[Intel-gfx] [PATCH] drm/i915: be sure panel is powered up in eDP configs

Jesse Barnes jbarnes at virtuousgeek.org
Thu Jul 22 22:19:50 CEST 2010

On Wed, 14 Jul 2010 15:40:56 -0700
Jesse Barnes <jbarnes at virtuousgeek.org> wrote:

> Fixes https://bugs.freedesktop.org/show_bug.cgi?id=28739.  We need to
> enable power to the panel with the AUX VDD bit in order to properly
> detect the eDP attached panel, and we also need to turn the panel on in
> case it was off when we started (as happens at resume time).
> But this patch raises a couple of questions:
>   1) why does the first panel on sequence time out?
>   2) why do I need to unlock the panel protected regs?
> Keith, I think this is your code, any ideas?

Just posted a more minimal fix and separated out the register patch.
Apparently we just need to unlock the panel regs around the actual
power on sequence.  Talking with the hw guys about this now as there
may be a better workaround to the broken panel sequencing logic.

Jesse Barnes, Intel Open Source Technology Center

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