Date: Fri, 23 Aug 2019 22:05:04 +0300 From: Aleksandr Rybalko <ray@ddteam.net> To: Vijay Kumar Banerjee <vijaykumar9597@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Question regarding framebuffer driver. Message-ID: <CAJ1Oi8Gbw2F2%2Ba_Z2J29qkcZCRgvS4hk0NFA7g9uxNZBEQ9Utw@mail.gmail.com> In-Reply-To: <CAFgkNAkwUKyStkVzbRh2MLTOcHtO5yOBDZBH=Pmq6wv%2Bt-gXNA@mail.gmail.com> References: <CAFgkNAkwUKyStkVzbRh2MLTOcHtO5yOBDZBH=Pmq6wv%2Bt-gXNA@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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. =D0=B2=D1=82, 16 =D0=BB=D0=B8=D0=BF. 2019 =D0=BE 15:22 Vijay Kumar Banerjee= <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 something > 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 th= e > 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.org= " > --=20 WBW ------- Rybalko Aleksandr <ray@ddteam.net>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAJ1Oi8Gbw2F2%2Ba_Z2J29qkcZCRgvS4hk0NFA7g9uxNZBEQ9Utw>