BUG: *ERROR* No EDID read
Daniel Andersson
engywook at gmail.com
Thu Jul 5 16:22:17 UTC 2018
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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