Re: [PATCH 0/4] Fix the i2c/clk bug of stm32 mcu platform

From: Patrice CHOTARD
Date: Mon May 31 2021 - 10:27:22 EST



On 5/31/21 3:38 PM, Dillon Min wrote:
> Hi Patrice
>
> Thanks for your time to test my patch.
>
> On Mon, May 31, 2021 at 9:20 PM Patrice CHOTARD
> <patrice.chotard@xxxxxxxxxxx> wrote:
>>
>> Hi Dillon
>>
>>
>>
>> On 5/14/21 1:02 PM, dillon.minfei@xxxxxxxxx wrote:
>>> From: Dillon Min <dillon.minfei@xxxxxxxxx>
>>>
>>> This seriese fix three i2c/clk bug for stm32 f4/f7
>>> - kernel runing in sdram, i2c driver get data timeout
>>> - ltdc clk turn off after kernel console active
>>> - kernel hang in set ltdc clock rate
>>>
>>> clk bug found on stm32f429/f469-disco board
>>>
>>> Hi Patrice:
>>> below is the guide to verify the patch:
>>>
>>> setup test env with following files(link at below 'files link'):
>>> [1] u-boot-dtb.bin
>>> [2] rootfs zip file (used in kernel initramfs)
>>> [3] u-boot's mkimage to create itb file
>>> [4] kernel config file
>>> [5] my itb with-or-without i2c patch
>>>
>>> This patch based on kernel commit:
>>> 88b06399c9c766c283e070b022b5ceafa4f63f19
>>>
>>> Note:
>>> panel-ilitek-ili9341.c is the driver which was submitted last year, but not
>>> get accepted. it's used to setup touch screen calibration, then test i2c.
>>>
>>> create itb file(please correct path of 'data'):
>>> ./mkimage -f stm32.its stm32.itb
>>>
>>> HW setup:
>>> console:
>>> PA9, PA10
>>> usart0
>>> serial@40011000
>>> 115200 8n1
>>>
>>> -- flash u-boot.bin to stm32f429-disco on PC
>>> $ sudo openocd -f board/stm32f429discovery.cfg -c \
>>> '{PATH-TO-YOUR-UBOOT}/u-boot-dtb.bin 0x08000000 exit reset'
>>>
>>> -- setup kernel load bootargs at u-boot
>>> U-Boot > setenv bootargs 'console=tty0 console=ttySTM0,115200
>>> root=/dev/ram rdinit=/linuxrc loglevel=8 fbcon=rotate:2'
>>> U-Boot > loady;bootm
>>> (download stm32.dtb or your kernel with itb format, or download zImage, dtb)
>>>
>>
>>
>> Thanks for these informations
>> I was able to load and boot DTB and uImage directly in SDRAM as you suggested,
>> i saw Linux logo and kernel log on the STM32F429-disco display,
>> but i can't reach the login.
>>
>> The last kernel log i got is :
>>
>> Starting kernel ...
>>
>> [ 0.000000] Booting Linux on physical CPU 0x0
>> [ 0.000000] Linux version 5.13.0-rc1-00082-g9dbbd5cb6240-dirty (nxp11987@lmecxl0573.lme1
>> [ 0.000000] CPU: ARMv7-M [410fc241] revision 1 (ARMv7M), cr=00000000
>> [ 0.000000] CPU: unknown data cache, unknown instruction cache
>> [ 0.000000] OF: fdt: Machine model: STMicroelectronics STM32F429i-DISCO board
>> [ 0.000000] Zone ranges:
>> [ 0.000000] Normal [mem 0x0000000090000000-0x00000000907fffff]
>> [ 0.000000] Movable zone start for each node
>> [ 0.000000] Early memory node ranges
>>
>> [...]
>>
>> [ 2.637564] printk: console [ttySTM0] enabled
>> [ 2.747984] panel-ilitek-ili9341 spi0.1: get optional vcc failed
>> [ 2.758986] spi_stm32 40015000.spi: driver initialized
>> [ 2.795733] i2c /dev entries driver
>> [ 2.849955] stmpe-i2c 0-0041: stmpe811 detected, chip id: 0x811
>> [ 2.922030] stmpe-ts stmpe-ts: DMA mask not set
>> [ 2.965729] input: stmpe-ts as /devices/platform/soc/40005c00.i2c/i2c-0/0-0041/stmpe-ts0
>> [ 2.991570] stm32f4-i2c 40005c00.i2c: STM32F4 I2C driver registered
>> [ 3.058262] [drm] Initialized stm 1.0.0 20170330 for 40016800.display-controller on min0
>> [ 3.665951] panel-ilitek-ili9341 spi0.1: initialized display rgb interface
>> [ 3.765208] Console: switching to colour frame buffer device 30x40
>> [ 4.014269] stm32-display 40016800.display-controller: [drm] fb0: stmdrmfb frame buffere
>> [ 4.212737] Freeing unused kernel memory: 324K
>> [ 4.287300] This architecture does not have kernel memory protection.
>> [ 4.401202] Run /linuxrc as init process
>> [ 4.478622] with arguments:
>> [ 4.555069] /linuxrc
>> [ 4.595406] with environment:
>> [ 4.672213] HOME=/
>> [ 4.712511] TERM=linux
>> [ 206.785289] random: crng init done
>
> I guess you didn't add the rootfs to uImage I sent you.

