提交 393004b2 编写于 作者: N Nitin Daga 提交者: Takashi Iwai

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: NNitin Daga <ndaga@nvidia.com>
Acked-By: NStephen Warren <swarren@nvidia.com>
Cc: <stable@kernel.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
上级 0ebaa24c
......@@ -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);
}
......
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