Re: [PATCH V1 0/1] soc: qcom: dcc: Add QAD, Cti-trigger and Bootconfig support for Data Capture and Compare(DCC)

[Souradeep Chowdhury]

On 1/9/2023 8:48 PM, Bjorn Andersson wrote:
> On Mon, Jan 09, 2023 at 07:32:25PM +0530, Souradeep Chowdhury wrote:
> > This patch adds the Bootconfig, QAD and CTI-Trigger support for DCC.
>
> As with the other patch, please move your motivation into the commit
> message of the patch.
>
> That said, this seems to be 3 different topics, and hence should be
> three different patches.

Ack

> > 1.Bootconfig
> >
> > Bootconfig parser has been added to DCC driver so that the register addresses
> > can be configured during boot-time. This is used to debug crashes that can happen
> > during boot-time. The expected format of a bootconfig is as follows:-
> >
> > dcc_config {
> > 	link_list_0 {
> > 		qcom-curr-link-list = <The list number to configure>
> > 		qcom-link-list =  <Address as same format as dcc separated by '_'>,
> > 	}
> > }
> >
> > Example:
> >
> > dcc_config {
> > 	link_list_0 {
>
> The name of the node does not seem to have any significance; this could
> be nice to mention. I also think it would set a good precedence if you
> used the number of the qcom-curr-link-list in the node name, rather than
> just an iterator...

Ack

> > 		qcom-curr-link-list = 6
> > 		qcom-link-list = R_0x1781005c_1_apb,
> > 				 R_0x1782005c_1_apb
> > 	}
> > 	link_list_1 {
> > 		qcom-curr-link-list = 5
> > 		qcom-link-list = R_0x1784005c_1_apb
> > 	}
> > }
> >
> > 2.QAD
> >
> > QAD can be enabled as a part of debugfs file under each individual list folder.
> > QAD is used to specify the access control for DCC configurations, on enabling
> > it the access control to dcc configuration space is restricted.
>
> Who is locked out from this restricted access? Please mention why this
> is a good thing.

Ack

> > 3.CTI-trigger
> >
> > CTI trigger is used to enable the Cross trigger interface for DCC. On enabling
> > CTI trigger the dcc software trigger can be done by writing to CTI trig-out.
> > Also the hwtrigger debugfs file is created which needs to be disabled for enabling
> > CTI-trigger.
>
> Please mention why hwtrigger needs to be disabled, and why does it need
> to be disabled?

Ack

> > Changes in V1
> >
> > *Fixed the W=1 warnings in V0 of the patch
>
> Please follow the standard practice of giving your first version of a
> patch version 1.

Ack

> Thanks,
> Bjorn
>
> > Souradeep Chowdhury (1):
> >    soc: qcom: dcc: Add QAD, Ctitrigger and Bootconfig support for DCC
> >
> >   Documentation/ABI/testing/debugfs-driver-dcc |  24 +++
> >   drivers/soc/qcom/dcc.c                       | 284 ++++++++++++++++++++++++++-
> >   2 files changed, 304 insertions(+), 4 deletions(-)
> >
> > --
> > 2.7.4