iov_addr(buf);
if (is_playback)
if (copy_from_iter(dma_ptr, bytes, buf) != bytes)
return -EFAULT;
if (process) {
int ret = process(substream, channel, hwoff, ptr, bytes);
int ret = process(substream, channel, hwoff, buf, bytes);
if (ret < 0)
return ret;
}

2
sound/soc/stm/stm32_sai_sub.c
View File

@ -1233,7 +1233,7 @@ static const struct snd_soc_dai_ops stm32_sai_pcm_dai_ops = {
static int stm32_sai_pcm_process_spdif(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes)
struct iov_iter *buf, unsigned long bytes)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);