PSR2 workaround required when mode has delayed vblank. BSpec: 52890 BSpec: 49421 Cc: Jouni Högander <jouni.hogan...@intel.com> Signed-off-by: José Roberto de Souza <jose.so...@intel.com> --- drivers/gpu/drm/i915/display/intel_psr.c | 40 ++++++++++++++++++++++-- drivers/gpu/drm/i915/i915_reg.h | 13 +++++--- 2 files changed, 46 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 72bd8d3261e0c..2e0b092f4b6be 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -1063,7 +1063,23 @@ static void intel_psr_activate(struct intel_dp *intel_dp) intel_dp->psr.active = true; } -static void intel_psr_enable_source(struct intel_dp *intel_dp) +static u32 wa_16013835468_bit_get(struct intel_dp *intel_dp) +{ + switch (intel_dp->psr.pipe) { + case PIPE_A: + return LATENCY_REPORTING_REMOVED_PIPE_A; + case PIPE_B: + return LATENCY_REPORTING_REMOVED_PIPE_B; + case PIPE_C: + return LATENCY_REPORTING_REMOVED_PIPE_C; + default: + MISSING_CASE(intel_dp->psr.pipe); + return 0; + } +} + +static void intel_psr_enable_source(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); enum transcoder cpu_transcoder = intel_dp->psr.transcoder; @@ -1133,6 +1149,20 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp) if (IS_ALDERLAKE_P(dev_priv)) intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0, CLKGATE_DIS_MISC_DMASC_GATING_DIS); + + /* Wa_16013835468:tgl[b0+], dg1 */ + if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0, STEP_FOREVER) || + IS_DG1(dev_priv)) { + u16 vtotal, vblank; + + vtotal = crtc_state->uapi.adjusted_mode.crtc_vtotal - + crtc_state->uapi.adjusted_mode.crtc_vdisplay; + vblank = crtc_state->uapi.adjusted_mode.crtc_vblank_end - + crtc_state->uapi.adjusted_mode.crtc_vblank_start; + if (vblank > vtotal) + intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0, + wa_16013835468_bit_get(intel_dp)); + } } } @@ -1198,7 +1228,7 @@ static void intel_psr_enable_locked(struct intel_dp *intel_dp, intel_write_dp_vsc_sdp(encoder, crtc_state, &crtc_state->psr_vsc); intel_snps_phy_update_psr_power_state(dev_priv, phy, true); intel_psr_enable_sink(intel_dp); - intel_psr_enable_source(intel_dp); + intel_psr_enable_source(intel_dp, crtc_state); intel_dp->psr.enabled = true; intel_dp->psr.paused = false; @@ -1297,6 +1327,12 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp) if (IS_ALDERLAKE_P(dev_priv)) intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0); + + /* Wa_16013835468:tgl[b0+], dg1 */ + if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0, STEP_FOREVER) || + IS_DG1(dev_priv)) + intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, + wa_16013835468_bit_get(intel_dp), 0); } intel_snps_phy_update_psr_power_state(dev_priv, phy, false); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 87c92314ee269..1cd4056400b63 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6040,11 +6040,14 @@ #define HSW_NDE_RSTWRN_OPT _MMIO(0x46408) #define RESET_PCH_HANDSHAKE_ENABLE (1 << 4) -#define GEN8_CHICKEN_DCPR_1 _MMIO(0x46430) -#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 GEN8_CHICKEN_DCPR_1 _MMIO(0x46430) +#define SKL_SELECT_ALTERNATE_DC_EXIT REG_BIT(30) +#define LATENCY_REPORTING_REMOVED_PIPE_C REG_BIT(25) +#define LATENCY_REPORTING_REMOVED_PIPE_B REG_BIT(24) +#define LATENCY_REPORTING_REMOVED_PIPE_A REG_BIT(23) +#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) -- 2.35.1