BUG: *ERROR* No EDID read
Harry Wentland
harry.wentland at amd.com
Thu Jul 5 18:22:50 UTC 2018
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
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