linux-kernel - Re: [PATCH v4 1/5] drm/vkms: Switch to managed for connector

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Message-ID: <575323aa-d322-4d03-8343-15aaaa955437@riseup.net>
Date: Sat, 26 Oct 2024 12:29:39 -0300
From: Maíra Canal <mairacanal@...eup.net>
To: Louis Chauvet <louis.chauvet@...tlin.com>,
 Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
 Melissa Wen <melissa.srw@...il.com>,
 Haneen Mohammed <hamohammed.sa@...il.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>,
 Simona Vetter <simona.vetter@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net,
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com,
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com,
 seanpaul@...gle.com, nicolejadeyee@...gle.com,
 20241010-vkms-remove-index-v2-1-6b8d6cfd5a15@...tlin.com
Subject: Re: [PATCH v4 1/5] drm/vkms: Switch to managed for connector

Hi Louis,

On 10/10/24 14:39, Louis Chauvet wrote:
> The current VKMS driver uses non-managed function to create connectors. It
> is not an issue yet, but in order to support multiple devices easily,
> convert this code to use drm and device managed helpers.
> 
> Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
> ---
>   drivers/gpu/drm/vkms/vkms_output.c | 19 +++++++------------
>   1 file changed, 7 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
> index 5128aa3b2eb6..8f7a05b73e1d 100644
> --- a/drivers/gpu/drm/vkms/vkms_output.c
> +++ b/drivers/gpu/drm/vkms/vkms_output.c
> @@ -3,11 +3,11 @@
>   #include "vkms_drv.h"
>   #include <drm/drm_atomic_helper.h>
>   #include <drm/drm_edid.h>
> +#include <drm/drm_managed.h>
>   #include <drm/drm_probe_helper.h>
>   
>   static const struct drm_connector_funcs vkms_connector_funcs = {
>   	.fill_modes = drm_helper_probe_single_connector_modes,
> -	.destroy = drm_connector_cleanup,
>   	.reset = drm_atomic_helper_connector_reset,
>   	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
>   	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> @@ -70,17 +70,17 @@ int vkms_output_init(struct vkms_device *vkmsdev)
>   			if (IS_ERR(overlay)) {
>   				DRM_DEV_ERROR(dev->dev, "Failed to init vkms plane\n");
>   				ret = PTR_ERR(overlay);
> -				goto err_crtc;
> +				goto err_connector;

Why did you renamed err_crtc to err_connector? I think err_crtc looks
correct.

Best Regards,
- Maíra

>   			}
>   			overlay->base.possible_crtcs = drm_crtc_mask(crtc);
>   		}
>   	}
>   
> -	ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
> -				 DRM_MODE_CONNECTOR_VIRTUAL);
> +	ret = drmm_connector_init(dev, connector, &vkms_connector_funcs,
> +				  DRM_MODE_CONNECTOR_VIRTUAL, NULL);
>   	if (ret) {
>   		DRM_ERROR("Failed to init connector\n");
> -		goto err_crtc;
> +		goto err_connector;
>   	}
>   
>   	drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
> @@ -89,7 +89,7 @@ int vkms_output_init(struct vkms_device *vkmsdev)
>   			       DRM_MODE_ENCODER_VIRTUAL, NULL);
>   	if (ret) {
>   		DRM_ERROR("Failed to init encoder\n");
> -		goto err_encoder;
> +		return ret;
>   	}
>   	encoder->possible_crtcs = drm_crtc_mask(crtc);
>   
> @@ -111,12 +111,7 @@ int vkms_output_init(struct vkms_device *vkmsdev)
>   
>   err_attach:
>   	drm_encoder_cleanup(encoder);
> -
> -err_encoder:
> -	drm_connector_cleanup(connector);
> -
> -err_crtc:
> +err_connector:
>   	drm_crtc_cleanup(crtc);
> -
>   	return ret;
>   }
>