[Intel-gfx] [PATCH 7/7] drm/i915: Enable GGTT updates with binder in MTL

[Zeng, Oak]

Reviewed-by: Oak Zeng <oak.zeng at intel.com>

Thanks,
Oak

> -----Original Message-----
> From: Das, Nirmoy <nirmoy.das at intel.com>
> Sent: Wednesday, September 13, 2023 9:10 AM
> To: intel-gfx at lists.freedesktop.org
> Cc: Zeng, Oak <oak.zeng at intel.com>; chris.p.wilson at linux.intel.com; Piorkowski,
> Piotr <piotr.piorkowski at intel.com>; Shyti, Andi <andi.shyti at intel.com>; Mun,
> Gwan-gyeong <gwan-gyeong.mun at intel.com>; Roper, Matthew D
> <matthew.d.roper at intel.com>; Das, Nirmoy <nirmoy.das at intel.com>
> 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 at intel.com>
> ---
>  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