Re: atomisp kernel driver(s)

[Patrik Gfeller <patrik.gfeller@gmail.com>]

On 20.04.20 22:47, Mauro Carvalho Chehab wrote:
> Em Mon, 20 Apr 2020 20:27:25 +0200
> Patrik Gfeller <patrik.gfeller@gmail.com> escreveu:
>
>> Me again ... sorry to ask such a basic question, but I can't get your
>> modified source code. I get the following error:
>>
>>   > git clone https://git.linuxtv.org/mchehab/experimental.git/
>> Cloning into 'experimental'...
>> warning: adding alternate object store:
>> https://git.linuxtv.org/git/linux.git/
>> warning: adding alternate object store:
>> https://git.linuxtv.org/git/media_tree.git/
>> warning: adding alternate object store:
>> https://git.linuxtv.org/git/linux.git/
>> error: Unable to find fc8670d1f72b746ff3a5fe441f1fca4c4dba0e6f under
>> https://git.linuxtv.org/mchehab/experimental.git
>> Cannot obtain needed object fc8670d1f72b746ff3a5fe441f1fca4c4dba0e6f
>> while processing commit 6d80bfc14608f4bb5514b79721d30b486f50c987.
>> error: fetch failed.
>>
>> Do I use the wrong command?
> Better to use git:// url:
>
> 	git clone git://git.linuxtv.org/mchehab/experimental.git/

I was able to download and compile the code. I installed the kernel and 
tried to boot; unfortunately it hangs with the message "Loading initial 
ramdisk ..." - after I start the old kernel I check kern.log and syslog 
- but I do not see entries from the failed boot attempt. I'll read into 
the topic and try around. This will take some time ... so there will be 
a dealy, but it's not that I do not care or lacking  interest, I just 
first have to sort this out.

