Re: [PATCH v2 0/8] Add AMD ISP4 driver

Du, Bin
2025-08-04T03:32:23Z

Hi Sultan,

This is the conclusion of your test,
Driver:
https://github.com/amd/Linux_ISP_Kernel/commit/c6d42584fbd0aa42cc91ecf16dc5c4f3dfea0bb4
[1] It works on FW 8f070131(ext):39b00736(int)
[2] It can't work on FW 1cc8c1bf(ext):50582024(int)

Would you please help to check if CONFIG_VIDEO_OV05C is defined not in
the .config file when building the kernel? Our assumption is to make [1]
work, CONFIG_VIDEO_OV05C shouldn't be defined. to make [2] work,
CONFIG_VIDEO_OV05C should be defined.

Regards,
Bin

On 7/31/2025 6:04 PM, Du, Bin wrote:
> Thanks Sultan for your test
>
> On 7/31/2025 8:30 AM, Sultan Alsawaf wrote:
>> On Wed, Jul 30, 2025 at 05:53:58PM +0800, Du, Bin wrote:
>>> On 7/30/2025 1:38 PM, Sultan Alsawaf wrote:
>>>> On Tue, Jul 29, 2025 at 06:13:50PM +0800, Du, Bin wrote:
>>>>> On 7/29/2025 3:45 PM, Sultan Alsawaf wrote:
>>>>>> On Tue, Jul 29, 2025 at 12:42:16AM -0700, Sultan Alsawaf wrote:
>>>>>>> On Tue, Jul 29, 2025 at 11:32:23AM +0800, Du, Bin wrote:
>>>>>>>> Thanks Sultan, please see my comments
>>>>>>>>
>>>>>>>> On 7/27/2025 6:31 AM, Sultan Alsawaf wrote:
>>>>>>>>> On Fri, Jul 25, 2025 at 06:22:03PM +0800, Du, Bin wrote:
>>>>>>>>>>> I have the Ryzen AI MAX+ 395 SKU of the HP ZBook Ultra G1a 14.
>>>>>>>>>>>
>>>>>>>>>>> I cannot for the life of me get the webcam working under
>>>>>>>>>>> Linux. The webcam works
>>>>>>>>>>> under Windows so it's not a hardware issue.
>>>>>>>>>>>
>>>>>>>>>>> With this patchset and all of the patches you link here
>>>>>>>>>>> applied to 6.15, I get
>>>>>>>>>>> the following errors:
>>>>>>>>>>>        [   11.970038] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware: Unknown Synopsys component type:
>>>>>>>>>>> 0xffffffff
>>>>>>>>>>>        [   11.973162] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware: error -19: i2c_dw_probe failed
>>>>>>>>>>>
>>>>>>>>>>> With the old ispkernel code from February [1] applied on
>>>>>>>>>>> 6.15, the webcam
>>>>>>>>>>> indicator LED lights up but there's no image. I see these
>>>>>>>>>>> messages at boot:
>>>>>>>>>>>        [    9.449005] amd_isp_capture amd_isp_capture.1.auto:
>>>>>>>>>>> amdgpu: AMD ISP v4l2 device registered
>>>>>>>>>>>        [    9.489005] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware.2.auto: The OV05 sensor device is
>>>>>>>>>>> added to the ISP I2C bus
>>>>>>>>>>>        [    9.529012] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware.2.auto: timeout while trying to abort
>>>>>>>>>>> current transfer
>>>>>>>>>>>        [    9.554046] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware.2.auto: timeout in disabling adapter
>>>>>>>>>>>        [    9.554174] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware.2.auto: timeout while trying to abort
>>>>>>>>>>> current transfer
>>>>>>>>>>>        [    9.580022] amd_isp_i2c_designware
>>>>>>>>>>> amd_isp_i2c_designware.2.auto: timeout in disabling adapter
>>>>>>>>>>>
>>>>>>>>>>> And then the kernel crashes due to the same use-after-free
>>>>>>>>>>> issues I pointed out
>>>>>>>>>>> in my other email [2].
>>>>>>>>>>>
>>>>>>>>>>> Any idea what's going on?
>>>>>>>>>>>
>>>>>>>>>>> [1] https://github.com/amd/Linux_ISP_Kernel/commit/
