[Intel-gfx] [PATCH 3/9] drm/i915/gen12: Add L3 fabric flush

[Chris Wilson]

Quoting Mika Kuoppala (2020-04-30 16:47:29)
> Do a l3 fabric flush when emitting flush.

It's quoted as being a debug bit, and that the L3 flush is a part of the
post-sync op.

Not sure if we want this without being told we must, or reason to
believe we do.

> Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 1 +
>  drivers/gpu/drm/i915/gt/intel_lrc.c          | 2 ++
>  2 files changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> index 534e435f20bc..98b39e65aed9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> @@ -219,6 +219,7 @@
>  #define   DISPLAY_PLANE_A           (0<<20)
>  #define   DISPLAY_PLANE_B           (1<<20)
>  #define GFX_OP_PIPE_CONTROL(len)       ((0x3<<29)|(0x3<<27)|(0x2<<24)|((len)-2))
> +#define   PIPE_CONTROL_L3_FABRIC_FLUSH                 (1<<30) /* gen12+ */

Nevertheless bits check out,

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris