Oscar Mateo <oscar.mateo@xxxxxxxxx> writes:
> Prevents an error in the GAM unit. Also known as WaGamTlbPendError
>
> References: HSDES#1406463099
> References: HSDES#1406465643
> Signed-off-by: Oscar Mateo <oscar.mateo@xxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 5 +++--
> drivers/gpu/drm/i915/intel_workarounds.c | 7 +++++++
> 2 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 42835d79..8a18447 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -2306,8 +2306,9 @@ enum i915_power_well_id {
> #define GAMW_ECO_ENABLE_64K_IPS_FIELD 0xF
>
> #define GAMT_CHKN_BIT_REG _MMIO(0x4ab8)
> -#define GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING (1<<28)
> -#define GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT (1<<24)
> +#define GAMT_CHKN_DISABLE_L3_COH_PIPE (1 << 31)
> +#define GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING (1 << 28)
> +#define GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT (1 << 24)
>
> #if 0
> #define PRB0_TAIL _MMIO(0x2030)
> diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
> index 474e498..77929df 100644
> --- a/drivers/gpu/drm/i915/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/intel_workarounds.c
> @@ -859,6 +859,13 @@ static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
> PMFLUSHDONE_LNICRSDROP |
> PMFLUSH_GAPL3UNBLOCK |
> PMFLUSHDONE_LNEBLK);
> +
> + /* Wa_1406463099:icl
> + * Formerly known as WaGamTlbPendError
> + */
> + I915_WRITE(GAMT_CHKN_BIT_REG,
> + I915_READ(GAMT_CHKN_BIT_REG) |
> + GAMT_CHKN_DISABLE_L3_COH_PIPE);
> }
>
> void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
> --
> 1.9.1
>
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