Allow codec driver register callback function for plug event.
The callback registration flow:
dw-hdmi <--- hw-hdmi-i2s-audio <--- hdmi-codec
dw-hdmi-i2s-audio implements hook_plugged_cb op
so codec driver can register the callback.
dw-hdmi implements set_plugged_cb op so platform device can register the
callback.
When connector plug/unplug event happens, report this event using the
callback.
Make sure that audio and drm are using the single source of truth for
connector status.
Signed-off-by: Cheng-Yi Chiang <[email protected]>
---
.../gpu/drm/bridge/synopsys/dw-hdmi-audio.h | 3 ++
.../drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 10 ++++++
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 34 ++++++++++++++++++-
3 files changed, 46 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
index 63b5756f463b..f523c590984e 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
@@ -2,6 +2,8 @@
#ifndef DW_HDMI_AUDIO_H
#define DW_HDMI_AUDIO_H
+#include <sound/hdmi-codec.h>
+
struct dw_hdmi;
struct dw_hdmi_audio_data {
@@ -17,6 +19,7 @@ struct dw_hdmi_i2s_audio_data {
void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
u8 (*read)(struct dw_hdmi *hdmi, int offset);
+ int (*set_plugged_cb)(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn);
};
#endif
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
index 5cbb71a866d5..7b93cf05c985 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
@@ -104,10 +104,20 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
return -EINVAL;
}
+static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
+ hdmi_codec_plugged_cb fn)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ struct dw_hdmi *hdmi = audio->hdmi;
+
+ return audio->set_plugged_cb(hdmi, fn);
+}
+
static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
.hw_params = dw_hdmi_i2s_hw_params,
.audio_shutdown = dw_hdmi_i2s_audio_shutdown,
.get_dai_id = dw_hdmi_i2s_get_dai_id,
+ .hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
};
static int snd_dw_hdmi_probe(struct platform_device *pdev)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 045b1b13fd0e..c69a399fc7ca 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -26,6 +26,8 @@
#include <drm/drm_probe_helper.h>
#include <drm/bridge/dw_hdmi.h>
+#include <sound/hdmi-codec.h>
+
#include <uapi/linux/media-bus-format.h>
#include <uapi/linux/videodev2.h>
@@ -185,6 +187,9 @@ struct dw_hdmi {
void (*disable_audio)(struct dw_hdmi *hdmi);
struct cec_notifier *cec_notifier;
+
+ hdmi_codec_plugged_cb plugged_cb;
+ enum drm_connector_status last_connector_result;
};
#define HDMI_IH_PHY_STAT0_RX_SENSE \
@@ -209,6 +214,17 @@ static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
return val;
}
+static int hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn)
+{
+ mutex_lock(&hdmi->mutex);
+ hdmi->plugged_cb = fn;
+ if (hdmi->audio && !IS_ERR(hdmi->audio))
+ fn(hdmi->audio,
+ hdmi->last_connector_result == connector_status_connected);
+ mutex_unlock(&hdmi->mutex);
+ return 0;
+}
+
static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
{
regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
@@ -2044,6 +2060,7 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
{
struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
connector);
+ enum drm_connector_status result;
mutex_lock(&hdmi->mutex);
hdmi->force = DRM_FORCE_UNSPECIFIED;
@@ -2051,7 +2068,20 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
dw_hdmi_update_phy_mask(hdmi);
mutex_unlock(&hdmi->mutex);
- return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
+ result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
+
+ mutex_lock(&hdmi->mutex);
+ if (result != hdmi->last_connector_result) {
+ dev_dbg(hdmi->dev, "read_hpd result: %d", result);
+ if (hdmi->plugged_cb && hdmi->audio && !IS_ERR(hdmi->audio)) {
+ hdmi->plugged_cb(hdmi->audio,
+ result == connector_status_connected);
+ hdmi->last_connector_result = result;
+ }
+ }
+ mutex_unlock(&hdmi->mutex);
+
+ return result;
}
static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
@@ -2460,6 +2490,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
hdmi->rxsense = true;
hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
hdmi->mc_clkdis = 0x7f;
+ hdmi->last_connector_result = connector_status_disconnected;
mutex_init(&hdmi->mutex);
mutex_init(&hdmi->audio_mutex);
@@ -2653,6 +2684,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
audio.hdmi = hdmi;
audio.write = hdmi_writeb;
audio.read = hdmi_readb;
+ audio.set_plugged_cb = hdmi_set_plugged_cb;
hdmi->enable_audio = dw_hdmi_i2s_audio_enable;
hdmi->disable_audio = dw_hdmi_i2s_audio_disable;
--
2.22.0.410.gd8fdbe21b5-goog
On 2019-07-05 06:26, Cheng-Yi Chiang wrote:
> Allow codec driver register callback function for plug event.
