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SubjectRe: [PATCH] modified: gpu/drm/panfrost/panfrost_gpu.c
于 Fri, 11 Jun 2021 11:10:16 +0100
Steven Price <steven.price@arm.com> 写道:

> On 10/06/2021 14:06, Chunyou Tang wrote:
> > Hi Steven,
>
> Hi Chunyou,
>
> For some reason I'm not directly receiving your emails (only via the
> list) - can you double check your email configuration?
>
> >>> The GPU exception fault status register(0x3C),the low 8 bit is the
> >>> EXCEPTION_TYPE.We can see the description at P3-78 in spec.
> >
> > You can see the spec
> > <arm_heimdall_technical_reference_manual_100612_0001_00_en.pdf>.
>
> Thanks - please include that in the commit message - there are many
> TRMs (one for each GPU) so without the information about exactly which
> specification the page number is pretty useless. Sadly this
> documentation isn't public which would be even better but I don't
> think there are any public specs for this information.
>
> >> However this change is correct - panfrost_exception_name() should
> >> be taking only the lower 8 bits. Even better though would be to to
> >> report the full raw fault information as well as the high bits can
> >> contain useful information:
> >>
> >> dev_warn(pfdev->dev, "GPU Fault 0x%08x (%s) at
> >> 0x%016llx\n", fault_status,
> >> panfrost_exception_name(pfdev, fault_status &
> >> 0xFF), address);
> >
> > So I change it according to what you said?
>
> Yes, please send a v2.
>
> Thanks,
>
> Steve
>
> > 于 Thu, 10 Jun 2021 11:41:52 +0100
> > Steven Price <steven.price@arm.com> 写道:
> >
> >> The subject should have the prefix "drm/panfrost" and should
> >> mention what the patch is changing (not just the filename).
> >>
> >> On 09/06/2021 07:38, ChunyouTang wrote:
ok
> >>> From: tangchunyou <tangchunyou@163.icubecorp.cn>
> >>>
> >>> The GPU exception fault status register(0x3C),the low 8 bit is the
> >>> EXCEPTION_TYPE.We can see the description at P3-78 in spec.
> >>
> >> Nit: When referring to a spec it's always good to mention the name
> >> - I'm not sure which specification you found this in.
> >>
> >>>
> >>> Signed-off-by: tangchunyou <tangchunyou@163.icubecorp.cn>
> >>> ---
> >>> drivers/gpu/drm/panfrost/panfrost_gpu.c | 2 +-
> >>> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>>
> >>> diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c
> >>> b/drivers/gpu/drm/panfrost/panfrost_gpu.c index
> >>> 2aae636f1cf5..1fffb6a0b24f 100644 ---
> >>> a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++
> >>> b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -33,7 +33,7 @@ static
> >>> irqreturn_t panfrost_gpu_irq_handler(int irq, void *data) address
> >>> |= gpu_read(pfdev, GPU_FAULT_ADDRESS_LO);
> >>> dev_warn(pfdev->dev, "GPU Fault 0x%08x (%s) at
> >>> 0x%016llx\n",
> >>> - fault_status & 0xFF,
> >>> panfrost_exception_name(pfdev, fault_status),
> >>> + fault_status & 0xFF,
> >>> panfrost_exception_name(pfdev, fault_status & 0xFF),
> >>
> >> However this change is correct - panfrost_exception_name() should
> >> be taking only the lower 8 bits. Even better though would be to to
> >> report the full raw fault information as well as the high bits can
> >> contain useful information:
> >>
> >> dev_warn(pfdev->dev, "GPU Fault 0x%08x (%s) at
> >> 0x%016llx\n", fault_status,
> >> panfrost_exception_name(pfdev, fault_status &
> >> 0xFF), address);
> >>
> >> Thanks,
> >>
> >> Steve
> >>
> >>> address);
> >>>
> >>> if (state & GPU_IRQ_MULTIPLE_FAULT)
> >>>
> >
> >

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