From 0f2c76ad2bd88f3c9403acc6bc7362f7bdcc0b43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= <jose.souza@intel.com>
Date: Tue, 14 Sep 2021 14:25:07 -0700
Subject: drm/i915/display/adlp: Add new PSR2 workarounds
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: 641dd82ffa9daad38f630d9f4a36e4875fd4e0c6
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Wa_16014451276 fixes the starting coordinate for PSR2 selective
updates. CHICKEN_TRANS definition of the workaround bit has a wrong
name based on workaround definition and HSD.
Wa_14014971508 allows the screen to continue to be updated when
coming back from DC5/DC6 and SF_SINGLE_FULL_FRAME bit is not kept
set in PSR2_MAN_TRK_CTL.
Wa_16012604467 fixes underruns when exiting PSR2 when it is in one
of its internal states.
Wa_14014971508 is still in pending status in BSpec but by
the time this is reviewed and ready to be merged it will be finalized.
v2:
- renamed register to ADLP_1_BASED_X_GRANULARITY
- added comment about all ADL-P supported panels being 1 based X
granularity
BSpec: 54369
BSpec: 50054
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210914212507.177511-5-jose.souza@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_psr.c | 27 +++++++++++++++++++++++-
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
2 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 5a1535e11e6b..c1894b056d6c 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1087,6 +1087,16 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
intel_de_write(dev_priv, reg, chicken);
}
+ /*
+ * Wa_16014451276:adlp
+ * All supported adlp panels have 1-based X granularity, this may
+ * cause issues if non-supported panels are used.
+ */
+ if (IS_ALDERLAKE_P(dev_priv) &&
+ intel_dp->psr.psr2_enabled)
+ intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
+ ADLP_1_BASED_X_GRANULARITY);
+
/*
* Per Spec: Avoid continuous PSR exit by masking MEMUP and HPD also
* mask LPSP to avoid dependency on other drivers that might block
@@ -1132,6 +1142,11 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
TRANS_SET_CONTEXT_LATENCY_MASK,
TRANS_SET_CONTEXT_LATENCY_VALUE(1));
+
+ /* Wa_16012604467:adlp */
+ if (IS_ALDERLAKE_P(dev_priv) && intel_dp->psr.psr2_enabled)
+ intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0,
+ CLKGATE_DIS_MISC_DMASC_GATING_DIS);
}
static bool psr_interrupt_error_check(struct intel_dp *intel_dp)
@@ -1321,6 +1336,11 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
TRANS_SET_CONTEXT_LATENCY_MASK, 0);
+ /* Wa_16012604467:adlp */
+ if (IS_ALDERLAKE_P(dev_priv) && intel_dp->psr.psr2_enabled)
+ intel_de_rmw(dev_priv, CLKGATE_DIS_MISC,
+ CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
+
intel_snps_phy_update_psr_power_state(dev_priv, phy, false);
/* Disable PSR on Sink */
@@ -1489,8 +1509,13 @@ static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
u32 val = PSR2_MAN_TRK_CTL_ENABLE;
if (full_update) {
+ /*
+ * Wa_14014971508:adlp
+ * SINGLE_FULL_FRAME bit is not hold in register so can not be
+ * restored by DMC, so using CONTINUOS_FULL_FRAME to mimic that
+ */
if (IS_ALDERLAKE_P(dev_priv))
- val |= ADLP_PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
+ val |= ADLP_PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME;
else
val |= PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c8de2b4c6a9b..27d82985a319 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8210,6 +8210,7 @@ enum {
#define VSC_DATA_SEL_SOFTWARE_CONTROL REG_BIT(25) /* GLK */
#define FECSTALL_DIS_DPTSTREAM_DPTTG REG_BIT(23)
#define DDI_TRAINING_OVERRIDE_ENABLE REG_BIT(19)
+#define ADLP_1_BASED_X_GRANULARITY REG_BIT(18)
#define DDI_TRAINING_OVERRIDE_VALUE REG_BIT(18)
#define DDIE_TRAINING_OVERRIDE_ENABLE REG_BIT(17) /* CHICKEN_TRANS_A only */
#define DDIE_TRAINING_OVERRIDE_VALUE REG_BIT(16) /* CHICKEN_TRANS_A only */
@@ -12756,4 +12757,7 @@ enum skl_power_gate {
#define CLKREQ_POLICY _MMIO(0x101038)
#define CLKREQ_POLICY_MEM_UP_OVRD REG_BIT(1)
+#define CLKGATE_DIS_MISC _MMIO(0x46534)
+#define CLKGATE_DIS_MISC_DMASC_GATING_DIS REG_BIT(21)
+
#endif /* _I915_REG_H_ */
--
2.38.1