[PATCH 1/3] drm: add connector info/property for non-std displays

[Alex Deucher]

On Mon, Oct 16, 2017 at 5:24 AM, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Mon, Oct 16, 2017 at 04:50:16PM +1000, Dave Airlie wrote:
>> On 16 October 2017 at 16:41, Thierry Reding <thierry.reding at gmail.com> wrote:
>> > On Mon, Oct 16, 2017 at 02:29:07PM +1000, Dave Airlie wrote:
>> >> From: Dave Airlie <airlied at redhat.com>
>> >>
>> >> This adds the infrastructure needed to quirk displays
>> >> using edid and to mark them a non-standard.
>> >>
>> >> A non-standard display is one which doesn't work like
>> >> a normal rectangular monitor or requires some transformation
>> >> of the output by the rendering process to make sense.
>> >>
>> >> This is meant to cover head mounted devices like HTC Vive.
>> >>
>> >> Signed-off-by: Dave Airlie <airlied at redhat.com>
>> >> ---
>> >>  drivers/gpu/drm/drm_connector.c | 13 +++++++++++++
>> >>  drivers/gpu/drm/drm_edid.c      |  8 ++++++--
>> >>  include/drm/drm_connector.h     |  5 +++++
>> >>  include/drm/drm_mode_config.h   |  7 +++++++
>> >>  4 files changed, 31 insertions(+), 2 deletions(-)
>> >
>> > "non-standard" seems very ambiguous to me. If this is targetting HMDs in
>> > particular, perhaps we can borrow a term from that. Without being really
>> > familiar with that technology, a quick Google search suggests that these
>> > devices are commonly referred to as operating in "direct mode". Perhaps
>> > a boolean "direct-mode" property would be less ambiguous?
>>
>> I'm not sure direct-mode is any less ambiguous, I'm loathe to tie generic
>> features to specific technologies if we can avoid it, there may be other
>> requirements for connected displays we don't want to display on without
>> some special app that aren't HMDs.
>>
>> I agree non-standard is a bit ambiguous, but I'm not happy direct mode
>> gives me any more useful info, anyone else got a name?
>
> I'd have just gone with HMD. We're really bad at predicting the future,
> every time we try to make things a bit too generic it bites us. And think
> for leases it makes sense (since people are already talking about other
> uses than just HMD pass-through), but for this prop, not so much.

I'd vote for HMD too.  non-standard is too ambiguous.

Alex

> -Daniel
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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