Commit 41c70d2b authored by José Roberto de Souza's avatar José Roberto de Souza
Browse files

drm/i915/display: Implement Wa_14013723622 



This WA fix some display glitches when the system is under high
memory pressure.

BSpec: 52890
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
Reviewed-by: default avatarGwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Tested-by: default avatarGwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210408204917.254272-1-jose.souza@intel.com
parent c87eba80

drivers/gpu/drm/i915/i915_reg.h

+3 −0
Original line number Diff line number Diff line
@@ -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_ */

drivers/gpu/drm/i915/intel_pm.c

+5 −0
Original line number Diff line number Diff line
@@ -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)