[PATCH 0/6] ASoC: hdmi-codec: fixes and improvements

[PATCH 0/6] ASoC: hdmi-codec: fixes and improvements

[Jerome Brunet]

This patchset is a collection of fixes and improvement on the hdmi
codec driver. It should be completely transparent for the current users
of the codec.

The most important change is removal the current_substream pointer which
allows the codec to be used on codec-to-codec links. I plan to use this
for the HDMI sound support of the Amlogic g12a SoC family.

Jerome Brunet (6):
  ASoC: hdmi-codec: remove function name debug traces
  ASoC: hdmi-codec: unlock the device on startup errors
  ASoC: hdmi-codec: stream is already locked in hw_params
  ASoC: hdmi-codec: remove reference to the current substream
  ASoC: hdmi-codec: remove reference to the dai drivers in the private
    data
  ASoC: hdmi-codec: remove ops dependency on the dai id

 sound/soc/codecs/hdmi-codec.c | 259 ++++++++++++++++------------------
 1 file changed, 125 insertions(+), 134 deletions(-)

-- 
2.20.1

[PATCH 1/6] ASoC: hdmi-codec: remove function name debug traces

[Jerome Brunet]

Remove the debug traces only showing the function name on entry.
The same can be obtained using ftrace.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/codecs/hdmi-codec.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index e5b6769b9797..9dca24732069 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -416,8 +416,6 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 	int ret = 0;
 
-	dev_dbg(dai->dev, "%s()\n", __func__);
-
 	ret = hdmi_codec_new_stream(substream, dai);
 	if (ret)
 		return ret;
@@ -453,8 +451,6 @@ static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 
-	dev_dbg(dai->dev, "%s()\n", __func__);
-
 	WARN_ON(hcp->current_stream != substream);
 
 	hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
@@ -531,8 +527,6 @@ static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
 	struct hdmi_codec_daifmt cf = { 0 };
 	int ret = 0;
 
-	dev_dbg(dai->dev, "%s()\n", __func__);
-
 	if (dai->id == DAI_ID_SPDIF) {
 		cf.fmt = HDMI_SPDIF;
 	} else {
@@ -602,8 +596,6 @@ static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 
-	dev_dbg(dai->dev, "%s()\n", __func__);
-
 	if (hcp->hcd.ops->digital_mute)
 		return hcp->hcd.ops->digital_mute(dai->dev->parent,
 						  hcp->hcd.data, mute);
@@ -661,8 +653,6 @@ static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 	};
 	int ret;
 
-	dev_dbg(dai->dev, "%s()\n", __func__);
-
 	ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 				      NULL, drv->playback.channels_max, 0,
 				      &hcp->chmap_info);
@@ -759,8 +749,6 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 	int dai_count, i = 0;
 	int ret;
 
-	dev_dbg(dev, "%s()\n", __func__);
-
 	if (!hcd) {
 		dev_err(dev, "%s: No plalform data\n", __func__);
 		return -EINVAL;
-- 
2.20.1

Re: [PATCH 1/6] ASoC: hdmi-codec: remove function name debug traces

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 238 bytes --]

On Mon, Apr 29, 2019 at 03:29:38PM +0200, Jerome Brunet wrote:
> Remove the debug traces only showing the function name on entry.
> The same can be obtained using ftrace.

This doesn't apply against current code, please check and resend.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

[PATCH 2/6] ASoC: hdmi-codec: unlock the device on startup errors

[Jerome Brunet]

If the hdmi codec startup fails, it should clear the current_substream
pointer to free the device. This is properly done for the audio_startup()
callback but for snd_pcm_hw_constraint_eld().

Make sure the pointer cleared if an error is reported.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/codecs/hdmi-codec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 9dca24732069..4bd598253c62 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -437,8 +437,12 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 		if (!ret) {
 			ret = snd_pcm_hw_constraint_eld(substream->runtime,
 							hcp->eld);
-			if (ret)
+			if (ret) {
+				mutex_lock(&hcp->current_stream_lock);
+				hcp->current_stream = NULL;
+				mutex_unlock(&hcp->current_stream_lock);
 				return ret;
+			}
 		}
 		/* Select chmap supported */
 		hdmi_codec_eld_chmap(hcp);
-- 
2.20.1

Applied "ASoC: hdmi-codec: unlock the device on startup errors" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdmi-codec: unlock the device on startup errors

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.1

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 30180e8436046344b12813dc954b2e01dfdcd22d Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Mon, 29 Apr 2019 15:29:39 +0200
Subject: [PATCH] ASoC: hdmi-codec: unlock the device on startup errors

If the hdmi codec startup fails, it should clear the current_substream
pointer to free the device. This is properly done for the audio_startup()
callback but for snd_pcm_hw_constraint_eld().

Make sure the pointer cleared if an error is reported.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/hdmi-codec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 35df73e42cbc..fb2f0ac1f16f 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -439,8 +439,12 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 		if (!ret) {
 			ret = snd_pcm_hw_constraint_eld(substream->runtime,
 							hcp->eld);
-			if (ret)
+			if (ret) {
+				mutex_lock(&hcp->current_stream_lock);
+				hcp->current_stream = NULL;
+				mutex_unlock(&hcp->current_stream_lock);
 				return ret;
+			}
 		}
 		/* Select chmap supported */
 		hdmi_codec_eld_chmap(hcp);
-- 
2.20.1

Applied "ASoC: hdmi-codec: unlock the device on startup errors" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdmi-codec: unlock the device on startup errors

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.1

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 30180e8436046344b12813dc954b2e01dfdcd22d Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Mon, 29 Apr 2019 15:29:39 +0200
Subject: [PATCH] ASoC: hdmi-codec: unlock the device on startup errors

If the hdmi codec startup fails, it should clear the current_substream
pointer to free the device. This is properly done for the audio_startup()
callback but for snd_pcm_hw_constraint_eld().

Make sure the pointer cleared if an error is reported.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/hdmi-codec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 35df73e42cbc..fb2f0ac1f16f 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -439,8 +439,12 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 		if (!ret) {
 			ret = snd_pcm_hw_constraint_eld(substream->runtime,
 							hcp->eld);
-			if (ret)
+			if (ret) {
+				mutex_lock(&hcp->current_stream_lock);
+				hcp->current_stream = NULL;
+				mutex_unlock(&hcp->current_stream_lock);
 				return ret;
+			}
 		}
 		/* Select chmap supported */
 		hdmi_codec_eld_chmap(hcp);
-- 
2.20.1

Applied "ASoC: hdmi-codec: unlock the device on startup errors" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdmi-codec: unlock the device on startup errors

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.1

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 30180e8436046344b12813dc954b2e01dfdcd22d Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Mon, 29 Apr 2019 15:29:39 +0200
Subject: [PATCH] ASoC: hdmi-codec: unlock the device on startup errors

If the hdmi codec startup fails, it should clear the current_substream
pointer to free the device. This is properly done for the audio_startup()
callback but for snd_pcm_hw_constraint_eld().

Make sure the pointer cleared if an error is reported.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/hdmi-codec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 35df73e42cbc..fb2f0ac1f16f 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -439,8 +439,12 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 		if (!ret) {
 			ret = snd_pcm_hw_constraint_eld(substream->runtime,
 							hcp->eld);
-			if (ret)
+			if (ret) {
+				mutex_lock(&hcp->current_stream_lock);
+				hcp->current_stream = NULL;
+				mutex_unlock(&hcp->current_stream_lock);
 				return ret;
+			}
 		}
 		/* Select chmap supported */
 		hdmi_codec_eld_chmap(hcp);
-- 
2.20.1

[PATCH 3/6] ASoC: hdmi-codec: stream is already locked in hw_params

[Jerome Brunet]

startup() should have run before hw_params() is called, so the
current_substream pointer should already be properly set. There
is no reason to call hdmi_codec_new_stream() again in the
hw_params() callback

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/codecs/hdmi-codec.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 4bd598253c62..780f2008b271 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -495,10 +495,6 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
-	ret = hdmi_codec_new_stream(substream, dai);
-	if (ret)
-		return ret;
-
 	hdmi_audio_infoframe_init(&hp.cea);
 	hp.cea.channels = params_channels(params);
 	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
-- 
2.20.1

Applied "ASoC: hdmi-codec: stream is already locked in hw_params" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdmi-codec: stream is already locked in hw_params

