Re: [Intel-gfx] [PATCH 2/3] drm/i915: hide errors when probing for a reverse display port

Benjamin Tissoires
2015-07-29T15:20:26Z

On Jul 28 2015 or thereabouts, Chris Wilson wrote:
> On Tue, Jul 28, 2015 at 12:03:28PM -0400, Benjamin Tissoires wrote:
> > We check the polarity of the attached dp, so it is normal to fail.
> > Do not send errors to the users.
>
> if (probe) DRM_DEBUG else DRM_ERROR is fairly offensive.
>
> It strikes me that you could make each of these functions report the
> failure to the caller (have the caller even do so error handling!) and
> as part of that have the caller report an error and so demote all of
> these to DRM_DEBUG_KMS().

Yes, sorry for that. I will change it to return an actual error code and
the error string if I still need to use these functions given Sivakumar
ideas.

>
> Who knows, actually doing some error handling may make monitor training
> more reliable! Or we may even get carried away and report the failure
> all the way back to userspace.

That would be a very good improvement indeed. But I can already tell you
that I will not do it by myself, I already have too much on my plate.
I'll do my share for this feature, but don't count on me for the whole
error handling rewrite :)

Cheers,
Benjamin