[PATCH v2 0/3] add channel constraint for BDW machine drivers

[PATCH v2 0/3] add channel constraint for BDW machine drivers

[Brent Lu]

The machine driver bdw-rt5650 (for Google buddy) supports 2 or 4-channel
recording while other two drivers support only 2-channel recording. HW
constraints are implemented to reflect the hardware limitation on BDW
platform.

Changes since v1:
- Change the patch title.
- Remove the DUAL_CHANNEL and QUAD_CHANNEL macros which are too obvious.
- Follow the naming convertion, using 'bdw_rt5650_' and 'bdw_rt5677_' to
  name startup functions.
- Refine the comments in startup functions.
- Redesign the bdw_rt5650_fe_startup() function for readability.
- Add an assignment to initialize runtime->hw.channels_max variable.

Brent Lu (3):
  ASoC: bdw-rt5677: add channel constraint
  ASoC: bdw-rt5650: add channel constraint
  ASoC: broadwell: add channel constraint

 sound/soc/intel/boards/bdw-rt5650.c | 29 +++++++++++++++++++++++++++++
 sound/soc/intel/boards/bdw-rt5677.c | 26 ++++++++++++++++++++++++++
 sound/soc/intel/boards/broadwell.c  | 26 ++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)

-- 
2.7.4

[PATCH v2 1/3] ASoC: bdw-rt5677: add channel constraint

[Brent Lu]

BDW boards using this machine driver supports only stereo capture and
playback. Implement a constraint to enforce it.

Signed-off-by: Brent Lu <brent.lu@intel.com>
---
 sound/soc/intel/boards/bdw-rt5677.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/sound/soc/intel/boards/bdw-rt5677.c b/sound/soc/intel/boards/bdw-rt5677.c
index cc41a34..5f96d7a 100644
--- a/sound/soc/intel/boards/bdw-rt5677.c
+++ b/sound/soc/intel/boards/bdw-rt5677.c
@@ -222,6 +222,31 @@ static int bdw_rt5677_rtd_init(struct snd_soc_pcm_runtime *rtd)
 }
 #endif
 
+static const unsigned int channels[] = {
+	2,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_channels = {
+	.count = ARRAY_SIZE(channels),
+	.list = channels,
+	.mask = 0,
+};
+
+static int bdw_rt5677_fe_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	/* Board supports stereo configuration only */
+	runtime->hw.channels_max = 2;
+	return snd_pcm_hw_constraint_list(runtime, 0,
+					  SNDRV_PCM_HW_PARAM_CHANNELS,
+					  &constraints_channels);
+}
+
+static const struct snd_soc_ops bdw_rt5677_fe_ops = {
+	.startup = bdw_rt5677_fe_startup,
+};
+
 static int bdw_rt5677_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct bdw_rt5677_priv *bdw_rt5677 =
@@ -321,6 +346,7 @@ static struct snd_soc_dai_link bdw_rt5677_dais[] = {
 		},
 		.dpcm_capture = 1,
 		.dpcm_playback = 1,
+		.ops = &bdw_rt5677_fe_ops,
 		SND_SOC_DAILINK_REG(fe, dummy, platform),
 	},
 
-- 
2.7.4

[PATCH v2 2/3] ASoC: bdw-rt5650: add channel constraint

[Brent Lu]

BDW boards using this machine driver supports only 2 or 4-channel capture.
Implement a constraint to enforce it.

Signed-off-by: Brent Lu <brent.lu@intel.com>
---
 sound/soc/intel/boards/bdw-rt5650.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/sound/soc/intel/boards/bdw-rt5650.c b/sound/soc/intel/boards/bdw-rt5650.c
index af2f502..a97e912 100644
--- a/sound/soc/intel/boards/bdw-rt5650.c
+++ b/sound/soc/intel/boards/bdw-rt5650.c
@@ -162,6 +162,34 @@ static int bdw_rt5650_rtd_init(struct snd_soc_pcm_runtime *rtd)
 }
 #endif
 
+static const unsigned int channels[] = {
+	2, 4,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_channels = {
+	.count = ARRAY_SIZE(channels),
+	.list = channels,
+	.mask = 0,
+};
+
+static int bdw_rt5650_fe_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	/* Board supports stereo and quad configurations for capture */
+	if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
+		return 0;
+
+	runtime->hw.channels_max = 4;
+	return snd_pcm_hw_constraint_list(runtime, 0,
+					  SNDRV_PCM_HW_PARAM_CHANNELS,
+					  &constraints_channels);
+}
+
+static const struct snd_soc_ops bdw_rt5650_fe_ops = {
+	.startup = bdw_rt5650_fe_startup,
+};
+
 static int bdw_rt5650_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct bdw_rt5650_priv *bdw_rt5650 =
@@ -234,6 +262,7 @@ static struct snd_soc_dai_link bdw_rt5650_dais[] = {
 		.name = "System PCM",
 		.stream_name = "System Playback",
 		.dynamic = 1,
+		.ops = &bdw_rt5650_fe_ops,
 #if !IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
 		.init = bdw_rt5650_rtd_init,
 #endif
-- 
2.7.4

[PATCH v2 3/3] ASoC: broadwell: add channel constraint

[Brent Lu]

BDW boards using this machine driver supports only stereo capture and
playback. Implement a constraint to enforce it.

