Hi,
> -----Original Message-----
> From: Upadhyay, Tejas <[email protected]>
> Sent: Tuesday, July 30, 2024 4:21 PM
> To: Gote, Nitin R <[email protected]>; [email protected];
> Roper, Matthew D <[email protected]>
> Cc: Shyti, Andi <[email protected]>; Wilson, Chris P
> <[email protected]>
> Subject: RE: [PATCH v2] drm/i915: Add Wa_14019789679
>
>
>
> > -----Original Message-----
> > From: Gote, Nitin R <[email protected]>
> > Sent: Tuesday, July 30, 2024 1:22 PM
> > To: [email protected]; Upadhyay, Tejas
> > <[email protected]>; Roper, Matthew D
> > <[email protected]>
> > Cc: Shyti, Andi <[email protected]>; Wilson, Chris P
> > <[email protected]>; Gote, Nitin R <[email protected]>
> > 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 <[email protected]>
> > ---
> > 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!
>
Correct. I will update accordingly.
> >
> > #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
Agree. I will update in v3 version.
- Nitin
> > + }
> > +
> > intel_uncore_forcewake_put__locked(uncore, fw);
> > spin_unlock(&uncore->lock);
> > intel_gt_mcr_unlock(wal->gt, flags);
> > --
> > 2.25.1
