diff mbox

[v2,2/5] drm/i915: hdmi: add CEC notifier to intel_hdmi

Message ID 1526648704-16873-3-git-send-email-narmstrong@baylibre.com (mailing list archive)
State New, archived
Headers show

Commit Message

Neil Armstrong May 18, 2018, 1:05 p.m. UTC 
This patchs adds the cec_notifier feature to the intel_hdmi part
of the i915 DRM driver. It uses the HDMI DRM connector name to differentiate
between each HDMI ports.
The changes will allow the i915 HDMI code to notify EDID and HPD changes
to an eventual CEC adapter.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/gpu/drm/i915/Kconfig         |  1 +
 drivers/gpu/drm/i915/intel_display.h | 20 ++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |  2 ++
 drivers/gpu/drm/i915/intel_hdmi.c    | 13 +++++++++++++
 4 files changed, 36 insertions(+)

Comments

Ville Syrjälä May 18, 2018, 1:24 p.m. UTC | #1 
On Fri, May 18, 2018 at 03:05:01PM +0200, Neil Armstrong wrote:
> This patchs adds the cec_notifier feature to the intel_hdmi part
> of the i915 DRM driver. It uses the HDMI DRM connector name to differentiate
> between each HDMI ports.
> The changes will allow the i915 HDMI code to notify EDID and HPD changes
> to an eventual CEC adapter.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  drivers/gpu/drm/i915/Kconfig         |  1 +
>  drivers/gpu/drm/i915/intel_display.h | 20 ++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h     |  2 ++
>  drivers/gpu/drm/i915/intel_hdmi.c    | 13 +++++++++++++
>  4 files changed, 36 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
> index dfd9588..2d65d56 100644
> --- a/drivers/gpu/drm/i915/Kconfig
> +++ b/drivers/gpu/drm/i915/Kconfig
> @@ -23,6 +23,7 @@ config DRM_I915
>  	select SYNC_FILE
>  	select IOSF_MBI
>  	select CRC32
> +	select CEC_CORE if CEC_NOTIFIER
>  	help
>  	  Choose this option if you have a system that has "Intel Graphics
>  	  Media Accelerator" or "HD Graphics" integrated graphics,
> diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
> index 4e7418b..c68d1c8 100644
> --- a/drivers/gpu/drm/i915/intel_display.h
> +++ b/drivers/gpu/drm/i915/intel_display.h
> @@ -126,6 +126,26 @@ enum port {
>  
>  #define port_name(p) ((p) + 'A')
>  
> +static inline const char *port_identifier(enum port port)
> +{
> +	switch (port) {
> +	case PORT_A:
> +		return "Port A";
> +	case PORT_B:
> +		return "Port B";
> +	case PORT_C:
> +		return "Port C";
> +	case PORT_D:
> +		return "Port D";
> +	case PORT_E:
> +		return "Port E";
> +	case PORT_F:
> +		return "Port F";
> +	default:
> +		return "<invalid>";
> +	}
> +}

I don't think we need this in the header. A static function will do.

And I was actually thinking something a bit fancier like:
snprintf("%s/port-%s", dev_name(dev), port_id(port));

Oh, I see you already pass the device in so I guess we don't need
that in the port id?

> +
>  enum dpio_channel {
>  	DPIO_CH0,
>  	DPIO_CH1
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index d436858..b50e51b 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -39,6 +39,7 @@
>  #include <drm/drm_dp_mst_helper.h>
>  #include <drm/drm_rect.h>
>  #include <drm/drm_atomic.h>
> +#include <media/cec-notifier.h>
>  
>  /**
>   * __wait_for - magic wait macro
> @@ -1001,6 +1002,7 @@ struct intel_hdmi {
>  	bool has_audio;
>  	bool rgb_quant_range_selectable;
>  	struct intel_connector *attached_connector;
> +	struct cec_notifier *notifier;

I was wondering if we need any ifdefs around this stuff, but I guess not
since it's just a pointer and all the functions seem to have empty
static inlines for the CEC=n case.

>  };
>  
>  struct intel_dp_mst_encoder;
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 1baef4a..d522b5b 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1868,6 +1868,8 @@ intel_hdmi_set_edid(struct drm_connector *connector)
>  		connected = true;
>  	}
>  
> +	cec_notifier_set_phys_addr_from_edid(intel_hdmi->notifier, edid);
> +
>  	return connected;
>  }
>  
> @@ -1876,6 +1878,7 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
>  {
>  	enum drm_connector_status status;
>  	struct drm_i915_private *dev_priv = to_i915(connector->dev);
> +	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
>  
>  	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
>  		      connector->base.id, connector->name);
> @@ -1891,6 +1894,9 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
>  
>  	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
>  
> +	if (status != connector_status_connected)
> +		cec_notifier_phys_addr_invalidate(intel_hdmi->notifier);
> +
>  	return status;
>  }
>  
> @@ -2031,6 +2037,8 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
>  
>  static void intel_hdmi_destroy(struct drm_connector *connector)
>  {
> +	if (intel_attached_hdmi(connector)->notifier)
> +		cec_notifier_put(intel_attached_hdmi(connector)->notifier);
>  	kfree(to_intel_connector(connector)->detect_edid);
>  	drm_connector_cleanup(connector);
>  	kfree(connector);
> @@ -2358,6 +2366,11 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
>  		u32 temp = I915_READ(PEG_BAND_GAP_DATA);
>  		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
>  	}
> +
> +	intel_hdmi->notifier = cec_notifier_get_conn(dev->dev,
> +						     port_identifier(port));
> +	if (!intel_hdmi->notifier)
> +		DRM_DEBUG_KMS("CEC notifier get failed\n");
>  }
>  
>  void intel_hdmi_init(struct drm_i915_private *dev_priv,
> -- 
> 2.7.4
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
Neil Armstrong May 21, 2018, 8:54 a.m. UTC | #2 
Hi Ville,