I do use your rootfs

> Could you post all the logs from u-boot startup to kernel log end.


U-Boot 2021.07-rc2 (May 28 2021 - 17:05:35 +0200)

DRAM: 8 MiB
Flash: 2 MiB
Loading Environment from Flash... OK
In: serial@40011000
Out: serial@40011000
Err: serial@40011000
Hit any key to stop autoboot: 0
U-Boot > setenv bootargs 'console=tty0 console=ttySTM0,115200 root=/dev/ram rdinit=/lin'
U-Boot >
U-Boot >
U-Boot > setenv loadaddr 0x90400000
U-Boot > loady
## Ready for binary (ymodem) download to 0x90400000 at 115200 bps...
CxyzModem - CRC mode, 156(SOH)/0(STX)/0(CAN) packets, 7 retries
## Total Size = 0x00004cad = 19629 Bytes
U-Boot > setenv loadaddr 0x90406000
U-Boot > loady
## Ready for binary (ymodem) download to 0x90406000 at 115200 bps...
C- CRC mode, 12453(SOH)/0(STX)/0(CAN) packets, 4 retries
## Total Size = 0x00185140 = 1593664 Bytes
U-Boot > bootm 0x90406000 - 0x90400000
## Booting kernel from Legacy Image at 90406000 ...
Image Name: Linux-5.13.0-rc1-00082-g9dbbd5cb
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1593600 Bytes = 1.5 MiB
Load Address: 90008000
Entry Point: 90008000
Verifying Checksum ... OK
## Flattened Device Tree blob at 90400000
Booting using the fdt blob at 0x90400000
Loading Kernel Image
Loading Device Tree to 905b9000, end 905c0cac ... OK

Starting kernel ...

