linux-kernel - Re: [PATCH v5 02/10] dt-bindings: mailbox: Add mboxes property for CMDQ secure driver

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Date: Thu, 4 Apr 2024 15:52:26 +0100
From: Conor Dooley <conor@...nel.org>
To: Jason-JH Lin (林睿祥) <Jason-JH.Lin@...iatek.com>
Cc: Shawn Sung (宋孝謙) <Shawn.Sung@...iatek.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	Houlong Wei (魏厚龙) <houlong.wei@...iatek.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	CK Hu (胡俊光) <ck.hu@...iatek.com>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>,
	"robh@...nel.org" <robh@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"matthias.bgg@...il.com" <matthias.bgg@...il.com>,
	"jassisinghbrar@...il.com" <jassisinghbrar@...il.com>,
	"angelogioacchino.delregno@...labora.com" <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v5 02/10] dt-bindings: mailbox: Add mboxes property for
 CMDQ secure driver

On Thu, Apr 04, 2024 at 04:31:06AM +0000, Jason-JH Lin (林睿祥) wrote:
> Hi Conor,
> 
> Thanks for the reviews.
> 
> On Wed, 2024-04-03 at 16:46 +0100, Conor Dooley wrote:
> > On Wed, Apr 03, 2024 at 06:25:54PM +0800, Shawn Sung wrote:
> > > From: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>
> > > 
> > > Add mboxes to define a GCE loopping thread as a secure irq handler.
> > > This property is only required if CMDQ secure driver is supported.
> > > 
> > > Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> > > Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
> > > ---
> > >  .../bindings/mailbox/mediatek,gce-mailbox.yaml         | 10
> > > ++++++++++
> > >  1 file changed, 10 insertions(+)
> > > 
> > > diff --git
> > > a/Documentation/devicetree/bindings/mailbox/mediatek,gce-
> > > mailbox.yaml
> > > b/Documentation/devicetree/bindings/mailbox/mediatek,gce-
> > > mailbox.yaml
> > > index cef9d76013985..c0d80cc770899 100644
> > > --- a/Documentation/devicetree/bindings/mailbox/mediatek,gce-
> > > mailbox.yaml
> > > +++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-
> > > mailbox.yaml
> > > @@ -49,6 +49,16 @@ properties:
> > >      items:
> > >        - const: gce
> > >  
> > > +  mediatek,gce-events:
> > > +    description:
> > > +      The event id which is mapping to the specific hardware event
> > > signal
> > > +      to gce. The event id is defined in the gce header
> > > +      include/dt-bindings/gce/<chip>-gce.h of each chips.
> > 
> > Missing any info here about when this should be used, hint - you have
> > it
> > in the commit message.
> > 
> > > +    $ref: /schemas/types.yaml#/definitions/uint32-arrayi
> > 
> > Why is the ID used by the CMDQ service not fixed for each SoC?
> > 
> I forgot to sync with Shawn about this:
> https://lore.kernel.org/all/20240124011459.12204-1-jason-
> jh.lin@...iatek.com
> 
> I'll fix it at the next version.

When I say "fixed" I don't mean "this is wrong, please fix it", I mean
"why is the value not static for a particular SoC". This needs to be
explained in the patch (and the description for the event here needs to
explain what the gce-mailbox is reserving an event for).

Thanks,
Conor.

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