[PATCH v2 0/3] ASoC: mediatek: mt8173-rt5650: HDMI jack reporting

[PATCH v2 0/3] ASoC: mediatek: mt8173-rt5650: HDMI jack reporting

[Tzung-Bi Shih]

The series supports HDMI jack reporting to mt8173-rt5650.

The 1st patch is less related.  It stops running in probe() if failed
to register audio driver.

The 2nd patch supports jack reporting in DRM driver.

The 3rd patch supports jack reporting in mt8173-rt5650 ASoC machine
driver.

Changes from v1:
- refactor the 2nd patch to simplify the code

Tzung-Bi Shih (3):
  drm/mediatek: exit earlier if failed to register audio driver
  drm/mediatek: support HDMI jack status reporting
  ASoC: mediatek: mt8173-rt5650: support HDMI jack reporting

 drivers/gpu/drm/mediatek/mtk_hdmi.c       | 45 ++++++++++++++++++++---
 sound/soc/mediatek/mt8173/mt8173-rt5650.c | 17 ++++++++-
 2 files changed, 55 insertions(+), 7 deletions(-)

-- 
2.25.0.341.g760bfbb309-goog


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[PATCH v2 1/3] drm/mediatek: exit earlier if failed to register audio driver

[Tzung-Bi Shih]

Exits earlier if register_audio_driver() returns errors.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index c79b1f855d89..23c2b0e8693d 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1656,7 +1656,7 @@ static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
 	.get_eld = mtk_hdmi_audio_get_eld,
 };
 
-static void mtk_hdmi_register_audio_driver(struct device *dev)
+static int mtk_hdmi_register_audio_driver(struct device *dev)
 {
 	struct hdmi_codec_pdata codec_data = {
 		.ops = &mtk_hdmi_audio_codec_ops,
@@ -1669,9 +1669,10 @@ static void mtk_hdmi_register_audio_driver(struct device *dev)
 					     PLATFORM_DEVID_AUTO, &codec_data,
 					     sizeof(codec_data));
 	if (IS_ERR(pdev))
-		return;
+		return PTR_ERR(pdev);
 
 	DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME);
+	return 0;
 }
 
 static int mtk_drm_hdmi_probe(struct platform_device *pdev)
@@ -1705,7 +1706,11 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	mtk_hdmi_register_audio_driver(dev);
+	ret = mtk_hdmi_register_audio_driver(dev);
+	if (ret) {
+		dev_err(dev, "Failed to register audio driver: %d\n", ret);
+		return ret;
+	}
 
 	hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs;
 	hdmi->bridge.of_node = pdev->dev.of_node;
-- 
2.25.0.341.g760bfbb309-goog


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[PATCH v2 2/3] drm/mediatek: support HDMI jack status reporting

[Tzung-Bi Shih]

1.
Provides a callback (i.e. mtk_hdmi_audio_hook_plugged_cb) to hdmi-codec.
When ASoC machine driver calls hdmi_codec_set_jack_detect(), the
callback will be invoked to save plugged_cb and codec_dev parameters.

+---------+  set_jack_  +------------+ plugged_cb  +----------+
| machine | ----------> | hdmi-codec | ----------> | mtk-hdmi |
+---------+  detect()   +------------+ codec_dev   +----------+

2.
When there is any jack status changes, mtk-hdmi will call the
plugged_cb() to notify hdmi-codec.  And then hdmi-codec will call
snd_soc_jack_report().

+----------+ plugged_cb  +------------+
| mtk-hdmi | ----------> | hdmi-codec | -> snd_soc_jack_report()
+----------+ codec_dev   +------------+
             connector_status

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 34 ++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 23c2b0e8693d..fccdd975947d 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -169,6 +169,8 @@ struct mtk_hdmi {
 	bool audio_enable;
 	bool powered;
 	bool enabled;
+	hdmi_codec_plugged_cb plugged_cb;
+	struct device *codec_dev;
 };
 
 static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
@@ -1194,13 +1196,23 @@ static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi)
 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
 }
 
