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

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Allows you to force a performance level via sysfs.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-07-02 18:43:53 -04:00
parent 8b5e6b7f0e
commit 170a47f010
3 changed files with 34 additions and 7 deletions
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38
drivers/gpu/drm/radeon/ni_dpm.c
View file

@ -1037,13 +1037,37 @@ static int ni_restrict_performance_levels_before_switch(struct radeon_device *rd
0 : -EINVAL;
}
static int ni_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
int ni_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{
if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
struct radeon_ps *rps = rdev->pm.dpm.current_ps;
struct ni_ps *ps = ni_get_ps(rps);
u32 levels;
return (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) == PPSMC_Result_OK) ?
0 : -EINVAL;
if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
if (ni_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 (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
levels = ps->performance_level_count - 1;
if (ni_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 (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
return -EINVAL;
}
rdev->pm.dpm.forced_level = level;
return 0;
}
static void ni_stop_smc(struct radeon_device *rdev)
@ -3831,9 +3855,9 @@ int ni_dpm_set_power_state(struct radeon_device *rdev)
return ret;
}
ret = ni_unrestrict_performance_levels_after_switch(rdev);
ret = ni_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("ni_unrestrict_performance_levels_after_switch failed\n");
DRM_ERROR("ni_dpm_force_performance_level failed\n");
return ret;
}

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

@ -1940,6 +1940,7 @@ static struct radeon_asic cayman_asic = {
.get_mclk = &ni_dpm_get_mclk,
.print_power_state = &ni_dpm_print_power_state,
.debugfs_print_current_performance_level = &ni_dpm_debugfs_print_current_performance_level,
.force_performance_level = &ni_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,

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

@ -617,6 +617,8 @@ void ni_dpm_print_power_state(struct radeon_device *rdev,
struct radeon_ps *ps);
void ni_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
struct seq_file *m);
int ni_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
int trinity_dpm_init(struct radeon_device *rdev);
int trinity_dpm_enable(struct radeon_device *rdev);
void trinity_dpm_disable(struct radeon_device *rdev);