linux-kernel - Re: [PATCH v4 15/16] drm/vkms: Allow to update the connector status

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Message-ID: <7480ebe0-30ac-4ef5-8c13-6e3ac0c57193@bootlin.com>
Date: Tue, 15 Apr 2025 14:48:03 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: José Expósito <jose.exposito89@...il.com>
Cc: hamohammed.sa@...il.com, simona@...ll.ch, melissa.srw@...il.com,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 airlied@...il.com, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 15/16] drm/vkms: Allow to update the connector status



Le 07/04/2025 à 10:14, José Expósito a écrit :
> Implement the drm_connector_funcs.detect() callback to update the
> connector status by returning the status stored in the configuration.
> 
> Signed-off-by: José Expósito <jose.exposito89@...il.com>

Reviewed-by: Louis Chauvet <louis.chauvet@...tlin.com>

> ---
>   drivers/gpu/drm/vkms/vkms_connector.c | 28 +++++++++++++++++++++++++++
>   drivers/gpu/drm/vkms/vkms_connector.h |  3 +++
>   2 files changed, 31 insertions(+)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_connector.c b/drivers/gpu/drm/vkms/vkms_connector.c
> index 48b10cba322a..89fa8d9d739b 100644
> --- a/drivers/gpu/drm/vkms/vkms_connector.c
> +++ b/drivers/gpu/drm/vkms/vkms_connector.c
> @@ -5,9 +5,37 @@
>   #include <drm/drm_managed.h>
>   #include <drm/drm_probe_helper.h>
>   
> +#include "vkms_config.h"
>   #include "vkms_connector.h"
>   
> +static enum drm_connector_status vkms_connector_detect(struct drm_connector *connector,
> +						       bool force)
> +{
> +	struct drm_device *dev = connector->dev;
> +	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
> +	struct vkms_connector *vkms_connector;
> +	enum drm_connector_status status;
> +	struct vkms_config_connector *connector_cfg;
> +
> +	vkms_connector = drm_connector_to_vkms_connector(connector);
> +
> +	/*
> +	 * The connector configuration might not exist if its configfs directory
> +	 * was deleted. Therefore, use the configuration if present or keep the
> +	 * current status if we can not access it anymore.
> +	 */
> +	status = connector->status;
> +
> +	vkms_config_for_each_connector(vkmsdev->config, connector_cfg) {
> +		if (connector_cfg->connector == vkms_connector)
> +			status = vkms_config_connector_get_status(connector_cfg);
> +	}
> +
> +	return status;
> +}
> +
>   static const struct drm_connector_funcs vkms_connector_funcs = {
> +	.detect = vkms_connector_detect,
>   	.fill_modes = drm_helper_probe_single_connector_modes,
>   	.reset = drm_atomic_helper_connector_reset,
>   	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> diff --git a/drivers/gpu/drm/vkms/vkms_connector.h b/drivers/gpu/drm/vkms/vkms_connector.h
> index c9149c1b7af0..90f835f70b3b 100644
> --- a/drivers/gpu/drm/vkms/vkms_connector.h
> +++ b/drivers/gpu/drm/vkms/vkms_connector.h
> @@ -5,6 +5,9 @@
>   
>   #include "vkms_drv.h"
>   
> +#define drm_connector_to_vkms_connector(target) \
> +	container_of(target, struct vkms_connector, base)
> +
>   /**
>    * struct vkms_connector - VKMS custom type wrapping around the DRM connector
>    *

-- 
Louis Chauvet, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com