+static enum drm_connector_status
+mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi)
+{
+	bool connected = mtk_cec_hpd_high(hdmi->cec_dev);
+
+	if (hdmi->plugged_cb && hdmi->codec_dev)
+		hdmi->plugged_cb(hdmi->codec_dev, connected);
+
+	return connected ?
+	       connector_status_connected : connector_status_disconnected;
+}
+
 static enum drm_connector_status hdmi_conn_detect(struct drm_connector *conn,
 						  bool force)
 {
 	struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn);
-
-	return mtk_cec_hpd_high(hdmi->cec_dev) ?
-	       connector_status_connected : connector_status_disconnected;
+	return mtk_hdmi_update_plugged_status(hdmi);
 }
 
 static void hdmi_conn_destroy(struct drm_connector *conn)
@@ -1648,20 +1660,36 @@ static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
 	return 0;
 }
 
+static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data,
+					  hdmi_codec_plugged_cb fn,
+					  struct device *codec_dev)
+{
+	struct mtk_hdmi *hdmi = data;
+
+	hdmi->plugged_cb = fn;
+	hdmi->codec_dev = codec_dev;
+	mtk_hdmi_update_plugged_status(hdmi);
+
+	return 0;
+}
+
 static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
 	.hw_params = mtk_hdmi_audio_hw_params,
 	.audio_startup = mtk_hdmi_audio_startup,
 	.audio_shutdown = mtk_hdmi_audio_shutdown,
 	.digital_mute = mtk_hdmi_audio_digital_mute,
 	.get_eld = mtk_hdmi_audio_get_eld,
+	.hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb,
 };
 
 static int mtk_hdmi_register_audio_driver(struct device *dev)
 {
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
 	struct hdmi_codec_pdata codec_data = {
 		.ops = &mtk_hdmi_audio_codec_ops,
 		.max_i2s_channels = 2,
 		.i2s = 1,
+		.data = hdmi,
 	};
 	struct platform_device *pdev;
 
-- 
2.25.0.341.g760bfbb309-goog


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[PATCH v2 3/3] ASoC: mediatek: mt8173-rt5650: support HDMI jack reporting

[Tzung-Bi Shih]

Uses hdmi-codec to support HDMI jack reporting.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
---
 sound/soc/mediatek/mt8173/mt8173-rt5650.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/sound/soc/mediatek/mt8173/mt8173-rt5650.c b/sound/soc/mediatek/mt8173/mt8173-rt5650.c
index ef6f23675286..849b050a54d1 100644
--- a/sound/soc/mediatek/mt8173/mt8173-rt5650.c
+++ b/sound/soc/mediatek/mt8173/mt8173-rt5650.c
@@ -11,6 +11,7 @@
 #include <linux/of_gpio.h>
 #include <sound/soc.h>
 #include <sound/jack.h>
+#include <sound/hdmi-codec.h>
 #include "../../codecs/rt5645.h"
 
 #define MCLK_FOR_CODECS		12288000
@@ -98,7 +99,7 @@ static const struct snd_soc_ops mt8173_rt5650_ops = {
 	.hw_params = mt8173_rt5650_hw_params,
 };
 
-static struct snd_soc_jack mt8173_rt5650_jack;
+static struct snd_soc_jack mt8173_rt5650_jack, mt8173_rt5650_hdmi_jack;
 
 static int mt8173_rt5650_init(struct snd_soc_pcm_runtime *runtime)
 {
@@ -144,6 +145,19 @@ static int mt8173_rt5650_init(struct snd_soc_pcm_runtime *runtime)
 				      &mt8173_rt5650_jack);
 }
 
+static int mt8173_rt5650_hdmi_init(struct snd_soc_pcm_runtime *rtd)
+{
+	int ret;
+
+	ret = snd_soc_card_jack_new(rtd->card, "HDMI Jack", SND_JACK_LINEOUT,
+				    &mt8173_rt5650_hdmi_jack, NULL, 0);
+	if (ret)
+		return ret;
+
+	return hdmi_codec_set_jack_detect(rtd->codec_dai->component,
+					  &mt8173_rt5650_hdmi_jack);
+}
+
 enum {
 	DAI_LINK_PLAYBACK,
 	DAI_LINK_CAPTURE,
@@ -222,6 +236,7 @@ static struct snd_soc_dai_link mt8173_rt5650_dais[] = {
 		.name = "HDMI BE",
 		.no_pcm = 1,
 		.dpcm_playback = 1,
+		.init = mt8173_rt5650_hdmi_init,
 		SND_SOC_DAILINK_REG(hdmi_be),
 	},
 };
-- 
2.25.0.341.g760bfbb309-goog


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Re: [PATCH v2 1/3] drm/mediatek: exit earlier if failed to register audio driver

[CK Hu]

Hi, Tzung-Bi:

On Thu, 2020-02-06 at 11:17 +0800, Tzung-Bi Shih wrote:
> Exits earlier if register_audio_driver() returns errors.
> 

Acked-by: CK Hu <ck.hu@mediatek.com>

> Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index c79b1f855d89..23c2b0e8693d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -1656,7 +1656,7 @@ static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
>  	.get_eld = mtk_hdmi_audio_get_eld,
>  };
>  
> -static void mtk_hdmi_register_audio_driver(struct device *dev)
> +static int mtk_hdmi_register_audio_driver(struct device *dev)
>  {
>  	struct hdmi_codec_pdata codec_data = {
>  		.ops = &mtk_hdmi_audio_codec_ops,
> @@ -1669,9 +1669,10 @@ static void mtk_hdmi_register_audio_driver(struct device *dev)
>  					     PLATFORM_DEVID_AUTO, &codec_data,
>  					     sizeof(codec_data));
>  	if (IS_ERR(pdev))
> -		return;
> +		return PTR_ERR(pdev);
>  
>  	DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME);
> +	return 0;
>  }
>  
>  static int mtk_drm_hdmi_probe(struct platform_device *pdev)
> @@ -1705,7 +1706,11 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	mtk_hdmi_register_audio_driver(dev);
> +	ret = mtk_hdmi_register_audio_driver(dev);
> +	if (ret) {
> +		dev_err(dev, "Failed to register audio driver: %d\n", ret);
> +		return ret;
> +	}
>  
>  	hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs;
>  	hdmi->bridge.of_node = pdev->dev.of_node;

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Applied "drm/mediatek: support HDMI jack status reporting" to the asoc tree

[Mark Brown]

The patch

   drm/mediatek: support HDMI jack status reporting

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.7

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 5d3c644773925c3568617435e42a9404a114c428 Mon Sep 17 00:00:00 2001
From: Tzung-Bi Shih <tzungbi@google.com>
Date: Thu, 6 Feb 2020 11:17:51 +0800
Subject: [PATCH] drm/mediatek: support HDMI jack status reporting

1.
Provides a callback (i.e. mtk_hdmi_audio_hook_plugged_cb) to hdmi-codec.
When ASoC machine driver calls hdmi_codec_set_jack_detect(), the
callback will be invoked to save plugged_cb and codec_dev parameters.

+---------+  set_jack_  +------------+ plugged_cb  +----------+
| machine | ----------> | hdmi-codec | ----------> | mtk-hdmi |
+---------+  detect()   +------------+ codec_dev   +----------+

2.
When there is any jack status changes, mtk-hdmi will call the
plugged_cb() to notify hdmi-codec.  And then hdmi-codec will call
snd_soc_jack_report().

+----------+ plugged_cb  +------------+
| mtk-hdmi | ----------> | hdmi-codec | -> snd_soc_jack_report()
+----------+ codec_dev   +------------+
             connector_status

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200206102509.2.I230fd59de28e73934a91cb01424e25b9e84727f4@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 34 ++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index fcec06e63e0c..03aeb73005ef 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -169,6 +169,8 @@ struct mtk_hdmi {
 	bool audio_enable;
 	bool powered;
 	bool enabled;
+	hdmi_codec_plugged_cb plugged_cb;
+	struct device *codec_dev;
 };
 
 static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
@@ -1194,13 +1196,23 @@ static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi)
 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
 }
 
+static enum drm_connector_status
+mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi)
+{
+	bool connected = mtk_cec_hpd_high(hdmi->cec_dev);
+
+	if (hdmi->plugged_cb && hdmi->codec_dev)
+		hdmi->plugged_cb(hdmi->codec_dev, connected);
+
+	return connected ?
+	       connector_status_connected : connector_status_disconnected;
+}
+
 static enum drm_connector_status hdmi_conn_detect(struct drm_connector *conn,
 						  bool force)
 {
 	struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn);
-
-	return mtk_cec_hpd_high(hdmi->cec_dev) ?
-	       connector_status_connected : connector_status_disconnected;
+	return mtk_hdmi_update_plugged_status(hdmi);
 }
 
 static void hdmi_conn_destroy(struct drm_connector *conn)
@@ -1651,20 +1663,36 @@ static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
 	return 0;
 }
 
