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Patch "drm/i915: Fix setting of boost freq tunable" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message Jan 6, 2017

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Stable branch DRM drivers Intel i915
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This is a note to let you know that I've just added the patch titled

drm/i915: Fix setting of boost freq tunable

to the 4.9-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-fix-setting-of-boost-freq-tunable.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From b1b7ec985805e005055d1d471ca586a715ffc10a Mon Sep 17 00:00:00 2001

From: Mika Kuoppala <[email protected]>
Date: Wed, 14 Dec 2016 14:26:20 +0200
Subject: drm/i915: Fix setting of boost freq tunable

From: Mika Kuoppala <[email protected]>

commit b1b7ec985805e005055d1d471ca586a715ffc10a upstream.

For limiting the max frequency of gpu, the max freq tunable is not enough to hard limit the max gap. We now have also per client boost max freq. When this tunable was introduced, it was mistakenly made read only. Allow user to gain control by setting it writable.

Fixes 29ecd78d3b79 ("drm/i915: Define a separate variable and control for RPS waitboost frequency")
Cc Chris Wilson <[email protected]>
Cc Mika Kuoppala <[email protected]>
Cc Daniel Vetter <[email protected]>
Cc Jani Nikula <[email protected]>
Reviewed-by Chris Wilson <[email protected]>
Signed-off-by Mika Kuoppala <[email protected]>
Link http://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 73a798711314b54cbd4fe224e24db92c306a8d8c)
Signed-off-by Jani Nikula <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/gpu/drm/i915/i915_sysfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/gpu/drm/i915/i915_sysfs.c +1 -1
@@ -460,7 +460,7 @@ static ssize_t gt_min_freq_mhz_store(str
 
 static DEVICE_ATTR(gt_act_freq_mhz, S_IRUGO, gt_act_freq_mhz_show, NULL);
 static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
-static DEVICE_ATTR(gt_boost_freq_mhz, S_IRUGO, gt_boost_freq_mhz_show, gt_boost_freq_mhz_store);
+static DEVICE_ATTR(gt_boost_freq_mhz, S_IRUGO | S_IWUSR, gt_boost_freq_mhz_show, gt_boost_freq_mhz_store);
 static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store);
 static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store);

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/drm-i915-fix-setting-of-boost-freq-tunable.patch