>
> The callback registration flow:
> dw-hdmi <--- hw-hdmi-i2s-audio <--- hdmi-codec
>
> dw-hdmi-i2s-audio implements hook_plugged_cb op
> so codec driver can register the callback.
>
> dw-hdmi implements set_plugged_cb op so platform device can register the
> callback.
>
> When connector plug/unplug event happens, report this event using the
> callback.
>
> Make sure that audio and drm are using the single source of truth for
> connector status.
I have a similar notification need for making a snd_ctl_notify() call from hdmi-codec when ELD changes,
see [1] for work in progress patches (part of a dw-hdmi multi-channel lpcm series I am preparing).
Any suggestions on how to handle a ELD change notification?
Should I use a similar pattern as in this series?
(I lost track of the hdmi-notifier/drm_audio_component discussion)
[1] https://github.com/Kwiboo/linux-rockchip/compare/54b40fdd264c7ed96017271eb6524cca4ff755ab...9c17284e8a8657e8b1da53a1c7ff056cbd8ce43c
Best regards,
Jonas
>
> Signed-off-by: Cheng-Yi Chiang <[email protected]>
> ---
> .../gpu/drm/bridge/synopsys/dw-hdmi-audio.h | 3 ++
> .../drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 10 ++++++
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 34 ++++++++++++++++++-
> 3 files changed, 46 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> index 63b5756f463b..f523c590984e 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> @@ -2,6 +2,8 @@
> #ifndef DW_HDMI_AUDIO_H
> #define DW_HDMI_AUDIO_H
>
> +#include <sound/hdmi-codec.h>
> +
> struct dw_hdmi;
>
> struct dw_hdmi_audio_data {
> @@ -17,6 +19,7 @@ struct dw_hdmi_i2s_audio_data {
>
> void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
> u8 (*read)(struct dw_hdmi *hdmi, int offset);
> + int (*set_plugged_cb)(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn);
> };
>
> #endif
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> index 5cbb71a866d5..7b93cf05c985 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> @@ -104,10 +104,20 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
> return -EINVAL;
> }
>
> +static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
> + hdmi_codec_plugged_cb fn)
> +{
> + struct dw_hdmi_i2s_audio_data *audio = data;
> + struct dw_hdmi *hdmi = audio->hdmi;
> +
> + return audio->set_plugged_cb(hdmi, fn);
> +}
> +
> static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
> .hw_params = dw_hdmi_i2s_hw_params,
> .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
> .get_dai_id = dw_hdmi_i2s_get_dai_id,
> + .hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
> };
>
> static int snd_dw_hdmi_probe(struct platform_device *pdev)
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 045b1b13fd0e..c69a399fc7ca 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -26,6 +26,8 @@
> #include <drm/drm_probe_helper.h>
> #include <drm/bridge/dw_hdmi.h>
>
> +#include <sound/hdmi-codec.h>
> +
> #include <uapi/linux/media-bus-format.h>
> #include <uapi/linux/videodev2.h>
>
> @@ -185,6 +187,9 @@ struct dw_hdmi {
> void (*disable_audio)(struct dw_hdmi *hdmi);
>
> struct cec_notifier *cec_notifier;
> +
> + hdmi_codec_plugged_cb plugged_cb;
> + enum drm_connector_status last_connector_result;
> };
>
> #define HDMI_IH_PHY_STAT0_RX_SENSE \