+static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data,
+					  hdmi_codec_plugged_cb fn,
+					  struct device *codec_dev)
+{
+	struct mtk_hdmi *hdmi = data;
+
+	hdmi->plugged_cb = fn;
+	hdmi->codec_dev = codec_dev;
+	mtk_hdmi_update_plugged_status(hdmi);
+
+	return 0;
+}
+
 static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
 	.hw_params = mtk_hdmi_audio_hw_params,
 	.audio_startup = mtk_hdmi_audio_startup,
 	.audio_shutdown = mtk_hdmi_audio_shutdown,
 	.digital_mute = mtk_hdmi_audio_digital_mute,
 	.get_eld = mtk_hdmi_audio_get_eld,
+	.hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb,
 };
 
 static int mtk_hdmi_register_audio_driver(struct device *dev)
 {
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
 	struct hdmi_codec_pdata codec_data = {
 		.ops = &mtk_hdmi_audio_codec_ops,
 		.max_i2s_channels = 2,
 		.i2s = 1,
+		.data = hdmi,
 	};
 	struct platform_device *pdev;
 
-- 
2.20.1


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Applied "drm/mediatek: exit earlier if failed to register audio driver" to the asoc tree

[Mark Brown]

The patch

   drm/mediatek: exit earlier if failed to register audio driver

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.7

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 f9eb06cd0cdd50a3125bc9c62cdc997dc461eae7 Mon Sep 17 00:00:00 2001
From: Tzung-Bi Shih <tzungbi@google.com>
Date: Thu, 6 Feb 2020 11:17:50 +0800
Subject: [PATCH] drm/mediatek: exit earlier if failed to register audio driver

Exits earlier if register_audio_driver() returns errors.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Acked-by: CK Hu <ck.hu@mediatek.com>
Link: https://lore.kernel.org/r/20200206102509.1.Ieba8d422486264eb7aaa3aa257620a1b0c74c6db@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 5e4a4dbda443..fcec06e63e0c 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1659,7 +1659,7 @@ static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
 	.get_eld = mtk_hdmi_audio_get_eld,
 };
 
-static void mtk_hdmi_register_audio_driver(struct device *dev)
+static int mtk_hdmi_register_audio_driver(struct device *dev)
 {
 	struct hdmi_codec_pdata codec_data = {
 		.ops = &mtk_hdmi_audio_codec_ops,
@@ -1672,9 +1672,10 @@ static void mtk_hdmi_register_audio_driver(struct device *dev)
 					     PLATFORM_DEVID_AUTO, &codec_data,
 					     sizeof(codec_data));
 	if (IS_ERR(pdev))
-		return;
+		return PTR_ERR(pdev);
 
 	DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME);
+	return 0;
 }
 
 static int mtk_drm_hdmi_probe(struct platform_device *pdev)
@@ -1708,7 +1709,11 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	mtk_hdmi_register_audio_driver(dev);
+	ret = mtk_hdmi_register_audio_driver(dev);
+	if (ret) {
+		dev_err(dev, "Failed to register audio driver: %d\n", ret);
+		return ret;
+	}
 
 	hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs;
 	hdmi->bridge.of_node = pdev->dev.of_node;
-- 
2.20.1


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Applied "ASoC: mediatek: mt8173-rt5650: support HDMI jack reporting" to the asoc tree

[Mark Brown]

The patch

   ASoC: mediatek: mt8173-rt5650: support HDMI jack reporting

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.7

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 c8b60c6d93b8104f5a8d9fbb4f52ad88df918a44 Mon Sep 17 00:00:00 2001
From: Tzung-Bi Shih <tzungbi@google.com>
Date: Thu, 6 Feb 2020 11:17:52 +0800
Subject: [PATCH] ASoC: mediatek: mt8173-rt5650: support HDMI jack reporting

Uses hdmi-codec to support HDMI jack reporting.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200206102509.3.I253f51edff62df1d88005de12ba601aa029b1e99@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/mediatek/mt8173/mt8173-rt5650.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/sound/soc/mediatek/mt8173/mt8173-rt5650.c b/sound/soc/mediatek/mt8173/mt8173-rt5650.c
index ef6f23675286..849b050a54d1 100644
--- a/sound/soc/mediatek/mt8173/mt8173-rt5650.c
+++ b/sound/soc/mediatek/mt8173/mt8173-rt5650.c
@@ -11,6 +11,7 @@
 #include <linux/of_gpio.h>
 #include <sound/soc.h>
 #include <sound/jack.h>
+#include <sound/hdmi-codec.h>
 #include "../../codecs/rt5645.h"
 
