drm/amd/powerplay: Add read_sensor() callback to hwmgr (v3)

Provides standardized interface to read various sensors.
The API is extensible (by adding to the end of the
amd_pp_sensors enumeration list.

Support has been added to Carrizo/smu7

(v2) Squashed the two sensor patches into one.
(v3) Updated to apply to smu7_hwmgr instead

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 132 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
index 5ecef1732e20..9f3c5a8a903c 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
@@ -1857,6 +1857,101 @@ static int cz_get_max_high_clocks(struct pp_hwmgr *hwmgr, struct amd_pp_simple_c
 	return 0;
 }
 
+static int cz_read_sensor(struct pp_hwmgr *hwmgr, int idx, int32_t *value)
+{
+	struct cz_hwmgr *cz_hwmgr = (struct cz_hwmgr *)(hwmgr->backend);
+
+	struct phm_clock_voltage_dependency_table *table =
+				hwmgr->dyn_state.vddc_dependency_on_sclk;
+
+	struct phm_vce_clock_voltage_dependency_table *vce_table =
+		hwmgr->dyn_state.vce_clock_voltage_dependency_table;
+
+	struct phm_uvd_clock_voltage_dependency_table *uvd_table =
+		hwmgr->dyn_state.uvd_clock_voltage_dependency_table;
+
+	uint32_t sclk_index = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixTARGET_AND_CURRENT_PROFILE_INDEX),
+					TARGET_AND_CURRENT_PROFILE_INDEX, CURR_SCLK_INDEX);
+	uint32_t uvd_index = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixTARGET_AND_CURRENT_PROFILE_INDEX_2),
+					TARGET_AND_CURRENT_PROFILE_INDEX_2, CURR_UVD_INDEX);
+	uint32_t vce_index = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixTARGET_AND_CURRENT_PROFILE_INDEX_2),
+					TARGET_AND_CURRENT_PROFILE_INDEX_2, CURR_VCE_INDEX);
+
+	uint32_t sclk, vclk, dclk, ecclk, tmp, activity_percent;
+	uint16_t vddnb, vddgfx;
+	int result;
+
+	switch (idx) {
+	case AMDGPU_PP_SENSOR_GFX_SCLK:
+		if (sclk_index < NUM_SCLK_LEVELS) {
+			sclk = table->entries[sclk_index].clk;
+			*value = sclk;
+			return 0;
+		}
+		return -EINVAL;
+	case AMDGPU_PP_SENSOR_VDDNB:
+		tmp = (cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixSMUSVI_NB_CURRENTVID) &
+			CURRENT_NB_VID_MASK) >> CURRENT_NB_VID__SHIFT;
+		vddnb = cz_convert_8Bit_index_to_voltage(hwmgr, tmp);
+		*value = vddnb;
+		return 0;
+	case AMDGPU_PP_SENSOR_VDDGFX:
+		tmp = (cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixSMUSVI_GFX_CURRENTVID) &
+			CURRENT_GFX_VID_MASK) >> CURRENT_GFX_VID__SHIFT;
+		vddgfx = cz_convert_8Bit_index_to_voltage(hwmgr, (u16)tmp);
+		*value = vddgfx;
+		return 0;
+	case AMDGPU_PP_SENSOR_UVD_VCLK:
+		if (!cz_hwmgr->uvd_power_gated) {
+			if (uvd_index >= CZ_MAX_HARDWARE_POWERLEVELS) {
+				return -EINVAL;
+			} else {
+				vclk = uvd_table->entries[uvd_index].vclk;
+				*value = vclk;
+				return 0;
+			}
+		}
+		*value = 0;
+		return 0;
+	case AMDGPU_PP_SENSOR_UVD_DCLK:
+		if (!cz_hwmgr->uvd_power_gated) {
+			if (uvd_index >= CZ_MAX_HARDWARE_POWERLEVELS) {
+				return -EINVAL;
+			} else {
+				dclk = uvd_table->entries[uvd_index].dclk;
+				*value = dclk;
+				return 0;
+			}
+		}
+		*value = 0;
+		return 0;
+	case AMDGPU_PP_SENSOR_VCE_ECCLK:
+		if (!cz_hwmgr->vce_power_gated) {
+			if (vce_index >= CZ_MAX_HARDWARE_POWERLEVELS) {
+				return -EINVAL;
+			} else {
+				ecclk = vce_table->entries[vce_index].ecclk;
+				*value = ecclk;
+				return 0;
+			}
+		}
+		*value = 0;
+		return 0;
+	case AMDGPU_PP_SENSOR_GPU_LOAD:
+		result = smum_send_msg_to_smc(hwmgr->smumgr, PPSMC_MSG_GetAverageGraphicsActivity);
+		if (0 == result) {
+			activity_percent = cgs_read_register(hwmgr->device, mmSMU_MP1_SRBM2P_ARG_0);
+			activity_percent = activity_percent > 100 ? 100 : activity_percent;
+		} else {
+			activity_percent = 50;
+		}
+		*value = activity_percent;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
 static const struct pp_hwmgr_func cz_hwmgr_funcs = {
 	.backend_init = cz_hwmgr_backend_init,
 	.backend_fini = cz_hwmgr_backend_fini,
@@ -1882,6 +1977,7 @@ static const struct pp_hwmgr_func cz_hwmgr_funcs = {
 	.get_current_shallow_sleep_clocks = cz_get_current_shallow_sleep_clocks,
 	.get_clock_by_type = cz_get_clock_by_type,
 	.get_max_high_clocks = cz_get_max_high_clocks,
+	.read_sensor = cz_read_sensor,
 };
 
