[alsa-devel] [PATCH v2 5/5] ALSA: hda: program stripe control for codec

[Sameer Pujar]

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 at nvidia.com>
Reviewed-by: Mohan Kumar D <mkumard at nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande at nvidia.com>
---
 sound/pci/hda/patch_hdmi.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 46f88dc..73d7042f 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -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) {
-- 
2.7.4


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