[PATCH] drm/radeon: soft reset uvd on RV770 uvd init

[Alex Deucher]

Fixes avoids and error message on boot which is harmless,
but confusing to users.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/uvd_v1_0.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/radeon/uvd_v1_0.c b/drivers/gpu/drm/radeon/uvd_v1_0.c
index e251624..82e4fa6 100644
--- a/drivers/gpu/drm/radeon/uvd_v1_0.c
+++ b/drivers/gpu/drm/radeon/uvd_v1_0.c
@@ -325,6 +325,13 @@ int uvd_v1_0_start(struct radeon_device *rdev)
 
 	WREG32_P(UVD_RB_ARB_CTRL, 0, ~(1 << 3));
 
+	if (rdev->family == CHIP_RV770) {
+		WREG32_P(UVD_SOFT_RESET, VCPU_SOFT_RESET, ~VCPU_SOFT_RESET);
+		mdelay(10);
+		WREG32_P(UVD_SOFT_RESET, 0, ~VCPU_SOFT_RESET);
+		mdelay(10);
+	}
+
 	for (i = 0; i < 10; ++i) {
 		uint32_t status;
 		for (j = 0; j < 100; ++j) {
-- 
1.8.3.1