BUG: *ERROR* No EDID read

Deucher, Alexander Alexander.Deucher at amd.com
Thu Jul 5 16:42:46 UTC 2018


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
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