[Intel-gfx] [PATCH] drm/i915: Extract physical display dimensions from VBT

[Stephen J]

I can confirm that this v2 patch, combined with the change to the xorg
driver is enough for X to report the correct display dimensions for
my Surface 3 device.

Thank you,
Stephen

On Tue, May 31, 2016 at 3:08 AM, <ville.syrjala at linux.intel.com> wrote:

> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> The VBT has these mysterious H/V image sizes as part of the display
> timings. Looking at some dumps those appear to be the physical
> dimensions in mm. Which makes sense since the timing descriptor matches
> the format used by EDID detailed timing descriptor, which defines these
> as "H/V Addressable Video Image Size in mm".
>
> So let's use that information from the panel fixed mode to get the
> physical dimensions for LVDS/eDP/DSI displays. And with that we can
> fill out the display_info so that userspace can get at it via
> GetConnector.
>
> v2: Use (hi<<8)|lo instead of broken (hi<<4)+lo
>     Handle LVDS and eDP too
>
> Cc: Stephen Just <stephenjust at gmail.com>
> Tested-by: Stephen Just <stephenjust at gmail.com> (v1)
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96255
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
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