This is a note to let you know that I've just added the patch titled
drm/radeon: enable bapm by default on desktop TN/RL boards
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-enable-bapm-by-default-on-desktop-tn-rl-boards.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0c78a44964db3d483b0c09a8236e0fe123aa9cfc Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Tue, 17 Jun 2014 16:01:08 -0400
Subject: drm/radeon: enable bapm by default on desktop TN/RL boards
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 0c78a44964db3d483b0c09a8236e0fe123aa9cfc upstream.
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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/trinity_dpm.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/radeon/trinity_dpm.c
+++ b/drivers/gpu/drm/radeon/trinity_dpm.c
@@ -1877,7 +1877,15 @@ int trinity_dpm_init(struct radeon_devic
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;
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-3.14/drm-radeon-enable-bapm-by-default-on-desktop-tn-rl-boards.patch
queue-3.14/drm-radeon-tn-only-enable-bapm-on-msi-systems.patch
queue-3.14/drm-radeon-tweak-accel_working2-query-for-hawaii.patch
queue-3.14/drm-radeon-dpm-handle-voltage-info-fetching-on-hawaii.patch
queue-3.14/drm-radeon-atom-add-new-voltage-fetch-function-for-hawaii.patch
queue-3.14/drm-radeon-set-vm-base-addr-using-the-pfp-v2.patch
queue-3.14/drm-radeon-re-enable-dpm-by-default-on-btc.patch
queue-3.14/drm-radeon-load-the-lm63-driver-for-an-lm64-thermal-chip.patch
queue-3.14/drm-radeon-re-enable-dpm-by-default-on-cayman.patch
--
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