New Radeon DPM not working on E350 APU

[Bruce Guenter]

I am having problems using the new Radeon DPM patches on my AMD E-350
APU system. Running the kernel with radeon.dpm=0 works as expected (I
used it for several hours yesterday with no problems), but with
radeon.dpm=1 it locks up graphically as soon as X starts. I am able to
log in through the network though, and have retrieved a dmesg.

Visually, when X starts, the screen fills with non-moving colored random
static. After a few seconds, it changes color to red and then slowly
fades to white. No mouse pointer or anything else is visible.

The system is running Ubuntu Gnome 13.04. The kernel is 3.10.0 with the
latest agd5f/drm-next-3.11-wip merged in.

The two main differences between dmesg from a working boot and from a
failed one is the listing of the power states 0-5 and notes that it's
switching from the "boot" to "performance" power state; and then, later
when X starts, these errors:

radeon 0000:00:01.0: GPU lockup CP stall for more than 10000msec
radeon 0000:00:01.0: GPU lockup (waiting for 0x0000000000000003 last fence id 0x0000000000000001)
radeon 0000:00:01.0: fence driver on ring 5 use gpu addr 0x0000000000177118 and cpu addr 0xffffc90005318118
radeon 0000:00:01.0: Saved 55 dwords of commands on ring 0.
radeon 0000:00:01.0: GPU softreset: 0x00000009
radeon 0000:00:01.0:   GRBM_STATUS               = 0xB2433828
radeon 0000:00:01.0:   GRBM_STATUS_SE0           = 0x08000007
radeon 0000:00:01.0:   GRBM_STATUS_SE1           = 0x00000007
radeon 0000:00:01.0:   SRBM_STATUS               = 0x20000040
radeon 0000:00:01.0:   SRBM_STATUS2              = 0x00000000
radeon 0000:00:01.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
radeon 0000:00:01.0:   R_008678_CP_STALLED_STAT2 = 0x40000000
radeon 0000:00:01.0:   R_00867C_CP_BUSY_STAT     = 0x00008000
radeon 0000:00:01.0:   R_008680_CP_STAT          = 0x80228643
radeon 0000:00:01.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
radeon 0000:00:01.0: GRBM_SOFT_RESET=0x00007F6B
radeon 0000:00:01.0: SRBM_SOFT_RESET=0x00000100
radeon 0000:00:01.0:   GRBM_STATUS               = 0x00003828
radeon 0000:00:01.0:   GRBM_STATUS_SE0           = 0x00000007
radeon 0000:00:01.0:   GRBM_STATUS_SE1           = 0x00000007
radeon 0000:00:01.0:   SRBM_STATUS               = 0x20000040
radeon 0000:00:01.0:   SRBM_STATUS2              = 0x00000000
radeon 0000:00:01.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
radeon 0000:00:01.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
radeon 0000:00:01.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
radeon 0000:00:01.0:   R_008680_CP_STAT          = 0x00000000
radeon 0000:00:01.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
radeon 0000:00:01.0: GPU reset succeeded, trying to resume
[drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
radeon 0000:00:01.0: WB enabled
radeon 0000:00:01.0: fence driver on ring 0 use gpu addr 0x0000000018000c00 and cpu addr 0xffff8801f7fe6c00
radeon 0000:00:01.0: fence driver on ring 3 use gpu addr 0x0000000018000c0c and cpu addr 0xffff8801f7fe6c0c
radeon 0000:00:01.0: fence driver on ring 5 use gpu addr 0x0000000000177118 and cpu addr 0xffffc90005db2118
[drm] ring test on 0 succeeded in 0 usecs
[drm] ring test on 3 succeeded in 0 usecs
[drm] ring test on 5 succeeded in 1 usecs
[drm] UVD initialized successfully.
radeon 0000:00:01.0: GPU lockup CP stall for more than 10000msec
radeon 0000:00:01.0: GPU lockup (waiting for 0x0000000000000004 last fence id 0x0000000000000001)
[drm:r600_ib_test] *ERROR* radeon: fence wait failed (-35).
[drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on GFX ring (-35).
radeon 0000:00:01.0: ib ring test failed (-35).
radeon 0000:00:01.0: fence driver on ring 5 use gpu addr 0x0000000000177118 and cpu addr 0xffffc90005318118
radeon 0000:00:01.0: GPU softreset: 0x00000009
radeon 0000:00:01.0:   GRBM_STATUS               = 0xB3533828
radeon 0000:00:01.0:   GRBM_STATUS_SE0           = 0x2C000007
radeon 0000:00:01.0:   GRBM_STATUS_SE1           = 0x00000007
radeon 0000:00:01.0:   SRBM_STATUS               = 0x20000040
radeon 0000:00:01.0:   SRBM_STATUS2              = 0x00000000
radeon 0000:00:01.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
radeon 0000:00:01.0:   R_008678_CP_STALLED_STAT2 = 0x400C0000
radeon 0000:00:01.0:   R_00867C_CP_BUSY_STAT     = 0x00048000
radeon 0000:00:01.0:   R_008680_CP_STAT          = 0x80268643
radeon 0000:00:01.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
radeon 0000:00:01.0: GRBM_SOFT_RESET=0x00007F6B
radeon 0000:00:01.0: SRBM_SOFT_RESET=0x00000100
radeon 0000:00:01.0:   GRBM_STATUS               = 0x00003828
radeon 0000:00:01.0:   GRBM_STATUS_SE0           = 0x00000007
radeon 0000:00:01.0:   GRBM_STATUS_SE1           = 0x00000007
radeon 0000:00:01.0:   SRBM_STATUS               = 0x20000040
radeon 0000:00:01.0:   SRBM_STATUS2              = 0x00000000
radeon 0000:00:01.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
radeon 0000:00:01.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
radeon 0000:00:01.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
radeon 0000:00:01.0:   R_008680_CP_STAT          = 0x00000000
radeon 0000:00:01.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
radeon 0000:00:01.0: GPU reset succeeded, trying to resume
[drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
radeon 0000:00:01.0: WB enabled
radeon 0000:00:01.0: fence driver on ring 0 use gpu addr 0x0000000018000c00 and cpu addr 0xffff8801f7fe6c00
radeon 0000:00:01.0: fence driver on ring 3 use gpu addr 0x0000000018000c0c and cpu addr 0xffff8801f7fe6c0c
radeon 0000:00:01.0: fence driver on ring 5 use gpu addr 0x0000000000177118 and cpu addr 0xffffc90005c32118
[drm] ring test on 0 succeeded in 1 usecs
[drm] ring test on 3 succeeded in 1 usecs
[drm] ring test on 5 succeeded in 1 usecs
[drm] UVD initialized successfully.

-- 
Bruce Guenter <bruce at untroubled.org>                http://untroubled.org/
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