drm/radeon: enable bapm by default on desktop TN/RL boards

bapm enabled the GPU and CPU to share TDP headroom.  It was
disabled by default since some laptops hung when it was enabled
in conjunction with dpm.  It seems to be stable on desktop
boards and fixes hangs on boot with dpm enabled on certain
boards, so enable it by default on desktop boards.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=72921

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/trinity_dpm.c b/drivers/gpu/drm/radeon/trinity_dpm.c
index 2a2822c03329e7fcefcb016e3e7bae5128c45777..20da6ff183df9b6fb5b59554616a30f28aeeb96f 100644 (file)
--- a/drivers/gpu/drm/radeon/trinity_dpm.c
+++ b/drivers/gpu/drm/radeon/trinity_dpm.c
@@ -1874,7 +1874,15 @@ int trinity_dpm_init(struct radeon_device *rdev)
        for (i = 0; i < SUMO_MAX_HARDWARE_POWERLEVELS; i++)
                pi->at[i] = TRINITY_AT_DFLT;
 
-       pi->enable_bapm = false;
+       /* There are stability issues reported on latops with
+        * bapm installed when switching between AC and battery
+        * power.  At the same time, some desktop boards hang
+        * if it's not enabled and dpm is enabled.
+        */
+       if (rdev->flags & RADEON_IS_MOBILITY)
+               pi->enable_bapm = false;
+       else
+               pi->enable_bapm = true;
        pi->enable_nbps_policy = true;
        pi->enable_sclk_ds = true;
        pi->enable_gfx_power_gating = true;