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Commit 54a96dadaa2bbe81006c66447517b57534d80e7f

Authored by Raymond Yau
Committed by Takashi Iwai
1 parent 6a9a6f233b
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

ALSA - au88x0 - Add buffer bytes constraints 

This allow application such as gstreamer and wine which use
snd_pcm_hw_params_set_buffer_time_near() won't fail any more
since sound chips require special containt power 2 period bytes

Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Showing 1 changed file with 5 additions and 2 deletions Side-by-side Diff

sound/pci/au88x0/au88x0_pcm.c
Diff comments   View file @ 54a96da
... ... @@ -44,10 +44,10 @@
44 44 .channels_min = 1,
45 45 .channels_max = 2,
46 46 .buffer_bytes_max = 0x10000,
47   - .period_bytes_min = 0x1,
  47 + .period_bytes_min = 0x20,
48 48 .period_bytes_max = 0x1000,
49 49 .periods_min = 2,
50   - .periods_max = 32,
  50 + .periods_max = 1024,
51 51 };
52 52  
53 53 #ifndef CHIP_AU8820
... ... @@ -139,6 +139,9 @@
139 139 snd_pcm_hw_constraint_pow2(runtime, 0,
140 140 SNDRV_PCM_HW_PARAM_PERIOD_BYTES)) < 0)
141 141 return err;
  142 +
  143 + snd_pcm_hw_constraint_step(runtime, 0,
  144 + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 64);
142 145  
143 146 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
144 147 #ifndef CHIP_AU8820