[Bug 66963] r600: linux 3.11RC isn't booting with radeon.dpm=1 option in grub

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66963

--- Comment #69 from Hrvoje Senjan <hrvoje.senjan at gmail.com> ---
(In reply to comment #60)
> (In reply to comment #59)
> > please try this branch:
> > http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-fixes-3.11
> > after a cold shutdown.
> 
> This seems to have fixed the issues here :-)
> 

Works correctly only on cold boot. With reboots i get:

[   52.630102] radeon 0000:01:00.0: GPU lockup CP stall for more than 27055msec
[   52.630115] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000058
last fence id 0x0000000000000001)
[   52.993495] radeon 0000:01:00.0: Saved 2809 dwords of commands on ring 0.
[   52.993508] radeon 0000:01:00.0: GPU softreset: 0x00000348
[   52.993511] radeon 0000:01:00.0:   R_008010_GRBM_STATUS      = 0xA0003030
[   52.993514] radeon 0000:01:00.0:   R_008014_GRBM_STATUS2     = 0x00000003
[   52.993517] radeon 0000:01:00.0:   R_000E50_SRBM_STATUS      = 0x200291C0
[   52.993520] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[   52.993523] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[   52.993526] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000802
[   52.993528] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x800000C1
[   52.993531] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[   53.369474] radeon 0000:01:00.0: Wait for MC idle timedout !
[   53.369478] radeon 0000:01:00.0: R_008020_GRBM_SOFT_RESET=0x00004001
[   53.369532] radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00022500
[   53.371674] radeon 0000:01:00.0:   R_008010_GRBM_STATUS      = 0xA0003030
[   53.371677] radeon 0000:01:00.0:   R_008014_GRBM_STATUS2     = 0x00000003
[   53.371680] radeon 0000:01:00.0:   R_000E50_SRBM_STATUS      = 0x200210C0
[   53.371683] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[   53.371685] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[   53.371688] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
[   53.371691] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80100000
[   53.371694] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[   53.371700] radeon 0000:01:00.0: GPU reset succeeded, trying to resume
[   53.536342] [drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
[   53.536389] radeon 0000:01:00.0: WB enabled
[   53.536393] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr
0x0000000020000c00 and cpu addr 0xffff880137055c00
[   53.536396] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr
0x0000000020000c0c and cpu addr 0xffff880137055c0c
[   53.734069] [drm:r600_ring_test] *ERROR* radeon: ring 0 test failed
(scratch(0x8504)=0xCAFEDEAD)
[   53.734073] [drm:r600_resume] *ERROR* r600 startup failed on resume
[   53.736171] switching from power state:
[   53.736176]  ui class: none
[   53.736180]  internal class: boot 
[   53.736184]  caps: video 
[   53.736189]  uvd    vclk: 0 dclk: 0
[   53.736193]          power level 0    sclk: 60000 mclk: 50000 vddc: 1100
[   53.736196]          power level 1    sclk: 60000 mclk: 50000 vddc: 1100
[   53.736199]          power level 2    sclk: 60000 mclk: 50000 vddc: 1100
[   53.736201]  status: c b 
[   53.736206] switching to power state:
[   53.736208]  ui class: performance
[   53.736210]  internal class: none
[   53.736214]  caps: single_disp video 
[   53.736219]  uvd    vclk: 0 dclk: 0
[   53.736223]          power level 0    sclk: 11000 mclk: 40000 vddc: 900
[   53.736226]          power level 1    sclk: 30000 mclk: 40000 vddc: 900
[   53.736229]          power level 2    sclk: 60000 mclk: 50000 vddc: 1100
[   53.736231]  status: r 
[   60.620870] SysRq : Keyboard mode set to system default

SysRQ + R,I brings back normal display

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