hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ASoC: nuc900: No need to track the dma buffer in the driver state struct 

The DMA buffer and address can be accessed through the snd_pcm_runtime.
There is no need to manually track them in the driver's state struct.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2015-03-15 12:15:24 +01:00 committed by Mark Brown
parent c517d838eb
commit fa41181fe3
2 changed files with 5 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sound/soc/nuc900/nuc900-audio.h
View File

@ -100,10 +100,7 @@
struct nuc900_audio {
void __iomem *mmio;
spinlock_t lock;
dma_addr_t dma_addr[2];
unsigned long buffersize[2];
unsigned long irq_num;
struct snd_pcm_substream *substream;
struct resource *res;
struct clk *clk;
struct device *dev;

31
sound/soc/nuc900/nuc900-pcm.c
View File

@ -42,29 +42,10 @@ static const struct snd_pcm_hardware nuc900_pcm_hardware = {
static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
unsigned long flags;
int ret = 0;
ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
if (ret < 0)
return ret;
spin_lock_irqsave(&nuc900_audio->lock, flags);
nuc900_audio->substream = substream;
nuc900_audio->dma_addr[substream->stream] = runtime->dma_addr;
nuc900_audio->buffersize[substream->stream] =
params_buffer_bytes(params);
spin_unlock_irqrestore(&nuc900_audio->lock, flags);
return ret;
return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
}
static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
dma_addr_t dma_addr, size_t count)
static void nuc900_update_dma_register(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
@ -78,8 +59,8 @@ static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
}
AUDIO_WRITE(mmio_addr, dma_addr);
AUDIO_WRITE(mmio_len, count);
AUDIO_WRITE(mmio_addr, runtime->dma_addr);
AUDIO_WRITE(mmio_len, runtime->dma_bytes);
}
static void nuc900_dma_start(struct snd_pcm_substream *substream)
@ -170,9 +151,7 @@ static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
spin_lock_irqsave(&nuc900_audio->lock, flags);
nuc900_update_dma_register(substream,
nuc900_audio->dma_addr[substream->stream],
nuc900_audio->buffersize[substream->stream]);
nuc900_update_dma_register(substream);
val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);