BUG: *ERROR* No EDID read

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[    0.000000] Command line: BOOT_IMAGE=/vmlinuz-linuxtest
root=UUID=27247597-a354-42f3-8040-caff9592a297 drm.debug=0x4 rw quiet
[    0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-linuxtest
root=UUID=27247597-a354-42f3-8040-caff9592a297 drm.debug=0x4 rw quiet
[    5.674793] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.674833] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.674887] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.674930] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.674974] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675014] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675056] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675095] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675138] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675178] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675221] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675260] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675304] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675342] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675384] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675422] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675465] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675503] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675587] [drm:bios_parser_get_firmware_info [amdgpu]] At
bios_parser_get_firmware_info switch, got major 3 minor 1
[    5.675626] [drm:bios_parser_get_firmware_info [amdgpu]] *ERROR* At
bios_parser_get_firmware_info switch, got major 3 minor 1

I don't really know what is going on. If I go back to 4.17 and apply
my "fix". It doesn't work. I suppose my bisect didn't get me the right
commit. I probably never tested that the commit, from the bisect, was
actually bad. I was also a little lazy and did "bisect start
29dcea88779c856c7dc92040a0c01233263101d4
6da6c0db5316275015e8cc2959f12a17584aeb64 -- drivers/gpu/drm/amd".

I guess I'll try another bisect tomorrow on the entire tree, sorry for
the extra work.

