[PATCH 12/12] drm/amd/powerplay: enable clock stretch feature for polaris
Alex Deucher
alexdeucher at gmail.com
Tue Jun 21 14:28:00 UTC 2016
From: Rex Zhu <Rex.Zhu at amd.com>
Power saving feature which reduces the amount of
voltage needed for specific engine clocks.
Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
.../gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c | 120 ++++-----------------
1 file changed, 23 insertions(+), 97 deletions(-)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
index f730ec8..64ee78f 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
@@ -1759,12 +1759,9 @@ static int polaris10_populate_smc_initailial_state(struct pp_hwmgr *hwmgr)
static int polaris10_populate_clock_stretcher_data_table(struct pp_hwmgr *hwmgr)
{
- uint32_t ro, efuse, efuse2, clock_freq, volt_without_cks,
- volt_with_cks, value;
- uint16_t clock_freq_u16;
+ uint32_t ro, efuse, volt_without_cks, volt_with_cks, value, max, min;
struct polaris10_hwmgr *data = (struct polaris10_hwmgr *)(hwmgr->backend);
- uint8_t type, i, j, cks_setting, stretch_amount, stretch_amount2,
- volt_offset = 0;
+ uint8_t i, stretch_amount, stretch_amount2, volt_offset = 0;
struct phm_ppt_v1_information *table_info =
(struct phm_ppt_v1_information *)(hwmgr->pptable);
struct phm_ppt_v1_clock_voltage_dependency_table *sclk_table =
@@ -1776,50 +1773,38 @@ static int polaris10_populate_clock_stretcher_data_table(struct pp_hwmgr *hwmgr)
* if the part is SS or FF. if RO >= 1660MHz, part is FF.
*/
efuse = cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC,
- ixSMU_EFUSE_0 + (146 * 4));
- efuse2 = cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC,
- ixSMU_EFUSE_0 + (148 * 4));
+ ixSMU_EFUSE_0 + (67 * 4));
efuse &= 0xFF000000;
efuse = efuse >> 24;
- efuse2 &= 0xF;
- if (efuse2 == 1)
- ro = (2300 - 1350) * efuse / 255 + 1350;
- else
- ro = (2500 - 1000) * efuse / 255 + 1000;
-
- if (ro >= 1660)
- type = 0;
- else
- type = 1;
+ if (hwmgr->chip_id == CHIP_POLARIS10) {
+ min = 1000;
+ max = 2300;
+ } else {
+ min = 1100;
+ max = 2100;
+ }
- /* Populate Stretch amount */
- data->smc_state_table.ClockStretcherAmount = stretch_amount;
+ ro = efuse * (max -min)/255 + min;
/* Populate Sclk_CKS_masterEn0_7 and Sclk_voltageOffset */
for (i = 0; i < sclk_table->count; i++) {
data->smc_state_table.Sclk_CKS_masterEn0_7 |=
sclk_table->entries[i].cks_enable << i;
- volt_without_cks = (uint32_t)((14041 *
- (sclk_table->entries[i].clk/100) / 10000 + 3571 + 75 - ro) * 1000 /
- (4026 - (13924 * (sclk_table->entries[i].clk/100) / 10000)));
- volt_with_cks = (uint32_t)((13946 *
- (sclk_table->entries[i].clk/100) / 10000 + 3320 + 45 - ro) * 1000 /
- (3664 - (11454 * (sclk_table->entries[i].clk/100) / 10000)));
+
+ volt_without_cks = (uint32_t)(((ro - 40) * 1000 - 2753594 - sclk_table->entries[i].clk/100 * 136418 /1000) / \
+ (sclk_table->entries[i].clk/100 * 1132925 /10000 - 242418)/100);
+
+ volt_with_cks = (uint32_t)((ro * 1000 -2396351 - sclk_table->entries[i].clk/100 * 329021/1000) / \
+ (sclk_table->entries[i].clk/10000 * 649434 /1000 - 18005)/10);
+
if (volt_without_cks >= volt_with_cks)
volt_offset = (uint8_t)(((volt_without_cks - volt_with_cks +
sclk_table->entries[i].cks_voffset) * 100 / 625) + 1);
+
data->smc_state_table.Sclk_voltageOffset[i] = volt_offset;
}
- PHM_WRITE_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC, PWR_CKS_ENABLE,
- STRETCH_ENABLE, 0x0);
- PHM_WRITE_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC, PWR_CKS_ENABLE,
- masterReset, 0x1);
- /* PHM_WRITE_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC, PWR_CKS_ENABLE, staticEnable, 0x1); */
- PHM_WRITE_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC, PWR_CKS_ENABLE,
- masterReset, 0x0);
-
/* Populate CKS Lookup Table */
if (stretch_amount == 1 || stretch_amount == 2 || stretch_amount == 5)
stretch_amount2 = 0;
@@ -1833,69 +1818,6 @@ static int polaris10_populate_clock_stretcher_data_table(struct pp_hwmgr *hwmgr)
return -EINVAL);
}
- value = cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC,
- ixPWR_CKS_CNTL);
- value &= 0xFFC2FF87;
- data->smc_state_table.CKS_LOOKUPTable.CKS_LOOKUPTableEntry[0].minFreq =
- polaris10_clock_stretcher_lookup_table[stretch_amount2][0];
- data->smc_state_table.CKS_LOOKUPTable.CKS_LOOKUPTableEntry[0].maxFreq =
- polaris10_clock_stretcher_lookup_table[stretch_amount2][1];
- clock_freq_u16 = (uint16_t)(PP_SMC_TO_HOST_UL(data->smc_state_table.
