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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>
This commit is contained in:
Alex Deucher 2014-06-17 16:01:08 -04:00
parent 09f95d5b8c
commit 0c78a44964
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/radeon/trinity_dpm.c
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@ -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;