drm/radeon/dpm: add infrastructure to force performance levels
This allows you to force specific power levels within a power
state. Due to hardware restrictions between generations, the
interface is limited to the following 3 selections:
auto: all levels enabled
low: forced to the lowest power level
high: forced to the highest power level
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 08cecec..b468131 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1335,6 +1335,12 @@
RADEON_PCIE_GEN_INVALID = 0xffff
};
+enum radeon_dpm_forced_level {
+ RADEON_DPM_FORCED_LEVEL_AUTO = 0,
+ RADEON_DPM_FORCED_LEVEL_LOW = 1,
+ RADEON_DPM_FORCED_LEVEL_HIGH = 2,
+};
+
struct radeon_dpm {
struct radeon_ps *ps;
/* number of valid power states */
@@ -1374,6 +1380,8 @@
bool uvd_active;
/* thermal handling */
struct radeon_dpm_thermal thermal;
+ /* forced levels */
+ enum radeon_dpm_forced_level forced_level;
};
void radeon_dpm_enable_power_state(struct radeon_device *rdev,
@@ -1669,6 +1677,7 @@
u32 (*get_mclk)(struct radeon_device *rdev, bool low);
void (*print_power_state)(struct radeon_device *rdev, struct radeon_ps *ps);
void (*debugfs_print_current_performance_level)(struct radeon_device *rdev, struct seq_file *m);
+ int (*force_performance_level)(struct radeon_device *rdev, enum radeon_dpm_forced_level level);
} dpm;
/* pageflipping */
struct {
@@ -2436,6 +2445,7 @@
#define radeon_dpm_get_mclk(rdev, l) rdev->asic->dpm.get_mclk((rdev), (l))
#define radeon_dpm_print_power_state(rdev, ps) rdev->asic->dpm.print_power_state((rdev), (ps))
#define radeon_dpm_debugfs_print_current_performance_level(rdev, m) rdev->asic->dpm.debugfs_print_current_performance_level((rdev), (m))
+#define radeon_dpm_force_performance_level(rdev, l) rdev->asic->dpm.force_performance_level((rdev), (l))
/* Common functions */
/* AGP */