ASoC: Intel: Skylake: Add multichannel support for HDMI

Channel max is changed to 8 from stereo to support multichannel
capability for HDMI devices.
Signed-off-by: NSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-pcm.c

@@ -51,7 +51,7 @@ static struct snd_pcm_hardware azx_pcm_hw = {
 	.rate_min =		8000,
 	.rate_max =		48000,
 	.channels_min =		1,
-	.channels_max =		HDA_QUAD,
+	.channels_max =		8,
 	.buffer_bytes_max =	AZX_MAX_BUF_SIZE,
 	.period_bytes_min =	128,
 	.period_bytes_max =	AZX_MAX_BUF_SIZE / 2,
@@ -682,7 +682,7 @@ static struct snd_soc_dai_driver skl_platform_dai[] = {
 	.playback = {
 		.stream_name = "HDMI1 Playback",
 		.channels_min = HDA_STEREO,
-		.channels_max = HDA_STEREO,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_32000 |	SNDRV_PCM_RATE_44100 |
 			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
 			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
@@ -697,7 +697,7 @@ static struct snd_soc_dai_driver skl_platform_dai[] = {
 	.playback = {
 		.stream_name = "HDMI2 Playback",
 		.channels_min = HDA_STEREO,
-		.channels_max = HDA_STEREO,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_32000 |	SNDRV_PCM_RATE_44100 |
 			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
 			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
@@ -712,7 +712,7 @@ static struct snd_soc_dai_driver skl_platform_dai[] = {
 	.playback = {
 		.stream_name = "HDMI3 Playback",
 		.channels_min = HDA_STEREO,
-		.channels_max = HDA_STEREO,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_32000 |	SNDRV_PCM_RATE_44100 |
 			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
 			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
@@ -765,7 +765,7 @@ static struct snd_soc_dai_driver skl_platform_dai[] = {
 	.playback = {
 		.stream_name = "iDisp1 Tx",
 		.channels_min = HDA_STEREO,
-		.channels_max = HDA_STEREO,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE |
 			SNDRV_PCM_FMTBIT_S24_LE,
@@ -777,7 +777,7 @@ static struct snd_soc_dai_driver skl_platform_dai[] = {
 	.playback = {
 		.stream_name = "iDisp2 Tx",
 		.channels_min = HDA_STEREO,
-		.channels_max = HDA_STEREO,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|
 			SNDRV_PCM_RATE_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE |
@@ -790,7 +790,7 @@ static struct snd_soc_dai_driver skl_platform_dai[] = {
 	.playback = {
 		.stream_name = "iDisp3 Tx",
 		.channels_min = HDA_STEREO,
-		.channels_max = HDA_STEREO,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|
 			SNDRV_PCM_RATE_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE |