drm/radeon/dpm: add infrastructure to properly handle bapm

bapm is a pm feature for sharing the power budget between
the GPU and the CPU on APUs.  It needs to be enabled or
disabled in certain circumstances.  For now, disable it
when on battery and enable it when on AC power.

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 b37f9859d5a5dd3be9c477618ef992877e9657ae..a400ac1c414715423064874d37f047b426f7fe19 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1778,6 +1778,7 @@ struct radeon_asic {
                int (*force_performance_level)(struct radeon_device *rdev, enum radeon_dpm_forced_level level);
                bool (*vblank_too_short)(struct radeon_device *rdev);
                void (*powergate_uvd)(struct radeon_device *rdev, bool gate);
+               void (*enable_bapm)(struct radeon_device *rdev, bool enable);
        } dpm;
        /* pageflipping */
        struct {
@@ -2647,6 +2648,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
 #define radeon_dpm_force_performance_level(rdev, l) rdev->asic->dpm.force_performance_level((rdev), (l))
 #define radeon_dpm_vblank_too_short(rdev) rdev->asic->dpm.vblank_too_short((rdev))
 #define radeon_dpm_powergate_uvd(rdev, g) rdev->asic->dpm.powergate_uvd((rdev), (g))
+#define radeon_dpm_enable_bapm(rdev, e) rdev->asic->dpm.enable_bapm((rdev), (e))
 
 /* Common functions */
 /* AGP */

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 33c88c4038cfc71d4dfacb919752624a2310a251..d41ac8a4224da3461d946e8533a3a6f27d8b2dbe 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -67,7 +67,16 @@ int radeon_pm_get_type_index(struct radeon_device *rdev,
 
 void radeon_pm_acpi_event_handler(struct radeon_device *rdev)
 {
-       if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
+       if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) {
+               mutex_lock(&rdev->pm.mutex);
+               if (power_supply_is_system_supplied() > 0)
+                       rdev->pm.dpm.ac_power = true;
+               else
+                       rdev->pm.dpm.ac_power = false;
+               if (rdev->asic->dpm.enable_bapm)
+                       radeon_dpm_enable_bapm(rdev, rdev->pm.dpm.ac_power);
+               mutex_unlock(&rdev->pm.mutex);
+        } else if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
                if (rdev->pm.profile == PM_PROFILE_AUTO) {
                        mutex_lock(&rdev->pm.mutex);
                        radeon_pm_update_profile(rdev);