> @@ -209,6 +214,17 @@ static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
> return val;
> }
>
> +static int hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn)
> +{
> + mutex_lock(&hdmi->mutex);
> + hdmi->plugged_cb = fn;
> + if (hdmi->audio && !IS_ERR(hdmi->audio))
> + fn(hdmi->audio,
> + hdmi->last_connector_result == connector_status_connected);
> + mutex_unlock(&hdmi->mutex);
> + return 0;
> +}
> +
> static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
> {
> regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
> @@ -2044,6 +2060,7 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> {
> struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> connector);
> + enum drm_connector_status result;
>
> mutex_lock(&hdmi->mutex);
> hdmi->force = DRM_FORCE_UNSPECIFIED;
> @@ -2051,7 +2068,20 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> dw_hdmi_update_phy_mask(hdmi);
> mutex_unlock(&hdmi->mutex);
>
> - return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> + result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> +
> + mutex_lock(&hdmi->mutex);
> + if (result != hdmi->last_connector_result) {
> + dev_dbg(hdmi->dev, "read_hpd result: %d", result);
> + if (hdmi->plugged_cb && hdmi->audio && !IS_ERR(hdmi->audio)) {
> + hdmi->plugged_cb(hdmi->audio,
> + result == connector_status_connected);
> + hdmi->last_connector_result = result;
> + }
> + }
> + mutex_unlock(&hdmi->mutex);
> +
> + return result;
> }
>
> static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
> @@ -2460,6 +2490,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
> hdmi->rxsense = true;
> hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
> hdmi->mc_clkdis = 0x7f;
> + hdmi->last_connector_result = connector_status_disconnected;
>
> mutex_init(&hdmi->mutex);
> mutex_init(&hdmi->audio_mutex);
> @@ -2653,6 +2684,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
> audio.hdmi = hdmi;
> audio.write = hdmi_writeb;
> audio.read = hdmi_readb;
> + audio.set_plugged_cb = hdmi_set_plugged_cb;
> hdmi->enable_audio = dw_hdmi_i2s_audio_enable;
> hdmi->disable_audio = dw_hdmi_i2s_audio_disable;
>
On Fri, Jul 5, 2019 at 12:26 PM Cheng-Yi Chiang <[email protected]> wrote:
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> index 63b5756f463b..f523c590984e 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> @@ -2,6 +2,8 @@
> #ifndef DW_HDMI_AUDIO_H
> #define DW_HDMI_AUDIO_H
>
> +#include <sound/hdmi-codec.h>
> +
> struct dw_hdmi;
>
> struct dw_hdmi_audio_data {
> @@ -17,6 +19,7 @@ struct dw_hdmi_i2s_audio_data {
>
> void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
> u8 (*read)(struct dw_hdmi *hdmi, int offset);
> + int (*set_plugged_cb)(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn);
> };
>
> #endif
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> index 5cbb71a866d5..7b93cf05c985 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> @@ -104,10 +104,20 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
> return -EINVAL;
> }
>
> +static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
> + hdmi_codec_plugged_cb fn)
> +{
> + struct dw_hdmi_i2s_audio_data *audio = data;
> + struct dw_hdmi *hdmi = audio->hdmi;
> +
> + return audio->set_plugged_cb(hdmi, fn);
> +}
> +
The first parameter dev could be removed. Not used.
