https://bugs.freedesktop.org/show_bug.cgi?id=59945

Priority: medium Bug ID: 59945 Assignee: dri-devel@lists.freedesktop.org Summary: Launching weston fails with error "radeon 0000:01:00.0: forbidden register 0x00008040 at 558" Severity: normal Classification: Unclassified OS: Linux (All) Reporter: g02maran@gmail.com Hardware: x86-64 (AMD64) Status: NEW Version: XOrg CVS Component: DRM/Radeon Product: DRI

Created attachment 73742 --> https://bugs.freedesktop.org/attachment.cgi?id=73742&action=edit patch

When i looked up register 0x00008040 i saw that it was defined as WAIT_UNTIL.

The function that prints that error is 'evergreen_cs_check_reg' in evergreen_cs.c. Since the WAIT_UNTIL is not present in reg_srcs/cayman (i have a radeon 6950) the cayman_reg_safe_bm test fail and since WAIT_UNTIL is not present in any of the switch cases it hits the default case.

But WAIT_UNTIL was present in reg_srcs/evergreen, so i copied the WAIT_UNTIL line from evergreen to cayman. I also copied the rest of the WAIT_UNTIL_POLL* because they seemed related.

This fixed the issue for me but i do not know if this is the proper fix.

Tested on kernel 3.8.0-rc5 and wayland/weston master and mesa master.