 #define MCLK_FOR_CODECS		12288000
@@ -98,7 +99,7 @@ static const struct snd_soc_ops mt8173_rt5650_ops = {
 	.hw_params = mt8173_rt5650_hw_params,
 };
 
-static struct snd_soc_jack mt8173_rt5650_jack;
+static struct snd_soc_jack mt8173_rt5650_jack, mt8173_rt5650_hdmi_jack;
 
 static int mt8173_rt5650_init(struct snd_soc_pcm_runtime *runtime)
 {
@@ -144,6 +145,19 @@ static int mt8173_rt5650_init(struct snd_soc_pcm_runtime *runtime)
 				      &mt8173_rt5650_jack);
 }
 
+static int mt8173_rt5650_hdmi_init(struct snd_soc_pcm_runtime *rtd)
+{
+	int ret;
+
+	ret = snd_soc_card_jack_new(rtd->card, "HDMI Jack", SND_JACK_LINEOUT,
+				    &mt8173_rt5650_hdmi_jack, NULL, 0);
+	if (ret)
+		return ret;
+
+	return hdmi_codec_set_jack_detect(rtd->codec_dai->component,
+					  &mt8173_rt5650_hdmi_jack);
+}
+
 enum {
 	DAI_LINK_PLAYBACK,
 	DAI_LINK_CAPTURE,
@@ -222,6 +236,7 @@ static struct snd_soc_dai_link mt8173_rt5650_dais[] = {
 		.name = "HDMI BE",
 		.no_pcm = 1,
 		.dpcm_playback = 1,
+		.init = mt8173_rt5650_hdmi_init,
 		SND_SOC_DAILINK_REG(hdmi_be),
 	},
 };
-- 
2.20.1


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Re: [PATCH v2 2/3] drm/mediatek: support HDMI jack status reporting

[CK Hu]

Hi, Tzung-Bi:

On Thu, 2020-02-06 at 11:17 +0800, Tzung-Bi Shih wrote:
> 1.
> Provides a callback (i.e. mtk_hdmi_audio_hook_plugged_cb) to hdmi-codec.
> When ASoC machine driver calls hdmi_codec_set_jack_detect(), the
> callback will be invoked to save plugged_cb and codec_dev parameters.
> 
> +---------+  set_jack_  +------------+ plugged_cb  +----------+
> | machine | ----------> | hdmi-codec | ----------> | mtk-hdmi |
> +---------+  detect()   +------------+ codec_dev   +----------+
> 
> 2.
> When there is any jack status changes, mtk-hdmi will call the
> plugged_cb() to notify hdmi-codec.  And then hdmi-codec will call
> snd_soc_jack_report().
> 
> +----------+ plugged_cb  +------------+
> | mtk-hdmi | ----------> | hdmi-codec | -> snd_soc_jack_report()
> +----------+ codec_dev   +------------+
>              connector_status
> 
> Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 34 ++++++++++++++++++++++++++---
>  1 file changed, 31 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 23c2b0e8693d..fccdd975947d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -169,6 +169,8 @@ struct mtk_hdmi {
>  	bool audio_enable;
>  	bool powered;
>  	bool enabled;
> +	hdmi_codec_plugged_cb plugged_cb;
> +	struct device *codec_dev;
>  };
>  
>  static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
> @@ -1194,13 +1196,23 @@ static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi)
>  	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
>  }
>  
> +static enum drm_connector_status
> +mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi)
> +{
> +	bool connected = mtk_cec_hpd_high(hdmi->cec_dev);
> +
> +	if (hdmi->plugged_cb && hdmi->codec_dev)
> +		hdmi->plugged_cb(hdmi->codec_dev, connected);
> +
> +	return connected ?
> +	       connector_status_connected : connector_status_disconnected;
> +}
> +
>  static enum drm_connector_status hdmi_conn_detect(struct drm_connector *conn,
>  						  bool force)
>  {
>  	struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn);
> -
> -	return mtk_cec_hpd_high(hdmi->cec_dev) ?
> -	       connector_status_connected : connector_status_disconnected;
> +	return mtk_hdmi_update_plugged_status(hdmi);
>  }
>  
>  static void hdmi_conn_destroy(struct drm_connector *conn)
> @@ -1648,20 +1660,36 @@ static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
>  	return 0;
>  }
>  
> +static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data,
> +					  hdmi_codec_plugged_cb fn,
> +					  struct device *codec_dev)
> +{
> +	struct mtk_hdmi *hdmi = data;
> +
> +	hdmi->plugged_cb = fn;
> +	hdmi->codec_dev = codec_dev;
> +	mtk_hdmi_update_plugged_status(hdmi);

I think hdmi_conn_detect() and mtk_hdmi_audio_hook_plugged_cb() would be
called in different thread. So it's necessary to use a mutex to protect
this.

