[PATCH] winsys/radeon: Allow visible VRAM size > 256MB with kernel driver >= 2.49

[Nicolai Hähnle]

Both patches:

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

On 31.01.2017 07:54, Michel Dänzer wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
>
> The kernel driver reports correct values now.
>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
> ---
>  src/gallium/winsys/radeon/drm/radeon_drm_winsys.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
> index a8da62fd36..cacd683879 100644
> --- a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
> +++ b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
> @@ -372,7 +372,12 @@ static bool do_winsys_init(struct radeon_drm_winsys *ws)
>      }
>      ws->info.gart_size = gem_info.gart_size;
>      ws->info.vram_size = gem_info.vram_size;
> -    ws->info.vram_vis_size = MIN2(gem_info.vram_visible, 256*1024*1024);
> +    ws->info.vram_vis_size = gem_info.vram_visible;
> +    /* Older versions of the kernel driver reported incorrect values, and
> +     * didn't support more than 256MB of visible VRAM anyway
> +     */
> +    if (ws->info.drm_minor < 49)
> +        ws->info.vram_vis_size = MIN2(ws->info.vram_vis_size, 256*1024*1024);
>
>      /* Radeon allocates all buffers as contigous, which makes large allocations
>       * unlikely to succeed. */
>