>
>> kind regards,
>>
>> Patrik
>>
>> On 20.04.20 19:48, Patrik Gfeller wrote:
>>> On 20.04.20 01:31, Mauro Carvalho Chehab wrote:
>>>> Em Sat, 18 Apr 2020 17:37:22 +0200
>>>> Patrik Gfeller <patrik.gfeller@gmail.com> escreveu:
>>>>   
>>>>> On 18.04.20 17:26, Mauro Carvalho Chehab wrote:
>>>>>> Em Sat, 18 Apr 2020 17:25:49 +0200
>>>>>> Mauro Carvalho Chehab <mchehab+huawei@kernel.org> escreveu:
>>>>>>> Em Sat, 18 Apr 2020 16:39:25 +0200
>>>>>>> Patrik Gfeller <patrik.gfeller@gmail.com> escreveu:
>>>>>>>> Hello Mauro et al,
>>>>>>>>
>>>>>>>> I've recently switched to Linux, and I'm very impressed. Almost
>>>>>>>> everything thing works out of the box. Only the webcam on my
>>>>>>>> device does
>>>>>>>> not. I did some digging and if I'm right an atomisp driver would be
>>>>>>>> required. Is this correct? Below the output of lspci:
>>>>>>>>
>>>>>>>> 00:00.0 Host bridge: Intel Corporation Atom/Celeron/Pentium
>>>>>>>> Processor
>>>>>>>> x5-E8000/J3xxx/N3xxx Series SoC Transaction Register (rev 36)
>>>>>>>> 00:02.0
>>>>>>>> VGA compatible controller: Intel Corporation Atom/Celeron/Pentium
>>>>>>>> Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller
>>>>>>>> (rev 36)
>>>>>>>> 00:03.0 Multimedia controller: Intel Corporation
>>>>>>>> Atom/Celeron/Pentium
>>>>>>>> Processor x5-E8000/J3xxx/N3xxx Series Imaging Unit (rev 36) 00:0a.0
>>>>>>>> Non-VGA unclassified device: Intel Corporation Device 22d8 (rev 36)
>>>>>>>> 00:0b.0 Signal processing controller: Intel Corporation
>>>>>>>> Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Power
>>>>>>>> Management Controller (rev 36) 00:14.0 USB controller: Intel
>>>>>>>> Corporation
>>>>>>>> Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series USB xHCI
>>>>>>>> Controller (rev 36) 00:1a.0 Encryption controller: Intel Corporation
>>>>>>>> Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Trusted
>>>>>>>> Execution Engine (rev 36) 00:1c.0 PCI bridge: Intel Corporation
>>>>>>>> Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCI
>>>>>>>> Express
>>>>>>>> Port #1 (rev 36) 00:1f.0 ISA bridge: Intel Corporation
>>>>>>>> Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCU
>>>>>>>> (rev 36)
>>>>>>>> 01:00.0 Network controller: Qualcomm Atheros QCA9377 802.11ac
>>>>>>>> Wireless
>>>>>>>> Network Adapter (rev 31)
>>>> What hardware do you have?
>>> I have aASUS Transformer Book T101HA-GR029T (HW probe @
>>>
>>> https://linux-hardware.org/?probe=ccc26d4cd3).
>>>   
>>>> I did a look at the atomisp driver. There are some APIs that changed
>>>> upstream,
>>>> but making the driver to build again is not hard:
>>>>
>>>>      https://git.linuxtv.org/mchehab/experimental.git/log/?h=atomisp
>>>>
>>>> If this would work or just hang, I don't know :-)
>>> Cool!
>>>
>>> Meanwhile I downloaded to kernel source and checked out the latest
>>> commit that still has the driver in staging. I'm currently in the
>>> process of building the old kernel in order to test if the driver
>>> works at all (1st time I'm doing this - thus takes some time,
>>> especially on my Atom :-). But I will then switch over to your changed
>>> version to give it a try.
>>>   
>>>> This driver is still a big mess, and it requires some defines on its
>>>> source
>>>> code, in order to use it with some different Atom models.
>>>>   
>>>>>>>> According to the history it looks like the driver was removed
>>>>>>>> from the
>>>>>>>> kernel in 2018 and replaced with a dummy driver (to make sure
>>>>>>>> power save
>>>>>>>> works).
>>>>>>>>
>>>>>>>> Is there a chance that the atomisp driver will return to the kernel?
>>>>>>>> There are quite a few older tablets and 2in1 devices that would
>>>>>>>> benefit.
>>>>>>>> Unfortunately I do not understand the removed code (my coding
>>>>>>>> skills are
>>>>>>>> very basic) and can thus not help to change what ever is
>>>>>>>> necessary to
>>>>>>>> make it fit for the kernel :-( (does not sound like a beginner
>>>>>>>> project).
>>>>>>>> However - I would be glad to help out to help testing an ISP driver.
>>>>>>> There are simply too many things there to be fixed, and nobody
>>>>>>> without
>>>>>>> time for it. Also, the last reports we had is that the driver was not
>>>>>>> working.
>>>>>>>
>>>>>>> Unfortunately, I don't have myself any atomisp hardware, otherwise I
>>>>>>> could try fixing it on my spare time.
>>>>>> In time: not really sure if it would be a worth project, as newer
>>>>>> Intel
>>>>>> hardware are coming with a different IP block (IPU3).
>>>>> I don't know how widespread the IPU that I have is, I assume that some
>>>>> other tablets & 2in1 devices that are a few years old use it as well.
>>>> The IPU is used on some Dell 2in1 devices(I guess they use an i5core
>>>> with a chipset made for mobile market). Not sure if they're using IPU3
>>>> also on Atom.
>>>>   
>>>>> For me it would be definitely nice to have this driver. However, I can
>>>>> ask around in some of the forums  if there is a wider interest.
>>>>> Might be
>>>>> a niche tough, but the support for the Atom device I use have been
>>>>> greatly improved in the recent years. So there is at least some work
>>>>> going on for that platform (I do not know, but I think it is called
>>>>> cherry trail?). As there are many older reports of problems with audio,
>>>>> touchscreen, stability (freezes) ... and none of them are present
>>>>> anymore.
>>>>>
>>>>> As mentioned, if the development is hindered by missing hardware I
>>>>> would
>>>>> be glad to help. Anyhow - many thanks for your replies, much
>>>>> appreciated!
>>>>>   
>>>>>> Thanks,
>>>>>> Mauro
>>>>
>>>> Thanks,
>>>> Mauro
>>> thanks & kind regards,
>>>
>>> Patrik
>>>   
>
>
> Thanks,
> Mauro

kind regards,

Patrik