Date: Mon, 26 Aug 2019 00:57:59 +0530 From: Vijay Kumar Banerjee <vijaykumar9597@gmail.com> To: Aleksandr Rybalko <ray@ddteam.net> Cc: freebsd-hackers@freebsd.org Subject: Re: Question regarding framebuffer driver. Message-ID: <CAFgkNA=VxWP88NzNipxxXKJUpTZV6PVfQxdKACVgCQeFapZVhw@mail.gmail.com> In-Reply-To: <CAJ1Oi8Gbw2F2%2Ba_Z2J29qkcZCRgvS4hk0NFA7g9uxNZBEQ9Utw@mail.gmail.com> References: <CAFgkNAkwUKyStkVzbRh2MLTOcHtO5yOBDZBH=Pmq6wv%2Bt-gXNA@mail.gmail.com> <CAJ1Oi8Gbw2F2%2Ba_Z2J29qkcZCRgvS4hk0NFA7g9uxNZBEQ9Utw@mail.gmail.com>
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On Sat, Aug 24, 2019 at 12:35 AM Aleksandr Rybalko <ray@ddteam.net> wrote: > Hi Vijay! > > vt_fb driver is a simple consumer, it just use passed info about location > of FrameBuffer in memory and its properties, like width/height/colors/etc= . > So if display keeps blank, you have to check correctness of passed data. > Or maybe even writing driver that prepare graphic subsystem to work with > FB. > > Thanks. > > Hi Aleksandr, Thanks for the reply, I checked the data and it was alright. The screen wasn't even turning on, I figured out that the problem was in pinmuxing. The problem is now solved when I ported the pinmux driver correctly. Thanks and regards, Vijay > =D0=B2=D1=82, 16 =D0=BB=D0=B8=D0=BF. 2019 =D0=BE 15:22 Vijay Kumar Banerj= ee <vijaykumar9597@gmail.com> > =D0=BF=D0=B8=D1=88=D0=B5: > >> Hello everyone, >> >> I'm working on porting the framebuffer driver to RTEMS with Beaglebone >> Black as the target device. I have have already ported the am335x_lcd, >> tda19988, fbd and VT drivers, but the screen doesn't seem to "power up". >> From the FreeBSD bootlog (12-RELEASE), I see that the screen is >> turning on after the VT initialization message, so I guess it's somethin= g >> that happens after the vt initialization that turns the screen on. >> >> So far I have ported the vt_fb and vt_core and it boots up well with the >> message : >> VT: initialize with new VT driver "fb". >> >> But the screen doesn't seem to turn on. Can someone please tell me >> or point me to the right place in code that is responsible for turning t= he >> screen on after VT initialization? >> >> Thank you, >> Vijay >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.or= g >> " >> > > > -- > WBW > ------- > Rybalko Aleksandr <ray@ddteam.net> > >
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