[Intel-gfx] [PATCH 1/4] drm/edid: add helper function to detect monitor audio capability

Ben Skeggs skeggsb at gmail.com
Tue Oct 19 00:24:41 PDT 2010

On Sun, 2010-09-19 at 15:56 +0800, Zhenyu Wang wrote:
> On 2010.09.19 08:38:07 +0100, Chris Wilson wrote:
> > 
> > This should be cc'ed for Adam Jackson's attention as well.
> yep, I think I cc-ed ajax in git-send-mail command line...I'll amend the commit.
> > > +bool drm_detect_monitor_audio(struct edid *edid)
> > 
> > drm_edid_has_monitor_audio()? That is a little more self-descriptive.
> > (I also think drm_detect_hdmi_monitor is poorly named.)
> yeah, that looks better. thanks.
> > The last time Adam had a chance to comment on this EDID check, he
> > suggested that we cannot rely on has_audio being a reliable indicator of
> > the sink's properties. If the EDID has no audio support, then return
> > early, otherwise perform the secondary check that extension block contains
> > audio data.
> That's also the problem we stuck for quite some time, and until recently
> we got reply on this issue. Adam is right, 'basic audio' bit might not be
> reliable, so we try to search audio block too, if there's any existence,
> we will accept 'basic audio' support as well.
Also, would you be able to export drm_find_cea_extension(), I have
pending nouveau patches that will require this symbol (to build a HDA
ELD from the EDID data for HDMI/DP audio).

With that, you can add my Reviewed-by :)

> Thanks for the review!
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