This is a note to let you know that I've just added the patch titled
drm/i915: Fix GMBUSFREQ on vlv/chv
to the 3.17-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-gmbusfreq-on-vlv-chv.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6be1e3d3ea29354d7c834a3936e796e185d5c73b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Thu, 16 Oct 2014 20:52:31 +0300
Subject: drm/i915: Fix GMBUSFREQ on vlv/chv
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From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
commit 6be1e3d3ea29354d7c834a3936e796e185d5c73b upstream.
vlv_cdclk_freq is in kHz but we need MHz for the GMBUSFREQ divider.
This is a regression from:
commit f8bf63fdcb1f82459dae7a3f22ee5ce92f3ea727
Author: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Fri Jun 13 13:37:54 2014 +0300
drm/i915: Kill duplicated cdclk readout code from i2c
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4470,7 +4470,7 @@ static void vlv_update_cdclk(struct drm_
* BSpec erroneously claims we should aim for 4MHz, but
* in fact 1MHz is the correct frequency.
*/
- I915_WRITE(GMBUSFREQ_VLV, dev_priv->vlv_cdclk_freq);
+ I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->vlv_cdclk_freq, 1000));
}
/* Adjust CDclk dividers to allow high res or save power if possible */
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-3.17/drm-i915-fix-gmbusfreq-on-vlv-chv.patch
queue-3.17/drm-i915-do-a-dummy-dpcd-read-before-the-actual-read.patch
queue-3.17/drm-i915-properly-reenable-gen8-pipe-irqs.patch
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