drm/radeon/uvd: use lower clocks on old UVD to boot v2

commit e45187620f9fc103edf68fa5ea78e73033e1668c upstream.

Some RV7xx generation hardware crashes after you
raise the UVD clocks for the first time. Try to
avoid this by using the lower clocks to boot these.

Workaround for: https://bugzilla.kernel.org/show_bug.cgi?id=71891

v2: lower clocks on IB test as well

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/radeon/uvd_v1_0.c b/drivers/gpu/drm/radeon/uvd_v1_0.c
index d4a68af..c310a0a 100644 (file)
--- a/drivers/gpu/drm/radeon/uvd_v1_0.c
+++ b/drivers/gpu/drm/radeon/uvd_v1_0.c
@@ -83,7 +83,10 @@ int uvd_v1_0_init(struct radeon_device *rdev)
        int r;
 
        /* raise clocks while booting up the VCPU */
-       radeon_set_uvd_clocks(rdev, 53300, 40000);
+       if (rdev->family < CHIP_RV740)
+               radeon_set_uvd_clocks(rdev, 10000, 10000);
+       else
+               radeon_set_uvd_clocks(rdev, 53300, 40000);
 
        r = uvd_v1_0_start(rdev);
        if (r)
@@ -407,7 +410,10 @@ int uvd_v1_0_ib_test(struct radeon_device *rdev, struct radeon_ring *ring)
        struct radeon_fence *fence = NULL;
        int r;
 
-       r = radeon_set_uvd_clocks(rdev, 53300, 40000);
+       if (rdev->family < CHIP_RV740)
+               r = radeon_set_uvd_clocks(rdev, 10000, 10000);
+       else
+               r = radeon_set_uvd_clocks(rdev, 53300, 40000);
        if (r) {
                DRM_ERROR("radeon: failed to raise UVD clocks (%d).\n", r);
                return r;