[Letux-kernel] LetuxOS: kernel: letux-5.5-rc1

[H. Nikolaus Schaller]

> Am 12.12.2019 um 15:41 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> 
> 
>> Am 12.12.2019 um 10:06 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>> 
>> 
>>> Am 11.12.2019 um 19:00 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>> 
>>> 
>>>> Am 11.12.2019 um 17:03 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>> 
>>>> 
>>>>> Am 10.12.2019 um 22:05 schrieb Andreas Kemnade <andreas at kemnade.info>:
>>>>> 
>>>>> On Tue, 10 Dec 2019 21:51:52 +0100
>>>>> "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
>>>>> 
>>>>>>> Am 10.12.2019 um 20:57 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>> 
>>>>>>> 
>>>>>>>> Am 10.12.2019 um 19:01 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>>> 
>>>>>>>> Next, I'll try to build with your defconfig.  
>>>>>> 
>>>>>> I have simply copied it to arch/arm/configs/letux_defconfig. Then it will
>>>>>> be taken by my scripts.
>>>>>> 
>>>>>>> 
>>>>>>> Hm:
>>>>>>> 
>>>>>>> LD [M]  lib/crypto/libdes.o - due to: lib/crypto/des.o
>>>>>>> Building modules, stage 2.
>>>>>>> MODPOST 436 modules - due to target is PHONY
>>>>>>> ERROR: "input_unregister_polled_device" [drivers/iio/industrialio.ko] undefined!
>>>>>>> ERROR: "input_register_polled_device" [drivers/iio/industrialio.ko] undefined!
>>>>>>> ERROR: "devm_input_allocate_polled_device" [drivers/iio/industrialio.ko] undefined!
>>>>>>> make[3]: *** [__modpost] Error 1
>>>>>>> make[2]: *** [modules] Error 2
>>>>>>> make[1]: *** [__build_one_by_one] Error 2
>>>>>>> make: *** [sub-make] Error 2
>>>>>>> 
>>>>>>> $head->scratch()  
>>>>>> 
>>>>>> Ok, I have disabled the IIO_INPUT_BRIDGE.
>>>>>> 
>>>>>> Now I can compile
>>>>>> ...
>>>>>> ...
>>>>>> ...
>>>>>> and it boots. Also without display. There is no td028ttec1 panel driver in
>>>>>> modprobe -c. Indeed, CONFIG_DRM_PANEL_TPO_TD028TTEC1=m is not in your config.
>>>>>> CONFIG_DRM_OMAP_PANEL_TPO_TD028TTEC1=m is but that does no longer exist in
>>>>>> v5.5-rc1.
>>>>>> 
>>>>> well, no need for that on the letux 3704.
>>>> 
>>>> Indeed... I think the missing panel is a secondary bug.
>>>> 
>>>> I think I have boiled it down to
>>>> 
>>>> CONFIG_ARCH_BCM=y or n
>>>> 
>>>> (or one of the subconfigs enabled by that).
>>>> 
>>>> Will need a clean test though.
>>> 
>>> Well, unfortunately this is not sufficient alone.
>>> Seems to need more than one config to be disabled :(
>>> 
>>> Unfortunately I have no good strategy to bisect this.
>>> 
>>> Maybe I could take the good letux_defconfig that I have
>>> found, do a git reset and then by git add -p create
>>> small chunks of changes. And then a git bisect on this
>>> sequence?
>> 
>> Yes, that works. And seems to confirm the finding:
>> 
>> 86b283cbdaf695009ee6d967e7314162839c696f is the first bad commit
>> commit 86b283cbdaf695009ee6d967e7314162839c696f
>> Author: H. Nikolaus Schaller <hns at goldelico.com>
>> Date:   Thu Dec 12 06:43:21 2019 +0100
>> 
>>   autosplit
>> 
>> arch/arm/configs/letux_defconfig | 2 ++
>> 1 file changed, 2 insertions(+)
