Hi Roger

Thanks for the heads up.

This is the tree that I am using to test this:
https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/3918592/7
( https://chromium.googlesource.com/chromiumos/third_party/kernel/+/3daf57d76c9e3d7c73d038ff2e43984412b503a2
)

You can use this tool for kexec:
https://chromium-review.googlesource.com/c/chromiumos/platform2/+/3953579

The syntax is kexec-lite  --reboot --kernel /boot/Image --cmdline
"$(cat /proc/cmdline)"

On Tue, 20 Dec 2022 at 15:50, Matthias Brugger [off-list ref] wrote:

On 20/12/2022 12:03, Roger Lu (陸瑞傑) wrote:

quoted

Hi Matthias Sir,

After applying this patch, SVS probes fail as below on my MT8192 platform. If
thing isn't too late, please do not merge this patch. I'll ask Ricardo how to
reproduce this issue and give the correct solution. Thanks in advance.

Ok, I just dropped the patch from v6.2-tmp/soc branch.

Regards,
Matthias

quoted

#MT8192 platform SVS probe fail log
[   10.209430]  SVSB_GPU_LOW: init02 completion timeout
[   10.214402] mtk-svs 1100b000.svs: svs start fail: -16
[   10.219479] mtk-svs: probe of 1100b000.svs failed with error -16

Hi Ricardo,

Could you share us how you reproduce this issue? I have MT8192 Chromebook and
can give it a try to reproduce the issue you encountered. Thanks a lot.

Sincerely,
Roger Lu.

On Fri, 2022-12-16 at 13:47 +0100, Matthias Brugger wrote:

quoted

On 30/11/2022 12:00, AngeloGioacchino Del Regno wrote:

quoted

Il 27/11/22 21:22, Ricardo Ribalda ha scritto:

quoted

If the system does not come from reset (like when is booted via
kexec()), the peripheral might triger an IRQ before the data structures
are initialised.

Fixes:

[    0.227710] Unable to handle kernel NULL pointer dereference at
virtual
address 0000000000000f08
[    0.227913] Call trace:
[    0.227918]  svs_isr+0x8c/0x538

Signed-off-by: Ricardo Ribalda <redacted>

Reviewed-by: AngeloGioacchino Del Regno <
angelogioacchino.delregno@collabora.com>

Applied thanks!

************* MEDIATEK Confidentiality Notice ********************
The information contained in this e-mail message (including any
attachments) may be confidential, proprietary, privileged, or otherwise
exempt from disclosure under applicable laws. It is intended to be
conveyed only to the designated recipient(s). Any use, dissemination,
distribution, printing, retaining or copying of this e-mail (including its
attachments) by unintended recipient(s) is strictly prohibited and may
be unlawful. If you are not an intended recipient of this e-mail, or believe
that you have received this e-mail in error, please notify the sender
immediately (by replying to this e-mail), delete any and all copies of
this e-mail (including any attachments) from your system, and do not
disclose the content of this e-mail to any other person. Thank you!

-- 
Ricardo Ribalda

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel