On Mon, Mar 18, 2024 at 02:00:25PM -0700, Radhakrishna Sripada wrote:
> Disable clockgating for TDL SVHS fub.
>
> v2: Implement in general render/compute wa's(MattR)
>
> Bspec: 46045
> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
> Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 +
> drivers/gpu/drm/i915/gt/intel_workarounds.c | 6 +++++-
> 2 files changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> index 50962cfd1353..1f778b77f4f8 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> @@ -1215,6 +1215,7 @@
> #define GEN12_DISABLE_EARLY_READ REG_BIT(14)
> #define GEN12_ENABLE_LARGE_GRF_MODE REG_BIT(12)
> #define GEN12_PUSH_CONST_DEREF_HOLD_DIS REG_BIT(8)
> +#define XELPG_DISABLE_TDL_SVHS_GATING REG_BIT(1)
> #define GEN12_DISABLE_DOP_GATING REG_BIT(0)
>
> #define RT_CTRL MCR_REG(0xe530)
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index b079cbbc1897..d2c63ecc490e 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -2892,10 +2892,14 @@ general_render_compute_wa_init(struct intel_engine_cs *engine, struct i915_wa_li
>
> if (IS_GFX_GT_IP_STEP(gt, IP_VER(12, 70), STEP_B0, STEP_FOREVER) ||
> IS_GFX_GT_IP_STEP(gt, IP_VER(12, 71), STEP_B0, STEP_FOREVER) ||
> - IS_GFX_GT_IP_RANGE(gt, IP_VER(12, 74), IP_VER(12, 74)))
> + IS_GFX_GT_IP_RANGE(gt, IP_VER(12, 74), IP_VER(12, 74))) {
> /* Wa_14017856879 */
> wa_mcr_masked_en(wal, GEN9_ROW_CHICKEN3, MTL_DISABLE_FIX_FOR_EOT_FLUSH);
>
> + /* Wa_14020495402 */
> + wa_mcr_masked_en(wal, GEN8_ROW_CHICKEN2, XELPG_DISABLE_TDL_SVHS_GATING);
> + }
> +
> if (IS_GFX_GT_IP_STEP(gt, IP_VER(12, 70), STEP_A0, STEP_B0) ||
> IS_GFX_GT_IP_STEP(gt, IP_VER(12, 71), STEP_A0, STEP_B0))
> /*
> --
> 2.34.1
>
--
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation
