GPIO pinout: https://docs.banana-pi.org/en/BPI-R4/BananaPi_BPI-R4
SPI - 1.69inch LCD Module 240x280 pixels, ST7789V2
4=5V, 6=GND, 19=SPI1_MOSI, 21=SPI1_MISO, 23=SPI1_CLK, 24=SPI1_CSB
What's the purpose of this?
Guessing you wanna help here?
With what?
I raised driver bugs...
Yesterday, I performed similar configuration on my orangepi5 plus and all works fine.
Here basic commands produce only kernel panic...
Hi DroZDi have you make any progress?
No 
SPI under kernel 6.6 fails. Bugs registred but Im basicly ignored.
Wanted to make tests under 6.1 kernel but now Im facing an issue with compailing an openwrt image -> mt76 driver so stuck at all lines
can you control the gpios for reset, commandmode and chipselect?
i got a /dev/spidev1.0 but its crash if i try to access
ot@OpenWrt:/# spidev_test -D /dev/spidev1[ 47.371293] SError Interrupt on CPU3, code 0x00000000bf000002 -- SError
[ 47.371307] CPU: 3 PID: 4744 Comm: spidev_test Tainted: G O 6.6.23 #0
[ 47.371313] Hardware name: Bananapi BPI-R4 (DT)
[ 47.371315] pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 47.371320] pc : mtk_spi_set_cs+0x54/0x80
[ 47.371333] lr : spi_set_cs+0x88/0x1dc
[ 47.371337] sp : ffffffc084f33c00
[ 47.371339] x29: ffffffc084f33c00 x28: ffffff80c161ae00 x27: 0000000000000000
[ 47.371347] x26: 0000000000000000 x25: ffffff80c58c3040 x24: ffffff80c58c3008
[ 47.371352] x23: ffffff80c4ebe400 x22: 0000000000000000 x21: 0000000000000000
[ 47.371357] x20: 0000000000000000 x19: ffffff80c4ebe400 x18: 0000000000000000
[ 47.371362] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[ 47.371366] x14: 02d405aed0f4a420 x13: 016a26391234ec20 x12: 00000000016a2639
[ 47.371371] x11: 00000000fa83b2da x10: 000000000000b67e x9 : 0000000000000009
[ 47.371375] x8 : ffffff80ff7a5400 x7 : ffffff80c01d73d0 x6 : 0000000000000002
[ 47.371380] x5 : 00000000eda7f346 x4 : ffffff80c080a800 x3 : 0000000000000000
[ 47.371384] x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffff80c080ad40
[ 47.371389] Kernel panic - not syncing: Asynchronous SError Interrupt
[ 47.371392] SMP: stopping secondary CPUs
[ 47.371397] Kernel Offset: disabled
[ 47.371399] CPU features: 0x0,00000000,20000000,1000400b
[ 47.371402] Memory Limit: none
[ 47.377752] pstore: backend (ramoops) writing error (-28)
so the chipselect crash the kernel
if i do
root@OpenWrt:/# spidev_test --no-cs -D /dev/spidev1.0
i got
[ 107.552705] spidev spi1.0: setup: unsupported mode bits 40
.0
can't set spi mode: Invalid argument
Aborted
I compiled new spidev_test but the same
Errors similar:
https://lists.openwall.net/netdev/2024/04/07/61
https://lists.openwall.net/linux-kernel/2024/04/07/417
what happend if u try with "--no-cs" ?
the same as for you
I took spi from kernel 6.9, compiled in 6.6.30 but the issue persists:
root@BPI-R4:/nvme/work/oled# spidev_test -D /dev/spidev1.0 -v
[ 473.465406] SError Interrupt on CPU2, code 0x00000000bf000002 -- SError
[ 473.465421] CPU: 2 PID: 7106 Comm: spidev_test Tainted: G O 6.6.30 #0
[ 473.465427] Hardware name: Bananapi BPI-R4 (DT)
[ 473.465429] pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 473.465434] pc : mtk_spi_set_cs+0x54/0x80
[ 473.465444] lr : spi_set_cs+0xe4/0x2f4
[ 473.465450] sp : ffffffc0896d3ca0
[ 473.465452] x29: ffffffc0896d3ca0 x28: ffffff80c1a6f300 x27: 0000000000000000
[ 473.465459] x26: 0000000000000000 x25: ffffff80c10e5b08 x24: ffffff80c62e4f08
[ 473.465464] x23: ffffff80c10e5b88 x22: 0000000000000000 x21: 0000000000000000
[ 473.465469] x20: ffffff80c10e5b08 x19: ffffff80c10e5800 x18: 0000000000000000
[ 473.465473] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[ 473.465478] x14: 029320b88d8f25ea x13: 013f77e20bcbd540 x12: 0000000000000002
[ 473.465482] x11: 0000000000000000 x10: 0000000000000400 x9 : 000000035885cc3a
[ 473.465487] x8 : 0000000000000800 x7 : ffffff80c103e850 x6 : 0000000000000000
[ 473.465491] x5 : ffffff80c0daf000 x4 : ffffff80c0daf000 x3 : 0000000000000000
[ 473.465495] x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffff80c0daf540
[ 473.465501] Kernel panic - not syncing: Asynchronous SError Interrupt
[ 473.465503] SMP: stopping secondary CPUs
[ 473.465512] Kernel Offset: disabled
[ 473.465513] CPU features: 0x0,00000000,20000000,1000400b
[ 473.465517] Memory Limit: none
[ 473.472731] pstore: backend (ramoops) writing error (-28)
PANIC at PC : 0x00000000430048a8
I'm curious if you were able to make any more progress on this. I'm interested in using luma lcd on the SPI1 bus!
As far as I know (I check from time to time new builds), SPI is still broken for Banana BPI-R4
Daniel Golle mentioned elsewhere that a recent fix for SPI was merged:
I will hopefully be able to give this a shot soon.
Interesting 
i will check this out
The issue has been fixed, I was able to confirm this today.
check if nothing connected:
root@BPI-R4:~# spidev_test -D /dev/spidev1.0 -v
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 kHz)
TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D |......@.........................|
RX | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................................|
short PIN19 and pin21:
root@BPI-R4:~# spidev_test -D /dev/spidev1.0 -v
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 kHz)
TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D |......@.........................|
RX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D |......@.........................|
root@BPI-R4:~#
root@BPI-R4:~# spi-config -d /dev/spidev1.0 -q
/dev/spidev1.0: mode=0, lsb=0, bits=8, speed=32000000, spiready=0