- GraphicsLevel[data->smc_state_table.GraphicsDpmLevelCount - 1].SclkSetting.SclkFrequency) / 100);
- if (polaris10_clock_stretcher_lookup_table[stretch_amount2][0] < clock_freq_u16
- && polaris10_clock_stretcher_lookup_table[stretch_amount2][1] > clock_freq_u16) {
- /* Program PWR_CKS_CNTL. CKS_USE_FOR_LOW_FREQ */
- value |= (polaris10_clock_stretcher_lookup_table[stretch_amount2][3]) << 16;
- /* Program PWR_CKS_CNTL. CKS_LDO_REFSEL */
- value |= (polaris10_clock_stretcher_lookup_table[stretch_amount2][2]) << 18;
- /* Program PWR_CKS_CNTL. CKS_STRETCH_AMOUNT */
- value |= (polaris10_clock_stretch_amount_conversion
- [polaris10_clock_stretcher_lookup_table[stretch_amount2][3]]
- [stretch_amount]) << 3;
- }
- CONVERT_FROM_HOST_TO_SMC_US(data->smc_state_table.CKS_LOOKUPTable.CKS_LOOKUPTableEntry[0].minFreq);
- CONVERT_FROM_HOST_TO_SMC_US(data->smc_state_table.CKS_LOOKUPTable.CKS_LOOKUPTableEntry[0].maxFreq);
- data->smc_state_table.CKS_LOOKUPTable.CKS_LOOKUPTableEntry[0].setting =
- polaris10_clock_stretcher_lookup_table[stretch_amount2][2] & 0x7F;
- data->smc_state_table.CKS_LOOKUPTable.CKS_LOOKUPTableEntry[0].setting |=
- (polaris10_clock_stretcher_lookup_table[stretch_amount2][3]) << 7;
-
- cgs_write_ind_register(hwmgr->device, CGS_IND_REG__SMC,
- ixPWR_CKS_CNTL, value);
-
- /* Populate DDT Lookup Table */
- for (i = 0; i < 4; i++) {
- /* Assign the minimum and maximum VID stored
- * in the last row of Clock Stretcher Voltage Table.
- */
- data->smc_state_table.ClockStretcherDataTable.ClockStretcherDataTableEntry[i].minVID =
- (uint8_t) polaris10_clock_stretcher_ddt_table[type][i][2];
- data->smc_state_table.ClockStretcherDataTable.ClockStretcherDataTableEntry[i].maxVID =
- (uint8_t) polaris10_clock_stretcher_ddt_table[type][i][3];
- /* Loop through each SCLK and check the frequency
- * to see if it lies within the frequency for clock stretcher.
- */
- for (j = 0; j < data->smc_state_table.GraphicsDpmLevelCount; j++) {
- cks_setting = 0;
- clock_freq = PP_SMC_TO_HOST_UL(
- data->smc_state_table.GraphicsLevel[j].SclkSetting.SclkFrequency);
- /* Check the allowed frequency against the sclk level[j].
- * Sclk's endianness has already been converted,
- * and it's in 10Khz unit,
- * as opposed to Data table, which is in Mhz unit.
- */
- if (clock_freq >= (polaris10_clock_stretcher_ddt_table[type][i][0]) * 100) {
- cks_setting |= 0x2;
- if (clock_freq < (polaris10_clock_stretcher_ddt_table[type][i][1]) * 100)
- cks_setting |= 0x1;
- }
- data->smc_state_table.ClockStretcherDataTable.ClockStretcherDataTableEntry[i].setting
- |= cks_setting << (j * 2);
- }
- CONVERT_FROM_HOST_TO_SMC_US(
- data->smc_state_table.ClockStretcherDataTable.ClockStretcherDataTableEntry[i].setting);
- }
-
value = cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixPWR_CKS_CNTL);
value &= 0xFFFFFFFE;
cgs_write_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixPWR_CKS_CNTL, value);
@@ -3062,6 +2984,10 @@ int polaris10_hwmgr_backend_init(struct pp_hwmgr *hwmgr)
data->vddci_control = POLARIS10_VOLTAGE_CONTROL_BY_SVID2;
}
+ if (table_info->cac_dtp_table->usClockStretchAmount != 0)
+ phm_cap_set(hwmgr->platform_descriptor.platformCaps,
+ PHM_PlatformCaps_ClockStretcher);
+
polaris10_set_features_platform_caps(hwmgr);
polaris10_init_dpm_defaults(hwmgr);
--
2.5.5
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