Signed-off-by: Brent Lu <brent.lu@intel.com>
---
 sound/soc/intel/boards/broadwell.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/sound/soc/intel/boards/broadwell.c b/sound/soc/intel/boards/broadwell.c
index f9a8336..07b2cfd 100644
--- a/sound/soc/intel/boards/broadwell.c
+++ b/sound/soc/intel/boards/broadwell.c
@@ -143,6 +143,31 @@ static int broadwell_rtd_init(struct snd_soc_pcm_runtime *rtd)
 }
 #endif
 
+static const unsigned int channels[] = {
+	2,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_channels = {
+	.count = ARRAY_SIZE(channels),
+	.list = channels,
+	.mask = 0,
+};
+
+static int broadwell_fe_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	/* Board supports stereo configuration only */
+	runtime->hw.channels_max = 2;
+	return snd_pcm_hw_constraint_list(runtime, 0,
+					  SNDRV_PCM_HW_PARAM_CHANNELS,
+					  &constraints_channels);
+}
+
+static const struct snd_soc_ops broadwell_fe_ops = {
+	.startup = broadwell_fe_startup,
+};
+
 SND_SOC_DAILINK_DEF(system,
 	DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));
 
@@ -180,6 +205,7 @@ static struct snd_soc_dai_link broadwell_rt286_dais[] = {
 		.init = broadwell_rtd_init,
 #endif
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
+		.ops = &broadwell_fe_ops,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(system, dummy, platform),
-- 
2.7.4

Re: [PATCH v2 0/3] add channel constraint for BDW machine drivers

[Pierre-Louis Bossart]

On 4/27/20 12:13 PM, Brent Lu wrote:
> The machine driver bdw-rt5650 (for Google buddy) supports 2 or 4-channel
> recording while other two drivers support only 2-channel recording. HW
> constraints are implemented to reflect the hardware limitation on BDW
> platform.
> 
> Changes since v1:
> - Change the patch title.
> - Remove the DUAL_CHANNEL and QUAD_CHANNEL macros which are too obvious.
> - Follow the naming convertion, using 'bdw_rt5650_' and 'bdw_rt5677_' to
>    name startup functions.
> - Refine the comments in startup functions.
> - Redesign the bdw_rt5650_fe_startup() function for readability.
> - Add an assignment to initialize runtime->hw.channels_max variable.

For the series

Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

> Brent Lu (3):
>    ASoC: bdw-rt5677: add channel constraint
>    ASoC: bdw-rt5650: add channel constraint
>    ASoC: broadwell: add channel constraint
> 
>   sound/soc/intel/boards/bdw-rt5650.c | 29 +++++++++++++++++++++++++++++
>   sound/soc/intel/boards/bdw-rt5677.c | 26 ++++++++++++++++++++++++++
>   sound/soc/intel/boards/broadwell.c  | 26 ++++++++++++++++++++++++++
>   3 files changed, 81 insertions(+)
> 

Re: [PATCH v2 0/3] add channel constraint for BDW machine drivers

[Cezary Rojewski]

On 2020-04-27 19:13, Brent Lu wrote:
> The machine driver bdw-rt5650 (for Google buddy) supports 2 or 4-channel
> recording while other two drivers support only 2-channel recording. HW
> constraints are implemented to reflect the hardware limitation on BDW
> platform.
> 
> Changes since v1:
> - Change the patch title.
> - Remove the DUAL_CHANNEL and QUAD_CHANNEL macros which are too obvious.
> - Follow the naming convertion, using 'bdw_rt5650_' and 'bdw_rt5677_' to
>    name startup functions.
> - Refine the comments in startup functions.
> - Redesign the bdw_rt5650_fe_startup() function for readability.
> - Add an assignment to initialize runtime->hw.channels_max variable.
> 

Thank you for addressing all listed issues.
I'll recheck hw constraints on my end just to be sure but this series 
looks good already, so:

Acked-by: Cezary Rojewski <cezary.rojewski@intel.com>

Re: [PATCH v2 0/3] add channel constraint for BDW machine drivers

[Mark Brown]

On Tue, 28 Apr 2020 01:13:31 +0800, Brent Lu wrote:
> The machine driver bdw-rt5650 (for Google buddy) supports 2 or 4-channel
> recording while other two drivers support only 2-channel recording. HW
> constraints are implemented to reflect the hardware limitation on BDW
> platform.
> 
> Changes since v1:
> - Change the patch title.
> - Remove the DUAL_CHANNEL and QUAD_CHANNEL macros which are too obvious.
> - Follow the naming convertion, using 'bdw_rt5650_' and 'bdw_rt5677_' to
>   name startup functions.
> - Refine the comments in startup functions.
> - Redesign the bdw_rt5650_fe_startup() function for readability.
> - Add an assignment to initialize runtime->hw.channels_max variable.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.8

Thanks!

[1/3] ASoC: bdw-rt5677: add channel constraint
      commit: e241f8e77958de2b7708e72d7159952d2bd1f0fe
[2/3] ASoC: bdw-rt5650: add channel constraint
      commit: 08d6713a4056cab5b29eb135eecb2e97492fc8d8
[3/3] ASoC: broadwell: add channel constraint
      commit: ad18763f46835b768714ac6de6dcf42384a261ca

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