 int cz_hwmgr_init(struct pp_hwmgr *hwmgr)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index f67e1e260b30..07a7d046d6f6 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -3144,6 +3144,41 @@ smu7_print_current_perforce_level(struct pp_hwmgr *hwmgr, struct seq_file *m)
 	seq_printf(m, "vce    %sabled\n", data->vce_power_gated ? "dis" : "en");
 }
 
+static int smu7_read_sensor(struct pp_hwmgr *hwmgr, int idx, int32_t *value)
+{
+	uint32_t sclk, mclk, activity_percent;
+	uint32_t offset;
+	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
+
+	switch (idx) {
+	case AMDGPU_PP_SENSOR_GFX_SCLK:
+		smum_send_msg_to_smc(hwmgr->smumgr, PPSMC_MSG_API_GetSclkFrequency);
+		sclk = cgs_read_register(hwmgr->device, mmSMC_MSG_ARG_0);
+		*value = sclk;
+		return 0;
+	case AMDGPU_PP_SENSOR_GFX_MCLK:
+		smum_send_msg_to_smc(hwmgr->smumgr, PPSMC_MSG_API_GetMclkFrequency);
+		mclk = cgs_read_register(hwmgr->device, mmSMC_MSG_ARG_0);
+		*value = mclk;
+		return 0;
+	case AMDGPU_PP_SENSOR_GPU_LOAD:
+		offset = data->soft_regs_start + smum_get_offsetof(hwmgr->smumgr,
+								SMU_SoftRegisters,
+								AverageGraphicsActivity);
+
+		activity_percent = cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, offset);
+		activity_percent += 0x80;
+		activity_percent >>= 8;
+		*value = activity_percent > 100 ? 100 : activity_percent;
+		return 0;
+	case AMDGPU_PP_SENSOR_GPU_TEMP:
+		*value = smu7_thermal_get_temperature(hwmgr);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
 static int smu7_find_dpm_states_clocks_in_dpm_table(struct pp_hwmgr *hwmgr, const void *input)
 {
 	const struct phm_set_power_state_input *states =
@@ -4315,6 +4350,7 @@ static struct pp_hwmgr_func smu7_hwmgr_funcs = {
 	.get_mclk_od = smu7_get_mclk_od,
 	.set_mclk_od = smu7_set_mclk_od,
 	.get_clock_by_type = smu7_get_clock_by_type,
+	.read_sensor = smu7_read_sensor,
 };
 
 uint8_t smu7_get_sleep_divider_id_from_clock(uint32_t clock,