[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.13.0-rc1-00082-g9dbbd5cb6240-dirty (nxp11987@lmecxl0573.lme1
[ 0.000000] CPU: ARMv7-M [410fc241] revision 1 (ARMv7M), cr=00000000
[ 0.000000] CPU: unknown data cache, unknown instruction cache
[ 0.000000] OF: fdt: Machine model: STMicroelectronics STM32F429i-DISCO board
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000090000000-0x00000000907fffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000090000000-0x00000000907fffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000090000000-0x00000000907fffff]
[ 0.000000] On node 0 totalpages: 2048
[ 0.000000] Normal zone: 16 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 2048 pages, LIFO batch:0
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping off. Total pages: 2032
[ 0.000000] Kernel command line: console=tty0 console=ttySTM0,115200 root=/dev/ram rdin2
[ 0.000000] Dentry cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 5264K/8192K available (1372K kernel code, 302K rwdata, 516K rodata,)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] rcu: Preemptible hierarchical RCU implementation.
[ 0.000000] rcu: RCU event tracing is enabled.
[ 0.000000] Trampoline variant of Tasks RCU enabled.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] /soc/interrupt-controller@40013c00: bank0
[ 0.000000] random: get_random_bytes called from start_kernel+0x203/0x370 with crng_ini0
[ 0.000000] clocksource: arm_system_timer: mask: 0xffffff max_cycles: 0xffffff, max_idls
[ 0.000000] ARM System timer initialized as clocksource
[ 0.000026] sched_clock: 32 bits at 90MHz, resolution 11ns, wraps every 23860929530ns
[ 0.000665] timer@40000c00: STM32 sched_clock registered
[ 0.001275] Switching to timer-based delay loop, resolution 11ns
[ 0.001712] timer@40000c00: STM32 delay timer registered
[ 0.002253] clocksource: timer@40000c00: mask: 0xffffffff max_cycles: 0xffffffff, max_is
[ 0.003076] /soc/timer@40000c00: STM32 clockevent driver initialized (32 bits)
[ 0.014135] Console: colour dummy device 80x30
[ 0.062375] printk: console [tty0] enabled
[ 0.063843] Calibrating delay loop (skipped), value calculated using timer frequency.. )
[ 0.066453] pid_max: default: 4096 minimum: 301
[ 0.071393] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.073734] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.104759] rcu: Hierarchical SRCU implementation.
[ 0.111552] devtmpfs: initialized
[ 0.339332] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns:s
[ 0.341835] pinctrl core: initialized pinctrl subsystem
[ 0.658423] stm32f429-pinctrl soc:pin-controller: No package detected, use default one
[ 0.680505] stm32f429-pinctrl soc:pin-controller: GPIOA bank added
[ 0.689824] stm32f429-pinctrl soc:pin-controller: GPIOB bank added
[ 0.699409] stm32f429-pinctrl soc:pin-controller: GPIOC bank added
[ 0.708775] stm32f429-pinctrl soc:pin-controller: GPIOD bank added
[ 0.718094] stm32f429-pinctrl soc:pin-controller: GPIOE bank added
[ 0.727535] stm32f429-pinctrl soc:pin-controller: GPIOF bank added
[ 0.736953] stm32f429-pinctrl soc:pin-controller: GPIOG bank added
[ 0.746404] stm32f429-pinctrl soc:pin-controller: GPIOH bank added
[ 0.756098] stm32f429-pinctrl soc:pin-controller: GPIOI bank added
[ 0.765436] stm32f429-pinctrl soc:pin-controller: GPIOJ bank added
[ 0.774870] stm32f429-pinctrl soc:pin-controller: GPIOK bank added
[ 0.776730] stm32f429-pinctrl soc:pin-controller: Pinctrl STM32 initialized
[ 0.997446] stm32-dma 40026000.dma-controller: STM32 DMA driver registered
[ 1.029604] stm32-dma 40026400.dma-controller: STM32 DMA driver registered
[ 1.043098] clocksource: Switched to clocksource timer@40000c00
[ 1.358086] workingset: timestamp_bits=30 max_order=11 bucket_order=0
[ 1.632751] io scheduler mq-deadline registered
[ 1.634287] io scheduler kyber registered
[ 1.650574] STM32 USART driver initialized
[ 1.661272] 40011000.serial: ttySTM0 at MMIO 0x40011000 (irq = 34, base_baud = 5625000)t
[ 2.603317] random: fast init done
[ 2.637564] printk: console [ttySTM0] enabled
[ 2.747984] panel-ilitek-ili9341 spi0.1: get optional vcc failed
[ 2.758986] spi_stm32 40015000.spi: driver initialized
[ 2.795733] i2c /dev entries driver
[ 2.849955] stmpe-i2c 0-0041: stmpe811 detected, chip id: 0x811
[ 2.922030] stmpe-ts stmpe-ts: DMA mask not set
[ 2.965729] input: stmpe-ts as /devices/platform/soc/40005c00.i2c/i2c-0/0-0041/stmpe-ts0
[ 2.991570] stm32f4-i2c 40005c00.i2c: STM32F4 I2C driver registered
[ 3.058262] [drm] Initialized stm 1.0.0 20170330 for 40016800.display-controller on min0
[ 3.665951] panel-ilitek-ili9341 spi0.1: initialized display rgb interface
[ 3.765208] Console: switching to colour frame buffer device 30x40
[ 4.014269] stm32-display 40016800.display-controller: [drm] fb0: stmdrmfb frame buffere
[ 4.212737] Freeing unused kernel memory: 324K
[ 4.287300] This architecture does not have kernel memory protection.
[ 4.401202] Run /linuxrc as init process
[ 4.478622] with arguments:
[ 4.555069] /linuxrc
[ 4.595406] with environment:
[ 4.672213] HOME=/
[ 4.712511] TERM=linux
[ 206.785289] random: crng init done


