[PATCH 2/7] drm/edid: Allow to ignore the audio EDID data

[Maxime Ripard]

On Mon, Mar 04, 2019 at 05:47:09PM +0200, Jani Nikula wrote:
> On Mon, 04 Mar 2019, Maxime Ripard <maxime.ripard at bootlin.com> wrote:
> > In some cases, in order to accomodate with displays with poor EDIDs, we
> > need to ignore that the monitor alledgedly supports audio output and
> > disable the audio output.
> 
> *sad trombone*
> 
> Trying to figure this out automatically in kernel is better than a
> quirk.
> 
> A quirk is better than requiring the user to provide an override EDID
> via the firmware loader (drm.edid_firmware parameter).
> 
> Requiring an override EDID is better than adding a module parameter.
> 
> I'd much rather we exhausted the other options before adding module
> parameters to address specific issues with EDIDs. That's a rabbit hole
> with no end.

We should also consider the usability of these solutions.

Sure, the quirks are the ideal solution long term, but do we really
expect the average user that just got its device from Amazon and
connected it to its display to figure out:

 - That if it's display doesn't work, it's because the display is
   broken
 - That it is broken due to poor EDIDs
 - To find out that it's supposed to be handled in DRM through a quirk
 - How to make such a quirk
 - How to recompile the kernel on its distro of choice
 - That they need to send a patch later on to upstream Linux, and then
   wait for a year or so (depending on their distro) before it's
   actually working.

Chances are that they would stop at 1, call the device trash and never
submit any quirk, therefore making the quirk approach useless in the
process.

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20190305/e91affaf/attachment.sig>