R600 KMS DRM: no dcc bus report
Andrea Merello
andrea.merello at gmail.com
Sun Jan 16 08:24:47 PST 2011
Hello!
While I was trying (without success) to make KMS work on my PC I saw
in DMESG a message that asked me to make a report to your mailing
list:
([drm] DDC: no ddc bus - possible BIOS bug - please report to
xorg-driver-ati at lists.x.org)
So I'm doing this report now, and wolud like to exploit the occasion
to tell you about another (trivial) thing about the driver firmware
loading.
Following I report few details about how I got that message:
I have a mainline 2.6.37 and a RV730 PRO [Radeon HD 4650] PCIexpress card.
What happen here is that without KMS all works (console OK, X OK, DRI
OK) but with KSM the screen become black during kernel loading.
By default my system does NOT run X after boot.
I think my monitor is not recognized. it is connected via DVI. The
card has also a HDMI and a VGA connectors.
Please note that in the log you will also see some messages you will
not recognize: I have added some printk in the r600.c kernel driver to
trace initialization flow. I did no any other modification in the
code.
I needed to add those to investigate another issue I had (now
resolved) with this driver related to firmware loading:
The problem was that I had no any diagnostic message when a microcode
file was missing (r700_rlc.bin)
Can I suggest you to add some printk when request_firmware fails? I
think this can be very helpful in order to help to individuate this
kind of problem and to individuate the specific file that is missing.
The "goto out" branch for failing firmware_request printed nothing..
The system simply hung (the screen was still showing the latest good
image with readable kernel message "Loading RV730 microcode") without
giving any other hint.
If you need some other info, or if you need I make some test please
ask me. I will be happy to do.
Please CC me in case of some discussion about this.
Thanks a lot
Andrea
Jan 17 00:49:38 supernova kernel: [ 0.302490] [drm] Initialized drm
1.1.0 20060810
Jan 17 00:49:38 supernova kernel: [ 0.302549] [drm] radeon
defaulting to kernel modesetting.
Jan 17 00:49:38 supernova kernel: [ 0.302581] [drm] radeon kernel
modesetting enabled.
Jan 17 00:49:38 supernova kernel: [ 0.302645] radeon 0000:01:00.0:
PCI INT A -> GSI 16 (level, low) -> IRQ 16
Jan 17 00:49:38 supernova kernel: [ 0.305142] [drm] initializing
kernel modesetting (RV730 0x1002:0x9498).
Jan 17 00:49:38 supernova kernel: [ 0.305239] [drm] register mmio
base: 0xFE8E0000
Jan 17 00:49:38 supernova kernel: [ 0.305271] [drm] register mmio size: 65536
Jan 17 00:49:38 supernova kernel: [ 0.305422] ATOM BIOS: 4650
Jan 17 00:49:38 supernova kernel: [ 0.305476] radeon 0000:01:00.0:
VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
Jan 17 00:49:38 supernova kernel: [ 0.305515] radeon 0000:01:00.0:
GTT: 512M 0x0000000040000000 - 0x000000005FFFFFFF
Jan 17 00:49:38 supernova kernel: [ 0.305556] mtrr: type mismatch
for d0000000,10000000 old: write-back new: write-combining
Jan 17 00:49:38 supernova kernel: [ 0.305593] [drm] Detected VRAM
RAM=1024M, BAR=256M
Jan 17 00:49:38 supernova kernel: [ 0.305624] [drm] RAM width 128bits DDR
Jan 17 00:49:38 supernova kernel: [ 0.305677] [TTM] Zone kernel:
Available graphics memory: 2026446 kiB.
Jan 17 00:49:38 supernova kernel: [ 0.305710] [TTM] Initializing
pool allocator.
Jan 17 00:49:38 supernova kernel: [ 0.305757] [drm] radeon: 1024M
of VRAM memory ready
Jan 17 00:49:38 supernova kernel: [ 0.305789] [drm] radeon: 512M of
GTT memory ready.
Jan 17 00:49:38 supernova kernel: [ 0.305866] radeon 0000:01:00.0:
radeon: using MSI.
Jan 17 00:49:38 supernova kernel: [ 0.305921] [drm] radeon: irq initialized.
Jan 17 00:49:38 supernova kernel: [ 0.305953] [drm] GART: num cpu
pages 131072, num gpu pages 131072
Jan 17 00:49:38 supernova kernel: [ 0.307035] [drm] Loading RV730 Microcode
Jan 17 00:49:38 supernova kernel: [ 0.307068] [drm] requesting
radeon/RV730_pfp.bin
Jan 17 00:49:38 supernova kernel: [ 0.307102] [drm] requesting
radeon/RV730_me.bin
Jan 17 00:49:38 supernova kernel: [ 0.307133] [drm] requesting
radeon/R700_rlc.bin
Jan 17 00:49:38 supernova kernel: [ 0.307164] [drm] Aff fw has been get
Jan 17 00:49:38 supernova kernel: [ 0.308936] radeon 0000:01:00.0: WB enabled
Jan 17 00:49:38 supernova kernel: [ 0.339215] [drm] r600 resume
Jan 17 00:49:38 supernova kernel: [ 0.355248] [drm] r600 cp start
Jan 17 00:49:38 supernova kernel: [ 0.355279] [drm] r600 cp start exiting
Jan 17 00:49:38 supernova kernel: [ 0.355309] [drm] r600 ring test
Jan 17 00:49:38 supernova kernel: [ 0.355342] [drm] ring test
succeeded in 1 usecs
Jan 17 00:49:38 supernova kernel: [ 0.355460] [drm] radeon: ib pool ready.
