Date: Sun, 23 Mar 2014 19:34:08 -0700 From: Oleksandr Tymoshenko <gonzo@bluezbox.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: HDMI output on Beaglebone black Message-ID: <536748F0-FE1C-42CD-B33A-D7484282D840@bluezbox.com> In-Reply-To: <7C58B233-1E84-47A3-ABB2-0038928BB1B2@bluezbox.com> References: <CAASDrVnu-0vJsnnp-rEQAT6dkg3eyNcjTejYzwwaKDpfkzFXdw@mail.gmail.com> <7C58B233-1E84-47A3-ABB2-0038928BB1B2@bluezbox.com>
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On Dec 26, 2013, at 1:18 PM, Oleksandr Tymoshenko <gonzo@bluezbox.com> wrote: > > On 2013-12-25, at 9:08 PM, "Lundberg, Johannes" <johannes@brilliantservice.co.jp> wrote: > >> Hi >> >> According to the readme for Beaglebone Black in crochet-freebsd there is no >> support for HMDI output yet (as of Dec 2013). >> >> Does anyone know what is required to make this work? > > You need to write driver for NXP TDA19988 HDMI (LCD to HDMI converter), driver > for LCD controller and vt/syscons wrapper. Also properly pinmux LCD pins in .dts. > > I did some experiments few months back but didn't get far: > http://people.freebsd.org/~gonzo/arm/patches/bbb-tda.diff I got a little bit further with this and thought I’d better post my WIP before somebody wastes his/her time fixing things that’s already fixed. Here is diff of my work dir: http://people.freebsd.org/~gonzo/arm/patches/tda19988.diff There are several problems fixed comparing to first patch: - Fixed HDMI controller I2C address - Register write should be one I2C transaction - Current TI I2C driver can’t read more bytes than FIFO length. I moved read/write handler to ithread, instead of notifying requesting thread with wakeup. Kernel with this patch can read and parse EDID. I failed to get video output working even with test pattern (part of code commented by "#if 0”). Part of this code is direct copy-paste from linux driver just to get something working before re-coding it properly.home | help
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