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drm/amdgpu/sdma4: add dynamic power gating for raven

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Add the functions to enable dynamic powergating.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Huang Rui 2017-02-28 16:13:32 +08:00 committed by Alex Deucher
parent db3144029c
commit 13cfe5d076
1 changed files with 33 additions and 0 deletions
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33
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
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@ -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;
}