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

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 2013-07-02 18:46:28 -04:00
parent 170a47f010
commit a160a6a336
3 changed files with 36 additions and 9 deletions
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1
drivers/gpu/drm/radeon/radeon_asic.c
View File

@ -2287,6 +2287,7 @@ static struct radeon_asic si_asic = {
.get_mclk = &ni_dpm_get_mclk,
.print_power_state = &ni_dpm_print_power_state,
.debugfs_print_current_performance_level = &si_dpm_debugfs_print_current_performance_level,
.force_performance_level = &si_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,

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

@ -683,6 +683,8 @@ void si_dpm_fini(struct radeon_device *rdev);
void si_dpm_display_configuration_changed(struct radeon_device *rdev);
void si_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
struct seq_file *m);
int si_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
/* DCE8 - CIK */
void dce8_bandwidth_update(struct radeon_device *rdev);

38
drivers/gpu/drm/radeon/si_dpm.c
View File

@ -3231,16 +3231,38 @@ static int si_restrict_performance_levels_before_switch(struct radeon_device *rd
0 : -EINVAL;
}
#if 0
static int si_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
int si_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{
struct radeon_ps *rps = rdev->pm.dpm.current_ps;
struct ni_ps *ps = ni_get_ps(rps);
u32 levels;
if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 1) != PPSMC_Result_OK)
return -EINVAL;
} else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
return (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) == PPSMC_Result_OK) ?
0 : -EINVAL;
levels = ps->performance_level_count - 1;
if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, levels) != PPSMC_Result_OK)
return -EINVAL;
} else if (level == RADEON_DPM_FORCED_LEVEL_AUTO) {
if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
}
rdev->pm.dpm.forced_level = level;
return 0;
}
#endif
static int si_set_boot_state(struct radeon_device *rdev)
{
@ -5992,11 +6014,13 @@ int si_dpm_set_power_state(struct radeon_device *rdev)
#if 0
/* XXX */
ret = si_unrestrict_performance_levels_after_switch(rdev);
ret = si_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("si_unrestrict_performance_levels_after_switch failed\n");
DRM_ERROR("si_dpm_force_performance_level failed\n");
return ret;
}
#else
rdev->pm.dpm.forced_level = RADEON_DPM_FORCED_LEVEL_AUTO;
#endif
return 0;