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

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>

1 files changed, 0 insertions, 21 deletions

diff --git a/sound/firewire/fireface/ff-pcm.c b/sound/firewire/fireface/ff-pcm.c
index ad974b5a2561..d12a0e3a4219 100644
--- a/sound/firewire/fireface/ff-pcm.c
+++ b/sound/firewire/fireface/ff-pcm.c
@@ -91,18 +91,6 @@ static void 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_ff *ff,
                               struct snd_pcm_substream *substream)
 {
@@ -111,13 +99,6 @@ static int pcm_init_hw_params(struct snd_ff *ff,
         const unsigned int *pcm_channels;
         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 = SNDRV_PCM_FMTBIT_S32;
                 s = &ff->tx_stream;
@@ -128,9 +109,7 @@ static int pcm_init_hw_params(struct snd_ff *ff,
                 pcm_channels = ff->spec->pcm_playback_channels;
         }
 
-        /* limit rates */
         limit_channels_and_rates(&runtime->hw, pcm_channels);
-        limit_period_and_buffer(&runtime->hw);
 
         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
                                   hw_rule_channels, (void *)pcm_channels,