> static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
> .hw_params = dw_hdmi_i2s_hw_params,
> .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
> .get_dai_id = dw_hdmi_i2s_get_dai_id,
> + .hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
> };
>
> static int snd_dw_hdmi_probe(struct platform_device *pdev)
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 045b1b13fd0e..c69a399fc7ca 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -26,6 +26,8 @@
> #include <drm/drm_probe_helper.h>
> #include <drm/bridge/dw_hdmi.h>
>
> +#include <sound/hdmi-codec.h>
> +
> #include <uapi/linux/media-bus-format.h>
> #include <uapi/linux/videodev2.h>
>
> @@ -185,6 +187,9 @@ struct dw_hdmi {
> void (*disable_audio)(struct dw_hdmi *hdmi);
>
> struct cec_notifier *cec_notifier;
> +
> + hdmi_codec_plugged_cb plugged_cb;
> + enum drm_connector_status last_connector_result;
> };
>
> #define HDMI_IH_PHY_STAT0_RX_SENSE \
> @@ -209,6 +214,17 @@ static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
> return val;
> }
>
> +static int hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn)
> +{
> + mutex_lock(&hdmi->mutex);
> + hdmi->plugged_cb = fn;
> + if (hdmi->audio && !IS_ERR(hdmi->audio))
I would expect if IS_ERR(hdmi->audio), then this should not be called
(i.e. should exit somewhere earlier).
> + fn(hdmi->audio,
> + hdmi->last_connector_result == connector_status_connected);
> + mutex_unlock(&hdmi->mutex);
> + return 0;
> +}
> +
> static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
> {
> regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
> @@ -2044,6 +2060,7 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> {
> struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> connector);
> + enum drm_connector_status result;
>
> mutex_lock(&hdmi->mutex);
> hdmi->force = DRM_FORCE_UNSPECIFIED;
> @@ -2051,7 +2068,20 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> dw_hdmi_update_phy_mask(hdmi);
> mutex_unlock(&hdmi->mutex);
>
> - return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> + result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> +
> + mutex_lock(&hdmi->mutex);
> + if (result != hdmi->last_connector_result) {
> + dev_dbg(hdmi->dev, "read_hpd result: %d", result);
> + if (hdmi->plugged_cb && hdmi->audio && !IS_ERR(hdmi->audio)) {
Share the same concern above.
On Fri, Jul 5, 2019 at 1:45 PM Jonas Karlman <[email protected]> wrote:
>
> On 2019-07-05 06:26, Cheng-Yi Chiang wrote:
> > Allow codec driver register callback function for plug event.
> >
> > The callback registration flow:
> > dw-hdmi <--- hw-hdmi-i2s-audio <--- hdmi-codec
> >
> > dw-hdmi-i2s-audio implements hook_plugged_cb op
> > so codec driver can register the callback.
> >
> > dw-hdmi implements set_plugged_cb op so platform device can register the
> > callback.
> >
> > When connector plug/unplug event happens, report this event using the
> > callback.
> >
> > Make sure that audio and drm are using the single source of truth for
> > connector status.
>
> I have a similar notification need for making a snd_ctl_notify() call from hdmi-codec when ELD changes,
> see [1] for work in progress patches (part of a dw-hdmi multi-channel lpcm series I am preparing).
>
> Any suggestions on how to handle a ELD change notification?
> Should I use a similar pattern as in this series?
Hi Jonas, I think we are using a very similar pattern.
The difference is that in my series the function is not exposed on hdmi-codec.h.
I think your method makes sense for your case because
dw-hdmi-i2s-audio.c needs to access and update data inside
dw_hdmi_i2s_audio_data,
while in my use case it is only a thin layer setting up the callback
for jack status.
> (I lost track of the hdmi-notifier/drm_audio_component discussion)
>
It was a long discussion.
I think the conclusion was that if we are only talking about
hdmi-codec, then we just need to extend the ops exposed in hdmi-codec
and don't need to use
hdmi-notifier or drm_audio_component.
