drm/amdgpu: add get_clockgating callback for soc15 (v3)
v2: squash register typo fix from Ray
v3: fix spelling
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 67f4a5a..990fde2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -55,7 +55,10 @@ static const struct cg_flag_name clocks[] = {
{AMD_CG_SUPPORT_VCE_MGCG, "Video Compression Engine Medium Grain Clock Gating"},
{AMD_CG_SUPPORT_HDP_LS, "Host Data Path Light Sleep"},
{AMD_CG_SUPPORT_HDP_MGCG, "Host Data Path Medium Grain Clock Gating"},
+ {AMD_CG_SUPPORT_DRM_MGCG, "Digital Right Management Medium Grain Clock Gating"},
+ {AMD_CG_SUPPORT_DRM_LS, "Digital Right Management Light Sleep"},
{AMD_CG_SUPPORT_ROM_MGCG, "Rom Medium Grain Clock Gating"},
+ {AMD_CG_SUPPORT_DF_MGCG, "Data Fabric Medium Grain Clock Gating"},
{0, NULL},
};
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 6286573..3c77b59 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -792,6 +792,42 @@ static int soc15_common_set_clockgating_state(void *handle,
return 0;
}
+static void soc15_common_get_clockgating_state(void *handle, u32 *flags)
+{
+ struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ int data;
+
+ if (amdgpu_sriov_vf(adev))
+ *flags = 0;
+
+ nbio_v6_1_get_clockgating_state(adev, flags);
+
+ /* AMD_CG_SUPPORT_HDP_LS */
+ data = RREG32(SOC15_REG_OFFSET(HDP, 0, mmHDP_MEM_POWER_LS));
+ if (data & HDP_MEM_POWER_LS__LS_ENABLE_MASK)
+ *flags |= AMD_CG_SUPPORT_HDP_LS;
+
+ /* AMD_CG_SUPPORT_DRM_MGCG */
+ data = RREG32(SOC15_REG_OFFSET(MP0, 0, mmMP0_MISC_CGTT_CTRL0));
+ if (!(data & 0x01000000))
+ *flags |= AMD_CG_SUPPORT_DRM_MGCG;
+
+ /* AMD_CG_SUPPORT_DRM_LS */
+ data = RREG32(SOC15_REG_OFFSET(MP0, 0, mmMP0_MISC_LIGHT_SLEEP_CTRL));
+ if (data & 0x1)
+ *flags |= AMD_CG_SUPPORT_DRM_LS;
+
+ /* AMD_CG_SUPPORT_ROM_MGCG */
+ data = RREG32(SOC15_REG_OFFSET(SMUIO, 0, mmCGTT_ROM_CLK_CTRL0));
+ if (!(data & CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK))
+ *flags |= AMD_CG_SUPPORT_ROM_MGCG;
+
+ /* AMD_CG_SUPPORT_DF_MGCG */
+ data = RREG32(SOC15_REG_OFFSET(DF, 0, mmDF_PIE_AON0_DfGlobalClkGater));
+ if (data & DF_MGCG_ENABLE_15_CYCLE_DELAY)
+ *flags |= AMD_CG_SUPPORT_DF_MGCG;
+}
+
static int soc15_common_set_powergating_state(void *handle,
enum amd_powergating_state state)
{
@@ -814,4 +850,5 @@ const struct amd_ip_funcs soc15_common_ip_funcs = {
.soft_reset = soc15_common_soft_reset,
.set_clockgating_state = soc15_common_set_clockgating_state,
.set_powergating_state = soc15_common_set_powergating_state,
+ .get_clockgating_state= soc15_common_get_clockgating_state,
};