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: >=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 > 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=1B$B!G=1B(Bd better = post my WIP before somebody=20 wastes his/her time fixing things that=1B$B!G=1B(Bs already fixed. Here is diff of my work dir:=20 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=1B$B!G=1B(Bt read more bytes than FIFO = length. I moved read/write=20 handler to ithread, instead of notifying requesting thread with = wakeup. Kernel with this patch can read and parse EDID. I failed to get video output working even with test pattern (part of code commented by "#if = 0=1B$B!I=1B(B).=20 Part of this code is direct copy-paste from linux driver just to get = something=20 working before re-coding it properly.=
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