> [1] https://github.com/Kwiboo/linux-rockchip/compare/54b40fdd264c7ed96017271eb6524cca4ff755ab...9c17284e8a8657e8b1da53a1c7ff056cbd8ce43c
>
> Best regards,
> Jonas
>
> >
> > Signed-off-by: Cheng-Yi Chiang <[email protected]>
> > ---
> > .../gpu/drm/bridge/synopsys/dw-hdmi-audio.h | 3 ++
> > .../drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 10 ++++++
> > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 34 ++++++++++++++++++-
> > 3 files changed, 46 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> > index 63b5756f463b..f523c590984e 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> > @@ -2,6 +2,8 @@
> > #ifndef DW_HDMI_AUDIO_H
> > #define DW_HDMI_AUDIO_H
> >
> > +#include <sound/hdmi-codec.h>
> > +
> > struct dw_hdmi;
> >
> > struct dw_hdmi_audio_data {
> > @@ -17,6 +19,7 @@ struct dw_hdmi_i2s_audio_data {
> >
> > void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
> > u8 (*read)(struct dw_hdmi *hdmi, int offset);
> > + int (*set_plugged_cb)(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn);
> > };
> >
> > #endif
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> > index 5cbb71a866d5..7b93cf05c985 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> > @@ -104,10 +104,20 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
> > return -EINVAL;
> > }
> >
> > +static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
> > + hdmi_codec_plugged_cb fn)
> > +{
> > + struct dw_hdmi_i2s_audio_data *audio = data;
> > + struct dw_hdmi *hdmi = audio->hdmi;
> > +
> > + return audio->set_plugged_cb(hdmi, fn);
> > +}
> > +
> > static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
> > .hw_params = dw_hdmi_i2s_hw_params,
> > .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
> > .get_dai_id = dw_hdmi_i2s_get_dai_id,
> > + .hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
> > };
> >
> > static int snd_dw_hdmi_probe(struct platform_device *pdev)
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > index 045b1b13fd0e..c69a399fc7ca 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > @@ -26,6 +26,8 @@
> > #include <drm/drm_probe_helper.h>
> > #include <drm/bridge/dw_hdmi.h>
> >
> > +#include <sound/hdmi-codec.h>
> > +
> > #include <uapi/linux/media-bus-format.h>
> > #include <uapi/linux/videodev2.h>
> >
> > @@ -185,6 +187,9 @@ struct dw_hdmi {
> > void (*disable_audio)(struct dw_hdmi *hdmi);
> >
> > struct cec_notifier *cec_notifier;
> > +
> > + hdmi_codec_plugged_cb plugged_cb;
> > + enum drm_connector_status last_connector_result;
> > };
> >
> > #define HDMI_IH_PHY_STAT0_RX_SENSE \
> > @@ -209,6 +214,17 @@ static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
> > return val;
> > }
> >
> > +static int hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn)
> > +{
> > + mutex_lock(&hdmi->mutex);
> > + hdmi->plugged_cb = fn;
> > + if (hdmi->audio && !IS_ERR(hdmi->audio))
> > + fn(hdmi->audio,
> > + hdmi->last_connector_result == connector_status_connected);
> > + mutex_unlock(&hdmi->mutex);
> > + return 0;
> > +}
> > +
> > static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
> > {
> > regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
> > @@ -2044,6 +2060,7 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> > {
> > struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> > connector);
> > + enum drm_connector_status result;
> >
> > mutex_lock(&hdmi->mutex);
> > hdmi->force = DRM_FORCE_UNSPECIFIED;
> > @@ -2051,7 +2068,20 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> > dw_hdmi_update_phy_mask(hdmi);
> > mutex_unlock(&hdmi->mutex);
> >
> > - return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> > + result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> > +
> > + mutex_lock(&hdmi->mutex);
> > + if (result != hdmi->last_connector_result) {
> > + dev_dbg(hdmi->dev, "read_hpd result: %d", result);
> > + if (hdmi->plugged_cb && hdmi->audio && !IS_ERR(hdmi->audio)) {
> > + hdmi->plugged_cb(hdmi->audio,
> > + result == connector_status_connected);
> > + hdmi->last_connector_result = result;
> > + }
> > + }
> > + mutex_unlock(&hdmi->mutex);
> > +
> > + return result;
> > }
> >
> > static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
> > @@ -2460,6 +2490,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
> > hdmi->rxsense = true;
> > hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
> > hdmi->mc_clkdis = 0x7f;
> > + hdmi->last_connector_result = connector_status_disconnected;
> >
> > mutex_init(&hdmi->mutex);
> > mutex_init(&hdmi->audio_mutex);
> > @@ -2653,6 +2684,7 @@ __dw_hdmi_probe(struct platform_device *pdev,
> > audio.hdmi = hdmi;
> > audio.write = hdmi_writeb;
> > audio.read = hdmi_readb;
> > + audio.set_plugged_cb = hdmi_set_plugged_cb;
> > hdmi->enable_audio = dw_hdmi_i2s_audio_enable;
> > hdmi->disable_audio = dw_hdmi_i2s_audio_disable;
> >
>
On Fri, Jul 5, 2019 at 3:09 PM Tzung-Bi Shih <[email protected]> wrote:
>
> On Fri, Jul 5, 2019 at 12:26 PM Cheng-Yi Chiang <[email protected]> wrote:
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> > index 63b5756f463b..f523c590984e 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
> > @@ -2,6 +2,8 @@
> > #ifndef DW_HDMI_AUDIO_H
> > #define DW_HDMI_AUDIO_H
> >
> > +#include <sound/hdmi-codec.h>
> > +
> > struct dw_hdmi;
> >
> > struct dw_hdmi_audio_data {
> > @@ -17,6 +19,7 @@ struct dw_hdmi_i2s_audio_data {
> >
> > void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
> > u8 (*read)(struct dw_hdmi *hdmi, int offset);
> > + int (*set_plugged_cb)(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn);
> > };
> >
> > #endif
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> > index 5cbb71a866d5..7b93cf05c985 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> > @@ -104,10 +104,20 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
> > return -EINVAL;
> > }
> >
> > +static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
> > + hdmi_codec_plugged_cb fn)
> > +{
> > + struct dw_hdmi_i2s_audio_data *audio = data;
> > + struct dw_hdmi *hdmi = audio->hdmi;
> > +
> > + return audio->set_plugged_cb(hdmi, fn);
> > +}
> > +
> The first parameter dev could be removed. Not used.
>
Hi Tzungbi, thanks for the review.
I am not sure about this one.
I think it depends on the DRM driver so I need to keep both..
E.g.
drivers/gpu/drm/rockchip/cdn-dp-core.c
it needs dev to access the required data.
You can check this patch:
"efc9194bcff8 ASoC: hdmi-codec: callback function will be called with
private data"
It explains that some cases use *dev, some cases use *data.
> > static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
> > .hw_params = dw_hdmi_i2s_hw_params,
> > .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
> > .get_dai_id = dw_hdmi_i2s_get_dai_id,
> > + .hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
> > };
> >
> > static int snd_dw_hdmi_probe(struct platform_device *pdev)
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > index 045b1b13fd0e..c69a399fc7ca 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > @@ -26,6 +26,8 @@
> > #include <drm/drm_probe_helper.h>
> > #include <drm/bridge/dw_hdmi.h>
> >
> > +#include <sound/hdmi-codec.h>
> > +
> > #include <uapi/linux/media-bus-format.h>
> > #include <uapi/linux/videodev2.h>
> >
> > @@ -185,6 +187,9 @@ struct dw_hdmi {
> > void (*disable_audio)(struct dw_hdmi *hdmi);
> >
> > struct cec_notifier *cec_notifier;
> > +
> > + hdmi_codec_plugged_cb plugged_cb;
> > + enum drm_connector_status last_connector_result;
> > };
> >
> > #define HDMI_IH_PHY_STAT0_RX_SENSE \
> > @@ -209,6 +214,17 @@ static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
> > return val;
> > }
> >
> > +static int hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn)
> > +{
> > + mutex_lock(&hdmi->mutex);
> > + hdmi->plugged_cb = fn;
> > + if (hdmi->audio && !IS_ERR(hdmi->audio))
> I would expect if IS_ERR(hdmi->audio), then this should not be called
> (i.e. should exit somewhere earlier).
