xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ALSA: firewire: arrange common PCM info/constraints for AMDTP engine applications

Browse Source 
In ALSA firewire stack, 8 drivers uses IEC 61883-1/6 engine for data
transmission. They have common PCM info/constraints and duplicated codes.

This commit unifies the codes into fireiwre-lib.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto
2017-06-08 09:11:03 +09:00
committed by Takashi Iwai
parent c6706de0ce
commit 55799c5ab9
9 changed files with 36 additions and 174 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
sound/firewire/bebob/bebob_pcm.c
View File

@@ -92,19 +92,6 @@ limit_channels_and_rates(struct snd_pcm_hardware *hw,
}
}
static void
limit_period_and_buffer(struct snd_pcm_hardware *hw)
{
hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
hw->periods_max = UINT_MAX;
hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */
/* Just to prevent from allocating much pages. */
hw->period_bytes_max = hw->period_bytes_min * 2048;
hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
}
static int
pcm_init_hw_params(struct snd_bebob *bebob,
struct snd_pcm_substream *substream)
@@ -114,13 +101,6 @@ pcm_init_hw_params(struct snd_bebob *bebob,
struct snd_bebob_stream_formation *formations;
int err;
runtime->hw.info = SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_JOINT_DUPLEX |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
s = &bebob->tx_stream;
@@ -132,7 +112,6 @@ pcm_init_hw_params(struct snd_bebob *bebob,
}
limit_channels_and_rates(&runtime->hw, formations);
limit_period_and_buffer(&runtime->hw);
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
hw_rule_channels, formations,