Date: Fri, 27 Dec 2013 14:46:32 -0700 From: Warner Losh <imp@bsdimp.com> To: Tim Kientzle <tim@kientzle.com> Cc: Aleksandr Rybalko <ray@ddteam.net>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: HDMI output on Beaglebone black Message-ID: <A1E215AD-F0E1-44D5-9654-BE724E4467A7@bsdimp.com> In-Reply-To: <A881E458-30CF-4B55-97A2-AEB560F1BD71@kientzle.com> References: <CAASDrVnu-0vJsnnp-rEQAT6dkg3eyNcjTejYzwwaKDpfkzFXdw@mail.gmail.com> <7C58B233-1E84-47A3-ABB2-0038928BB1B2@bluezbox.com> <FB96D3DB-3DC2-4D5F-B83F-CF294F69F93D@kientzle.com> <29b6bc61-c513-4d98-8aed-4e1ea6ebe4da@email.android.com> <DDFDEBC3-ECAF-43AB-8CBF-BC10C766F29C@bsdimp.com> <A881E458-30CF-4B55-97A2-AEB560F1BD71@kientzle.com>
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On Dec 27, 2013, at 2:45 PM, Tim Kientzle wrote: >=20 > On Dec 27, 2013, at 12:01 PM, Warner Losh <imp@bsdimp.com> wrote: >=20 >>=20 >> On Dec 27, 2013, at 1:37 AM, Aleksandr Rybalko wrote: >>=20 >>> Tim Kientzle <tim@kientzle.com> =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0= =B2(=D0=BB=D0=B0): >>>>=20 >>>> On Dec 26, 2013, at 1:18 PM, Oleksandr Tymoshenko = <gonzo@bluezbox.com> >>>> wrote: >>>>=20 >>>>>=20 >>>>> On 2013-12-25, at 9:08 PM, "Lundberg, Johannes" >>>> <johannes@brilliantservice.co.jp> wrote: >>>>>=20 >>>>>> Hi >>>>>>=20 >>>>>> According to the readme for Beaglebone Black in crochet-freebsd >>>> there is no >>>>>> support for HMDI output yet (as of Dec 2013). >>>>>>=20 >>>>>> Does anyone know what is required to make this work? >>>>>=20 >>>>> You need to write driver for NXP TDA19988 HDMI (LCD to HDMI >>>> converter), driver=20 >>>>> for LCD controller and vt/syscons wrapper. Also properly pinmux = LCD >>>> pins in .dts. >>>>=20 >>>> Does newcons make this any simpler? >>>=20 >>> Yup, much simpler. >>> You only have to fill fb_info struct and call fbd to attach or = attach fbd child. >>=20 >> Chances are we'll need to create an Android graphics interface = module. Most of the GPUs are programmed with binary blobs that we'll = have no hope of getting. However, the interface to Android is fairly = standard so we should be able to leverage off that. >=20 > I don=E2=80=99t think we need that just to get a working console. >=20 > I just skimmed through the AM335x TRM: > http://www.ti.com/lit/ug/spruh73j/spruh73j.pdf >=20 > It looks like there=E2=80=99s enough information there to bring up a > basic frame buffer through the LCD controller (Chapter 13). > That should suffice. That's true for this SoC... For others we'll not likely be so likely...=20= Warner=
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