On 1/13/07, Phillip Ezolt <[EMAIL PROTECTED]> wrote: > Michel, > > On 1/12/07, Michel Dänzer <[EMAIL PROTECTED]> wrote: > > > > > > > > > 4) Is there a simple command that I can issue to the CP to clear the > > > screen JUST to see if it is issuing any commands from the ring buffer > > > at all? > > > > You could do something along the lines of radeon_test_writeback: write > > to a scratch register via the CP and verify by reading the register > > directly. Actually, doing something like that from radeon_do_init_cp and > > returning an error if it fails might generally help to handle CP > > initialization issues more gracefully. > > Do you have any idea what that command stream would look like? > > Is it something like this: > > BEGIN_RING(2); > OUT_RING( CP_PACKET0( RADEON_SCRATCH_REG5, 0 ) ); \ > OUT_RING( 0xDEADBEEF); \ > ADVANCE_RING() > COMMIT_RING()
Should be do the work, then you read the scratch reg via MMIO to see if the value was set. > > > 1) The fglrx driver never sets the (RADEON_CP_RB_RPTR_ADDR) register. > > > If I read the register back when fglrx is running, it is set to "0". > > > > > > What does that register indicate? > > > > You can ignore scratch register writeback for now. You may want to load > > the radeon kernel module with no_wb=1 though to prevent the unlikely > > event that it intervenes with anything. > > Ok. I'll try that. > ... > BTW. I have some code (based on bitfield) which automatically decodes the > register traces from libsegfault, and gives me the names of the regs and the > fields. It makes reading the trace much easier. > > Is there some place I can put that on the freedesktop servers? I don't think there is any place for this except user account, you could send it to me and i will put it in mine. best, Jerome Glisse ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
