linux-kernel - [148/165] drm/radeon/cayman: setup hdp to invalidate and flush when

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Date:	Wed, 01 Jun 2011 17:11:58 +0900
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Dave Airlie <airlied@...hat.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [148/165] drm/radeon/cayman: setup hdp to invalidate and flush when

2.6.39-stable review patch.  If anyone has any objections, please let us know.

------------------
 asked
Content-Length: 1243
Lines: 41

From: Dave Airlie <airlied@...hat.com>

commit 0b65f83f9d2fab47b9b6040fe75fc2cfc73032d4 upstream.

On cayman we need to set the bit to cause HDP flushes to invalidate the
HDP cache also.

Reviewed-by: Alex Deucher <alexdeucher@...il.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/radeon/ni.c  |    4 ++++
 drivers/gpu/drm/radeon/nid.h |    2 ++
 2 files changed, 6 insertions(+)

--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -931,6 +931,10 @@ static void cayman_gpu_init(struct radeo
 	WREG32(CB_PERF_CTR3_SEL_0, 0);
 	WREG32(CB_PERF_CTR3_SEL_1, 0);
 
+	tmp = RREG32(HDP_MISC_CNTL);
+	tmp |= HDP_FLUSH_INVALIDATE_CACHE;
+	WREG32(HDP_MISC_CNTL, tmp);
+
 	hdp_host_path_cntl = RREG32(HDP_HOST_PATH_CNTL);
 	WREG32(HDP_HOST_PATH_CNTL, hdp_host_path_cntl);
 
--- a/drivers/gpu/drm/radeon/nid.h
+++ b/drivers/gpu/drm/radeon/nid.h
@@ -136,6 +136,8 @@
 #define	HDP_NONSURFACE_INFO				0x2C08
 #define	HDP_NONSURFACE_SIZE				0x2C0C
 #define HDP_ADDR_CONFIG  				0x2F48
+#define HDP_MISC_CNTL					0x2F4C
+#define 	HDP_FLUSH_INVALIDATE_CACHE			(1 << 0)
 
 #define	CC_SYS_RB_BACKEND_DISABLE			0x3F88
 #define	GC_USER_SYS_RB_BACKEND_DISABLE			0x3F8C


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