[PATCH v4 2/6] apple-gmux: Add switch_ddc support

[Darren Hart]

On Fri, Aug 14, 2015 at 06:18:55PM +0200, Lukas Wunner wrote:
> Originally by Seth Forshee <seth.forshee at canonical.com>, 2012-10-04:
>     The gmux allows muxing the DDC independently from the display, so
>     support this functionality. This will allow reading the EDID for the
>     inactive GPU, fixing issues with machines that either don't have a
>     VBT or have invalid mode data in the VBT.
> 
> Modified by Lukas Wunner <lukas at wunner.de>, 2015-10-07:
>     Advertise ->switch_ddc handler callback only on the pre-retina
>     Macbook Pro. The retina uses eDP and its mux is incapable of
>     switching the AUX channel separately from the main link.
>     It's an NXP CBTL06142 (alternate parts: TI HD3SS212,
>     Pericom PPI3VDP12412).
> 
>     Sources:
>     http://www.electronicproducts.com/-whatsinside_text-145.aspx
>     http://slideshare.net/jjwu6266/apple-2012-wwdc-apple-macbook-pro-with-retina-display
>     http://www.techrepublic.com/blog/cracking-open/teardown-shows-retina-macbook-pro-is-nearly-impossible-to-upgrade-difficult-to-work-on/
> 
>     Datasheets:
>     http://www.nxp.com/documents/data_sheet/CBTL06141.pdf
>     http://www.ti.com/lit/ds/symlink/hd3ss212.pdf
>     https://www.pericom.com/assets/Datasheets/PI3VDP12412.pdf
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88861
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61115
> Tested-by: Lukas Wunner <lukas at wunner.de>
>     [MBP  9,1 2012  intel IVB + nvidia GK107  pre-retina  15"]
> 
> Cc: Seth Forshee <seth.forshee at canonical.com>
> Signed-off-by: Lukas Wunner <lukas at wunner.de>

For platform/drivers/x86:

Acked-by: Darren Hart <dvhart at linux.intel.com>

Daniel, I presume this will ultimately get pulled in by you with the rest of the
series?
-- 
Darren Hart
Intel Open Source Technology Center