>
ACK. I should fix that.
Thanks!
> > + fn(hdmi->audio,
> > + hdmi->last_connector_result == connector_status_connected);
> > + mutex_unlock(&hdmi->mutex);
> > + return 0;
> > +}
> > +
> > static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
> > {
> > regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
> > @@ -2044,6 +2060,7 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> > {
> > struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> > connector);
> > + enum drm_connector_status result;
> >
> > mutex_lock(&hdmi->mutex);
> > hdmi->force = DRM_FORCE_UNSPECIFIED;
> > @@ -2051,7 +2068,20 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
> > dw_hdmi_update_phy_mask(hdmi);
> > mutex_unlock(&hdmi->mutex);
> >
> > - return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> > + result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> > +
> > + mutex_lock(&hdmi->mutex);
> > + if (result != hdmi->last_connector_result) {
> > + dev_dbg(hdmi->dev, "read_hpd result: %d", result);
> > + if (hdmi->plugged_cb && hdmi->audio && !IS_ERR(hdmi->audio)) {
> Share the same concern above.
ACK
On Fri, Jul 05, 2019 at 03:31:24PM +0800, Cheng-yi Chiang wrote:
> It was a long discussion.
> I think the conclusion was that if we are only talking about
> hdmi-codec, then we just need to extend the ops exposed in hdmi-codec
> and don't need to use
> hdmi-notifier or drm_audio_component.
What I'd picked up from the bits of that discussion that I
followed was that there was some desire to come up with a unified
approach to ELD notification rather than having to go through
this discussion repeatedly? That would certianly seem more
sensible. Admittedly it was a long thread with lots of enormous
mails so I didn't follow the whole thing.
On Sat, Jul 6, 2019 at 1:16 AM Mark Brown <[email protected]> wrote:
>
> On Fri, Jul 05, 2019 at 03:31:24PM +0800, Cheng-yi Chiang wrote:
>
> > It was a long discussion.
> > I think the conclusion was that if we are only talking about
> > hdmi-codec, then we just need to extend the ops exposed in hdmi-codec
> > and don't need to use
> > hdmi-notifier or drm_audio_component.
>
> What I'd picked up from the bits of that discussion that I
> followed was that there was some desire to come up with a unified
> approach to ELD notification rather than having to go through
> this discussion repeatedly? That would certianly seem more
> sensible. Admittedly it was a long thread with lots of enormous
> mails so I didn't follow the whole thing.
Hi Mark, thanks for following the long thread.
The end of the discussion was at
https://lkml.org/lkml/2019/6/20/1397
Quoted from Daniel's suggestion:
"
I need to think about this more, but if all we need to look at is
hdmi_codec, then I think this becomes a lot easier. And we can ignore
drm_audio_component.h completely.
"
My thought is that the codec driver under ASoC are only these two:
hdac_hdmi.c and hdmi-codec.c ( forgive me if I missed others. I just
grep "hdmi" under sound/soc/codecs/ )
hdac_hdmi.c is like a wrapper for HDA and drm_audio_components.
hdmi-codec.c is the only other codec driver that cares HDMI under ASoC.
So adding the jack/eld support at hdmi-codec driver can cover the
existing use cases for HDMI codec driver in ASoC.
That said, adding a new unified approach for Jack/ELD notification
that will only be used by hdmi-codec seems not a high priority.
Hope this explanation helps your decision.
Thanks!