// Daniel

On 5 July 2018 at 20:22, Harry Wentland <harry.wentland at amd.com> wrote:
> On 2018-07-05 01:43 PM, Daniel Andersson wrote:
>> Well, this workaround:
>>
>> diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
>> b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
>> index 10a5807a7e8b..d0f5910c906c 100644
>> --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
>> +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
>> @@ -1321,6 +1321,8 @@ static enum bp_result bios_parser_get_firmware_info(
>>   header = GET_IMAGE(struct atom_common_table_header,
>>   DATA_TABLES(firmwareinfo));
>>   get_atom_data_table_revision(header, &revision);
>> +    dm_output_to_console("At bios_parser_get_firmware_info switch,
>> got major %d minor %d", revision.major, revision.minor);
>> +    dm_error("At bios_parser_get_firmware_info switch, got major %d
>> minor %d", revision.major, revision.minor);
>>   switch (revision.major) {
>>   case 3:
>>   switch (revision.minor) {
>> @@ -1328,7 +1330,7 @@ static enum bp_result bios_parser_get_firmware_info(
>>   result = get_firmware_info_v3_1(bp, info);
>>   break;
>>   case 2:
>> - result = get_firmware_info_v3_2(bp, info);
>> + result = get_firmware_info_v3_1(bp, info);
>>   break;
>>   default:
>>   break;
>>
>> "works":
>> [engy][~/devel/3pp/linux] ((6e65fb862064...)|BISECTING)$ xrandr
>> Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
>> DisplayPort-0 connected 2560x1440+0+0 (normal left inverted right x
>> axis y axis) 598mm x 336mm
>>    2560x1440     59.95*+ 120.00    99.95    84.98    23.97
>>    1920x1200     59.95
>>    1920x1080     59.95
>>    1600x1200     59.95
>>    1680x1050     59.95
>>    1280x1024     59.95
>>    1440x900      59.95
>>    1280x800      59.95
>>    1280x720      59.95
>>    1024x768      59.95
>>    800x600       59.95
>>    640x480       59.95
>> DisplayPort-1 disconnected (normal left inverted right x axis y axis)
>> HDMI-A-0 disconnected (normal left inverted right x axis y axis)
>> HDMI-A-1 disconnected (normal left inverted right x axis y axis)
>>
>> Where does dm_error and dm_output_to_console end up?
>>
>
> dm_error -> DRM_ERROR will end up in dmesg as an error message
> dm_output_to_console -> DRM_DEBUG_KMS will end up in dmesg as a normal log message if drm.debug=0x4 is set on the kernel command line
>
> I'd be curious what the driver thinks the major and minor are.
>
> Harry
>
>> // Daniel
>>
>> On 5 July 2018 at 18:42, Deucher, Alexander <Alexander.Deucher at amd.com> wrote:
>>> So your vbios has table v3.1 so it should not be affected by that patch.
>>> Does reverting that patch actually fix the issue?
>>>
>>>
>>> Alex
>>>
>>> ________________________________
>>> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Daniel
>>> Andersson <engywook at gmail.com>
>>> Sent: Thursday, July 5, 2018 12:22:17 PM
>>> To: Alex Deucher
>>> Cc: amd-gfx at lists.freedesktop.org
>>> Subject: Re: BUG: *ERROR* No EDID read
>>>
>>> I have not flashed any GPU BIOS. It's not a reference Vega though,
>>> Sapphire something. Maybe they made changes?
>>>
>>> vbios is attached.
>>>
>>> // Daniel
>>>
>>> On 5 July 2018 at 15:38, Alex Deucher <alexdeucher at gmail.com> wrote:
>>>> On Mon, Jul 2, 2018 at 5:39 PM, Daniel Andersson <engywook at gmail.com>
>>>> wrote:
>>>>> Sure, bisecting gets me 6e65fb862064663ad3a08f964af1e8f3f2abf688 .
>>>>>
>>>>> In drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c,
>>>>> get_firmware_info_v3_1() works but get_firmware_info_v3_2() does not
>>>>> do the right thing for my Vega.
>>>>>
>>>>> Could I break my GPU if I were to set some bad/wrong frequency there?
>>>>
>>>> vega10 should not hit that new path at all.  Have you edited your
>>>> vbios?  Can you send us a copy?  To get a copy of the vbios:
>>>>
>>>> Without the driver loaded:
>>>> (as root)
>>>> (use lspci to get the bus id)
>>>> cd /sys/bus/pci/devices/<pci bus id>
>>>> echo 1 > rom
>>>> cat rom > /tmp/vbios.rom
>>>> echo 0 > rom
>>>>
>>>> If the driver is loaded:
>>>> (as root)
>>>> cat /sys/kernel/debug/dri/0/amdgpu_vbios > /tmp/vbios.rom
>>>>
>>>> Alex
>>>>
>>>>>
>>>>> lspci:
>>>>> 43:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
>>>>> [AMD/ATI] Vega 10 XT [Radeon RX Vega 64] (rev c1) (prog-if 00 [VGA
>>>>> controller])
>>>>>   Subsystem: Sapphire Technology Limited Vega 10 XT [Radeon RX Vega
>>>>> 64]
>>>>>   Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>>> Stepping- SERR- FastB2B- DisINTx+
>>>>>   Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>>   Latency: 0, Cache Line Size: 64 bytes
>>>>>   Interrupt: pin A routed to IRQ 85
>>>>>   Region 0: Memory at d0000000 (64-bit, prefetchable) [size=256M]
>>>>>   Region 2: Memory at e0000000 (64-bit, prefetchable) [size=2M]
>>>>>   Region 4: I/O ports at f000 [size=256]
>>>>>   Region 5: Memory at ed400000 (32-bit, non-prefetchable) [size=512K]
>>>>>   Expansion ROM at ed480000 [disabled] [size=128K]
>>>>>   Capabilities: [48] Vendor Specific Information: Len=08 <?>
