[PATCH] drm/etnaviv: Always init gpu->memory_base

[Lucas Stach]

Am Freitag, den 26.08.2016, 16:25 +0200 schrieb Marek Vasut:
> The content of gpu->memory_base should point to start of RAM, not zero.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Lucas Stach <l.stach at pengutronix.de>
> Cc: Christian Gmeiner <christian.gmeiner at gmail.com>
> Cc: Russell King <rmk+kernel at arm.linux.org.uk>

NACK. This will cause memory corruption when used with a MC10 GPU. The
checks are there for a reason. ;)

I'll have to think about a proper solution for MX6SX.

> ---
>  drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c 
> b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> index ff6aa5d..a168532 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> @@ -588,6 +588,8 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
>                       gpu->memory_base = PHYS_OFFSET;
>               else
>                       gpu->memory_base = dma_mask - SZ_2G + 1;
> +     } else {
> +             gpu->memory_base = PHYS_OFFSET;
>       }
>  
>       ret = etnaviv_hw_reset(gpu);