This is a note to let you know that I've just added the patch titled
drm/i915: use the correct force_wake function at the PC8 code
to the 3.12-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-i915-use-the-correct-force_wake-function-at-the-pc8-code.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a1216444283e81fd904593a4a77c90adfe5d14d1 Mon Sep 17 00:00:00 2001
From: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Date: Thu, 21 Nov 2013 13:47:16 -0200
Subject: drm/i915: use the correct force_wake function at the PC8 code
From: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
commit a1216444283e81fd904593a4a77c90adfe5d14d1 upstream.
When I submitted the first patch adding these force wake functions,
Chris Wilson observed that I was using the wrong functions, so I sent
a second version of the patch to correct this problem. The problem is
that v1 was merged instead of v2.
I was able to notice the problem when running the
debugfs-forcewake-user subtest of pm_pc8 from intel-gpu-tools.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6062,7 +6062,7 @@ void hsw_restore_lcpll(struct drm_i915_p
/* Make sure we're not on PC8 state before disabling PC8, otherwise
* we'll hang the machine! */
- dev_priv->uncore.funcs.force_wake_get(dev_priv);
+ gen6_gt_force_wake_get(dev_priv);
if (val & LCPLL_POWER_DOWN_ALLOW) {
val &= ~LCPLL_POWER_DOWN_ALLOW;
@@ -6093,7 +6093,7 @@ void hsw_restore_lcpll(struct drm_i915_p
DRM_ERROR("Switching back to LCPLL failed\n");
}
- dev_priv->uncore.funcs.force_wake_put(dev_priv);
+ gen6_gt_force_wake_put(dev_priv);
}
void hsw_enable_pc8_work(struct work_struct *__work)
Patches currently in stable-queue which might be from paulo.r.zanoni@xxxxxxxxx are
queue-3.12/drm-i915-use-the-correct-force_wake-function-at-the-pc8-code.patch
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