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ASoC: rockchip: dlp: Add support for pcm pattern playback

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CONFIG_SND_PCM_PATTERN_DEBUG

* MSB check
* channel id
* as much as more 0/1 stress

PATTERN8(x)     (0xa0 | (x))
PATTERN16(x)    (0xab00 | (x))
PATTERN32(x)    (0xabcabc00 | (x))

e.g. 16bit 4ch pattern:

0xab01 0xab02 0xab03 0xab04 0xab01 ...

This pattern is only used for IOCTL_READ/WRITE, not
suitable for MMAP.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: I96d9664460adeee13ac86558159b39c9ab0dabe8
This commit is contained in:
Sugar Zhang
2024-08-14 08:59:56 +08:00
parent 0083e5a0ce
commit 27f1ad5ccc
1 changed files with 61 additions and 2 deletions
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63
sound/soc/rockchip/rockchip_dlp.c
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@@ -857,6 +857,62 @@ static int dlp_process(struct snd_soc_component *component,
return ret;
}
/*
* MSB check
* channel id
* as much as more 0/1 stress
*/
#define PATTERN8(x) (0xa0 | (x))
#define PATTERN16(x) (0xab00 | (x))
#define PATTERN32(x) (0xabcabc00 | (x))
static void snd_fill_pattern_frame(char *buf, int bits, int ch)
{
unsigned char *ptr8 = (unsigned char *)buf;
unsigned short *ptr16 = (unsigned short *)buf;
unsigned int *ptr32 = (unsigned int *)buf;
int i = 0;
switch (bits) {
case 8:
for (i = 0; i < ch; i++)
ptr8[i] = PATTERN8(i + 1);
break;
case 16:
for (i = 0; i < ch; i++)
ptr16[i] = PATTERN16(i + 1);
break;
case 32:
for (i = 0; i < ch; i++)
ptr32[i] = PATTERN32(i + 1);
break;
default:
pr_err("invalid bits: %d\n", bits);
break;
}
}
static int snd_fill_pattern(struct snd_pcm_substream *substream,
int channels, unsigned long hwoff,
unsigned long bytes)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t frames;
void *buf;
int i = 0;
buf = runtime->dma_area + hwoff +
channels * (runtime->dma_bytes / runtime->channels);
frames = bytes_to_frames(runtime, bytes);
for (i = 0; i < frames; i++) {
snd_fill_pattern_frame(buf, runtime->sample_bits, runtime->channels);
buf += frames_to_bytes(runtime, 1);
}
return 0;
}
int dlp_copy_user(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
@@ -874,9 +930,12 @@ int dlp_copy_user(struct snd_soc_component *component,
dma_ptr = runtime->dma_area + hwoff +
channel * (runtime->dma_bytes / runtime->channels);
if (is_playback)
if (copy_from_user(dma_ptr, buf, bytes))
if (is_playback) {
if (IS_ENABLED(CONFIG_SND_PCM_PATTERN_DEBUG))
snd_fill_pattern(substream, channel, hwoff, bytes);
else if (copy_from_user(dma_ptr, buf, bytes))
return -EFAULT;
}
ret = dlp_process(component, substream, hwoff, buf, bytes);
if (!ret)