[Mesa-dev] [PATCH 2/2] i965/blorp: Do the gen11 BTI flush

[Anuj Phogat]

For the series:
Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>

This might explain piglit GPU hangs or failures. I'll do a piglit run with
these patches.
Thanks
Anuj

On Tue, Apr 17, 2018 at 3:10 PM, Jason Ekstrand <jason at jlekstrand.net>
wrote:

> ---
>  src/mesa/drivers/dri/i965/genX_blorp_exec.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> index 3406a6f..a6cb0e3 100644
> --- a/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> +++ b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> @@ -241,6 +241,20 @@ genX(blorp_exec)(struct blorp_batch *batch,
>     struct gl_context *ctx = &brw->ctx;
>     bool check_aperture_failed_once = false;
>
> +#if GEN_GEN >= 11
> +   /* The PIPE_CONTROL command description says:
> +    *
> +    * "Whenever a Binding Table Index (BTI) used by a Render Taget Message
> +    *  points to a different RENDER_SURFACE_STATE, SW must issue a Render
> +    *  Target Cache Flush by enabling this bit. When render target flush
> +    *  is set due to new association of BTI, PS Scoreboard Stall bit must
> +    *  be set in this packet."
> +   */
> +   brw_emit_pipe_control_flush(brw,
> +                               PIPE_CONTROL_RENDER_TARGET_FLUSH |
> +                               PIPE_CONTROL_STALL_AT_SCOREBOARD);
> +#endif
> +
>     /* Flush the sampler and render caches.  We definitely need to flush
> the
>      * sampler cache so that we get updated contents from the render cache
> for
>      * the glBlitFramebuffer() source.  Also, we are sometimes warned in
> the
> --
> 2.5.0.400.gff86faf
>
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