[alsa-devel] Applied "ASoC: Intel: Skylake: Constrain the audio devices" to the asoc tree

[Mark Brown]

The patch

   ASoC: Intel: Skylake: Constrain the audio devices

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 5eab6ab9c7882f63d7dd544b736293a9d2b8106c Mon Sep 17 00:00:00 2001
From: Vinod Koul <vinod.koul at intel.com>
Date: Fri, 13 Nov 2015 19:22:12 +0530
Subject: [PATCH] ASoC: Intel: Skylake: Constrain the audio devices

In ref configuration for Skylake, we support only 16bit, 48KHz,
stereo audio, so specify these as constrains for the devices

Signed-off-by: Jeeja KP <jeeja.kp at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/intel/boards/skl_rt286.c | 49 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/sound/soc/intel/boards/skl_rt286.c b/sound/soc/intel/boards/skl_rt286.c
index e6af48491229..9c67e05a24b3 100644
--- a/sound/soc/intel/boards/skl_rt286.c
+++ b/sound/soc/intel/boards/skl_rt286.c
@@ -104,6 +104,53 @@ static int skylake_rt286_codec_init(struct snd_soc_pcm_runtime *rtd)
 	return 0;
 }
 
+static unsigned int rates[] = {
+	48000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_rates = {
+	.count = ARRAY_SIZE(rates),
+	.list  = rates,
+	.mask = 0,
+};
+
+static unsigned int channels[] = {
+	2,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_channels = {
+	.count = ARRAY_SIZE(channels),
+	.list = channels,
+	.mask = 0,
+};
+
+static int skl_fe_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	/*
+	 * on this platform for PCM device we support,
+	 *	48Khz
+	 *	stereo
+	 *	16 bit audio
+	 */
+
+	runtime->hw.channels_max = 2;
+	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+					   &constraints_channels);
+
+	runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
+	snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
+
+	snd_pcm_hw_constraint_list(runtime, 0,
+				SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
+
+	return 0;
+}
+
+static const struct snd_soc_ops skylake_rt286_fe_ops = {
+	.startup = skl_fe_startup,
+};
 
 static int skylake_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
 			struct snd_pcm_hw_params *params)
@@ -160,6 +207,7 @@ static struct snd_soc_dai_link skylake_rt286_dais[] = {
 			SND_SOC_DPCM_TRIGGER_POST
 		},
 		.dpcm_playback = 1,
+		.ops = &skylake_rt286_fe_ops,
 	},
 	{
 		.name = "Skl Audio Capture Port",
@@ -175,6 +223,7 @@ static struct snd_soc_dai_link skylake_rt286_dais[] = {
 			SND_SOC_DPCM_TRIGGER_POST
 		},
 		.dpcm_capture = 1,
+		.ops = &skylake_rt286_fe_ops,
 	},
 	{
 		.name = "Skl Audio Reference cap",
-- 
2.6.2