This is will also be caught as dark screen. Regards, Nemesa > -----Original Message----- > From: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > Sent: Monday, October 30, 2023 3:50 PM > To: Garg, Nemesa <nemesa.garg@xxxxxxxxx>; intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Subject: RE: [v2 1/2] drm/i915/display: Add support for darskscreen > detection > > On Mon, 30 Oct 2023, "Garg, Nemesa" <nemesa.garg@xxxxxxxxx> wrote: > > Hi Jani, > > > > Sometimes there is an issue of black screen on the display due to number of > errors like invalid input buffers (black), some issue with display programming (no > planes enabled, LUTs zeroed) which means some problem with DE. Upon > detection following steps can be taken: > > 1.Print in dmesg so user can be aware of this issue upon checking the > > logs 2. Correction steps can be taken and the design is in progress and will come > up with follow up patches. > > And if the user wants to show a black screen? Does this feature flag an error? > > BR, > Jani. > > > > > > Thanks and Regards, > > Nemesa > > > >> -----Original Message----- > >> From: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > >> Sent: Friday, October 27, 2023 4:40 PM > >> To: Garg, Nemesa <nemesa.garg@xxxxxxxxx>; > >> intel-gfx@xxxxxxxxxxxxxxxxxxxxx > >> Subject: Re: [v2 1/2] drm/i915/display: Add support for > >> darskscreen detection > >> > >> On Fri, 27 Oct 2023, Nemesa Garg <nemesa.garg@xxxxxxxxx> wrote: > >> > Darkscreen detection checks if all the pixels of the frame are less > >> > then or equal to the comparision value. The comparision value is > >> > set to 256 i.e black. So upon getting black pixels from the pipe, > >> > the dark screen detect bit is set and an error message will be printed. > >> > >> Okay, this still describes *what* the patch does, but not *why*. Why > >> do we need this? What for? > >> > >> (Please just reply here for starters, instead of resending.) > >> > >> > >> BR, > >> Jani. > >> > >> > >> -- > >> Jani Nikula, Intel > > -- > Jani Nikula, Intel
