Date: Fri, 27 Dec 2013 13:45:18 -0800 From: Tim Kientzle <tim@kientzle.com> To: Warner Losh <imp@bsdimp.com> Cc: Aleksandr Rybalko <ray@ddteam.net>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: HDMI output on Beaglebone black Message-ID: <A881E458-30CF-4B55-97A2-AEB560F1BD71@kientzle.com> In-Reply-To: <DDFDEBC3-ECAF-43AB-8CBF-BC10C766F29C@bsdimp.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>
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On Dec 27, 2013, at 12:01 PM, Warner Losh <imp@bsdimp.com> wrote: >=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. I don=E2=80=99t think we need that just to get a working console. I just skimmed through the AM335x TRM: http://www.ti.com/lit/ug/spruh73j/spruh73j.pdf 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. Tim
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