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drm/radeon/dpm: implement force performance levels for 7xx/eg/btc 

Allows you to limit the selected power levels via sysfs.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-07-02 18:40:35 -04:00
parent 70d01a5ee2
commit 8b5e6b7f0e
7 changed files with 36 additions and 11 deletions
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4
drivers/gpu/drm/radeon/btc_dpm.c
View File

@ -2326,9 +2326,9 @@ int btc_dpm_set_power_state(struct radeon_device *rdev)
return ret;
}
ret = rv770_unrestrict_performance_levels_after_switch(rdev);
ret = rv770_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
DRM_ERROR("rv770_dpm_force_performance_level failed\n");
return ret;
}

4
drivers/gpu/drm/radeon/cypress_dpm.c
View File

@ -2014,9 +2014,9 @@ int cypress_dpm_set_power_state(struct radeon_device *rdev)
if (eg_pi->pcie_performance_request)
cypress_notify_link_speed_change_after_state_change(rdev, new_ps, old_ps);
ret = rv770_unrestrict_performance_levels_after_switch(rdev);
ret = rv770_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
DRM_ERROR("rv770_dpm_force_performance_level failed\n");
return ret;
}

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

@ -71,6 +71,8 @@ typedef uint8_t PPSMC_Result;
#define PPSMC_MSG_SwitchToSwState ((uint8_t)0x20)
#define PPSMC_MSG_SwitchToInitialState ((uint8_t)0x40)
#define PPSMC_MSG_NoForcedLevel ((uint8_t)0x41)
#define PPSMC_MSG_ForceHigh ((uint8_t)0x42)
#define PPSMC_MSG_ForceMediumOrHigh ((uint8_t)0x43)
#define PPSMC_MSG_SwitchToMinimumPower ((uint8_t)0x51)
#define PPSMC_MSG_ResumeFromMinimumPower ((uint8_t)0x52)
#define PPSMC_MSG_EnableCac ((uint8_t)0x53)

3
drivers/gpu/drm/radeon/radeon_asic.c
View File

@ -1393,6 +1393,7 @@ static struct radeon_asic rv770_asic = {
.get_mclk = &rv770_dpm_get_mclk,
.print_power_state = &rv770_dpm_print_power_state,
.debugfs_print_current_performance_level = &rv770_dpm_debugfs_print_current_performance_level,
.force_performance_level = &rv770_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &rs600_pre_page_flip,
@ -1516,6 +1517,7 @@ static struct radeon_asic evergreen_asic = {
.get_mclk = &rv770_dpm_get_mclk,
.print_power_state = &rv770_dpm_print_power_state,
.debugfs_print_current_performance_level = &rv770_dpm_debugfs_print_current_performance_level,
.force_performance_level = &rv770_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,
@ -1762,6 +1764,7 @@ static struct radeon_asic btc_asic = {
.get_mclk = &btc_dpm_get_mclk,
.print_power_state = &rv770_dpm_print_power_state,
.debugfs_print_current_performance_level = &rv770_dpm_debugfs_print_current_performance_level,
.force_performance_level = &rv770_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,

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

@ -478,6 +478,8 @@ void rv770_dpm_print_power_state(struct radeon_device *rdev,
struct radeon_ps *ps);
void rv770_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
struct seq_file *m);
int rv770_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
/*
* evergreen

29
drivers/gpu/drm/radeon/rv770_dpm.c
View File

@ -1471,13 +1471,29 @@ int rv770_restrict_performance_levels_before_switch(struct radeon_device *rdev)
return 0;
}
int rv770_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
int rv770_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{
if (rv770_send_msg_to_smc(rdev, (PPSMC_Msg)(PPSMC_MSG_NoForcedLevel)) != PPSMC_Result_OK)
PPSMC_Msg msg;
if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
if (rv770_send_msg_to_smc(rdev, PPSMC_MSG_ZeroLevelsDisabled) != PPSMC_Result_OK)
return -EINVAL;
msg = PPSMC_MSG_ForceHigh;
} else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
if (rv770_send_msg_to_smc(rdev, PPSMC_MSG_NoForcedLevel) != PPSMC_Result_OK)
return -EINVAL;
msg = (PPSMC_Msg)(PPSMC_MSG_TwoLevelsDisabled);
} else {
if (rv770_send_msg_to_smc(rdev, PPSMC_MSG_NoForcedLevel) != PPSMC_Result_OK)
return -EINVAL;
msg = (PPSMC_Msg)(PPSMC_MSG_ZeroLevelsDisabled);
}
if (rv770_send_msg_to_smc(rdev, msg) != PPSMC_Result_OK)
return -EINVAL;
if (rv770_send_msg_to_smc(rdev, (PPSMC_Msg)(PPSMC_MSG_ZeroLevelsDisabled)) != PPSMC_Result_OK)
return -EINVAL;
rdev->pm.dpm.forced_level = level;
return 0;
}
@ -2047,9 +2063,10 @@ int rv770_dpm_set_power_state(struct radeon_device *rdev)
if (pi->dcodt)
rv770_program_dcodt_after_state_switch(rdev, new_ps, old_ps);
rv770_set_uvd_clock_after_set_eng_clock(rdev, new_ps, old_ps);
ret = rv770_unrestrict_performance_levels_after_switch(rdev);
ret = rv770_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
DRM_ERROR("rv770_dpm_force_performance_level failed\n");
return ret;
}

3
drivers/gpu/drm/radeon/rv770_dpm.h
View File

@ -262,7 +262,8 @@ void rv770_stop_dpm(struct radeon_device *rdev);
void r7xx_stop_smc(struct radeon_device *rdev);
void rv770_reset_smio_status(struct radeon_device *rdev);
int rv770_restrict_performance_levels_before_switch(struct radeon_device *rdev);
int rv770_unrestrict_performance_levels_after_switch(struct radeon_device *rdev);
int rv770_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
int rv770_halt_smc(struct radeon_device *rdev);
int rv770_resume_smc(struct radeon_device *rdev);
int rv770_set_sw_state(struct radeon_device *rdev);