From: Huang Rui <ray.huang@xxxxxxx>
Add the functions to enable dynamic powergating.
Signed-off-by: Huang Rui <ray.huang at amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 3d24e50..e4825a3 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -669,6 +669,27 @@ static int sdma_v4_0_gfx_resume(struct amdgpu_device *adev)
return 0;
}
+static void
+sdma_v4_1_update_power_gating(struct amdgpu_device *adev, bool enable)
+{
+ uint32_t def, data;
+
+ if (enable && (adev->pg_flags & AMD_PG_SUPPORT_SDMA)) {
+ /* disable idle interrupt */
+ def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL));
+ data |= SDMA0_CNTL__CTXEMPTY_INT_ENABLE_MASK;
+
+ if (data != def)
+ WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL), data);
+ } else {
+ /* disable idle interrupt */
+ def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL));
+ data &= ~SDMA0_CNTL__CTXEMPTY_INT_ENABLE_MASK;
+ if (data != def)
+ WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL), data);
+ }
+}
+
static void sdma_v4_1_init_power_gating(struct amdgpu_device *adev)
{
uint32_t def, data;
@@ -704,6 +725,7 @@ static void sdma_v4_0_init_pg(struct amdgpu_device *adev)
switch (adev->asic_type) {
case CHIP_RAVEN:
sdma_v4_1_init_power_gating(adev);
+ sdma_v4_1_update_power_gating(adev, true);
break;
default:
break;
@@ -1502,6 +1524,17 @@ static int sdma_v4_0_set_clockgating_state(void *handle,
static int sdma_v4_0_set_powergating_state(void *handle,
enum amd_powergating_state state)
{
+ struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+ switch (adev->asic_type) {
+ case CHIP_RAVEN:
+ sdma_v4_1_update_power_gating(adev,
+ state == AMD_PG_STATE_GATE ? true : false);
+ break;
+ default:
+ break;
+ }
+
return 0;
}
--
2.5.5