>>>>>   Capabilities: [50] Power Management version 3
>>>>>     Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
>>>>> PME(D0-,D1+,D2+,D3hot+,D3cold+)
>>>>>     Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
>>>>>   Capabilities: [64] Express (v2) Legacy Endpoint, MSI 00
>>>>>     DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1
>>>>> unlimited
>>>>>       ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
>>>>>     DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
>>>>>       RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
>>>>>       MaxPayload 256 bytes, MaxReadReq 512 bytes
>>>>>     DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr-
>>>>> TransPend-
>>>>>     LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM L0s L1, Exit Latency
>>>>> L0s <64ns, L1 <1us
>>>>>       ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
>>>>>     LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- CommClk+
>>>>>       ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>>>>>     LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive-
>>>>> BWMgmt- ABWMgmt-
>>>>>     DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR+,
>>>>> OBFF Not Supported
>>>>>        AtomicOpsCap: 32bit- 64bit- 128bitCAS-
>>>>>     DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF
>>>>> Disabled
>>>>>        AtomicOpsCtl: ReqEn-
>>>>>     LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
>>>>>        Transmit Margin: Normal Operating Range,
>>>>> EnterModifiedCompliance- ComplianceSOS-
>>>>>        Compliance De-emphasis: -6dB
>>>>>     LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+,
>>>>> EqualizationPhase1+
>>>>>        EqualizationPhase2+, EqualizationPhase3+,
>>>>> LinkEqualizationRequest-
>>>>>   Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>>>>     Address: 00000000fee00000  Data: 0000
>>>>>   Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1
>>>>> Len=010 <?>
>>>>>   Capabilities: [150 v2] Advanced Error Reporting
>>>>>     UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF-
>>>>> MalfTLP- ECRC- UnsupReq- ACSViol-
>>>>>     UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF-
>>>>> MalfTLP- ECRC- UnsupReq- ACSViol-
>>>>>     UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+
>>>>> MalfTLP+ ECRC- UnsupReq- ACSViol-
>>>>>     CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
>>>>>     CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
>>>>>     AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn-
>>>>> ECRCChkCap+ ECRCChkEn-
>>>>>       MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
>>>>>     HeaderLog: 00000000 00000000 00000000 00000000
>>>>>   Capabilities: [200 v1] #15
>>>>>   Capabilities: [270 v1] #19
>>>>>   Capabilities: [2a0 v1] Access Control Services
>>>>>     ACSCap: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd-
>>>>> EgressCtrl- DirectTrans-
>>>>>     ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd-
>>>>> EgressCtrl- DirectTrans-
>>>>>   Capabilities: [2b0 v1] Address Translation Service (ATS)
>>>>>     ATSCap: Invalidate Queue Depth: 00
>>>>>     ATSCtl: Enable+, Smallest Translation Unit: 00
>>>>>   Capabilities: [2c0 v1] Page Request Interface (PRI)
>>>>>     PRICtl: Enable- Reset-
>>>>>     PRISta: RF- UPRGI- Stopped+
>>>>>     Page Request Capacity: 00000020, Page Request Allocation: 00000000
>>>>>   Capabilities: [2d0 v1] Process Address Space ID (PASID)
>>>>>     PASIDCap: Exec+ Priv+, Max PASID Width: 10
>>>>>     PASIDCtl: Enable- Exec- Priv-
>>>>>   Capabilities: [320 v1] Latency Tolerance Reporting
>>>>>     Max snoop latency: 0ns
>>>>>     Max no snoop latency: 0ns
>>>>>   Kernel driver in use: amdgpu
>>>>>   Kernel modules: amdgpu
>>>>>
>>>>> // Daniel
>>>>>
>>>>> On 2 July 2018 at 21:29, Alex Deucher <alexdeucher at gmail.com> wrote:
>>>>>> On Mon, Jul 2, 2018 at 3:21 PM, Daniel Andersson <engywook at gmail.com>
>>>>>> wrote:
>>>>>>> I get:
>>>>>>> [drm:dc_link_detect [amdgpu]] *ERROR* No EDID read.
>>>>>>> on boot. This started happening on 4.17 and is still an issue on
>>>>>>> 4.18-rc2.
>>>>>>>
>>>>>>> I have a Vega64 connected on Display Port to a monitor(1440p). The
>>>>>>> monitor
>>>>>>> doesn't have any additional ports so I can't test HDMI.
>>>>>>>
>>>>>>> xrandr:
>>>>>>> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 16384 x 16384
>>>>>>> DisplayPort-0 connected 1024x768+0+0 (normal left inverted right x axis
>>>>>>> y
>>>>>>> axis) 0mm x 0mm
>>>>>>>    1024x768      60.00*
>>>>>>>    800x600       60.32    56.25
>>>>>>>    848x480       60.00
>>>>>>>    640x480       59.94
>>>>>>> DisplayPort-1 disconnected (normal left inverted right x axis y axis)
>>>>>>> HDMI-A-0 disconnected (normal left inverted right x axis y axis)
>>>>>>> HDMI-A-1 disconnected (normal left inverted right x axis y axis)
>>>>>>>
>>>>>>> The 1440p resolution worked on 4.16.
>>>>>>
>>>>>> Can you use git to bisect?
>>>>>>
>>>>>> Alex
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>


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