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.2

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 726fc60babe4a46e946e69a9dbd3e21aaec4d58e Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Mon, 29 Apr 2019 15:29:40 +0200
Subject: [PATCH] ASoC: hdmi-codec: stream is already locked in hw_params

startup() should have run before hw_params() is called, so the
current_substream pointer should already be properly set. There
is no reason to call hdmi_codec_new_stream() again in the
hw_params() callback

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/hdmi-codec.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index b9d9dde9fbaf..ef6d6959ecc5 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -492,10 +492,6 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
-	ret = hdmi_codec_new_stream(substream, dai);
-	if (ret)
-		return ret;
-
 	hdmi_audio_infoframe_init(&hp.cea);
 	hp.cea.channels = params_channels(params);
 	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
-- 
2.20.1

Applied "ASoC: hdmi-codec: stream is already locked in hw_params" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdmi-codec: stream is already locked in hw_params

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.2

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 726fc60babe4a46e946e69a9dbd3e21aaec4d58e Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Mon, 29 Apr 2019 15:29:40 +0200
Subject: [PATCH] ASoC: hdmi-codec: stream is already locked in hw_params

startup() should have run before hw_params() is called, so the
current_substream pointer should already be properly set. There
is no reason to call hdmi_codec_new_stream() again in the
hw_params() callback

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/hdmi-codec.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index b9d9dde9fbaf..ef6d6959ecc5 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -492,10 +492,6 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
-	ret = hdmi_codec_new_stream(substream, dai);
-	if (ret)
-		return ret;
-
 	hdmi_audio_infoframe_init(&hp.cea);
 	hp.cea.channels = params_channels(params);
 	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
-- 
2.20.1

Applied "ASoC: hdmi-codec: stream is already locked in hw_params" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdmi-codec: stream is already locked in hw_params

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.2

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 726fc60babe4a46e946e69a9dbd3e21aaec4d58e Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Mon, 29 Apr 2019 15:29:40 +0200
Subject: [PATCH] ASoC: hdmi-codec: stream is already locked in hw_params

startup() should have run before hw_params() is called, so the
current_substream pointer should already be properly set. There
is no reason to call hdmi_codec_new_stream() again in the
hw_params() callback

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/hdmi-codec.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index b9d9dde9fbaf..ef6d6959ecc5 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -492,10 +492,6 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
-	ret = hdmi_codec_new_stream(substream, dai);
-	if (ret)
-		return ret;
-
 	hdmi_audio_infoframe_init(&hp.cea);
 	hp.cea.channels = params_channels(params);
 	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
-- 
2.20.1

[PATCH 4/6] ASoC: hdmi-codec: remove reference to the current substream

[Jerome Brunet]

If the hdmi-codec is on a codec-to-codec link, the substream pointer
it receives is completely made up by snd_soc_dai_link_event().
The pointer will be different between startup() and shutdown().

The hdmi-codec complains when this happens even if it is not really a
problem. The current_substream pointer is not used for anything useful
apart from getting the exclusive ownership of the device.

Remove current_substream pointer and replace the exclusive locking
mechanism with a simple variable and some atomic operations.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/codecs/hdmi-codec.c | 58 ++++++++++-------------------------
 1 file changed, 16 insertions(+), 42 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 780f2008b271..717d0949f8b4 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -280,11 +280,10 @@ struct hdmi_codec_priv {
 	struct hdmi_codec_pdata hcd;
 	struct snd_soc_dai_driver *daidrv;
 	struct hdmi_codec_daifmt daifmt[2];
-	struct mutex current_stream_lock;
-	struct snd_pcm_substream *current_stream;
 	uint8_t eld[MAX_ELD_BYTES];
 	struct snd_pcm_chmap *chmap_info;
 	unsigned int chmap_idx;
+	unsigned long busy;
 };
 
 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
@@ -392,42 +391,22 @@ static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
-static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
-				 struct snd_soc_dai *dai)
-{
-	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
-	int ret = 0;
-
-	mutex_lock(&hcp->current_stream_lock);
-	if (!hcp->current_stream) {
-		hcp->current_stream = substream;
-	} else if (hcp->current_stream != substream) {
-		dev_err(dai->dev, "Only one simultaneous stream supported!\n");
-		ret = -EINVAL;
-	}
-	mutex_unlock(&hcp->current_stream_lock);
-
-	return ret;
-}
-
 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 			      struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 	int ret = 0;
 
