DRI not working, AMD E 300 with Radeon HD 6310

[Felix Palmen]

Am Mittwoch, 19. November 2014, 10:41:03 schrieben Sie:
> I've found numerous posts about 'how buggy' the HD 6310 is, for example
> mozilla.org mailing lists (posters there claiming it's the worst). The
> PALM firmware is supposedly Northern Islands series, the 6310 seems to
> have been manufactured about the time these were introduced on the market.
> Radeon support has been further developed since 3.8. But it's some work to
> import the code, which may be an understatement, I'm definitely not an
> expert but casual browsing it seems the threading calls need changed, and
> these drivers use the i2c interface which AFAIK has been deprecated in
> FreeBSD for some time.

Ok, this sounds quite bad. Just out of curiosity: what's the replacement for 
i2c then? This would require a major porting effort? I'm still a little 
confused by the fact someone obviously tested the HD 6310 successfully, 
according to the wiki page.

Meanwhile, still waiting for buildworld to finish, I found this:
https://bugs.freedesktop.org/show_bug.cgi?id=66963#c175

Different chip, different OS, but at least same error. I prepared a similar 
patch against freebsd head (completely disabling the DMA ring for my chip) 
just for testing purposes. I'll report here whether this does any good, just 
in case someone else faces the same problem. Of course, this is an ugly hack, 
intentionally disabling a feature in the driver, but if it really helps, I 
could polish the patch so it only affects exactly the 0x9802 chip. But, let's 
see first...

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