> -----Original Message-----
> From: Gote, Nitin R <nitin.r.gote@xxxxxxxxx>
> Sent: Tuesday, July 30, 2024 1:22 PM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; Upadhyay, Tejas
> <tejas.upadhyay@xxxxxxxxx>; Roper, Matthew D
> <matthew.d.roper@xxxxxxxxx>
> Cc: Shyti, Andi <andi.shyti@xxxxxxxxx>; Wilson, Chris P
> <chris.p.wilson@xxxxxxxxx>; Gote, Nitin R <nitin.r.gote@xxxxxxxxx>
> Subject: [PATCH v2] drm/i915: Add Wa_14019789679
>
> Wa_14019789679 implementation for MTL, ARL and DG2.
>
> v2: Corrected condition
>
> Bspec: 47083
>
> Signed-off-by: Nitin Gote <nitin.r.gote@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 1 +
> drivers/gpu/drm/i915/gt/intel_workarounds.c | 14 +++++++++++++-
> 2 files changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> index 2bd8d98d2110..c143d8133a28 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
> @@ -220,6 +220,7 @@
> #define GFX_OP_DESTBUFFER_INFO
> ((0x3<<29)|(0x1d<<24)|(0x8e<<16)|1)
> #define GFX_OP_DRAWRECT_INFO
> ((0x3<<29)|(0x1d<<24)|(0x80<<16)|(0x3))
> #define GFX_OP_DRAWRECT_INFO_I965 ((0x7900<<16)|0x2)
> +#define CMD_3DSTATE_MESH_CONTROL
> +((0x3<<29)|(0x3<<27)|(0x0<<24)|(0x77<<16)|(0x3))
I think number of dword should be 0x1!
>
> #define XY_CTRL_SURF_INSTR_SIZE 5
> #define MI_FLUSH_DW_SIZE 3
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index 09a287c1aedd..cbc2003886d5 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -974,7 +974,12 @@ int intel_engine_emit_ctx_wa(struct i915_request
> *rq)
> if (ret)
> return ret;
>
> - cs = intel_ring_begin(rq, (wal->count * 2 + 2));
> + if ((GRAPHICS_VER_FULL(rq->i915) >= IP_VER(12, 70) &&
> + GRAPHICS_VER_FULL(rq->i915) <= IP_VER(12, 74)) ||
> IS_DG2(rq->i915))
> + cs = intel_ring_begin(rq, (wal->count * 2 + 4));
> + else
> + cs = intel_ring_begin(rq, (wal->count * 2 + 2));
> +
> if (IS_ERR(cs))
> return PTR_ERR(cs);
>
> @@ -1004,6 +1009,13 @@ int intel_engine_emit_ctx_wa(struct i915_request
> *rq)
> }
> *cs++ = MI_NOOP;
>
> + /* Wa_14019789679 */
> + if ((GRAPHICS_VER_FULL(rq->i915) >= IP_VER(12, 70) &&
> + GRAPHICS_VER_FULL(rq->i915) <= IP_VER(12, 74)) ||
> IS_DG2(rq->i915)) {
> + *cs++ = CMD_3DSTATE_MESH_CONTROL;
> + *cs++ = MI_NOOP;
I think write dword 0 as asked by WA description. So it will be *cs++ = 0; in place of *cs++ = MI_NOOP;
Tejas
> + }
> +
> intel_uncore_forcewake_put__locked(uncore, fw);
> spin_unlock(&uncore->lock);
> intel_gt_mcr_unlock(wal->gt, flags);
> --
> 2.25.1
