drm/radeon/TN: only enable bapm on MSI systems

commit 730a336c33a3398d65896e8ee3ef9f5679fe30a9 upstream.

There still seem to be stability problems with other systems.

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

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/radeon/trinity_dpm.c b/drivers/gpu/drm/radeon/trinity_dpm.c
index 19be829..d9cfa09 100644 (file)
--- a/drivers/gpu/drm/radeon/trinity_dpm.c
+++ b/drivers/gpu/drm/radeon/trinity_dpm.c
@@ -1877,15 +1877,16 @@ int trinity_dpm_init(struct radeon_device *rdev)
        for (i = 0; i < SUMO_MAX_HARDWARE_POWERLEVELS; i++)
                pi->at[i] = TRINITY_AT_DFLT;
 
-       /* 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.
+       /* There are stability issues reported on with
+        * bapm enabled when switching between AC and battery
+        * power.  At the same time, some MSI boards hang
+        * if it's not enabled and dpm is enabled.  Just enable
+        * it for MSI boards right now.
         */
-       if (rdev->flags & RADEON_IS_MOBILITY)
-               pi->enable_bapm = false;
-       else
+       if (rdev->pdev->subsystem_vendor == 0x1462)
                pi->enable_bapm = true;
+       else
+               pi->enable_bapm = false;
        pi->enable_nbps_policy = true;
        pi->enable_sclk_ds = true;
        pi->enable_gfx_power_gating = true;