Question about radeon runpm dmesg logs

[Pali Rohár]

Hello,

I have laptop with hybrid graphics solution (intel+radeon).
Radeon runpm option working (when using DRI_PRIME), however every
time when radeon card is powering on kernel write lot of lines to
dmesg:

[ 1075.055132] ACPI: \_SB_.PCI0.PEG0: ACPI_NOTIFY_BUS_CHECK event
[ 1075.055164] ACPI: \_SB_.PCI0.PEG0: Bus check in hotplug_event()
[ 1075.064446] switching from power state:
[ 1075.064449]  ui class: none
[ 1075.064450]  internal class: boot 
[ 1075.064451]  caps: 
[ 1075.064452]  uvd    vclk: 0 dclk: 0
[ 1075.064453]          power level 0    sclk: 30000 mclk: 14900 vddc: 900 vddci: 0 pcie gen: 3
[ 1075.064454]  status: c b 
[ 1075.064455] switching to power state:
[ 1075.064455]  ui class: performance
[ 1075.064456]  internal class: none
[ 1075.064457]  caps: 
[ 1075.064457]  uvd    vclk: 0 dclk: 0
[ 1075.064458]          power level 0    sclk: 30000 mclk: 15000 vddc: 800 vddci: 0 pcie gen: 3
[ 1075.064459]          power level 1    sclk: 40000 mclk: 100000 vddc: 875 vddci: 0 pcie gen: 3
[ 1075.064460]          power level 2    sclk: 75000 mclk: 100000 vddc: 1025 vddci: 0 pcie gen: 3
[ 1075.064461]          power level 3    sclk: 90000 mclk: 100000 vddc: 1025 vddci: 0 pcie gen: 3
[ 1075.064461]          power level 4    sclk: 97500 mclk: 100000 vddc: 1075 vddci: 0 pcie gen: 3
[ 1075.064462]  status: r 
[ 1075.065584] [drm] probing gen 2 caps for device 8086:c01 = 261ad03/e
[ 1075.065586] [drm] PCIE gen 3 link speeds already enabled
[ 1075.067609] [drm] PCIE GART of 1024M enabled (table at 0x0000000000040000).
[ 1075.067722] radeon 0000:01:00.0: WB enabled
[ 1075.067724] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 
0xffff880036d8cc00
[ 1075.067725] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr 
0xffff880036d8cc04
[ 1075.067726] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr 
0xffff880036d8cc08
[ 1075.067727] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 
0xffff880036d8cc0c
[ 1075.067728] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr 
0xffff880036d8cc10
[ 1075.209399] [drm] ring test on 0 succeeded in 2 usecs
[ 1075.209403] [drm] ring test on 1 succeeded in 1 usecs
[ 1075.209406] [drm] ring test on 2 succeeded in 1 usecs
[ 1075.209464] [drm] ring test on 3 succeeded in 2 usecs
[ 1075.209470] [drm] ring test on 4 succeeded in 1 usecs
[ 1075.209528] [drm] ib test on ring 0 succeeded in 0 usecs
[ 1075.209577] [drm] ib test on ring 1 succeeded in 0 usecs
[ 1075.209621] [drm] ib test on ring 2 succeeded in 0 usecs
[ 1075.209646] [drm] ib test on ring 3 succeeded in 0 usecs
[ 1075.209663] [drm] ib test on ring 4 succeeded in 0 usecs


And when radeon card is automatically powered off by runpm in
dmesg I see these lines:

[ 1081.923248] ACPI: \_SB_.PCI0.PEG0: ACPI_NOTIFY_BUS_CHECK event
[ 1081.923267] ACPI: \_SB_.PCI0.PEG0: Bus check in hotplug_event()

Is it OK? Are there any errors? For me lines marked with drm and
radeon strings look like test/verbose/debug info. But I really do
not know what that ACPI lines are and what it means. It is something important?

I just want to be sure if there are some errors or not - as
seeing couple of lines every time when card is turned on does not
look like pretty.

-- 
Pali Rohár
pali.rohar at gmail.com
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