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| author | Nitin Daga <ndaga@nvidia.com> | 2011-01-10 21:49:31 +0530 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-01-12 07:46:23 +0100 |
| commit | 393004b2ea49524ee41a562cae8db67f50f372a5 (patch) | |
| tree | 778c47155ad07ef37315a89ccbba74e469003e83 /sound | |
| parent | 0ebaa24c6b1f62839bcd12d63fa76e3cf23b9bd0 (diff) | |
| download | linux-393004b2ea49524ee41a562cae8db67f50f372a5.tar.gz | |
ALSA: hda: Disable 4/6 channels on some NVIDIA GPUs.
Added hardware constraint in patch_hdmi.c to disable channels 4/6 which are not supported by some older NVIDIA GPUs. Signed-off-by: Nitin Daga <ndaga@nvidia.com> Acked-By: Stephen Warren <swarren@nvidia.com> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_hdmi.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 8804c05b5fc7..f29b97b5de8f 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1193,11 +1193,53 @@ static int nvhdmi_7x_init(struct hda_codec *codec) return 0; } +static unsigned int channels_2_6_8[] = { + 2, 6, 8 +}; + +static unsigned int channels_2_8[] = { + 2, 8 +}; + +static struct snd_pcm_hw_constraint_list hw_constraints_2_6_8_channels = { + .count = ARRAY_SIZE(channels_2_6_8), + .list = channels_2_6_8, + .mask = 0, +}; + +static struct snd_pcm_hw_constraint_list hw_constraints_2_8_channels = { + .count = ARRAY_SIZE(channels_2_8), + .list = channels_2_8, + .mask = 0, +}; + static int simple_playback_pcm_open(struct hda_pcm_stream *hinfo, struct hda_codec *codec, struct snd_pcm_substream *substream) { struct hdmi_spec *spec = codec->spec; + struct snd_pcm_hw_constraint_list *hw_constraints_channels = NULL; + + switch (codec->preset->id) { + case 0x10de0002: + case 0x10de0003: + case 0x10de0005: + case 0x10de0006: + hw_constraints_channels = &hw_constraints_2_8_channels; + break; + case 0x10de0007: + hw_constraints_channels = &hw_constraints_2_6_8_channels; + break; + default: + break; + } + + if (hw_constraints_channels != NULL) { + snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, + hw_constraints_channels); + } + return snd_hda_multi_out_dig_open(codec, &spec->multiout); } |