Jan 17 00:49:38 supernova kernel: [ 0.355564] [drm] ib test
succeeded in 0 usecs
Jan 17 00:49:38 supernova kernel: [ 0.355595] [drm] Enabling audio support
Jan 17 00:49:38 supernova kernel: [ 0.356072] [drm] Radeon Display Connectors
Jan 17 00:49:38 supernova kernel: [ 0.356103] [drm] Connector 0:
Jan 17 00:49:38 supernova kernel: [ 0.356133] [drm] DVI-I
Jan 17 00:49:38 supernova kernel: [ 0.356162] [drm] DDC: no ddc
bus - possible BIOS bug - please report to xorg-driver-ati at lists.x.org
Jan 17 00:49:38 supernova kernel: [ 0.356199] [drm] Encoders:
Jan 17 00:49:38 supernova kernel: [ 0.356229] [drm] CRT2:
INTERNAL_KLDSCP_DAC2
Jan 17 00:49:38 supernova kernel: [ 0.356259] [drm] TV1:
INTERNAL_KLDSCP_DAC2
Jan 17 00:49:38 supernova kernel: [ 0.356290] [drm] DFP2:
INTERNAL_UNIPHY1
Jan 17 00:49:38 supernova kernel: [ 0.356320] [drm] Connector 1:
Jan 17 00:49:38 supernova kernel: [ 0.356349] [drm] HDMI-A
Jan 17 00:49:38 supernova kernel: [ 0.356378] [drm] HPD3
Jan 17 00:49:38 supernova kernel: [ 0.356407] [drm] DDC: 0x7e40
0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
Jan 17 00:49:38 supernova kernel: [ 0.356443] [drm] Encoders:
Jan 17 00:49:38 supernova kernel: [ 0.356473] [drm] DFP1: INTERNAL_UNIPHY
Jan 17 00:49:38 supernova kernel: [ 0.356503] [drm] Connector 2:
Jan 17 00:49:38 supernova kernel: [ 0.356532] [drm] DVI-I
Jan 17 00:49:38 supernova kernel: [ 0.356561] [drm] HPD1
Jan 17 00:49:38 supernova kernel: [ 0.356590] [drm] DDC: 0x7e20
0x7e20 0x7e24 0x7e24 0x7e28 0x7e28 0x7e2c 0x7e2c
Jan 17 00:49:38 supernova kernel: [ 0.356626] [drm] Encoders:
Jan 17 00:49:38 supernova kernel: [ 0.356655] [drm] DFP1: INTERNAL_UNIPHY
Jan 17 00:49:38 supernova kernel: [ 0.356691] [drm] CRT1:
INTERNAL_KLDSCP_DAC1
Jan 17 00:49:38 supernova kernel: [ 0.360618] [drm] Internal
thermal controller without fan control
Jan 17 00:49:38 supernova kernel: [ 0.361294] [drm] radeon: power
management initialized
Jan 17 00:49:38 supernova kernel: [ 0.390317] No connectors
reported connected with modes
Jan 17 00:49:38 supernova kernel: [ 0.390350] [drm] Cannot find any
crtc or sizes - going 1024x768
Jan 17 00:49:38 supernova kernel: [ 0.391894] [drm] fb mappable at 0xD0142000
Jan 17 00:49:38 supernova kernel: [ 0.391925] [drm] vram apper at 0xD0000000
Jan 17 00:49:38 supernova kernel: [ 0.391955] [drm] size 3145728
Jan 17 00:49:38 supernova kernel: [ 0.391984] [drm] fb depth is 24
Jan 17 00:49:38 supernova kernel: [ 0.392014] [drm] pitch is 4096
Jan 17 00:49:38 supernova kernel: [ 0.392162] fbcon: radeondrmfb
(fb0) is primary device
Jan 17 00:49:38 supernova kernel: [ 0.395804] Console: switching to
colour frame buffer device 128x48
Jan 17 00:49:38 supernova kernel: [ 0.397260] fb0: radeondrmfb
frame buffer device
Jan 17 00:49:38 supernova kernel: [ 0.397278] drm: registered panic notifier
Jan 17 00:49:38 supernova kernel: [ 0.397298] [drm] Initialized
radeon 2.7.0 20080528 for 0000:01:00.0 on minor 0
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