Leigh, See this bug report:
https://bugzilla.yoctoproject.org/show_bug.cgi?id=7719 specifically the TFP401 and TFP501 chips from TI are not working with the MinnowBoard Max. the issue appears to be a firmware , not hardware issue, and is being worked on… thanks Dave From: elinux-MinnowBoard [mailto:[email protected]] On Behalf Of Leigh Gawne Sent: Sunday, June 7, 2015 2:43 AM To: MinnowBoard Development and Community Discussion Subject: Re: [MinnowBoard] HDMI level shifters and revision A4 Hi Dave, I am using the TI TFP401 as the DVI decoder. I thought about spinning another revision of the board with an additional level shifter, but given that these are present on the A4 revision, my preference is just to get this revision and everything should play nice. Thanks, Leigh On 6 Jun 2015 11:21 pm, "Anders, David" <[email protected]<mailto:[email protected]>> wrote: Leigh, We have found that there are some DVI receiver chips that are of issue with the minnowboard max. which chipset are you using to covert from HDMI/DVI to LVDS? Dave From: elinux-MinnowBoard [mailto:[email protected]<mailto:[email protected]>] On Behalf Of Leigh Gawne Sent: Saturday, June 6, 2015 6:46 AM To: [email protected]<mailto:[email protected]> Subject: [MinnowBoard] HDMI level shifters and revision A4 Hi guys, I have a customised daughterboard for the Minnoxboard Max which includes an HDMI to LVDS subsystem. During test, I have found that some boards are unable to drive the connected LCD display panel. Further investigation leads me to believe that it is the missing level shifters on the Minnowboard Max which mean that this is not working as expected (connecting other HDMI sources to the board, i.e. PC, etc. work absolutely fine. Inspection of the diff pair levels on a scope shows that it is definitely marginal). I understand that revision A4 of the board (https://bugzilla.yoctoproject.org/show_bug.cgi?id=7027) will include these level shifters. My question is whether this revision of the board is available yet, and if so, how I couple go about ordering a couple of them for test to ensure it solves my problem. I purchase around 10 boards around a month or so ago, and these are all revision A2. Any insights or additional information would be most helpful. Regards, Leigh _______________________________________________ elinux-MinnowBoard mailing list [email protected]<mailto:[email protected]> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
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