Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
Tested-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
On Thu, 2021-04-08 at 13:49 -0700, José Roberto de Souza wrote:
> This WA fix some display glitches when the system is under high
> memory pressure.
>
> BSpec: 52890
> Cc: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 3 +++
> drivers/gpu/drm/i915/intel_pm.c | 5 +++++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> index cbf7a60afe54..f4a779643f4d 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -12549,4 +12549,7 @@ enum skl_power_gate {
> #define TGL_ROOT_DEVICE_SKU_ULX 0x2
> #define TGL_ROOT_DEVICE_SKU_ULT 0x4
>
> +#define CLKREQ_POLICY _MMIO(0x101038)
> +#define CLKREQ_POLICY_MEM_UP_OVRD REG_BIT(1)
> +
> #endif /* _I915_REG_H_ */
> diff --git a/drivers/gpu/drm/i915/intel_pm.c
> b/drivers/gpu/drm/i915/intel_pm.c
> index 32f301ca3ab0..8e39e30036b2 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -7141,6 +7141,11 @@ static void gen12lp_init_clock_gating(struct
> drm_i915_private *dev_priv)
> /* Wa_14011059788:tgl,rkl,adl_s,dg1 */
> intel_uncore_rmw(&dev_priv->uncore,
> GEN10_DFR_RATIO_EN_AND_CHICKEN,
> 0, DFR_DISABLE);
> +
> + /* Wa_14013723622:tgl,rkl,dg1,adl-s */
> + if (DISPLAY_VER(dev_priv) == 12)
> + intel_uncore_rmw(&dev_priv->uncore, CLKREQ_POLICY,
> + CLKREQ_POLICY_MEM_UP_OVRD, 0);
> }
>
> static void dg1_init_clock_gating(struct drm_i915_private *dev_priv)
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