Am Dienstag, den 29.03.2016, 12:39 +0200 schrieb Krzysztof Ha?asa:

Lucas Stach [off-list ref] writes:

quoted

Is this working with v4.4 and PCI_MSI enabled? I'm sure I've tested MSI
IRQs before enabling them in the defconfig and they have been working
for me for a long time before that. Tested with i210 on Gateworks
Ventana.

MSI never worked for me on Ventana. I have been using 4.2 extensively,
and now I'm switching to 4.5 (which doesn't work either).

Could it be a DTS (bridge) problem(?)

On 4.5, trying to use it with TW6869 frame buffer and GW5410:

TW6869: PCI 0000:04:00.0, IRQ 336, MMIO 0x1100000
TW686x 0000:04:00.0: enabling device (0140 -> 0142)

I don't see whee the device even tries to use MSI IRQs. Even if the
infrastructure is enabled it opts to use legacy INTA.

There is no upstream driver for this chip, so I don't know where to look
to find out if the driver tries to enable MSI.

Is what you are saying that if you enable MSI support in the kernel, it
breaks legacy IRQs?

Regards,
Lucas

           CPU0       CPU1       CPU2       CPU3
 16:       1165       1032       1271       1591     GIC-0  29 Edge      twd
 17:        879        387       1404        606       GPC  55 Level     i.MX Timer Tick
 18:       6434          0          0          0       GPC  13 Level     mxs-dma
 19:          0          0          0          0       GPC  15 Level     bch
 21:          0          0          0          0       GPC   9 Level     130000.gpu
 22:          0          0          0          0       GPC  10 Level     134000.gpu
 24:          0          0          0          0       GPC 120 Level     mx6-pcie-msi
 26:          0          0          0          0       GPC  26 Level     2020000.serial
 30:          0          0          0          0       GPC  12 Level     2040000.vpu
240:          0          0          0          0  gpio-mxc   0 Edge      2198000.usdhc cd
280:          0          0          0          0       GPC  19 Level     rtc alarm
286:          0          0          0          0       GPC   2 Level     sdma
287:          0          0          0          0       GPC  43 Level     2184000.usb
288:         32          0          0          0       GPC  40 Level     2184200.usb
289:       2294          0          0          0     GIC-0 150 Level     2188000.ethernet
290:          0          0          0          0     GIC-0 151 Level     2188000.ethernet
291:          0          0          0          0       GPC  24 Level     mmc0
292:          0          0          0          0       GPC  36 Level     21a0000.i2c
293:          0          0          0          0       GPC  37 Level     21a4000.i2c
294:          0          0          0          0       GPC  38 Level     21a8000.i2c
296:       1422          0          0          0       GPC  27 Level     21e8000.serial
297:          0          0          0          0       GPC  30 Level     21f4000.serial
300:          0          0          0          0       GPC  39 Level     ahci-imx[2200000.sata]
301:          0          0          0          0       GPC  11 Level     2204000.gpu
304:          0          0          0          0   PCI-MSI   0 Edge      PCIe PME, aerdrv
336:          0          0          0          0       GPC 123 Level     TW6869
339:          0          0          0          0       IPU 457 Edge      (null)
340:          0          0          0          0       IPU 451 Edge      (null)
341:          0          0          0          0       IPU 457 Edge      (null)
342:          0          0          0          0       IPU 451 Edge      (null)
IPI0:          0          0          0          0  CPU wakeup interrupts
IPI1:        183        111         90         57  Timer broadcast interrupts
IPI2:        453       2091       6539       2088  Rescheduling interrupts
IPI3:         37         32         29         23  Function call interrupts
IPI4:          0          0          0          0  CPU stop interrupts
IPI5:          0          0          0          1  IRQ work interrupts
IPI6:          0          0          0          0  completion interrupts
Err:          0

00:00.0 PCI bridge: Synopsys, Inc. Device abcd (rev 01)
01:00.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
01:00.1 System peripheral: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:01.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:04.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:05.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:06.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:07.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:08.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
02:09.0 PCI bridge: PLX Technology, Inc. PEX 8609 8-lane, 8-Port PCI Express Gen 2 (5.0 GT/s) Switch with DMA (rev ba)
04:00.0 Multimedia controller: Techwell Inc. Device 6869 (rev 01)
08:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8057 PCI-E Gigabit Ethernet Controller

-[0000:00]---00.0-[01]--+-00.0-[02-09]--+-01.0-[03]--
                        |               +-04.0-[04]----00.0
                        |               +-05.0-[05]--
                        |               +-06.0-[06]--
                        |               +-07.0-[07]--
                        |               +-08.0-[08]----00.0
                        |               \-09.0-[09]--
                        \-00.1