[Intel-gfx] [PATCH 3/6] drm/i915/display/adl_p: Implement Wa_16011168373

José Roberto de Souza
2021-06-16T20:28:23Z

Another WA that is required for PSR2.

BSpec: 54369
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
---
drivers/gpu/drm/i915/display/intel_psr.c | 15 +++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 8 ++++++++
2 files changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index c8d56387d9233..e508816911fad 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1112,6 +1112,14 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
intel_de_rmw(dev_priv, CHICKEN_PAR1_1, IGNORE_PSR2_HW_TRACKING,
intel_dp->psr.psr2_sel_fetch_enabled ?
IGNORE_PSR2_HW_TRACKING : 0);
+
+ /* Wa_16011168373:adlp */
+ if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_A0) &&
+ intel_dp->psr.psr2_enabled)
+ intel_de_rmw(dev_priv,
+ TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
+ TRANS_SET_CONTEXT_LATENCY_MASK,
+ TRANS_SET_CONTEXT_LATENCY_VALUE(1));
}

static bool psr_interrupt_error_check(struct intel_dp *intel_dp)
@@ -1289,6 +1297,13 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
DIS_RAM_BYPASS_PSR2_MAN_TRACK, 0);

+ /* Wa_16011168373:adlp */
+ if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_A0) &&
+ intel_dp->psr.psr2_enabled)
+ intel_de_rmw(dev_priv,
+ TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
+ TRANS_SET_CONTEXT_LATENCY_MASK, 0);
+
/* Disable PSR on Sink */
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, 0);

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4a98e49c58812..568e5f108e2c4 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -10368,6 +10368,14 @@ enum skl_power_gate {
#define TRANS_MSA_MISC(tran) _MMIO_TRANS2(tran, _TRANSA_MSA_MISC)
/* See DP_MSA_MISC_* for the bit definitions */

+#define _TRANS_A_SET_CONTEXT_LATENCY 0x6007C
+#define _TRANS_B_SET_CONTEXT_LATENCY 0x6107C
+#define _TRANS_C_SET_CONTEXT_LATENCY 0x6207C
+#define _TRANS_D_SET_CONTEXT_LATENCY 0x6307C
+#define TRANS_SET_CONTEXT_LATENCY(tran) _MMIO_TRANS2(tran, _TRANS_A_SET_CONTEXT_LATENCY)
+#define TRANS_SET_CONTEXT_LATENCY_MASK REG_GENMASK(15, 0)
+#define TRANS_SET_CONTEXT_LATENCY_VALUE(x) REG_FIELD_PREP(TRANS_SET_CONTEXT_LATENCY_MASK, (x))
+
/* LCPLL Control */
#define LCPLL_CTL _MMIO(0x130040)
#define LCPLL_PLL_DISABLE (1 << 31)
--
2.32.0