drm/radeon/kms/pm: rework power management
Add two new sysfs attributes:
- dynpm
- power_state
Echoing 0/1 to dynpm disables/enables dynamic power management.
The driver scales the sclk dynamically based on the number of
queued fences. dynpm only scales sclk dynamically in single head
mode.
Echoing x.y to power_state selects a static power state (x) and clock
mode (y). This allows you to statically select a power state and clock
mode. Selecting a static clock mode will disable dynpm.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 38f75f5..4691309 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -247,7 +247,7 @@
pcie_lanes);
}
-void r600_set_power_state(struct radeon_device *rdev)
+void r600_set_power_state(struct radeon_device *rdev, bool static_switch)
{
u32 sclk, mclk;
@@ -266,37 +266,52 @@
clock_info[rdev->pm.requested_clock_mode_index].mclk;
if (mclk > rdev->clock.default_mclk)
mclk = rdev->clock.default_mclk;
- /* don't change the mclk with multiple crtcs */
- if (rdev->pm.active_crtc_count > 1)
- mclk = rdev->clock.default_mclk;
- /* set pcie lanes */
- /* TODO */
+ /* voltage, pcie lanes, etc.*/
+ radeon_pm_misc(rdev);
- /* set voltage */
- /* TODO */
-
- /* set engine clock */
- if (sclk != rdev->pm.current_sclk) {
- radeon_sync_with_vblank(rdev);
- radeon_pm_debug_check_in_vbl(rdev, false);
- radeon_set_engine_clock(rdev, sclk);
- radeon_pm_debug_check_in_vbl(rdev, true);
- rdev->pm.current_sclk = sclk;
- DRM_INFO("Setting: e: %d\n", sclk);
- }
+ if (static_switch) {
+ radeon_pm_prepare(rdev);
+ /* set engine clock */
+ if (sclk != rdev->pm.current_sclk) {
+ radeon_set_engine_clock(rdev, sclk);
+ rdev->pm.current_sclk = sclk;
+ DRM_INFO("Setting: e: %d\n", sclk);
+ }
+#if 0
+ /* set memory clock */
+ if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
+ radeon_set_memory_clock(rdev, mclk);
+ rdev->pm.current_mclk = mclk;
+ DRM_INFO("Setting: m: %d\n", mclk);
+ }
+#endif
+ radeon_pm_finish(rdev);
+ } else {
+ /* set engine clock */
+ if (sclk != rdev->pm.current_sclk) {
+ radeon_sync_with_vblank(rdev);
+ radeon_pm_debug_check_in_vbl(rdev, false);
+ radeon_set_engine_clock(rdev, sclk);
+ radeon_pm_debug_check_in_vbl(rdev, true);
+ rdev->pm.current_sclk = sclk;
+ DRM_INFO("Setting: e: %d\n", sclk);
+ }
#if 0
- /* set memory clock */
- if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
- radeon_sync_with_vblank(rdev);
- radeon_pm_debug_check_in_vbl(rdev, false);
- radeon_set_memory_clock(rdev, mclk);
- radeon_pm_debug_check_in_vbl(rdev, true);
- rdev->pm.current_mclk = mclk;
- DRM_INFO("Setting: m: %d\n", mclk);
- }
+ /* set memory clock */
+ if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
+ radeon_sync_with_vblank(rdev);
+ radeon_pm_debug_check_in_vbl(rdev, false);
+ radeon_pm_prepare(rdev);
+ radeon_set_memory_clock(rdev, mclk);
+ radeon_pm_finish(rdev);
+ radeon_pm_debug_check_in_vbl(rdev, true);
+ rdev->pm.current_mclk = mclk;
+ DRM_INFO("Setting: m: %d\n", mclk);
+ }
#endif
+ }
rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;