>
> If possible, you can try my suggestion.
> - tar -jxf stm32_rootfs.tar.bz2
> - add stm32_rootfs to your kernel config( enable initramfs)

As explained above, that's what i did

> - make O=YOUR_KERNEL_OUT zImage dtbs LOADADDR=0x90008000



> - create itb file (combine dtb and kernel, initramfs) by mkimage
> ./mkimage -f stm32.its stm32.itb

I didn't use .itb file, but directly uImage loaded @0x90406000 and stm32f429-disco.dtb loaded @0x90400000

How do you generate .its file ?


> (before above command, make sure you correct stm32.its adapt to your env)
>
> This process will make u-boot to load the kernel more simple.
>
> Thanks.
>
> Best Regards.
> Dillon
>
>
>>
>>
>> I can't test your I2C patch.
>>
>> Patrice
>>
>>
>>> -- setup ts_calibrate running env on stm32f429-disco
>>> / # export TSLIB_CONFFILE=/etc/ts.conf
>>> / # export TSLIB_TSDEVICE=/dev/input/event0
>>> / # export TSLIB_CONSOLEDEVICE=none
>>> / # export TSLIB_FBDEVICE=/dev/fb0
>>>
>>> -- clear screen
>>> / # ./fb
>>>
>>> -- run ts_calibrate
>>> / # ts_calibrate
>>> (you can calibrate touchscreen now, and get below errors)
>>>
>>> [ 113.942087] stmpe-i2c0-0041: failed to read regs 0x52: -110
>>> [ 114.063598] stmpe-i2c 0-0041: failed to read reg 0x4b: -16
>>> [ 114.185629] stmpe-i2c 0-0041: failed to read reg 0x40: -16
>>> [ 114.307257] stmpe-i2c 0-0041: failed to write reg 0xb: -16
>>>
>>> ...
>>> with i2c patch applied, you will find below logs:
>>>
>>> RAW---------------------> 3164 908 183 118.110884
>>> TS_READ_RAW----> x = 3164, y =908, pressure = 183
>>> RAW---------------------> 3166 922 126 118.138946
>>> TS_READ_RAW----> x = 3166, y = 922, pressure = 126
>>> ....
>>>
>>> files link:
>>> https://drive.google.com/drive/folders/1qNbjChcB6UGtKzne2F5x9_WG_sZFyo3o?usp=sharing
>>>
>>>
>>>
>>>
>>> Dillon Min (4):
>>> drm/panel: Add ilitek ili9341 panel driver
>>> i2c: stm32f4: Fix stmpe811 get xyz data timeout issue
>>> clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate
>>> clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after
>>> kernel startup
>>>
>>> drivers/clk/clk-stm32f4.c | 10 +-
>>> drivers/gpu/drm/panel/Kconfig | 12 +
>>> drivers/gpu/drm/panel/Makefile | 1 +
>>> drivers/gpu/drm/panel/panel-ilitek-ili9341.c | 1285 ++++++++++++++++++++++++++
>>> drivers/i2c/busses/i2c-stm32f4.c | 12 +-
>>> 5 files changed, 1310 insertions(+), 10 deletions(-)
>>> create mode 100755 drivers/gpu/drm/panel/panel-ilitek-ili9341.c
>>>