linux-kernel - Re: [PATCH drm/hisilicon 1/2] drm/hisilicon: Use managed mode-config init

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Date:   Mon, 7 Dec 2020 09:03:45 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Tian Tao <tiantao6@...ilicon.com>, airlied@...ux.ie,
        daniel@...ll.ch, kraxel@...hat.com, alexander.deucher@....com,
        tglx@...utronix.de, dri-devel@...ts.freedesktop.org,
        xinliang.liu@...aro.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH drm/hisilicon 1/2] drm/hisilicon: Use managed mode-config
 init

Hi

Am 07.12.20 um 01:49 schrieb Tian Tao:
> Using drmm_mode_config_init() sets up managed release of modesetting
> resources.
> Signed-off-by: Tian Tao <tiantao6@...ilicon.com>
> ---
>   drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 13 +++----------
>   1 file changed, 3 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> index 3687753..d631f82 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> @@ -96,7 +96,9 @@ static int hibmc_kms_init(struct hibmc_drm_private *priv)
>   	struct drm_device *dev = &priv->dev;
>   	int ret;
>   
> -	drm_mode_config_init(dev);
> +	ret = drmm_mode_config_init(dev);
> +	if (ret)
> +		return ret;
>   	priv->mode_config_initialized = true;

I think mode_config_initialized is only required by hibmc_kms_finit(), 
which you remove. You should remove this line and the field from struct 
hibmc_drm_private.

Best regards
Thomas

>   
>   	dev->mode_config.min_width = 0;
> @@ -125,14 +127,6 @@ static int hibmc_kms_init(struct hibmc_drm_private *priv)
>   	return 0;
>   }
>   
> -static void hibmc_kms_fini(struct hibmc_drm_private *priv)
> -{
> -	if (priv->mode_config_initialized) {
> -		drm_mode_config_cleanup(&priv->dev);
> -		priv->mode_config_initialized = false;
> -	}
> -}
> -
>   /*
>    * It can operate in one of three modes: 0, 1 or Sleep.
>    */
> @@ -262,7 +256,6 @@ static int hibmc_unload(struct drm_device *dev)
>   	drm_atomic_helper_shutdown(dev);
>   
>   	pci_disable_msi(dev->pdev);
> -	hibmc_kms_fini(priv);
>   	dev->dev_private = NULL;
>   	return 0;
>   }
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer



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