Reviewed-by: Marek Olšák <marek.olsak@xxxxxxx>
Marek
On Thu, Jul 31, 2014 at 11:43 AM, Michel Dänzer <michel@xxxxxxxxxxx> wrote:
> From: Michel Dänzer <michel.daenzer@xxxxxxx>
>
> Signed-off-by: Michel Dänzer <michel.daenzer@xxxxxxx>
> ---
> src/gallium/drivers/radeon/r600_buffer_common.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
> index 4e6b897..154c33d 100644
> --- a/src/gallium/drivers/radeon/r600_buffer_common.c
> +++ b/src/gallium/drivers/radeon/r600_buffer_common.c
> @@ -127,13 +127,17 @@ bool r600_init_resource(struct r600_common_screen *rscreen,
> break;
> }
>
> - /* Use GTT for all persistent mappings, because they are
> - * always cached and coherent. */
> - if (res->b.b.target == PIPE_BUFFER &&
> + /* Use GTT for all persistent mappings with older kernels, because they
> + * didn't always flush the HDP cache before CS execution.
> + *
> + * Write-combined CPU mappings are fine, the kernel ensures all CPU
> + * writes finish before the GPU executes a command stream.
> + */
> + if (rscreen->info.drm_minor < 40 &&
> + res->b.b.target == PIPE_BUFFER &&
> res->b.b.flags & (PIPE_RESOURCE_FLAG_MAP_PERSISTENT |
> PIPE_RESOURCE_FLAG_MAP_COHERENT)) {
> res->domains = RADEON_DOMAIN_GTT;
> - flags = 0;
> }
>
> /* Tiled textures are unmappable. Always put them in VRAM. */
> --
> 2.0.1
>
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