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drm/amdgpu/gfx9: enable/disable sck slowdown thru rlc-smu handshake

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Required for proper powergating operation.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hawking Zhang 2017-02-10 15:36:34 +08:00 committed by Alex Deucher
parent 91d3130a4d
commit ed5ad1e40e
1 changed files with 45 additions and 0 deletions
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45
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
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@ -1903,6 +1903,44 @@ static void gfx_v9_0_init_gfx_power_gating(struct amdgpu_device *adev)
}
}
static void gfx_v9_0_enable_sck_slow_down_on_power_up(struct amdgpu_device *adev,
bool enable)
{
uint32_t data = 0;
uint32_t default_data = 0;
default_data = data = RREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL));
if (enable == true) {
data |= RLC_PG_CNTL__SMU_CLK_SLOWDOWN_ON_PU_ENABLE_MASK;
if (default_data != data)
WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
} else {
data &= ~RLC_PG_CNTL__SMU_CLK_SLOWDOWN_ON_PU_ENABLE_MASK;
if(default_data != data)
WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
}
}
static void gfx_v9_0_enable_sck_slow_down_on_power_down(struct amdgpu_device *adev,
bool enable)
{
uint32_t data = 0;
uint32_t default_data = 0;
default_data = data = RREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL));
if (enable == true) {
data |= RLC_PG_CNTL__SMU_CLK_SLOWDOWN_ON_PD_ENABLE_MASK;
if(default_data != data)
WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
} else {
data &= ~RLC_PG_CNTL__SMU_CLK_SLOWDOWN_ON_PD_ENABLE_MASK;
if(default_data != data)
WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
}
}
static void gfx_v9_0_init_pg(struct amdgpu_device *adev)
{
if (adev->pg_flags & (AMD_PG_SUPPORT_GFX_PG |
@ -1919,6 +1957,13 @@ static void gfx_v9_0_init_pg(struct amdgpu_device *adev)
WREG32(mmRLC_JUMP_TABLE_RESTORE,
adev->gfx.rlc.cp_table_gpu_addr >> 8);
gfx_v9_0_init_gfx_power_gating(adev);
if (adev->pg_flags & AMD_PG_SUPPORT_RLC_SMU_HS) {
gfx_v9_0_enable_sck_slow_down_on_power_up(adev, true);
gfx_v9_0_enable_sck_slow_down_on_power_down(adev, true);
} else {
gfx_v9_0_enable_sck_slow_down_on_power_up(adev, false);
gfx_v9_0_enable_sck_slow_down_on_power_down(adev, false);
}
}
}
}