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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 24 Jan 2019
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      Apparently the Raspberry Pi camera has a DRM chip in it to stop anyone else from designing or producing third party cameras. https://www.raspberrypi.org/forums/viewtopic.php?t=149426 … WTF‽ I think I'm going to start calling it the Raspberry iPi. Why the hell is this garbage in an *educational* product?

      12 replies 94 retweets 251 likes
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    2. Mr Robit‏ @therobotbuilder 24 Jan 2019
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      Replying to @marcan42

      I'm confused, isn't the interface a MIPI / CSI and therefore anyone can roll their own camera and drivers?

      1 reply 0 retweets 2 likes
      Hector Martin‏ @marcan42 24 Jan 2019
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      Replying to @therobotbuilder

      They stuck an authentication chip in their camera and apparently check for it in their (closed source) GPU firmware that talks to the CSI interface and image acquisition hardware.

      8:38 AM - 24 Jan 2019
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      4 replies 1 retweet 18 likes
        1. Mr Robit‏ @therobotbuilder 24 Jan 2019
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          Replying to @marcan42

          . . . Oh, I see.pic.twitter.com/cTAupxINCs

          0 replies 0 retweets 1 like
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        1. Dylanger Daly‏ @DylangerDaly 24 Jan 2019
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          Replying to @marcan42 @therobotbuilder

          Can you not use another interface? Or is CSI the best possible way to capture images to the Pi?

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        2. Reinis Veips‏ @festlv 24 Jan 2019
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          Replying to @marcan42 @therobotbuilder

          I've had a discussion with third party camera vendor for RaspberryPi- the auth chip is required for the camera with Sony sensor (the v2). Third parties can get the chip supplied by Pi foundation (obviously, at a cost).

          1 reply 0 retweets 5 likes
        3. Tom Fleet‏ @tomfleet 15 Jul 2020
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          Replying to @festlv @marcan42 @therobotbuilder

          I saw some words that said it was unlocking a tuning config or something that was proprietary, at a cost to the foundation. Does the Sony silicon function *at all* without it - as in, with a basic config, perhaps reduced performance? Or does it not init at all?

          1 reply 0 retweets 0 likes
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        1. Reinis Veips‏ @festlv 24 Jan 2019
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          Replying to @marcan42 @therobotbuilder

          And, I'm pretty sure it hangs on the I2C bus which is used for sensor configuration.

          0 replies 0 retweets 0 likes
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