-	ret = hdmi_codec_new_stream(substream, dai);
-	if (ret)
-		return ret;
+	ret = test_and_set_bit(0, &hcp->busy);
+	if (ret) {
+		dev_err(dai->dev, "Only one simultaneous stream supported!\n");
+		return -EINVAL;
+	}
 
 	if (hcp->hcd.ops->audio_startup) {
 		ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
-		if (ret) {
-			mutex_lock(&hcp->current_stream_lock);
-			hcp->current_stream = NULL;
-			mutex_unlock(&hcp->current_stream_lock);
-			return ret;
-		}
+		if (ret)
+			goto err;
 	}
 
 	if (hcp->hcd.ops->get_eld) {
@@ -437,17 +416,18 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 		if (!ret) {
 			ret = snd_pcm_hw_constraint_eld(substream->runtime,
 							hcp->eld);
-			if (ret) {
-				mutex_lock(&hcp->current_stream_lock);
-				hcp->current_stream = NULL;
-				mutex_unlock(&hcp->current_stream_lock);
-				return ret;
-			}
+			if (ret)
+				goto err;
 		}
 		/* Select chmap supported */
 		hdmi_codec_eld_chmap(hcp);
 	}
 	return 0;
+
+err:
+	/* Release the exclusive lock on error */
+	clear_bit(0, &hcp->busy);
+	return ret;
 }
 
 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
@@ -455,14 +435,10 @@ static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 
-	WARN_ON(hcp->current_stream != substream);
-
 	hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 	hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 
-	mutex_lock(&hcp->current_stream_lock);
-	hcp->current_stream = NULL;
-	mutex_unlock(&hcp->current_stream_lock);
+	clear_bit(0, &hcp->busy);
 }
 
 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
@@ -766,8 +742,6 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	hcp->hcd = *hcd;
-	mutex_init(&hcp->current_stream_lock);
-
 	hcp->daidrv = devm_kcalloc(dev, dai_count, sizeof(*hcp->daidrv),
 				   GFP_KERNEL);
 	if (!hcp->daidrv)
-- 
2.20.1

[PATCH 5/6] ASoC: hdmi-codec: remove reference to the dai drivers in the private data

[Jerome Brunet]

Keeping the a pointer to the dai drivers is not necessary. It is not used
by the hdmi_codec after the probe.

Even if it was used, the 'struct snd_soc_dai_driver' can accessed through
the 'struct snd_soc_dai' so keeping the pointer in the private data
structure is not useful.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/codecs/hdmi-codec.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 717d0949f8b4..bcc2e5c3bf43 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -278,7 +278,6 @@ static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
 
 struct hdmi_codec_priv {
 	struct hdmi_codec_pdata hcd;
-	struct snd_soc_dai_driver *daidrv;
 	struct hdmi_codec_daifmt daifmt[2];
 	uint8_t eld[MAX_ELD_BYTES];
 	struct snd_pcm_chmap *chmap_info;
@@ -720,6 +719,7 @@ static const struct snd_soc_component_driver hdmi_driver = {
 static int hdmi_codec_probe(struct platform_device *pdev)
 {
 	struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
+	struct snd_soc_dai_driver *daidrv;
 	struct device *dev = &pdev->dev;
 	struct hdmi_codec_priv *hcp;
 	int dai_count, i = 0;
@@ -742,25 +742,23 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	hcp->hcd = *hcd;
-	hcp->daidrv = devm_kcalloc(dev, dai_count, sizeof(*hcp->daidrv),
-				   GFP_KERNEL);
-	if (!hcp->daidrv)
+	daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL);
+	if (!daidrv)
 		return -ENOMEM;
 
 	if (hcd->i2s) {
-		hcp->daidrv[i] = hdmi_i2s_dai;
-		hcp->daidrv[i].playback.channels_max =
-			hcd->max_i2s_channels;
+		daidrv[i] = hdmi_i2s_dai;
+		daidrv[i].playback.channels_max = hcd->max_i2s_channels;
 		i++;
 	}
 
 	if (hcd->spdif)
-		hcp->daidrv[i] = hdmi_spdif_dai;
+		daidrv[i] = hdmi_spdif_dai;
 
 	dev_set_drvdata(dev, hcp);
 