>> iMac:master hns$ git show 86b283cbdaf695009ee6d967e7314162839c696f
>> commit 86b283cbdaf695009ee6d967e7314162839c696f (refs/bisect/bad)
>> Author: H. Nikolaus Schaller <hns at goldelico.com>
>> Date:   Thu Dec 12 06:43:21 2019 +0100
>> 
>>   autosplit
>> 
>> diff --git a/arch/arm/configs/letux_defconfig b/arch/arm/configs/letux_defconfig
>> index 4d9c6c029e8b..e75831642f26 100644
>> --- a/arch/arm/configs/letux_defconfig
>> +++ b/arch/arm/configs/letux_defconfig
>> @@ -25,6 +25,8 @@ CONFIG_BLK_DEV_INITRD=y
>> CONFIG_CC_OPTIMIZE_FOR_SIZE=y
>> CONFIG_SLAB=y
>> CONFIG_PROFILING=y
>> +CONFIG_ARCH_BCM=y
>> +CONFIG_ARCH_BCM2835=y
>> CONFIG_ARCH_MXC=y
>> CONFIG_POWER_AVS_OMAP=y
>> CONFIG_POWER_AVS_OMAP_CLASS3=y
>> iMac:master hns$ 
>> 
>> Well, I did start with a good config and this change makes it a bad one.
>> But the good one may have changed other configs.
>> 
>> I think I should reverse the good/bad tagging and start with original
>> letux-5.5-rc1 bad defconfig until it starts to work.
>> 
>> The basic principle is (well, I had to abort the loop manually):
>> 
>> GOOD=5aaa71815c46
>> BAD=letux-5.5-rc1
>> git checkout -B working-branch $GOOD
>> ARCH=arm make letux_defconfig savedefconfig
>> mv defconfig arch/arm/configs/letux_defconfig
>> git commit -m 'good' -a
>> git checkout $BAD -- arch/arm/configs/letux_defconfig
>> git reset HEAD
>> ARCH=arm make letux_defconfig savedefconfig
>> mv defconfig arch/arm/configs/letux_defconfig
>> 
>> while true
>> do
>> (echo s; echo s; echo s; echo s; echo s; echo y; echo q) | git add -p
>> git commit -m 'autosplit' | break
>> done
> 
> I now did run the bisect in reverse direction and it also says that the
> first problematic config is CONFIG_ARCH_BCM && CONFIG_ARCH_BCM2835.
> 
> But removing just this from the current letux_defconfig doesn't
> seem to help.
> 
> Therefore I can only assume that reducing to savedefconfig and expanding
> back gives a different result for some default settings.
> 
> Well, just
> 
> diff --git a/arch/arm/configs/letux_defconfig b/arch/arm/configs/letux_defconfig
> index 91d0d6934ca6..c45ae1bae650 100644
> --- a/arch/arm/configs/letux_defconfig
> +++ b/arch/arm/configs/letux_defconfig
> @@ -1,12 +1,13 @@
> #
> +# Automatically generated file; DO NOT EDIT.
> # Linux/arm 5.5.0-rc1 Kernel Configuration
> #
> 
> #
> -# Compiler: arm-linux-gnueabi-gcc (GCC) 4.9.2
> +# Compiler: gcc (MacPorts gcc49 4.9.4_5) 4.9.4
> #
> CONFIG_CC_IS_GCC=y
> -CONFIG_GCC_VERSION=40902
> +CONFIG_GCC_VERSION=40904
> CONFIG_CLANG_VERSION=0
> CONFIG_CC_CAN_LINK=y
> CONFIG_CC_HAS_ASM_GOTO=y
> @@ -130,6 +131,7 @@ CONFIG_GENERIC_SCHED_CLOCK=y
> #
> # end of Scheduler features
> 
> +CONFIG_CC_HAS_INT128=y
> CONFIG_CGROUPS=y
> # CONFIG_MEMCG is not set
> # CONFIG_BLK_CGROUP is not set
> iMac:master hns$ 
> 
> So I'll try again to disable CONFIG_ARCH_BCM && CONFIG_ARCH_BCM2835.

Yes, looks like I did a mistake with my initial attempt.

Now the GTA04 boots - but still without display. Anyways,
I now can finally analyse that.

Unfortunately it seems as if RasPi is currently broken with this kernel.

BR,
Nikolaus