---
 drivers/gpu/drm/amd/amdgpu/si.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c
index 153db3f763bc..f1c33395e3fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/si.c
+++ b/drivers/gpu/drm/amd/amdgpu/si.c
@@ -973,6 +973,28 @@ static void si_smc_wreg(struct amdgpu_device *adev, u32 
reg, u32 v)
        spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
 }
 
+static u32 si_uvd_ctx_rreg(struct amdgpu_device *adev, u32 reg)
+{
+       unsigned long flags;
+       u32 r;
+
+       spin_lock_irqsave(&adev->uvd_ctx_idx_lock, flags);
+       WREG32(mmUVD_CTX_INDEX, ((reg) & 0x1ff));
+       r = RREG32(mmUVD_CTX_DATA);
+       spin_unlock_irqrestore(&adev->uvd_ctx_idx_lock, flags);
+       return r;
+}
+
+static void si_uvd_ctx_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&adev->uvd_ctx_idx_lock, flags);
+       WREG32(mmUVD_CTX_INDEX, ((reg) & 0x1ff));
+       WREG32(mmUVD_CTX_DATA, (v));
+       spin_unlock_irqrestore(&adev->uvd_ctx_idx_lock, flags);
+}
+
 static struct amdgpu_allowed_register_entry si_allowed_read_registers[] = {
        {GRBM_STATUS},
        {mmGRBM_STATUS2},
@@ -1443,8 +1465,8 @@ static int si_common_early_init(void *handle)
        adev->pcie_wreg = &si_pcie_wreg;
        adev->pciep_rreg = &si_pciep_rreg;
        adev->pciep_wreg = &si_pciep_wreg;
-       adev->uvd_ctx_rreg = NULL;
-       adev->uvd_ctx_wreg = NULL;
+       adev->uvd_ctx_rreg = si_uvd_ctx_rreg;
+       adev->uvd_ctx_wreg = si_uvd_ctx_wreg;
        adev->didt_rreg = NULL;
        adev->didt_wreg = NULL;
 
-- 
2.25.1

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