[Mesa-dev] [PATCH] radv: disable DCC for X4 Foundations to workaround a GPU hang

[Samuel Pitoiset]

Please ignore this fix too, the GPU hang is actually unrelated to DCC.

On 3/6/19 7:39 PM, Samuel Pitoiset wrote:
> The game apparently hangs inside a copy image operation, but
> only when DCC is enabled. I haven't figured out the root cause
> yet, but this workaround fixes the problem and allows people
> to play that title, at least.
>
> Cc: 18.3 19.0 <mesa-stable at lists.freedesktop.org>
> Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
> ---
>   src/amd/vulkan/radv_device.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
> index fc04de21025..bb76885d986 100644
> --- a/src/amd/vulkan/radv_device.c
> +++ b/src/amd/vulkan/radv_device.c
> @@ -510,6 +510,12 @@ radv_handle_per_app_options(struct radv_instance *instance,
>   	} else if (!strcmp(name, "DOOM_VFR")) {
>   		/* Work around a Doom VFR game bug */
>   		instance->debug_flags |= RADV_DEBUG_NO_DYNAMIC_BOUNDS;
> +	} else if (!strcmp(name, "X4")) {
> +		/* FIXME: X4 Foundations hangs the GPU on GFX9. It seems to
> +		 * work on GFX8, but I think it's safer to disable DCC
> +		 * everywhere for now.
> +		 */
> +		instance->debug_flags |= RADV_DEBUG_NO_DCC;
>   	}
>   }
>