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asoc: msm: Add flexible period count to pcm record driver

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In pcm recording, if buffers are not requested from dsp at real
 time then dsp drops the buffers and sends partial buffers. This
 is causing record failures. Pcm record platform driver has two
 periods. If system is loaded, read request will not be at real
 time. Add flexible period count to pcm record platform driver
 so client can configure the period count.

CRs-Fixed: 467746
Change-Id: Iadd47979f7b29a01fb8e6479383094a2ed1d93c5
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>
This commit is contained in:
Krishnankutty Kolathappilly 2013-03-28 19:20:47 -07:00 committed by Artem Borisov
parent 796ae158b5
commit 799b9c14c2
1 changed files with 13 additions and 7 deletions
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20
sound/soc/msm/msm-pcm-q6.c
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@ -41,7 +41,8 @@ struct snd_msm {
#define PLAYBACK_NUM_PERIODS 8
#define PLAYBACK_PERIOD_SIZE 2048
#define CAPTURE_NUM_PERIODS 2
#define CAPTURE_MIN_NUM_PERIODS 2
#define CAPTURE_MAX_NUM_PERIODS 16
#define CAPTURE_MAX_PERIOD_SIZE 4096
#define CAPTURE_MIN_PERIOD_SIZE 320
@ -57,11 +58,12 @@ static struct snd_pcm_hardware msm_pcm_hardware_capture = {
.rate_max = 48000,
.channels_min = 1,
.channels_max = 4,
.buffer_bytes_max = CAPTURE_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS *
CAPTURE_MAX_PERIOD_SIZE,
.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
.periods_min = CAPTURE_NUM_PERIODS,
.periods_max = CAPTURE_NUM_PERIODS,
.periods_min = CAPTURE_MIN_NUM_PERIODS,
.periods_max = CAPTURE_MAX_NUM_PERIODS,
.fifo_size = 0,
};
@ -90,7 +92,7 @@ static unsigned int supported_sample_rates[] = {
8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000
};
static uint32_t in_frame_info[CAPTURE_NUM_PERIODS][2];
static uint32_t in_frame_info[CAPTURE_MAX_NUM_PERIODS][2];
static struct snd_pcm_hw_constraint_list constraints_sample_rates = {
.count = ARRAY_SIZE(supported_sample_rates),
@ -365,8 +367,8 @@ static int msm_pcm_open(struct snd_pcm_substream *substream)
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
ret = snd_pcm_hw_constraint_minmax(runtime,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
CAPTURE_NUM_PERIODS * CAPTURE_MIN_PERIOD_SIZE,
CAPTURE_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE);
CAPTURE_MIN_NUM_PERIODS * CAPTURE_MIN_PERIOD_SIZE,
CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE);
if (ret < 0) {
pr_err("constraint for buffer bytes min max ret = %d\n",
ret);
@ -673,6 +675,10 @@ static int msm_pcm_hw_params(struct snd_pcm_substream *substream,
prtd->audio_client,
(params_buffer_bytes(params) / params_periods(params)),
params_periods(params));
pr_debug("buff bytes = %d, period size = %d,\
period count = %d\n", params_buffer_bytes(params),
params_periods(params),
params_buffer_bytes(params) / params_periods(params));
} else {
ret = q6asm_audio_client_buf_alloc_contiguous(dir,
prtd->audio_client,