drm/i915/adlp: Implement workaround 16013190616

New workaround added to specification, requiring bit 15 of
GEN8_CHICKEN_DCPR_1 to be programed before power well 1 is enabled.

BSpec: 54369
Signed-off-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
Reviewed-by: default avatarImre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211028230449.115832-1-jose.souza@intel.com
parent c34c1c4c
......@@ -435,6 +435,11 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
pg = DISPLAY_VER(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) :
SKL_PW_CTL_IDX_TO_PG(pw_idx);
/* Wa_16013190616:adlp */
if (IS_ALDERLAKE_P(dev_priv) && pg == SKL_PG1)
intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0, DISABLE_FLR_SRC);
/*
* For PW1 we have to wait both for the PW0/PG0 fuse state
* before enabling the power well and PW1/PG1's own fuse
......
......@@ -8308,9 +8308,10 @@ enum {
#define RESET_PCH_HANDSHAKE_ENABLE (1 << 4)
#define GEN8_CHICKEN_DCPR_1 _MMIO(0x46430)
#define SKL_SELECT_ALTERNATE_DC_EXIT (1 << 30)
#define ICL_DELAY_PMRSP (1 << 22)
#define MASK_WAKEMEM (1 << 13)
#define SKL_SELECT_ALTERNATE_DC_EXIT REG_BIT(30)
#define ICL_DELAY_PMRSP REG_BIT(22)
#define DISABLE_FLR_SRC REG_BIT(15)
#define MASK_WAKEMEM REG_BIT(13)
#define GEN11_CHICKEN_DCPR_2 _MMIO(0x46434)
#define DCPR_MASK_MAXLATENCY_MEMUP_CLR REG_BIT(27)
......
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