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drm/radeon/dpm: implement force performance level for CI 

Allows you to force the selected performance level via sysfs.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-07-15 18:14:24 -04:00
parent 94b4adc5ae
commit 89536fd600
4 changed files with 157 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

153
drivers/gpu/drm/radeon/ci_dpm.c
View File

@ -3601,6 +3601,153 @@ static int ci_generate_dpm_level_enable_mask(struct radeon_device *rdev,
return 0;
}
static u32 ci_get_lowest_enabled_level(struct radeon_device *rdev,
u32 level_mask)
{
u32 level = 0;
while ((level_mask & (1 << level)) == 0)
level++;
return level;
}
int ci_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{
struct ci_power_info *pi = ci_get_pi(rdev);
PPSMC_Result smc_result;
u32 tmp, levels, i;
int ret;
if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
if ((!pi->sclk_dpm_key_disabled) &&
pi->dpm_level_enable_mask.sclk_dpm_enable_mask) {
levels = 0;
tmp = pi->dpm_level_enable_mask.sclk_dpm_enable_mask;
while (tmp >>= 1)
levels++;
if (levels) {
ret = ci_dpm_force_state_sclk(rdev, levels);
if (ret)
return ret;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = (RREG32_SMC(TARGET_AND_CURRENT_PROFILE_INDEX) &
CURR_SCLK_INDEX_MASK) >> CURR_SCLK_INDEX_SHIFT;
if (tmp == levels)
break;
udelay(1);
}
}
}
if ((!pi->mclk_dpm_key_disabled) &&
pi->dpm_level_enable_mask.mclk_dpm_enable_mask) {
levels = 0;
tmp = pi->dpm_level_enable_mask.mclk_dpm_enable_mask;
while (tmp >>= 1)
levels++;
if (levels) {
ret = ci_dpm_force_state_mclk(rdev, levels);
if (ret)
return ret;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = (RREG32_SMC(TARGET_AND_CURRENT_PROFILE_INDEX) &
CURR_MCLK_INDEX_MASK) >> CURR_MCLK_INDEX_SHIFT;
if (tmp == levels)
break;
udelay(1);
}
}
}
if ((!pi->pcie_dpm_key_disabled) &&
pi->dpm_level_enable_mask.pcie_dpm_enable_mask) {
levels = 0;
tmp = pi->dpm_level_enable_mask.pcie_dpm_enable_mask;
while (tmp >>= 1)
levels++;
if (levels) {
ret = ci_dpm_force_state_pcie(rdev, level);
if (ret)
return ret;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = (RREG32_SMC(TARGET_AND_CURRENT_PROFILE_INDEX_1) &
CURR_PCIE_INDEX_MASK) >> CURR_PCIE_INDEX_SHIFT;
if (tmp == levels)
break;
udelay(1);
}
}
}
} else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
if ((!pi->sclk_dpm_key_disabled) &&
pi->dpm_level_enable_mask.sclk_dpm_enable_mask) {
levels = ci_get_lowest_enabled_level(rdev,
pi->dpm_level_enable_mask.sclk_dpm_enable_mask);
ret = ci_dpm_force_state_sclk(rdev, levels);
if (ret)
return ret;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = (RREG32_SMC(TARGET_AND_CURRENT_PROFILE_INDEX) &
CURR_SCLK_INDEX_MASK) >> CURR_SCLK_INDEX_SHIFT;
if (tmp == levels)
break;
udelay(1);
}
}
if ((!pi->mclk_dpm_key_disabled) &&
pi->dpm_level_enable_mask.mclk_dpm_enable_mask) {
levels = ci_get_lowest_enabled_level(rdev,
pi->dpm_level_enable_mask.mclk_dpm_enable_mask);
ret = ci_dpm_force_state_mclk(rdev, levels);
if (ret)
return ret;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = (RREG32_SMC(TARGET_AND_CURRENT_PROFILE_INDEX) &
CURR_MCLK_INDEX_MASK) >> CURR_MCLK_INDEX_SHIFT;
if (tmp == levels)
break;
udelay(1);
}
}
if ((!pi->pcie_dpm_key_disabled) &&
pi->dpm_level_enable_mask.pcie_dpm_enable_mask) {
levels = ci_get_lowest_enabled_level(rdev,
pi->dpm_level_enable_mask.pcie_dpm_enable_mask);
ret = ci_dpm_force_state_pcie(rdev, levels);
if (ret)
return ret;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = (RREG32_SMC(TARGET_AND_CURRENT_PROFILE_INDEX_1) &
CURR_PCIE_INDEX_MASK) >> CURR_PCIE_INDEX_SHIFT;
if (tmp == levels)
break;
udelay(1);
}
}
} else if (level == RADEON_DPM_FORCED_LEVEL_AUTO) {
if (!pi->sclk_dpm_key_disabled) {
smc_result = ci_send_msg_to_smc(rdev, PPSMC_MSG_NoForcedLevel);
if (smc_result != PPSMC_Result_OK)
return -EINVAL;
}
if (!pi->mclk_dpm_key_disabled) {
smc_result = ci_send_msg_to_smc(rdev, PPSMC_MSG_MCLKDPM_NoForcedLevel);
if (smc_result != PPSMC_Result_OK)
return -EINVAL;
}
if (!pi->pcie_dpm_key_disabled) {
smc_result = ci_send_msg_to_smc(rdev, PPSMC_MSG_PCIeDPM_UnForceLevel);
if (smc_result != PPSMC_Result_OK)
return -EINVAL;
}
}
rdev->pm.dpm.forced_level = level;
return 0;
}
static int ci_set_mc_special_registers(struct radeon_device *rdev,
struct ci_mc_reg_table *table)
{
@ -4548,6 +4695,12 @@ int ci_dpm_set_power_state(struct radeon_device *rdev)
if (pi->pcie_performance_request)
ci_notify_link_speed_change_after_state_change(rdev, new_ps, old_ps);
ret = ci_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("ci_dpm_force_performance_level failed\n");
return ret;
}
return 0;
}

1
drivers/gpu/drm/radeon/ppsmc.h
View File

@ -119,6 +119,7 @@ typedef uint8_t PPSMC_Result;
#define PPSMC_MSG_SCLKDPM_SetEnabledMask ((uint16_t) 0x145)
#define PPSMC_MSG_MCLKDPM_SetEnabledMask ((uint16_t) 0x146)
#define PPSMC_MSG_PCIeDPM_ForceLevel ((uint16_t) 0x147)
#define PPSMC_MSG_PCIeDPM_UnForceLevel ((uint16_t) 0x148)
#define PPSMC_MSG_EnableVRHotGPIOInterrupt ((uint16_t) 0x14a)
#define PPSMC_MSG_DPM_Enable ((uint16_t) 0x14e)
#define PPSMC_MSG_DPM_Disable ((uint16_t) 0x14f)

1
drivers/gpu/drm/radeon/radeon_asic.c
View File

@ -2468,6 +2468,7 @@ static struct radeon_asic ci_asic = {
.get_mclk = &ci_dpm_get_mclk,
.print_power_state = &ci_dpm_print_power_state,
.debugfs_print_current_performance_level = &ci_dpm_debugfs_print_current_performance_level,
.force_performance_level = &ci_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,

2
drivers/gpu/drm/radeon/radeon_asic.h
View File

@ -765,6 +765,8 @@ void ci_dpm_print_power_state(struct radeon_device *rdev,
struct radeon_ps *ps);
void ci_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
struct seq_file *m);
int ci_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
int kv_dpm_init(struct radeon_device *rdev);
int kv_dpm_enable(struct radeon_device *rdev);