drm/amd/powerplay: add helper function to get voltage id in votage table

Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 1aacda7..cb417c6 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -443,6 +443,27 @@ uint8_t phm_get_voltage_index(
        return i - 1;
 }
 
+uint8_t phm_get_voltage_id(pp_atomctrl_voltage_table *voltage_table,
+               uint32_t voltage)
+{
+       uint8_t count = (uint8_t) (voltage_table->count);
+       uint8_t i = 0;
+
+       PP_ASSERT_WITH_CODE((NULL != voltage_table),
+               "Voltage Table empty.", return 0;);
+       PP_ASSERT_WITH_CODE((0 != count),
+               "Voltage Table empty.", return 0;);
+
+       for (i = 0; i < count; i++) {
+               /* find first voltage bigger than requested */
+               if (voltage_table->entries[i].value >= voltage)
+                       return i;
+       }
+
+       /* voltage is bigger than max voltage in the table */
+       return i - 1;
+}
+
 uint16_t phm_find_closest_vddci(struct pp_atomctrl_voltage_table *vddci_table, uint16_t vddci)
 {
        uint32_t  i;

diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
index 2a060f6..aa4f5f3 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
@@ -685,6 +685,8 @@ extern void phm_trim_voltage_table_to_fit_state_table(uint32_t max_vol_steps, st
 extern int phm_reset_single_dpm_table(void *table, uint32_t count, int max);
 extern void phm_setup_pcie_table_entry(void *table, uint32_t index, uint32_t pcie_gen, uint32_t pcie_lanes);
 extern int32_t phm_get_dpm_level_enable_mask_value(void *table);
+extern uint8_t phm_get_voltage_id(struct pp_atomctrl_voltage_table *voltage_table,
+               uint32_t voltage);
 extern uint8_t phm_get_voltage_index(struct phm_ppt_v1_voltage_lookup_table *lookup_table, uint16_t voltage);
 extern uint16_t phm_find_closest_vddci(struct pp_atomctrl_voltage_table *vddci_table, uint16_t vddci);
 extern int phm_find_boot_level(void *table, uint32_t value, uint32_t *boot_level);
@@ -709,8 +711,6 @@ extern void phm_apply_dal_min_voltage_request(struct pp_hwmgr *hwmgr);
         PHM_FIELD_SHIFT(reg, field))
 
 
-
-
 /* Operations on named fields. */
 
 #define PHM_READ_FIELD(device, reg, field)     \