>>>>>>>>>>> c6d42584fbd0aa42cc91ecf16dc5c4f3dfea0bb4
>>>>>>>>>>> [2] https://lore.kernel.org/r/aIEiJL83pOYO8lUJ@sultan-box
>>>>>>>>>> Hi Sultan,
>>>>>>>>>>
>>>>>>>>>> [1] is for kernel 6.8, believe it can't be applied to 6.15. We
>>>>>>>>>> didn't verify
>>>>>>>>>> on 6.15 but we are really glad to help, would you please
>>>>>>>>>> provide some info,
>>>>>>>>>> 1. Suppose you are using Ubuntu, right? What's the version?
>>>>>>>>>> 2. 6.15, do you mean https://github.com/torvalds/linux/tree/
>>>>>>>>>> v6.15 ?
>>>>>>>>>>
>>>>>>>>>> After your confirmation, we'll see what we can do to enable
>>>>>>>>>> your camera
>>>>>>>>>> quickly and easily
>>>>>>>>>>
>>>>>>>>>> Regards,
>>>>>>>>>> Bin
>>>>>>>>>
>>>>>>>>> Thank you, Bin!
>>>>>>>>>
>>>>>>>>> 1. I'm using Arch Linux with the ISP4-patched libcamera [1].
>>>>>>>>> 2. Yes, here is my kernel source [2].
>>>>>>>>>
>>>>>>>>> I have some more findings:
>>>>>>>>>
>>>>>>>>> Currently, the first blocking issue is that the I2C adapter
>>>>>>>>> fails to initialize.
>>>>>>>>> This is because the ISP tile isn't powered on.
>>>>>>>>>
>>>>>>>>> I noticed that in the old version of amd_isp_i2c_designware
>>>>>>>>> [3], there were
>>>>>>>>> calls to isp_power_set(), which is available in the old ISP4
>>>>>>>>> sources [4].
>>>>>>>>> Without isp_power_set(), the I2C adapter always fails to
>>>>>>>>> initialize for me.
>>>>>>>>>
>>>>>>>>> How is the ISP tile supposed to get powered on in the current
>>>>>>>>> ISP4 code?
>>>>>>>>>
>>>>>>>> You are correct, yes, i believe the I2C adapter failure is
>>>>>>>> caused by ISP not
>>>>>>>> being powered up. Currently in latest code, isp_power_set is no
>>>>>>>> longer
>>>>>>>> available, instead, we implemented genPD for ISP in amdgpu
>>>>>>>> https://lore.kernel.org/all/20250618221923.3944751-1-
>>>>>>>> pratap.nirujogi@amd.com/
>>>>>>>> Both amd_isp_i2c and amd_isp_capture are in the power domain and
>>>>>>>> use the
>>>>>>>> standard runtime PM API to do the power control
>>>>>>>
>>>>>>> Thanks for that link, I found it along with another patch on the
>>>>>>> list to make
>>>>>>> the fwnode work ("drm/amd/amdgpu: Initialize swnode for ISP MFD
>>>>>>> device").
>>>>>>>
>>>>>>>>> Also, I noticed that the driver init ordering matters between
>>>>>>>>> all of the drivers
>>>>>>>>> needed for the ISP4 camera. In particular,
>>>>>>>>> amd_isp_i2c_designware and amd_isp4
>>>>>>>>> must be initialized before amd_capture, otherwise amd_capture
>>>>>>>>> will fail to find
>>>>>>>>> the fwnode properties for the OV05C10 device attached to the
>>>>>>>>> I2C bus.
>>>>>>>>>
>>>>>>>>> But there is no driver init ordering enforced, which also
>>>>>>>>> caused some issues for
>>>>>>>>> me until I figured it out. Maybe probe deferral (-EPROBE_DEFER)
>>>>>>>>> should be used
>>>>>>>>> to ensure each driver waits for its dependencies to init first?
>>>>>>>>>
>>>>>>>> amd_isp_capture only has dependency on amd_isp4 which is the
>>>>>>>> ACPI platform
>>>>>>>> driver, it is init before amd_isp_catpure.
>>>>>>>> Do you see in your side the amd_capture probe failure caused by
>>>>>>>> failing to
>>>>>>>> read fwnode properties? If that's the case please help to check
>>>>>>>> if amd_isp4
>>>>>>>> is loaded successfully
>>>>>>>
>>>>>>> I got much further now: there aren't any driver initialization
>>>>>>> errors, but when
>>>>>>> I open the camera, there's no image. The camera LED turns on so
>>>>>>> it's active.
>>>>>>>
>>>>>>> And then shortly afterwards, amdgpu dies and the entire system
>>>>>>> freezes.
>>>>>>>
>>>>>>> I've attached my full dmesg, please let me know what you think.
>>>>>>> Thanks!
>>>>>>
>>>>>> I almost forgot, here is my current kernel tree:
>>>>>> https://github.com/kerneltoast/kernel_x86_laptop/tree/v6.16-
>>>>>> sultan-isp4
>>>>>>
>>>>>> Sultan
>>>>>
>>>>> Thanks Sultan, yes, seems much close to the final success. Will
>>>>> have some
>>>>> internal discussion.
>>>>
>>>> I got the webcam working. The same bug happened when I tried
>>>> Ubuntu's linux-oem
>>>> kernel, which made me think that the issue was firmware.
>>>>
>>>> And indeed, the culprit was a firmware update from February. I bisected
>>>> linux-firmware and found the commit which broke the webcam for me:
>>>>
>>>>     commit 1cc8c1bfa11251ce8bfcc97d1f15e312f7fe4df0 (HEAD)
>>>>     Author: Pratap Nirujogi <pratap.nirujogi@amd.com>
>>>>     Date:   Wed Feb 19 12:16:51 2025 -0500
>>>>
>>>>         amdgpu: Update ISP FW for isp v4.1.1
>>>>
>>>>         From internal git commit:
>>>>         5058202443e08a673b6772ea6339efb50853be28
>>>>
>>>>         Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com>
>>>>
>>>>      amdgpu/isp_4_1_1.bin | Bin 4543184 -> 6083536 bytes
>>>>      1 file changed, 0 insertions(+), 0 deletions(-)
>>>>
>>>> Downgrading firmware to before that commit fixes the webcam. Any
>>>> idea why?
>>>>
>>>> Thanks,
>>>> Sultan
>>>
>>> So, can i say the working firmware binary is this one?
>>>
>>> Commit 8f070131
>>> amdgpu: Update ISP FW for isp v4.1.1
>>>
>>>  From internal git commit:
>>> 39b007366cc76ef8c65e3bc6220ccb213f4861fb
>>>
>>> Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com>
>>
>> Correct.
>>
>>> There are too many changes between them, so i can't tell exactly which
>>> change caused this. So, from my side
>>> 1. Will try these two firmware to see if we have the same issue.
>>> 2. It has been quite a long time since last release, will see if need to
>>> release a latest one.
>>
>> Thanks. It was a quick bisect for me, so I'm happy to help test if a
>> bisect
>> between those two internal git commits is needed.
>>
> Really appreciate your test.
>> In case it makes a difference, I have the laptop with the 2.8K OLED
>> display. I'm
>> aware there is one other display variant on other SKUs, which is a
>> WUXGA IPS.
>>
> Good to know, I believe it won't make any difference for ISP
>
>> Also, with that old firmware, my camera only works with the old isp4
>> driver from
>> that Linux_ISP_Kernel repo (which is the same isp4 driver used in
>> Ubuntu's
>> linux-oem kernel). Does the new isp4 driver you've submitted here
>> require newer
>> firmware than the old driver located in Linux_ISP_Kernel?
>>
>> Sultan
>
> We had a try, yes, both of the old FW can't work on the new ISP4 driver,
> as you know, for the last months, we did lots of driver modifications
> for upstream and cause it incompatible with old FW.
> Now, under internal discussion to upstream a new FW to support the new
> ISP driver
>
> Regards,
> Bin
>