From 601138487a14924c7ddb3747c010ca4a404eb6f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= <jose.souza@intel.com>
Date: Wed, 3 Jun 2020 14:15:28 -0700
Subject: drm/i915/rkl: Disable PSR2
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Git-commit: 24d2fc3d530e779c0a7a3dc00d58746cba93e5c8
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
RKL doesn't have PSR2 HW tracking, it was replaced by software/manual
tracking. The driver is required to track the areas that needs update
and program hardware to send selective updates.
So until the software tracking is implemented, PSR2 needs to be disabled
for platforms without PSR2 HW tracking.
BSpec: 50422
BSpec: 50424
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200603211529.3005059-15-matthew.d.roper@intel.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_psr.c | 15 +++++++++++++++
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/i915_pci.c | 3 +++
drivers/gpu/drm/i915/intel_device_info.h | 1 +
4 files changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index b7a2c102648a..714c590b39f5 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -646,6 +646,21 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
return false;
}
+ /*
+ * Some platforms lack PSR2 HW tracking and instead require manual
+ * tracking by software. In this case, the driver is required to track
+ * the areas that need updates and program hardware to send selective
+ * updates.
+ *
+ * So until the software tracking is implemented, PSR2 needs to be
+ * disabled for platforms without PSR2 HW tracking.
+ */
+ if (!HAS_PSR_HW_TRACKING(dev_priv)) {
+ drm_dbg_kms(&dev_priv->drm,
+ "No PSR2 HW tracking in the platform\n");
+ return false;
+ }
+
/*
* DSC and PSR2 cannot be enabled simultaneously. If a requested
* resolution requires DSC to be enabled, priority is given to DSC
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 171c39f54f85..0610d2c62a4d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1647,6 +1647,8 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
#define HAS_DDI(dev_priv) (INTEL_INFO(dev_priv)->display.has_ddi)
#define HAS_FPGA_DBG_UNCLAIMED(dev_priv) (INTEL_INFO(dev_priv)->has_fpga_dbg)
#define HAS_PSR(dev_priv) (INTEL_INFO(dev_priv)->display.has_psr)
+#define HAS_PSR_HW_TRACKING(dev_priv) \
+ (INTEL_INFO(dev_priv)->display.has_psr_hw_tracking)
#define HAS_TRANSCODER(dev_priv, trans) ((INTEL_INFO(dev_priv)->cpu_transcoder_mask & BIT(trans)) != 0)
#define HAS_RC6(dev_priv) (INTEL_INFO(dev_priv)->has_rc6)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 7829cda3033f..192f1cd172b8 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -536,6 +536,7 @@ static const struct intel_device_info vlv_info = {
.display.has_ddi = 1, \
.has_fpga_dbg = 1, \
.display.has_psr = 1, \
+ .display.has_psr_hw_tracking = 1, \
.display.has_dp_mst = 1, \
.has_rc6p = 0 /* RC6p removed-by HSW */, \
HSW_PIPE_OFFSETS, \
@@ -690,6 +691,7 @@ static const struct intel_device_info skl_gt4_info = {
.display.has_fbc = 1, \
.display.has_hdcp = 1, \
.display.has_psr = 1, \
+ .display.has_psr_hw_tracking = 1, \
.has_runtime_pm = 1, \
.display.has_csr = 1, \
.has_rc6 = 1, \
@@ -884,6 +886,7 @@ static const struct intel_device_info rkl_info = {
.cpu_transcoder_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
BIT(TRANSCODER_C),
.require_force_probe = 1,
+ .display.has_psr_hw_tracking = 0,
.engine_mask =
BIT(RCS0) | BIT(BCS0) | BIT(VECS0) | BIT(VCS0),
};
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 3613c04904e0..34dbffd65bad 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -148,6 +148,7 @@ enum intel_ppgtt_type {
func(has_modular_fia); \
func(has_overlay); \
func(has_psr); \
+ func(has_psr_hw_tracking); \
func(overlay_needs_physical); \
func(supports_tv);
--
2.29.2