[alsa-devel] [PATCH v2 06/14] ASoC: hdac_hdmi: Apply constraints based on ELD

[Subhransu S. Prusty]

Uses the drm eld core framework to apply rate, channel and
format constraint.

Even though the channel constraint is based on ELD, infoframe
is set with stereo only. Multichannel support will be added
later.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
 sound/soc/codecs/Kconfig     | 1 +
 sound/soc/codecs/hdac_hdmi.c | 7 +++----
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index c0c5c8e..f805cb6 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -486,6 +486,7 @@ config SND_SOC_GTM601
 config SND_SOC_HDAC_HDMI
 	tristate
 	select SND_HDA_EXT_CORE
+	select SND_PCM_ELD
 	select HDMI
 
 config SND_SOC_ICS43432
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 65796ce..d891ad7 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -26,6 +26,7 @@
 #include <sound/soc.h>
 #include <sound/hdaudio_ext.h>
 #include <sound/hda_i915.h>
+#include <sound/pcm_drm_eld.h>
 #include "../../hda/local.h"
 
 #define AMP_OUT_MUTE		0xb080
@@ -356,10 +357,8 @@ static int hdac_hdmi_pcm_open(struct snd_pcm_substream *substream,
 	snd_hdac_codec_write(&hdac->hdac, dai_map->pin->nid, 0,
 			AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
 
-	snd_pcm_hw_constraint_step(substream->runtime, 0,
-				   SNDRV_PCM_HW_PARAM_CHANNELS, 2);
-
-	return 0;
+	return snd_pcm_hw_constraint_eld(substream->runtime,
+			dai_map->pin->eld.eld_buffer);
 }
 
 static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
-- 
1.9.1