From: Huang Rui <[email protected]> Add the functions to enable dynamic powergating.
Signed-off-by: Huang Rui <[email protected]> Reviewed-by: Hawking Zhang <[email protected]> Reviewed-by: Alex Deucher <[email protected]> Signed-off-by: Alex Deucher <[email protected]> --- 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 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
