Re: Backport of CDCLK/Haswell patches

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At Fri, 31 Oct 2014 12:07:13 +0100,
Jiri Slaby wrote:
> 
> On 10/08/2014, 10:09 AM, David Henningsson wrote:
> > Hi stable maintainers,
> > 
> > These two patches: c149dcb5c60bfea8871f16dfcc0690255eeb825f
> > drm/i915: provide interface for audio driver to query cdclk
> > and
> > e4d9e513dedb5ac4e166c1053314fa935ddecc8c
> > ALSA: hda - restore BCLK M/N value as per CDCLK for HSW/BDW display HDA
> > controller
> > 
> > ...never seem to have made it into 3.12+ stable kernels. They fix an
> > issue where playback rate over Haswell HDMI audio can be faster than
> > normal.
> > 
> > Now, the latter of these two patches requires a restructure of moving
> > things from hda_intel.c to hda_priv.h, which looked tedious and
> > potentially error-prone to backport in itself, so instead I rewrote the
> > function slightly, see attachment.
> > 
> > Do you think this is a reasonable approach?
> 
> I seem not to find out a way to apply those to 3.12 cleanly :/. Any
> ideas/help appreciated.

FWIW, SLE12 has already three backported patches relevant with this:

patches.drivers/drm-i915-HD-audio-Don-t-continue-probing-when-nomode
	for 74b0c2d75fb4cc89173944e6d8f9eb47aca0c343
patches.drivers/drm-i915-provide-interface-for-audio-driver-to-query
	for c149dcb5c60bfea8871f16dfcc0690255eeb825f
patches.drivers/hda-0038-restore-BCLK-M-N-value-as-per-CDCLK-for-HSW
	for e4d9e513dedb5ac4e166c1053314fa935ddecc8c

The first one changes the i915 function type, so this may conflict
with David's backport.


Takashi
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