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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Subject: [PATCH 4/5] drm/i915: implement WADP0ClockGatingDisable
Date: Mon, 29 Oct 2012 23:23:35 +0100
Message-ID: <1351549416-2824-4-git-send-email-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <1351549416-2824-1-git-send-email-daniel.vetter@ffwll.ch>

Found in Bspec vol4h South Display Engine Registers [CPT, PPT],
section "5.3.1  TRANS_CHICKEN_1—Transcoder Chicken Bits 1"

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_reg.h | 4 ++++
 drivers/gpu/drm/i915/intel_pm.c | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f1fe3a0..14851ab 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3803,6 +3803,10 @@
 #define  TRANS_6BPC             (2<<5)
 #define  TRANS_12BPC            (3<<5)
 
+#define _TRANSA_CHICKEN1	 0xf0060
+#define _TRANSB_CHICKEN1	 0xf1060
+#define TRANS_CHICKEN1(pipe) _PIPE(pipe, _TRANSA_CHICKEN1, _TRANSB_CHICKEN1)
+#define  TRANS_CHICKEN1_DP0UNIT_GC_DISABLE	(1<<4)
 #define _TRANSA_CHICKEN2	 0xf0064
 #define _TRANSB_CHICKEN2	 0xf1064
 #define TRANS_CHICKEN2(pipe) _PIPE(pipe, _TRANSA_CHICKEN2, _TRANSB_CHICKEN2)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 3469fbd..1d96c1f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3795,6 +3795,11 @@ static void cpt_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
 	I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
 		   DPLS_EDP_PPS_FIX_DIS);
+	/* WADP0ClockGatingDisable */
+	for_each_pipe(pipe) {
+		I915_WRITE(TRANS_CHICKEN1(pipe),
+			   TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
+	}
 }
 
 void intel_init_clock_gating(struct drm_device *dev)
-- 
1.7.11.4

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  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-29 22:23 [PATCH 1/5] drm/i915: check whether the pch is the soulmate of the cpu Daniel Vetter
2012-10-29 22:23 ` [PATCH 2/5] drm/i915: drop unnecessary check from fdi_link_train code Daniel Vetter
2012-10-31 17:27   ` Paulo Zanoni
2012-10-29 22:23 ` [PATCH 3/5] drm/i915: CPT/PPT pch dp transcoder workaround Daniel Vetter
2012-10-29 22:23 ` Daniel Vetter [this message]
2012-10-31 17:46   ` [PATCH 4/5] drm/i915: implement WADP0ClockGatingDisable Paulo Zanoni
2012-10-29 22:23 ` [PATCH 5/5] drm/i915: kill pch_init_clock_gating indirection Daniel Vetter
2012-10-31 17:52   ` Paulo Zanoni
2012-10-31 17:31 ` [PATCH 1/5] drm/i915: check whether the pch is the soulmate of the cpu Paulo Zanoni
2012-10-31 21:52 [PATCH 0/5] ivb fdi b/c fixes Daniel Vetter
2012-10-31 21:52 ` [PATCH 4/5] drm/i915: implement WADP0ClockGatingDisable Daniel Vetter
2012-11-01 16:18   ` Paulo Zanoni

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