linux-kernel - Re: [PATCH v5 06/11] drm/display: add CEC helpers code

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Message-ID: <87plgtvqla.fsf@intel.com>
Date: Wed, 30 Apr 2025 14:25:21 +0300
From: Jani Nikula <jani.nikula@...ux.intel.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Dave Stevenson
 <dave.stevenson@...pberrypi.com>, Maíra Canal
 <mcanal@...lia.com>,
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>, Andrzej
 Hajda <andrzej.hajda@...el.com>, Neil Armstrong
 <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, Laurent
 Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman
 <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, Dmitry
 Baryshkov <lumag@...nel.org>
Subject: Re: [PATCH v5 06/11] drm/display: add CEC helpers code

On Mon, 07 Apr 2025, Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com> wrote:
> diff --git a/include/drm/display/drm_hdmi_cec_helper.h b/include/drm/display/drm_hdmi_cec_helper.h
> new file mode 100644
> index 0000000000000000000000000000000000000000..39bb6d12acb35f539a4a6cd1b61ce97bf4e063ab
> --- /dev/null
> +++ b/include/drm/display/drm_hdmi_cec_helper.h
> @@ -0,0 +1,74 @@
> +/* SPDX-License-Identifier: MIT */
> +
> +#ifndef DRM_DISPLAY_HDMI_CEC_HELPER
> +#define DRM_DISPLAY_HDMI_CEC_HELPER
> +
> +#include <drm/drm_connector.h>

Is there anything in this file that requires that include?

> +
> +#include <linux/types.h>
> +
> +struct drm_connector;
> +
> +struct cec_msg;
> +struct device;
> +
> +struct drm_connector_hdmi_cec_funcs {
> +	/**
> +	 * @init: perform hardware-specific initialization before registering the CEC adapter
> +	 */
> +	int (*init)(struct drm_connector *connector);
> +
> +	/**
> +	 * @uninit: perform hardware-specific teardown for the CEC adapter
> +	 */
> +	void (*uninit)(struct drm_connector *connector);
> +
> +	/**
> +	 * @enable: enable or disable CEC adapter
> +	 */
> +	int (*enable)(struct drm_connector *connector, bool enable);
> +
> +	/**
> +	 * @log_addr: set adapter's logical address, can be called multiple
> +	 * times if adapter supports several LAs
> +	 */
> +	int (*log_addr)(struct drm_connector *connector, u8 logical_addr);
> +
> +	/**
> +	 * @transmit: start transmission of the specified CEC message
> +	 */
> +	int (*transmit)(struct drm_connector *connector, u8 attempts,
> +			u32 signal_free_time, struct cec_msg *msg);
> +};
> +
> +int drm_connector_hdmi_cec_register(struct drm_connector *connector,
> +				    const struct drm_connector_hdmi_cec_funcs *funcs,
> +				    const char *name,
> +				    u8 available_las,
> +				    struct device *dev);
> +
> +void drm_connector_hdmi_cec_received_msg(struct drm_connector *connector,
> +					 struct cec_msg *msg);
> +
> +void drm_connector_hdmi_cec_transmit_done(struct drm_connector *connector,
> +					  u8 status,
> +					  u8 arb_lost_cnt, u8 nack_cnt,
> +					  u8 low_drive_cnt, u8 error_cnt);
> +
> +void drm_connector_hdmi_cec_transmit_attempt_done(struct drm_connector *connector,
> +						  u8 status);
> +
> +#if IS_ENABLED(CONFIG_DRM_DISPLAY_HDMI_CEC_NOTIFIER_HELPER)
> +int drm_connector_hdmi_cec_notifier_register(struct drm_connector *connector,
> +					     const char *port_name,
> +					     struct device *dev);
> +#else
> +static inline int drm_connector_hdmi_cec_notifier_register(struct drm_connector *connector,
> +							   const char *port_name,
> +							   struct device *dev)
> +{
> +	return 0;
> +}
> +#endif
> +
> +#endif

-- 
Jani Nikula, Intel