Re: [PATCH v2 04/11] drm/tegra: Set fbdev FBINFO_VIRTFB flag

[Thierry Reding <thierry.reding@gmail.com>]

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On Thu, Jul 06, 2023 at 02:46:42PM +0200, Thomas Zimmermann wrote:
> Mark the framebuffer with FBINFO_VIRTFB. The framebuffer range is
> in DMA-able memory and should be accessed with the CPU's regular
> memory ops.
> 
> v2:
> 	* drop FBINFO_DEFAULT
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
> Acked-by: Maxime Ripard <mripard@kernel.org>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Mikko Perttunen <mperttunen@nvidia.com>
> ---
>  drivers/gpu/drm/tegra/fbdev.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/tegra/fbdev.c b/drivers/gpu/drm/tegra/fbdev.c
> index 82577b7c88da..d8460c5dc91e 100644
> --- a/drivers/gpu/drm/tegra/fbdev.c
> +++ b/drivers/gpu/drm/tegra/fbdev.c
> @@ -132,6 +132,7 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper,
>  		}
>  	}
>  
> +	info->flags |= FBINFO_VIRTFB;
>  	info->screen_base = (void __iomem *)bo->vaddr + offset;

As part of this, do we also need to set info->screen_buffer instead of
info->screen_base? The drm_fbdev_dma_helper functions do that.

Thierry

>  	info->screen_size = size;
>  	info->fix.smem_start = (unsigned long)(bo->iova + offset);
> -- 
> 2.41.0
> 

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