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SubjectRe: [RFC PATCH 3/5] drm/i915: hdmi: add CEC notifier to intel_hdmi
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On 15/05/2018 08:29, Hans Verkuil wrote:
> On 05/15/2018 12:40 AM, 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/intel_drv.h | 2 ++
>> drivers/gpu/drm/i915/intel_hdmi.c | 10 ++++++++++
>> 2 files changed, 12 insertions(+)
>>
>> 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");
>
> You 'get' the notifier here, but where is the cec_notifier_put when the connector is deleted?

Because I failed to find a safe place for this !

I will have a second look...

>
> Regards,
>
> Hans
>
>> }
>>
>> void intel_hdmi_init(struct drm_i915_private *dev_priv,
>>
>

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