On 18/05/2018 15:24, Ville Syrjälä wrote:
> On Fri, May 18, 2018 at 03:05:01PM +0200, Neil Armstrong wrote:
>> This patchs adds the cec_notifier feature to the intel_hdmi part
>> of the i915 DRM driver. It uses the HDMI DRM connector name to differentiate
>> between each HDMI ports.
>> The changes will allow the i915 HDMI code to notify EDID and HPD changes
>> to an eventual CEC adapter.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>> ---
>>  drivers/gpu/drm/i915/Kconfig         |  1 +
>>  drivers/gpu/drm/i915/intel_display.h | 20 ++++++++++++++++++++
>>  drivers/gpu/drm/i915/intel_drv.h     |  2 ++
>>  drivers/gpu/drm/i915/intel_hdmi.c    | 13 +++++++++++++
>>  4 files changed, 36 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
>> index dfd9588..2d65d56 100644
>> --- a/drivers/gpu/drm/i915/Kconfig
>> +++ b/drivers/gpu/drm/i915/Kconfig
>> @@ -23,6 +23,7 @@ config DRM_I915
>>  	select SYNC_FILE
>>  	select IOSF_MBI
>>  	select CRC32
>> +	select CEC_CORE if CEC_NOTIFIER
>>  	help
>>  	  Choose this option if you have a system that has "Intel Graphics
>>  	  Media Accelerator" or "HD Graphics" integrated graphics,
>> diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
>> index 4e7418b..c68d1c8 100644
>> --- a/drivers/gpu/drm/i915/intel_display.h
>> +++ b/drivers/gpu/drm/i915/intel_display.h
>> @@ -126,6 +126,26 @@ enum port {
>>  
>>  #define port_name(p) ((p) + 'A')
>>  
>> +static inline const char *port_identifier(enum port port)
>> +{
>> +	switch (port) {
>> +	case PORT_A:
>> +		return "Port A";
>> +	case PORT_B:
>> +		return "Port B";
>> +	case PORT_C:
>> +		return "Port C";
>> +	case PORT_D:
>> +		return "Port D";
>> +	case PORT_E:
>> +		return "Port E";
>> +	case PORT_F:
>> +		return "Port F";
>> +	default:
>> +		return "<invalid>";
>> +	}
>> +}
> 
> I don't think we need this in the header. A static function will do.

I just followed how other functions were declared, in the same way.

> And I was actually thinking something a bit fancier like:
> snprintf("%s/port-%s", dev_name(dev), port_id(port));
> 
> Oh, I see you already pass the device in so I guess we don't need
> that in the port id?

Indeed, my bad I forgot to answer your last question, we already pass a struct
device which provides the device bus, name and id, so it's unneeded here.

