On Tue, May 17, 2022 at 11:02:01AM -0700, Swathi Dhanavanthri wrote:
> Bspec: 45810,54077,68173
>
> Signed-off-by: Swathi Dhanavanthri <swathi.dhanavanthri@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 +
> drivers/gpu/drm/i915/gt/intel_workarounds.c | 9 +++++++++
> 2 files changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> index 98ede9c93f00..2063c8758934 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> @@ -1068,6 +1068,7 @@
> #define GEN9_ENABLE_GPGPU_PREEMPTION REG_BIT(2)
>
> #define GEN10_CACHE_MODE_SS _MMIO(0xe420)
> +#define ENABLE_EU_COUNT_FOR_TDL_FLUSH REG_BIT(10)
I think this line has some spaces before REG_BIT(). We should only be
using tabs between the variable name and the 'REG_BIT.'
> #define ENABLE_PREFETCH_INTO_IC REG_BIT(3)
> #define FLOAT_BLEND_OPTIMIZATION_ENABLE REG_BIT(4)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index 756807c4b405..c647a9e48389 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -2178,6 +2178,15 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
> wa_write_or(wal, GEN12_MERT_MOD_CTRL, FORCE_MISS_FTLB);
> }
>
> + if (IS_DG2_GRAPHICS_STEP(i915, G11, STEP_B0, STEP_FOREVER) ||
> + IS_DG2_G10(i915)) {
> + /* Wa_22014600077:dg2 */
> + wa_add(wal, GEN10_CACHE_MODE_SS, 0,
> + _MASKED_BIT_ENABLE(ENABLE_EU_COUNT_FOR_TDL_FLUSH),
> + 0 /* write-only, so skip validation */,
The fact that this register is WO is itself a different workaround, so
you may want to reference that in the comment. E.g.,
0 /* Wa_14012342262: write-only reg, skip verification */
Matt
> + true);
> + }
> +
> if (IS_DG1_GRAPHICS_STEP(i915, STEP_A0, STEP_B0) ||
> IS_TGL_UY_GRAPHICS_STEP(i915, STEP_A0, STEP_B0)) {
> /*
> --
> 2.20.1
>
--
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
