From: deepak.s@linux.intel.com
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH v3] drm/i915/chv: Implement WaDisableShadowRegForCpd
Date: Wed, 15 Apr 2015 19:41:39 +0530 [thread overview]
Message-ID: <1429107099-6992-1-git-send-email-deepak.s@linux.intel.com> (raw)
In-Reply-To: <552E69FD.60005@linux.intel.com>
From: Deepak S <deepak.s@linux.intel.com>
This WA is avoid problem between shadow vs wake FIFO unload
problem during CPD/RC6 transactions on CHV.
v2: Define individual bits GTFIFOCTL (Ville)
v3: move WA to uncore_early_sanitize (ville)
Signed-off-by: Deepak S <deepak.s@linux.intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 2 ++
drivers/gpu/drm/i915/intel_uncore.c | 8 ++++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9c97842..a642a58 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6206,6 +6206,8 @@ enum skl_disp_power_wells {
#define GTFIFOCTL 0x120008
#define GT_FIFO_FREE_ENTRIES_MASK 0x7f
#define GT_FIFO_NUM_RESERVED_ENTRIES 20
+#define GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL (1 << 12)
+#define GT_FIFO_CTL_RC6_POLICY_STALL (1 << 11)
#define HSW_IDICR 0x9008
#define IDIHASHMSK(x) (((x) & 0x3f) << 16)
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index d96d15f..26d6dda 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -360,6 +360,14 @@ static void __intel_uncore_early_sanitize(struct drm_device *dev,
__raw_i915_write32(dev_priv, GTFIFODBG,
__raw_i915_read32(dev_priv, GTFIFODBG));
+ /* WaDisableShadowRegForCpd */
+ if (IS_CHERRYVIEW(dev)) {
+ __raw_i915_write32(dev_priv, GTFIFOCTL,
+ __raw_i915_read32(dev_priv, GTFIFOCTL) |
+ GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
+ GT_FIFO_CTL_RC6_POLICY_STALL);
+ }
+
intel_uncore_forcewake_reset(dev, restore_forcewake);
}
--
1.9.1
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next prev parent reply other threads:[~2015-04-15 14:14 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-14 10:28 [PATCH] drm/i915/chv: Implement WaDisableShadowRegForCpd deepak.s
2015-04-14 10:59 ` Ville Syrjälä
2015-04-15 8:02 ` Deepak S
2015-04-15 8:46 ` [PATCH v2] " deepak.s
2015-04-15 11:18 ` Ville Syrjälä
2015-04-15 13:39 ` Deepak S
2015-04-15 14:11 ` deepak.s [this message]
2015-04-15 18:39 ` [PATCH v3] " Ville Syrjälä
2015-04-16 3:19 ` Deepak S
2015-04-16 3:21 ` [PATCH v4] " deepak.s
2015-04-16 21:05 ` shuang.he
2015-04-28 14:41 ` Jani Nikula
2015-04-16 2:36 ` [PATCH v3] " shuang.he
2015-04-15 18:19 ` [PATCH v2] " shuang.he
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