Reviewed-by: Oak Zeng <oak.zeng@xxxxxxxxx>
Thanks,
Oak
> -----Original Message-----
> From: Das, Nirmoy <nirmoy.das@xxxxxxxxx>
> Sent: Wednesday, September 13, 2023 9:10 AM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Zeng, Oak <oak.zeng@xxxxxxxxx>; chris.p.wilson@xxxxxxxxxxxxxxx; Piorkowski,
> Piotr <piotr.piorkowski@xxxxxxxxx>; Shyti, Andi <andi.shyti@xxxxxxxxx>; Mun,
> Gwan-gyeong <gwan-gyeong.mun@xxxxxxxxx>; Roper, Matthew D
> <matthew.d.roper@xxxxxxxxx>; Das, Nirmoy <nirmoy.das@xxxxxxxxx>
> Subject: [PATCH 7/7] drm/i915: Enable GGTT updates with binder in MTL
>
> MTL can hang because of a HW bug while parallel reading/writing
> from/to LMEM/GTTMMADR BAR so try to reduce GGTT update
> related pci transactions with blitter command as recommended
> for Wa_13010847436 and Wa_14019519902.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/intel_gtt.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c
> b/drivers/gpu/drm/i915/gt/intel_gtt.c
> index 4c89eb8d9af7..4fbed27ef0ec 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
> @@ -23,7 +23,8 @@
>
> bool i915_ggtt_require_binder(struct drm_i915_private *i915)
> {
> - return false;
> + /* Wa_13010847436 & Wa_14019519902 */
> + return MEDIA_VER_FULL(i915) == IP_VER(13, 0);
> }
>
> static bool intel_ggtt_update_needs_vtd_wa(struct drm_i915_private *i915)
> --
> 2.41.0
