drm/amdgpu: add bypass mode for vce3.0

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Eric Huang <JinhuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
index 559209b..800c10b 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
@@ -655,6 +655,18 @@ static int vce_v3_0_process_interrupt(struct amdgpu_device *adev,
        return 0;
 }
 
+static void vce_v3_set_bypass_mode(struct amdgpu_device *adev, bool enable)
+{
+       u32 tmp = RREG32_SMC(ixGCK_DFS_BYPASS_CNTL);
+
+       if (enable)
+               tmp |= GCK_DFS_BYPASS_CNTL__BYPASSECLK_MASK;
+       else
+               tmp &= ~GCK_DFS_BYPASS_CNTL__BYPASSECLK_MASK;
+
+       WREG32_SMC(ixGCK_DFS_BYPASS_CNTL, tmp);
+}
+
 static int vce_v3_0_set_clockgating_state(void *handle,
                                          enum amd_clockgating_state state)
 {
@@ -662,6 +674,9 @@ static int vce_v3_0_set_clockgating_state(void *handle,
        bool enable = (state == AMD_CG_STATE_GATE) ? true : false;
        int i;
 
+       if (adev->asic_type == CHIP_POLARIS10)
+               vce_v3_set_bypass_mode(adev, enable);
+
        if (!(adev->cg_flags & AMD_CG_SUPPORT_VCE_MGCG))
                return 0;