drm/amd/amdgpu: workaround for the imu fw loading

workaournd for the imu fw loading on gfx 12.0 without psp

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/imu_v12_0.c b/drivers/gpu/drm/amd/amdgpu/imu_v12_0.c
index be140ee..7112e4b 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/imu_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/imu_v12_0.c
@@ -143,6 +143,11 @@ static void imu_v12_0_setup(struct amdgpu_device *adev)
                imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_16);
                imu_reg_val |= 0x1;
                WREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_16, imu_reg_val);
+
+               imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_SCRATCH_10);
+               imu_reg_val |= 0x20010007;
+               WREG32_SOC15(GC, 0, regGFX_IMU_SCRATCH_10, imu_reg_val);
+
        }
 }