This is a note to let you know that I've just added the patch titled
drm/radeon/kms: don't apply 7xx HDP flush workaround on AGP
to the 2.6.36-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-kms-don-t-apply-7xx-hdp-flush-workaround-on-agp.patch
and it can be found in the queue-2.6.36 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From f3886f85cfde578f1d0ba6e40ac5f9d70043923b Mon Sep 17 00:00:00 2001
From: Alex Deucher <[email protected]>
Date: Wed, 8 Dec 2010 10:05:34 -0500
Subject: drm/radeon/kms: don't apply 7xx HDP flush workaround on AGP
From: Alex Deucher <[email protected]>
commit f3886f85cfde578f1d0ba6e40ac5f9d70043923b upstream.
It should be required for all 7xx asics, but seems to cause
problems on some AGP 7xx chips.
Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=19002
Signed-off-by: Alex Deucher <[email protected]>
Reported-and-Tested-by: Duncan <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/radeon/r600.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -878,12 +878,15 @@ void r600_pcie_gart_tlb_flush(struct rad
u32 tmp;
/* flush hdp cache so updates hit vram */
- if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740)) {
+ if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740) &&
+ !(rdev->flags & RADEON_IS_AGP)) {
void __iomem *ptr = (void *)rdev->gart.table.vram.ptr;
u32 tmp;
/* r7xx hw bug. write to HDP_DEBUG1 followed by fb read
* rather than write to HDP_REG_COHERENCY_FLUSH_CNTL
+ * This seems to cause problems on some AGP cards. Just use the
old
+ * method for them.
*/
WREG32(HDP_DEBUG1, 0);
tmp = readl((void __iomem *)ptr);
@@ -3525,10 +3528,12 @@ int r600_debugfs_mc_info_init(struct rad
void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo)
{
/* r7xx hw bug. write to HDP_DEBUG1 followed by fb read
- * rather than write to HDP_REG_COHERENCY_FLUSH_CNTL
+ * rather than write to HDP_REG_COHERENCY_FLUSH_CNTL.
+ * This seems to cause problems on some AGP cards. Just use the old
+ * method for them.
*/
if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740) &&
- rdev->vram_scratch.ptr) {
+ rdev->vram_scratch.ptr && !(rdev->flags & RADEON_IS_AGP)) {
void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
u32 tmp;
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.36/drm-radeon-kms-don-t-apply-7xx-hdp-flush-workaround-on-agp.patch
queue-2.6.36/drm-radeon-kms-fix-vram-base-calculation-on-rs780-rs880.patch
queue-2.6.36/drm-kms-remove-spaces-from-connector-names-v2.patch
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