> 
>> +
>>  enum dpio_channel {
>>  	DPIO_CH0,
>>  	DPIO_CH1
>> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
>> index d436858..b50e51b 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -39,6 +39,7 @@
>>  #include <drm/drm_dp_mst_helper.h>
>>  #include <drm/drm_rect.h>
>>  #include <drm/drm_atomic.h>
>> +#include <media/cec-notifier.h>
>>  
>>  /**
>>   * __wait_for - magic wait macro
>> @@ -1001,6 +1002,7 @@ struct intel_hdmi {
>>  	bool has_audio;
>>  	bool rgb_quant_range_selectable;
>>  	struct intel_connector *attached_connector;
>> +	struct cec_notifier *notifier;
> 
> I was wondering if we need any ifdefs around this stuff, but I guess not
> since it's just a pointer and all the functions seem to have empty
> static inlines for the CEC=n case.
> 
>>  };
>>  
>>  struct intel_dp_mst_encoder;
>> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
>> index 1baef4a..d522b5b 100644
>> --- a/drivers/gpu/drm/i915/intel_hdmi.c
>> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
>> @@ -1868,6 +1868,8 @@ intel_hdmi_set_edid(struct drm_connector *connector)
>>  		connected = true;
>>  	}
>>  
>> +	cec_notifier_set_phys_addr_from_edid(intel_hdmi->notifier, edid);
>> +
>>  	return connected;
>>  }
>>  
>> @@ -1876,6 +1878,7 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
>>  {
>>  	enum drm_connector_status status;
>>  	struct drm_i915_private *dev_priv = to_i915(connector->dev);
>> +	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
>>  
>>  	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
>>  		      connector->base.id, connector->name);
>> @@ -1891,6 +1894,9 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
>>  
>>  	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
>>  
>> +	if (status != connector_status_connected)
>> +		cec_notifier_phys_addr_invalidate(intel_hdmi->notifier);
>> +
>>  	return status;
>>  }
>>  
>> @@ -2031,6 +2037,8 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
>>  
>>  static void intel_hdmi_destroy(struct drm_connector *connector)
>>  {
>> +	if (intel_attached_hdmi(connector)->notifier)
>> +		cec_notifier_put(intel_attached_hdmi(connector)->notifier);
>>  	kfree(to_intel_connector(connector)->detect_edid);
>>  	drm_connector_cleanup(connector);
>>  	kfree(connector);
>> @@ -2358,6 +2366,11 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
>>  		u32 temp = I915_READ(PEG_BAND_GAP_DATA);
>>  		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
>>  	}
>> +
>> +	intel_hdmi->notifier = cec_notifier_get_conn(dev->dev,
>> +						     port_identifier(port));
>> +	if (!intel_hdmi->notifier)
>> +		DRM_DEBUG_KMS("CEC notifier get failed\n");
>>  }
>>  
>>  void intel_hdmi_init(struct drm_i915_private *dev_priv,
>> -- 
>> 2.7.4
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

Thans,
Neil
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index dfd9588..2d65d56 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -23,6 +23,7 @@  config DRM_I915
 	select SYNC_FILE
 	select IOSF_MBI
 	select CRC32
+	select CEC_CORE if CEC_NOTIFIER
 	help
 	  Choose this option if you have a system that has "Intel Graphics
 	  Media Accelerator" or "HD Graphics" integrated graphics,
diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
index 4e7418b..c68d1c8 100644
--- a/drivers/gpu/drm/i915/intel_display.h
+++ b/drivers/gpu/drm/i915/intel_display.h
@@ -126,6 +126,26 @@  enum port {
 
 #define port_name(p) ((p) + 'A')
 
+static inline const char *port_identifier(enum port port)
+{
+	switch (port) {
+	case PORT_A:
+		return "Port A";
+	case PORT_B:
+		return "Port B";
+	case PORT_C:
+		return "Port C";
+	case PORT_D:
+		return "Port D";
+	case PORT_E:
+		return "Port E";
+	case PORT_F:
+		return "Port F";
+	default:
+		return "<invalid>";
+	}
+}
+
 enum dpio_channel {
 	DPIO_CH0,
 	DPIO_CH1
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d436858..b50e51b 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -39,6 +39,7 @@ 
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_rect.h>
 #include <drm/drm_atomic.h>
+#include <media/cec-notifier.h>
 
 /**
  * __wait_for - magic wait macro
@@ -1001,6 +1002,7 @@  struct intel_hdmi {
 	bool has_audio;
 	bool rgb_quant_range_selectable;
 	struct intel_connector *attached_connector;
+	struct cec_notifier *notifier;
 };
 
 struct intel_dp_mst_encoder;
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1baef4a..d522b5b 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1868,6 +1868,8 @@  intel_hdmi_set_edid(struct drm_connector *connector)
 		connected = true;
 	}
 
+	cec_notifier_set_phys_addr_from_edid(intel_hdmi->notifier, edid);
+
 	return connected;
 }
 
@@ -1876,6 +1878,7 @@  intel_hdmi_detect(struct drm_connector *connector, bool force)
 {
 	enum drm_connector_status status;
 	struct drm_i915_private *dev_priv = to_i915(connector->dev);
+	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 
 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
 		      connector->base.id, connector->name);
@@ -1891,6 +1894,9 @@  intel_hdmi_detect(struct drm_connector *connector, bool force)
 
 	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
 
+	if (status != connector_status_connected)
+		cec_notifier_phys_addr_invalidate(intel_hdmi->notifier);
+
 	return status;
 }
 
@@ -2031,6 +2037,8 @@  static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
 
 static void intel_hdmi_destroy(struct drm_connector *connector)
 {
+	if (intel_attached_hdmi(connector)->notifier)
+		cec_notifier_put(intel_attached_hdmi(connector)->notifier);
 	kfree(to_intel_connector(connector)->detect_edid);
 	drm_connector_cleanup(connector);
 	kfree(connector);
@@ -2358,6 +2366,11 @@  void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 		u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 	}
+
+	intel_hdmi->notifier = cec_notifier_get_conn(dev->dev,
+						     port_identifier(port));
+	if (!intel_hdmi->notifier)
+		DRM_DEBUG_KMS("CEC notifier get failed\n");
 }
 
 void intel_hdmi_init(struct drm_i915_private *dev_priv,