[PATCH 14/25] drm/exynos: Use new drm_fb_helper functions

[Inki Dae]

On 2015년 07월 13일 15:38, Archit Taneja wrote:
> Use the newly created wrapper drm_fb_helper functions instead of calling
> core fbdev functions directly. They also simplify the fb_info creation.
> 
> COMPILE TESTED ONLY.
> 
> Cc: Inki Dae <inki.dae at samsung.com>
> Cc: Joonyoung Shim <jy0922.shim at samsung.com>
> Cc: Seung-Woo Kim <sw0312.kim at samsung.com>
> 
> Signed-off-by: Archit Taneja <architt at codeaurora.org>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 45 +++++++++----------------------
>  1 file changed, 12 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> index e0b085b..6975b70 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> @@ -65,9 +65,9 @@ static int exynos_drm_fb_mmap(struct fb_info *info,
>  static struct fb_ops exynos_drm_fb_ops = {
>  	.owner		= THIS_MODULE,
>  	.fb_mmap        = exynos_drm_fb_mmap,
> -	.fb_fillrect	= cfb_fillrect,
> -	.fb_copyarea	= cfb_copyarea,
> -	.fb_imageblit	= cfb_imageblit,
> +	.fb_fillrect	= drm_fb_helper_cfb_fillrect,
> +	.fb_copyarea	= drm_fb_helper_cfb_copyarea,
> +	.fb_imageblit	= drm_fb_helper_cfb_imageblit,
>  	.fb_check_var	= drm_fb_helper_check_var,
>  	.fb_set_par	= drm_fb_helper_set_par,
>  	.fb_blank	= drm_fb_helper_blank,
> @@ -142,10 +142,10 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
>  
>  	mutex_lock(&dev->struct_mutex);
>  
> -	fbi = framebuffer_alloc(0, &pdev->dev);
> -	if (!fbi) {
> +	fbi = drm_fb_helper_alloc_fbi(helper);
> +	if (IS_ERR(fbi)) {
>  		DRM_ERROR("failed to allocate fb info.\n");
> -		ret = -ENOMEM;
> +		ret = PTR_ERR(fbi);
>  		goto out;
>  	}
>  
> @@ -165,7 +165,7 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
>  
>  	if (IS_ERR(exynos_gem_obj)) {
>  		ret = PTR_ERR(exynos_gem_obj);
> -		goto err_release_framebuffer;
> +		goto err_release_fbi;
>  	}
>  
>  	exynos_fbdev->exynos_gem_obj = exynos_gem_obj;
> @@ -178,21 +178,13 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
>  		goto err_destroy_gem;
>  	}
>  
> -	helper->fbdev = fbi;
> -
>  	fbi->par = helper;
>  	fbi->flags = FBINFO_FLAG_DEFAULT;
>  	fbi->fbops = &exynos_drm_fb_ops;
>  
> -	ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
> -	if (ret) {
> -		DRM_ERROR("failed to allocate cmap.\n");
> -		goto err_destroy_framebuffer;
> -	}
> -
>  	ret = exynos_drm_fbdev_update(helper, sizes, helper->fb);
>  	if (ret < 0)
> -		goto err_dealloc_cmap;
> +		goto err_destroy_framebuffer;

With above change, err_dealloc_cmap label isn't used anymore so you need
to remove below lines,

err_dealloc_cmap:
	fb_dealloc_cmap(&fbi->cmap);

Thanks,
Inki Dae

>  
>  	mutex_unlock(&dev->struct_mutex);
>  	return ret;
> @@ -203,8 +195,8 @@ err_destroy_framebuffer:
>  	drm_framebuffer_cleanup(helper->fb);
>  err_destroy_gem:
>  	exynos_drm_gem_destroy(exynos_gem_obj);
> -err_release_framebuffer:
> -	framebuffer_release(fbi);
> +err_release_fbi:
> +	drm_fb_helper_release_fbi(helper);
>  
>  /*
>   * if failed, all resources allocated above would be released by
> @@ -312,21 +304,8 @@ static void exynos_drm_fbdev_destroy(struct drm_device *dev,
>  		}
>  	}
>  
> -	/* release linux framebuffer */
> -	if (fb_helper->fbdev) {
> -		struct fb_info *info;
> -		int ret;
> -
> -		info = fb_helper->fbdev;
> -		ret = unregister_framebuffer(info);
> -		if (ret < 0)
> -			DRM_DEBUG_KMS("failed unregister_framebuffer()\n");
> -
> -		if (info->cmap.len)
> -			fb_dealloc_cmap(&info->cmap);
> -
> -		framebuffer_release(info);
> -	}
> +	drm_fb_helper_unregister_fbi(fb_helper);
> +	drm_fb_helper_release_fbi(fb_helper);
>  
>  	drm_fb_helper_fini(fb_helper);
>  }
>