-	ret = devm_snd_soc_register_component(dev, &hdmi_driver, hcp->daidrv,
-				     dai_count);
+	ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv,
+					      dai_count);
 	if (ret) {
 		dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
 			__func__, ret);
-- 
2.20.1

[PATCH 6/6] ASoC: hdmi-codec: remove ops dependency on the dai id

[Jerome Brunet]

The dependency on the dai_id can be removed by setting different ops
for the i2s and spdif dai and storing the dai format information in
each dai structure. It simplies the code a bit.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/codecs/hdmi-codec.c | 173 ++++++++++++++++++++--------------
 1 file changed, 102 insertions(+), 71 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index bcc2e5c3bf43..4b56fc92a80d 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -278,7 +278,6 @@ static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
 
 struct hdmi_codec_priv {
 	struct hdmi_codec_pdata hcd;
-	struct hdmi_codec_daifmt daifmt[2];
 	uint8_t eld[MAX_ELD_BYTES];
 	struct snd_pcm_chmap *chmap_info;
 	unsigned int chmap_idx;
@@ -445,6 +444,7 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+	struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 	struct hdmi_codec_params hp = {
 		.iec = {
 			.status = { 0 },
@@ -492,79 +492,85 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 	hp.channels = params_channels(params);
 
 	return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
-				       &hcp->daifmt[dai->id], &hp);
+				       cf, &hp);
 }
 
-static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
-			      unsigned int fmt)
+static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai,
+				  unsigned int fmt)
 {
-	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
-	struct hdmi_codec_daifmt cf = { 0 };
-	int ret = 0;
-
-	if (dai->id == DAI_ID_SPDIF) {
-		cf.fmt = HDMI_SPDIF;
-	} else {
-		switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
-		case SND_SOC_DAIFMT_CBM_CFM:
-			cf.bit_clk_master = 1;
-			cf.frame_clk_master = 1;
-			break;
-		case SND_SOC_DAIFMT_CBS_CFM:
-			cf.frame_clk_master = 1;
-			break;
-		case SND_SOC_DAIFMT_CBM_CFS:
-			cf.bit_clk_master = 1;
-			break;
-		case SND_SOC_DAIFMT_CBS_CFS:
-			break;
-		default:
-			return -EINVAL;
-		}
+	struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
+
+	/* Reset daifmt */
+	memset(cf, 0, sizeof(*cf));
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		cf->bit_clk_master = 1;
+		cf->frame_clk_master = 1;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFM:
+		cf->frame_clk_master = 1;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		cf->bit_clk_master = 1;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		break;
+	default:
+		return -EINVAL;
+	}
 
-		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
-		case SND_SOC_DAIFMT_NB_NF:
-			break;
-		case SND_SOC_DAIFMT_NB_IF:
-			cf.frame_clk_inv = 1;
-			break;
-		case SND_SOC_DAIFMT_IB_NF:
-			cf.bit_clk_inv = 1;
-			break;
-		case SND_SOC_DAIFMT_IB_IF:
-			cf.frame_clk_inv = 1;
-			cf.bit_clk_inv = 1;
-			break;
-		}
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		cf->frame_clk_inv = 1;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		cf->bit_clk_inv = 1;
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		cf->frame_clk_inv = 1;
+		cf->bit_clk_inv = 1;
+		break;
+	}
 
-		switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
-		case SND_SOC_DAIFMT_I2S:
-			cf.fmt = HDMI_I2S;
-			break;
-		case SND_SOC_DAIFMT_DSP_A:
-			cf.fmt = HDMI_DSP_A;
-			break;
-		case SND_SOC_DAIFMT_DSP_B:
-			cf.fmt = HDMI_DSP_B;
-			break;
-		case SND_SOC_DAIFMT_RIGHT_J:
-			cf.fmt = HDMI_RIGHT_J;
-			break;
-		case SND_SOC_DAIFMT_LEFT_J:
-			cf.fmt = HDMI_LEFT_J;
-			break;
-		case SND_SOC_DAIFMT_AC97:
-			cf.fmt = HDMI_AC97;
-			break;
-		default:
-			dev_err(dai->dev, "Invalid DAI interface format\n");
-			return -EINVAL;
-		}
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		cf->fmt = HDMI_I2S;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		cf->fmt = HDMI_DSP_A;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		cf->fmt = HDMI_DSP_B;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		cf->fmt = HDMI_RIGHT_J;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		cf->fmt = HDMI_LEFT_J;
+		break;
+	case SND_SOC_DAIFMT_AC97:
+		cf->fmt = HDMI_AC97;
+		break;
+	default:
+		dev_err(dai->dev, "Invalid DAI interface format\n");
+		return -EINVAL;
 	}
 
