drm/radeon/kms/evergreen: reset the grbm blocks at resume and init

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>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 6ced1ba2bee8..7b337c361a12 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2583,6 +2583,11 @@ int evergreen_resume(struct radeon_device *rdev)
 {
         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.
@@ -2699,6 +2704,11 @@ int evergreen_init(struct radeon_device *rdev)
         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) {