[PATCH v4 14/16] drm: bridge: analogix/dp: try force hpd after plug in lookup failed

Rob Herring
2015-09-03T21:55:59Z

On Thu, Sep 3, 2015 at 3:47 AM, Thierry Reding <treding@nvidia.com> wrote:
> On Wed, Sep 02, 2015 at 03:17:57PM -0500, Rob Herring wrote:
> [...]
>> Are there any eDP panels which don't have EDID and need panel details in DT?
>
> Most panels need information other than EDID. They typically have some
> requirements regarding the power up sequence that aren't to be found
> anywhere in EDID or detectable by some other mechanism. A decision was
> therefore made a long time ago to require panels to be listed in DT with
> a specific compatible string. That way all of these details can be
> stashed away in drivers that know how to deal with these kinds of
> details.

I guess I was being hopeful that eDP was improving that situation.

Rob