On 26/08/26 11:06, Thomas Zimmermann wrote:
> Hi
>
> Am 02.08.26 um 20:06 schrieb Christian Zigotzky:
>> Hello René,
>>
>> Many thanks for your patch. [1]
>>
>> I have bought the PCI graphics card Matrox G200 G2+/QUADP-PL/7 32MB
with 4x DVI. It is an AGP card connected via PCI.
>>
>> We use the new DRM driver MGAG200 since the kernel 7.2.0-rc4 and the
old DRM legacy driver for Matrox g200/g400 graphics cards since the
stable long-term kernel 5.10.260.
>>
>> I tested it with the RC5 of kernel 7.2 in my PowerPC machine (e5500)
today. Unfortunately, the DRM driver mgag200 can't read the PCI ROM.
Maybe only an x86 ROM?
>>
>> xrandr detects the ports but reports that they are not connected,
even though the cables are plugged in.
>>
>> I also tested it with the stable long-term kernel 5.10.261 with the
old legacy DRM drivers for Matrox graphics cards.
>> I installed the Xorg MGA server xf86-video-mga-2.0.0_3 for the old
legacy DRM driver but unfortunately I get only a black screen.
>>
>> Is it possible to use this card with PPC Linux?
>
> Attached is the patch I promised. Please apply it and test it on
your machine. Does it make the card work?
>
> Best regards
> Thomas
Hello Thomas,
Thank you for your patch. Unfortunately the card doesn't work with the
patched kernel.
dmesg | grep -i mga
[ 2.307195] [drm] Initialized mgag200 1.0.0 for 0001:05:00.0 on minor 1
[ 2.308649] mgag200 0001:05:00.0: [drm] Cannot find any crtc or sizes
[ 2.309551] mgag200 0001:05:04.0: Invalid PCI ROM header signature:
expecting 0xaa55, got 0xffff
[ 2.310305] [drm] Initialized mgag200 1.0.0 for 0001:05:04.0 on minor 2
[ 2.312660] mgag200 0001:05:04.0: [drm] Cannot find any crtc or sizes
[ 2.313177] mgag200 0001:05:00.0: [drm] Cannot find any crtc or sizes
[ 2.313640] mgag200 0001:05:08.0: Invalid PCI ROM header signature:
expecting 0xaa55, got 0xffff
[ 2.314357] [drm] Initialized mgag200 1.0.0 for 0001:05:08.0 on minor 3
[ 2.317630] mgag200 0001:05:08.0: [drm] Cannot find any crtc or sizes
[ 2.318185] mgag200 0001:05:0c.0: Invalid PCI ROM header signature:
expecting 0xaa55, got 0xffff
[ 2.318840] mgag200 0001:05:04.0: [drm] Cannot find any crtc or sizes
[ 2.319345] [drm] Initialized mgag200 1.0.0 for 0001:05:0c.0 on minor 4
[ 2.321014] mgag200 0001:05:0c.0: [drm] Cannot find any crtc or sizes
[ 2.322400] mgag200 0001:05:08.0: [drm] Cannot find any crtc or sizes
[ 2.327215] mgag200 0001:05:0c.0: [drm] Cannot find any crtc or sizes
lspci -vvv
0001:05:00.0 VGA compatible controller: Matrox Electronics Systems Ltd.
MGA G200 AGP (rev 03) (prog-if 00 [VGA controller])
Subsystem: Matrox Electronics Systems Ltd. G200 Multi-Monitor
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 128 (4000ns min, 8000ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at c20000000 (32-bit, prefetchable) [size=16M]
Region 1: Memory at c21000000 (32-bit, non-prefetchable) [size=16K]
Region 2: Memory at c21800000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at c21010000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [f0] AGP version 1.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW- AGP3- Rate=x1,x2
Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW-
Rate=<none>
Kernel driver in use: mgag200
0001:05:04.0 Display controller: Matrox Electronics Systems Ltd. MGA
G200 AGP (rev 03)
Subsystem: Matrox Electronics Systems Ltd. G200 Multi-Monitor
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 128 (4000ns min, 8000ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at c22000000 (32-bit, prefetchable) [size=16M]
Region 1: Memory at c23000000 (32-bit, non-prefetchable) [size=16K]
Region 2: Memory at c23800000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at c21020000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [f0] AGP version 1.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW- AGP3- Rate=x1,x2
Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW-
Rate=<none>
Kernel driver in use: mgag200
0001:05:08.0 Display controller: Matrox Electronics Systems Ltd. MGA
G200 AGP (rev 03)
Subsystem: Matrox Electronics Systems Ltd. G200 Multi-Monitor
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 128 (4000ns min, 8000ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at c24000000 (32-bit, prefetchable) [size=16M]
Region 1: Memory at c25000000 (32-bit, non-prefetchable) [size=16K]
Region 2: Memory at c25800000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at c21030000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [f0] AGP version 1.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW- AGP3- Rate=x1,x2
Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW-
Rate=<none>
Kernel driver in use: mgag200
0001:05:0c.0 Display controller: Matrox Electronics Systems Ltd. MGA
G200 AGP (rev 03)
Subsystem: Matrox Electronics Systems Ltd. G200 Multi-Monitor
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 128 (4000ns min, 8000ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at c26000000 (32-bit, prefetchable) [size=16M]
Region 1: Memory at c27000000 (32-bit, non-prefetchable) [size=16K]
Region 2: Memory at c27800000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at c21040000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [f0] AGP version 1.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW- AGP3- Rate=x1,x2
Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW-
Rate=<none>
Kernel driver in use: mgag200
xrandr
VGA-4-4 disconnected (normal left inverted right x axis y axis)
VGA-3-3 disconnected (normal left inverted right x axis y axis)
VGA-2-2 disconnected (normal left inverted right x axis y axis)
VGA-1-1 disconnected (normal left inverted right x axis y axis)
lspci -nnk | grep VGA
0001:05:00.0 VGA compatible controller [0300]: Matrox Electronics
Systems Ltd. MGA G200 AGP [102b:0521] (rev 03)
Thanks,
Christian
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