HDMI 4k support v2

[Ville Syrjälä]

On Wed, Aug 14, 2013 at 12:17:16AM +0100, Damien Lespiau wrote:
> Following up the first instance of this series:
>   http://lists.freedesktop.org/archives/dri-devel/2013-August/043125.html
> 
> Here is a v2 with Ville's review pass and a few additions:
>   - Alternate clock modes for 4k resolutions
>   - HDMI vendor specific infoframe support in drivers/video/hdmi.c
>   - Enabling of those vendor specific infoframes in the i915 driver

The patches I didn't explicitly comment on (01,05,09,12 by my reckoning) are:
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> Along the way, a tegra patch was needed for a small consolidation of the code
> packing vendor specific infoframes. This patch has only been compile-tested.
> 
> On Intel, it's possible to read back the programmed infoframe buffers with
> intel-gpu-tools' intel_infoframe and this gives:
> 
> Vendor InfoFrame:
> - frequency: every vsync
> - raw:
>   f4050181 000c0347 00000320 00000000
>   00000000 00000000 00000000 00000000
>   0000004c 00000000 00000000 00000000
>   00000000 00000000 00000000 00000000
> - vendor Id: 0x000c03 (HDMI)
> - video format: 0x001 
> - HDMI VIC: 3
> 
> after a $ xrandr --output HDMI1 --mode 3840x2160 -r 24
> 
> -- 
> Damien
> 
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-- 
Ville Syrjälä
Intel OTC