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| author | Raymond Yau <superquad.vortex2@gmail.com> | 2011-01-16 10:55:54 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-01-17 11:04:01 +0100 |
| commit | d9ab344336f74c012f6643ed3d1ad8ca0136de3b (patch) | |
| tree | 5a858bfefef38b288af7f9e94f1bb3a5714eedef /sound/pci/au88x0/au88x0_pcm.c | |
| parent | 3e8b3b90fecedcf20d895c4e6ad01a379fe252bf (diff) | |
| download | blackbird-op-linux-d9ab344336f74c012f6643ed3d1ad8ca0136de3b.tar.gz blackbird-op-linux-d9ab344336f74c012f6643ed3d1ad8ca0136de3b.zip | |
ALSA : au88x0 - Limit number of channels to fix Oops via OSS emu
Fix playback/capture channels patch to change supported playback
channels of au8830 to 1,2,4 and capture channels to 1,2.
This prevent oops when oss emulation use SNDCTL_DSP_CHANNELS to
set 3 Channels
Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/au88x0/au88x0_pcm.c')
| -rw-r--r-- | sound/pci/au88x0/au88x0_pcm.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/sound/pci/au88x0/au88x0_pcm.c b/sound/pci/au88x0/au88x0_pcm.c index b9d2f202cf9b..5439d662d104 100644 --- a/sound/pci/au88x0/au88x0_pcm.c +++ b/sound/pci/au88x0/au88x0_pcm.c @@ -42,11 +42,7 @@ static struct snd_pcm_hardware snd_vortex_playback_hw_adb = { .rate_min = 5000, .rate_max = 48000, .channels_min = 1, -#ifdef CHIP_AU8830 - .channels_max = 4, -#else .channels_max = 2, -#endif .buffer_bytes_max = 0x10000, .period_bytes_min = 0x1, .period_bytes_max = 0x1000, @@ -115,6 +111,17 @@ static struct snd_pcm_hardware snd_vortex_playback_hw_wt = { .periods_max = 64, }; #endif +#ifdef CHIP_AU8830 +static unsigned int au8830_channels[3] = { + 1, 2, 4, +}; + +static struct snd_pcm_hw_constraint_list hw_constraints_au8830_channels = { + .count = ARRAY_SIZE(au8830_channels), + .list = au8830_channels, + .mask = 0, +}; +#endif /* open callback */ static int snd_vortex_pcm_open(struct snd_pcm_substream *substream) { @@ -156,6 +163,15 @@ static int snd_vortex_pcm_open(struct snd_pcm_substream *substream) if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB || VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_I2S) runtime->hw = snd_vortex_playback_hw_adb; +#ifdef CHIP_AU8830 + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && + VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB) { + runtime->hw.channels_max = 4; + snd_pcm_hw_constraint_list(runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, + &hw_constraints_au8830_channels); + } +#endif substream->runtime->private_data = NULL; } #ifndef CHIP_AU8810 |
