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Subject[PATCH] [120/139] drm/radeon/kms/evergreen: reset the grbm blocks at resume and init
Date
2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Alex Deucher <alexdeucher@gmail.com>

commit 86f5c9edbb3bac37cc8cee6528a929005ba72aad upstream.

This fixes module reloading and resume as the gfx block seems to
be left in a bad state in some cases.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

---
drivers/gpu/drm/radeon/evergreen.c | 10 ++++++++++
1 file changed, 10 insertions(+)

Index: linux-2.6.35.y/drivers/gpu/drm/radeon/evergreen.c
===================================================================
--- linux-2.6.35.y.orig/drivers/gpu/drm/radeon/evergreen.c
+++ linux-2.6.35.y/drivers/gpu/drm/radeon/evergreen.c
@@ -2080,6 +2080,11 @@ int evergreen_resume(struct radeon_devic
{
int r;

+ /* reset the asic, the gfx blocks are often in a bad state
+ * after the driver is unloaded or after a resume
+ */
+ if (radeon_asic_reset(rdev))
+ dev_warn(rdev->dev, "GPU reset failed !\n");
/* Do not reset GPU before posting, on rv770 hw unlike on r500 hw,
* posting will perform necessary task to bring back GPU into good
* shape.
@@ -2181,6 +2186,11 @@ int evergreen_init(struct radeon_device
r = radeon_atombios_init(rdev);
if (r)
return r;
+ /* reset the asic, the gfx blocks are often in a bad state
+ * after the driver is unloaded or after a resume
+ */
+ if (radeon_asic_reset(rdev))
+ dev_warn(rdev->dev, "GPU reset failed !\n");
/* Post card if necessary */
if (!evergreen_card_posted(rdev)) {
if (!rdev->bios) {

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