This is a note to let you know that I've just added the patch titled
drm/radeon/cayman: setup hdp to invalidate and flush when
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-cayman-setup-hdp-to-invalidate-and-flush-when.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0b65f83f9d2fab47b9b6040fe75fc2cfc73032d4 Mon Sep 17 00:00:00 2001
From: Dave Airlie <[email protected]>
Date: Thu, 19 May 2011 14:14:42 +1000
Subject: drm/radeon/cayman: setup hdp to invalidate and flush when
asked
From: Dave Airlie <[email protected]>
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 <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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
Patches currently in stable-queue which might be from [email protected] are
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