-	hcp->daifmt[dai->id] = cf;
+	return 0;
+}
+
+static int hdmi_codec_spdif_set_fmt(struct snd_soc_dai *dai,
+				    unsigned int fmt)
+{
+	struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
+
+	/* No need to reset the format, it is always the same for spdif */
+	cf->fmt = HDMI_SPDIF;
 
-	return ret;
+	return 0;
 }
 
 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
@@ -578,14 +584,21 @@ static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 	return 0;
 }
 
-static const struct snd_soc_dai_ops hdmi_dai_ops = {
+static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
 	.startup	= hdmi_codec_startup,
 	.shutdown	= hdmi_codec_shutdown,
 	.hw_params	= hdmi_codec_hw_params,
-	.set_fmt	= hdmi_codec_set_fmt,
+	.set_fmt	= hdmi_codec_i2s_set_fmt,
 	.digital_mute	= hdmi_codec_digital_mute,
 };
 
+static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
+	.startup	= hdmi_codec_startup,
+	.shutdown	= hdmi_codec_shutdown,
+	.hw_params	= hdmi_codec_hw_params,
+	.set_fmt	= hdmi_codec_spdif_set_fmt,
+	.digital_mute	= hdmi_codec_digital_mute,
+};
 
 #define HDMI_RATES	(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 			 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
@@ -653,20 +666,37 @@ static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 static int hdmi_dai_probe(struct snd_soc_dai *dai)
 {
 	struct snd_soc_dapm_context *dapm;
+	struct hdmi_codec_daifmt *daifmt;
 	struct snd_soc_dapm_route route = {
 		.sink = "TX",
 		.source = dai->driver->playback.stream_name,
 	};
+	int ret;
 
 	dapm = snd_soc_component_get_dapm(dai->component);
+	ret = snd_soc_dapm_add_routes(dapm, &route, 1);
+	if (ret)
+		return ret;
 
-	return snd_soc_dapm_add_routes(dapm, &route, 1);
+	daifmt = kzalloc(sizeof(*daifmt), GFP_KERNEL);
+	if (!daifmt)
+		return -ENOMEM;
+
+	dai->playback_dma_data = daifmt;
+	return 0;
+}
+
+static int hdmi_codec_dai_remove(struct snd_soc_dai *dai)
+{
+	kfree(dai->playback_dma_data);
+	return 0;
 }
 
 static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 	.name = "i2s-hifi",
 	.id = DAI_ID_I2S,
 	.probe = hdmi_dai_probe,
+	.remove = hdmi_codec_dai_remove,
 	.playback = {
 		.stream_name = "I2S Playback",
 		.channels_min = 2,
@@ -675,7 +705,7 @@ static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 		.formats = I2S_FORMATS,
 		.sig_bits = 24,
 	},
-	.ops = &hdmi_dai_ops,
+	.ops = &hdmi_codec_i2s_dai_ops,
 	.pcm_new = hdmi_codec_pcm_new,
 };
 
@@ -683,6 +713,7 @@ static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 	.name = "spdif-hifi",
 	.id = DAI_ID_SPDIF,
 	.probe = hdmi_dai_probe,
+	.remove = hdmi_codec_dai_remove,
 	.playback = {
 		.stream_name = "SPDIF Playback",
 		.channels_min = 2,
@@ -690,7 +721,7 @@ static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 		.rates = HDMI_RATES,
 		.formats = SPDIF_FORMATS,
 	},
-	.ops = &hdmi_dai_ops,
+	.ops = &hdmi_codec_spdif_dai_ops,
 	.pcm_new = hdmi_codec_pcm_new,
 };
 
-- 
2.20.1