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Subject: Re: [Intel-gfx] [PATCH v6 2/6] drm/i915: hdmi: add CEC notifier to
 intel_hdmi
To:     Rodrigo Vivi <rodrigo.vivi@intel.com>,
        =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= <ville.syrjala@linux.intel.com>
Cc:     felixe@google.com, seanpaul@google.com, airlied@linux.ie,
        sadolfsson@google.com, intel-gfx@lists.freedesktop.org,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        fparent@baylibre.com, hans.verkuil@cisco.com, bleung@google.com,
        darekm@google.com, lee.jones@linaro.org,
        linux-media@vger.kernel.org
References: <1527155841-28494-1-git-send-email-narmstrong@baylibre.com>
 <1527155841-28494-3-git-send-email-narmstrong@baylibre.com>
 <20180530152936.GQ23723@intel.com> <20180530232605.GM2115@intel.com>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Message-ID: <3049784b-9422-3608-fba2-86b6c9ad1fbe@baylibre.com>
Date:   Thu, 31 May 2018 15:21:42 +0200
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On 31/05/2018 01:26, Rodrigo Vivi wrote:
> On Wed, May 30, 2018 at 06:29:36PM +0300, Ville Syrjälä wrote:
>> On Thu, May 24, 2018 at 11:57:17AM +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>
>>> Reviewed-by: Hans Verkuil <hans.verkuil@cisco.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>";
>>> +	}
>>> +}
>>
>> Could use a comment to make it clear that this identifier is
>> expected to remain stable since it's referenced from other drivers.
>>
>>> +
>>>  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;
>>
>> "notifier" seems a bit too generic a name. "cec_notifier" would be
>> better.
>>
>> Apart from that this seems OK to me
>> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> It seems that you will need to push this to other trees right?
> Feel free to use:
> 
> Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

You are right, it will useful, thanks !

Neil

> 
>>
>>>  };
>>>  
>>>  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
>>>
>>> _______________________________________________
>>> Intel-gfx mailing list
>>> Intel-gfx@lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>
>> -- 
>> Ville Syrjälä
>> Intel
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel