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Subject: Re: [PATCH 2/5] drm/i915: hdmi: add CEC notifier to intel_hdmi
To:     Hans Verkuil <hansverk@cisco.com>, airlied@linux.ie,
        hans.verkuil@cisco.com, lee.jones@linaro.org, olof@lixom.net,
        seanpaul@google.com
Cc:     sadolfsson@google.com, felixe@google.com, bleung@google.com,
        darekm@google.com, marcheu@chromium.org, fparent@baylibre.com,
        dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org,
        intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org
References: <1526388421-18808-1-git-send-email-narmstrong@baylibre.com>
 <1526388421-18808-3-git-send-email-narmstrong@baylibre.com>
 <b27858bd-6a87-220a-cbec-586350377175@cisco.com>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Organization: Baylibre
Message-ID: <b265fbaf-ffa2-0026-db71-11f238f12a0c@baylibre.com>
Date:   Tue, 15 May 2018 16:07:50 +0200
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Hi,

On 15/05/2018 14:56, Hans Verkuil wrote:
> On 05/15/18 14:46, 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.
> 
> You haven't figured yet out where to place the cec_notifier_put() call?
> Or did you forget?

I just figured it out, I was busy on the CEC driver and notifier, will re-spin a v2 with this and the other small fixes you requested.

Thanks,
Neil

> 
> Regards,
> 
> 	Hans
> 
>>
>> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>> ---
>>  drivers/gpu/drm/i915/Kconfig      |  1 +
>>  drivers/gpu/drm/i915/intel_drv.h  |  2 ++
>>  drivers/gpu/drm/i915/intel_hdmi.c | 10 ++++++++++
>>  3 files changed, 13 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_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..9b94d72 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;
>>  }
>>  
>> @@ -2358,6 +2364,10 @@ 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, connector->name);
>> +	if (!intel_hdmi->notifier)
>> +		DRM_DEBUG_KMS("CEC notifier get failed\n");
>>  }
>>  
>>  void intel_hdmi_init(struct drm_i915_private *dev_priv,
>>
>