Regards,
CK

> +
> +	return 0;
> +}
> +
>  static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
>  	.hw_params = mtk_hdmi_audio_hw_params,
>  	.audio_startup = mtk_hdmi_audio_startup,
>  	.audio_shutdown = mtk_hdmi_audio_shutdown,
>  	.digital_mute = mtk_hdmi_audio_digital_mute,
>  	.get_eld = mtk_hdmi_audio_get_eld,
> +	.hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb,
>  };
>  
>  static int mtk_hdmi_register_audio_driver(struct device *dev)
>  {
> +	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
>  	struct hdmi_codec_pdata codec_data = {
>  		.ops = &mtk_hdmi_audio_codec_ops,
>  		.max_i2s_channels = 2,
>  		.i2s = 1,
> +		.data = hdmi,
>  	};
>  	struct platform_device *pdev;
>  

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Re: [PATCH v2 2/3] drm/mediatek: support HDMI jack status reporting

[Tzung-Bi Shih]

On Wed, Feb 12, 2020 at 4:19 PM CK Hu <ck.hu@mediatek.com> wrote:
> I think hdmi_conn_detect() and mtk_hdmi_audio_hook_plugged_cb() would be
> called in different thread. So it's necessary to use a mutex to protect
> this.

Thanks for the reminder.  I feel using mutex here is overkill.  Please
see https://patchwork.kernel.org/patch/11378413/ for my proposed
solution.

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Re: [PATCH v2 2/3] drm/mediatek: support HDMI jack status reporting

[CK Hu]

Hi, Tzung-Bi:

On Wed, 2020-02-12 at 19:31 +0800, Tzung-Bi Shih wrote:
> On Wed, Feb 12, 2020 at 4:19 PM CK Hu <ck.hu@mediatek.com> wrote:
> > I think hdmi_conn_detect() and mtk_hdmi_audio_hook_plugged_cb() would be
> > called in different thread. So it's necessary to use a mutex to protect
> > this.
> 
> Thanks for the reminder.  I feel using mutex here is overkill.  Please
> see https://patchwork.kernel.org/patch/11378413/ for my proposed
> solution.
> 

I'm not only consider the race condition of plugged_cb and codec_dev. I
also care about the atomic of mtk_cec_hpd_high() and hdmi->plugged_cb().
If these two function is not an atomic operation, below is an example of
problem:

<Status disconnected>
1. Thread A call mtk_hdmi_audio_hook_plugged_cb()
2. Thread A call mtk_cec_hpd_high() and get disconnected.
<Status connected>
3. Thread B call hdmi_conn_detect()
4. Thread B call mtk_cec_hpd_high() and get connected
5. Thread B callback plugged_cb() with connected
6. Thread A callback plugged_cb() with disconnected (Bug here)

Regards,
CK

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Re: [PATCH v2 2/3] drm/mediatek: support HDMI jack status reporting

[Tzung-Bi Shih]

On Thu, Feb 13, 2020 at 9:57 AM CK Hu <ck.hu@mediatek.com> wrote:
> I'm not only consider the race condition of plugged_cb and codec_dev. I
> also care about the atomic of mtk_cec_hpd_high() and hdmi->plugged_cb().
> If these two function is not an atomic operation, below is an example of
> problem:
>
> <Status disconnected>
> 1. Thread A call mtk_hdmi_audio_hook_plugged_cb()
> 2. Thread A call mtk_cec_hpd_high() and get disconnected.
> <Status connected>
> 3. Thread B call hdmi_conn_detect()
> 4. Thread B call mtk_cec_hpd_high() and get connected
> 5. Thread B callback plugged_cb() with connected
> 6. Thread A callback plugged_cb() with disconnected (Bug here)

Another attempt: https://patchwork.kernel.org/patch/11379979/

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