On Friday 19 October 2001 06:13 pm, Manuel Teira wrote: > Well, after some tests, it seems that the problem was caused by the FIFO > size. This was one of the differences between running the little module > (ati_mach64gui.o) under or without X (this is because in the 2D driver, > GUI_CNTL is set to zero when pATI->Chip >= ATI_CHIP_264VT4, in order to use > the max possible fifo depth, 192) . Furthermore, I tested that once X has > run, the DMA test in ati_mach64gui didn't work anymore with or without X > (because the FIFO depth was changed before). > > So, I was able to simulate the same behaviour clearing GUI_CNTL (exactly > the 0 and 1 bits: CMDFIFO_SIZE_MODE, that was set to one by the 2D driver) > in the ati_mach64gui.o. I changed the DRI driver to set the 0 bit in > GUI_CNTL (that is the default value, and, after this, reading GUI_STAT, as > is said in the documentation), and it didn't work. So, I changed some other > things in the DRI driver: set the busmastering in the init function and not > in the bm_test one, removed the call to the dump_engine_info and changed > some register manipulations. After this, the BusMastering test worked and > finally: PAT_REG0=0x22222222 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
This is cool. I've been swamped for quite a bit (this week, I'd not really even had time to pull my e-mail (over 300 messages in my in box...) so I couldn't do much of anything (sorry for the silence gang...). I suspected that this was the problem, but I'd had a problem with the old code that I thought was due to something stupid that I did so I was going to take your newer code and work from that to see if I was right- ran out of personal time on my end (my "employer" has not been making payroll for the past month and half- so I've been doing other things to keep my family afloat...) so I didn't follow up. > I'm attaching the mach64_dma.c in this mail, so anyone can check it in > another machine. I plan on using it to check and do some further cleanups with the 2D driver so that we don't have other "surprises". Thanks for the code. -- Frank Earl _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
