On Sun, Jan 26, 2025 at 03:29:06PM +0200, Dmitry Baryshkov wrote:
> As a preparation to adding HDMI CEC helper code, add CEC-related fields
> to the struct drm_connector. Include both cec_adapter and cec_notifier,
> allowing drivers to select which one to use. The unregister callback
> is provided to let drivers unregister CEC-related data in a generic way
> without polluting drm_connector.c with dependencies on the CEC
> functions.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
> ---
> drivers/gpu/drm/drm_connector.c | 13 ++++++++++++
> include/drm/drm_connector.h | 44
> +++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 57 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index
> 1383fa9fff9bcf31488453e209a36c6fe97be2f1..fffb718b09eaaac200e6abc7524bbfe98c4741f4
> 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -279,6 +279,7 @@ static int drm_connector_init_only(struct drm_device *dev,
> INIT_LIST_HEAD(&connector->probed_modes);
> INIT_LIST_HEAD(&connector->modes);
> mutex_init(&connector->mutex);
> + mutex_init(&connector->cec.mutex);
> mutex_init(&connector->eld_mutex);
> mutex_init(&connector->edid_override_mutex);
> mutex_init(&connector->hdmi.infoframes.lock);
> @@ -698,6 +699,16 @@ static void drm_mode_remove(struct drm_connector
> *connector,
> drm_mode_destroy(connector->dev, mode);
> }
>
> +static void drm_connector_cec_unregister(struct drm_connector *connector)
> +{
> + mutex_lock(&connector->cec.mutex);
> +
> + if (connector->cec.funcs->unregister)
> + connector->cec.funcs->unregister(connector);
> +
> + mutex_unlock(&connector->cec.mutex);
> +}
> +
> /**
> * drm_connector_cleanup - cleans up an initialised connector
> * @connector: connector to cleanup
> @@ -718,6 +729,8 @@ void drm_connector_cleanup(struct drm_connector
> *connector)
>
> platform_device_unregister(connector->hdmi_audio.codec_pdev);
>
> + drm_connector_cec_unregister(connector);
> +
This should either be in a separate patch, or mentioned in the commit title/log
> if (connector->privacy_screen) {
> drm_privacy_screen_put(connector->privacy_screen);
> connector->privacy_screen = NULL;
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index
> f13d597370a30dc1b14c630ee00145256052ba56..6da840673b1209c84bbc396643c6033679a7ec74
> 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -46,6 +46,7 @@ struct drm_property_blob;
> struct drm_printer;
> struct drm_privacy_screen;
> struct drm_edid;
> +struct cec_adapter;
> struct edid;
> struct hdmi_codec_daifmt;
> struct hdmi_codec_params;
> @@ -1191,6 +1192,19 @@ struct drm_connector_hdmi_audio_funcs {
> bool enable, int direction);
> };
>
> +/**
> + * struct drm_connector_cec_funcs - drm_hdmi_connector control functions
> + */
> +struct drm_connector_cec_funcs {
> + /**
> + * @adap_unregister: unregister CEC adapter / notifier.
> + *
> + * The callback to unregister CEC adapter or notifier, so that the core
> + * DRM layer doesn't depend on the CEC_CORE.
> + */
> + void (*unregister)(struct drm_connector *connector);
> +};
> +
> /**
> * struct drm_connector_hdmi_funcs - drm_hdmi_connector control functions
> */
> @@ -1832,6 +1846,31 @@ struct drm_connector_hdmi {
> } infoframes;
> };
>
> +/**
> + * struct drm_connector_cec - DRM Connector CEC-related structure
> + */
> +struct drm_connector_cec {
> + /**
> + * @mutex: protects all CEC-related fields
> + */
All fields? Which fields require to be protected by a specific mutex
here?
Maxime
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