Messages in this thread | | | Date | Mon, 15 Mar 2021 00:49:03 +0530 | From | Sai Prakash Ranjan <> | Subject | Re: [PATCH V1 2/6] soc: qcom: dcc: Add driver support for Data Capture and Compare unit(DCC) |
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On 2021-03-11 22:04, Bjorn Andersson wrote: > On Thu 11 Mar 04:06 CST 2021, schowdhu@codeaurora.org wrote: > >> On 2021-03-11 04:49, Bjorn Andersson wrote: >> > On Wed 10 Mar 10:46 CST 2021, Souradeep Chowdhury wrote: >> > >> > > The DCC is a DMA Engine designed to capture and store data >> > > during system crash or software triggers. The DCC operates >> > > based on link list entries which provides it with data and >> > > addresses and the function it needs to perform. These >> > > functions are read, write and loop. Added the basic driver >> > > in this patch which contains a probe method which instantiates >> > > the resources needed by the driver. DCC has it's own SRAM which >> > > needs to be instantiated at probe time as well. >> > > >> > >> > So to summarize, the DCC will upon a crash copy the configured region >> > into the dcc-ram, where it can be retrieved either by dumping the memory >> > over USB or from sysfs on the next boot? >> >> Replied by Sai >> > > Thanks Souradeep and Sai, I'm definitely interested in learning more > about what the hardware block can do and how we can use it. >
Thanks Bjorn, hopefully example in the other thread provides some good view of the capability of DCC. Please let us know if you need any more details.
Thanks, Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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