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ALSA: hda: program stripe control for codec 

Program codec stripe through AC_VERB_SET_STRIPE_CONTROL to use multiple
sdo lines if supported. Audio needs to be striped across number of sdo
lines for simultaneous playbacks of higher resolutions to work.
This needs to be implemented only for an Audio Output Converter and only
if the stripe bit(AC_WCAP_STRIPE) of Audio Widget Capabilities parameter
is 1.

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-by: Mohan Kumar D <mkumard@nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Sameer Pujar 2019-01-14 23:51:12 +05:30 committed by Takashi Iwai
parent 9b6f7e7a29
commit 053b055948
1 changed files with 9 additions and 1 deletions
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10
sound/pci/hda/patch_hdmi.c
View File

@ -1865,7 +1865,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
hda_nid_t pin_nid;
struct snd_pcm_runtime *runtime = substream->runtime;
bool non_pcm;
int pinctl;
int pinctl, stripe;
int err = 0;
mutex_lock(&spec->pcm_lock);
@ -1909,6 +1909,14 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
per_pin->channels = substream->runtime->channels;
per_pin->setup = true;
if (get_wcaps(codec, cvt_nid) & AC_WCAP_STRIPE) {
stripe = snd_hdac_get_stream_stripe_ctl(&codec->bus->core,
substream);
snd_hda_codec_write(codec, cvt_nid, 0,
AC_VERB_SET_STRIPE_CONTROL,
stripe);
}
hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
mutex_unlock(&per_pin->lock);
if (spec->dyn_pin_out) {