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drm/radeon/dpm: handle bapm on trinity

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bapm is a power management feature for handling the
power budget between the CPU and GPU on APUs.  This
patch adds support for enabling or disabling it.
For now disable it by default.  Enabling it properly
requires quite a bit more work and will be addressed
in a separate patch.

This patch fixes hangs on boot on certain trinity
laptops when the system is on battery power.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2013-09-09 18:56:50 -04:00
parent 6ea4e84d20
commit ef4e036584
4 changed files with 13 additions and 0 deletions
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1
drivers/gpu/drm/radeon/trinity_dpm.h
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@ -118,6 +118,7 @@ struct trinity_power_info {
#define TRINITY_AT_DFLT 30
/* trinity_smc.c */
int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable);
int trinity_dpm_config(struct radeon_device *rdev, bool enable);
int trinity_uvd_dpm_config(struct radeon_device *rdev);
int trinity_dpm_force_state(struct radeon_device *rdev, u32 n);