In our hardware design, by combining a funnel and a replicator, it implement a hardware device with one-to-one correspondence between output ports and input ports. The programming usage on this device is the same as funnel. The software uses a funnel and a static replicator to implement the driver of this device. Since original funnels only support a single output connection and original replicator only support a single input connection, the code needs to be modified to support this new feature. The following is a typical topology diagram of multi-port output mechanism. |----------| |---------| |----------| |---------| | TPDM 0 | | Source0 | | Source 1 | | TPDM 1 | |----------| |---------| |----------| |---------| | | | | | | | | | --------- | | | | | | | | | | | | | | | -------------/ ---------------------- | \ Funnel 0 / | | ----------- | ------------------------------ | | | | | | ------------------/ \ Funnel 1 / ----| --------------/ | | |----> Combine a funnel and a | | static replicator /-----------------\ | / replicator 0 \ ----| /---------------------\ | | | | | |-----------| | |---------| | | |TPDM0 |TPDM1 | -----------------/ | \ TPDA 0 / | -------------/ | | | | |Source0/1 | -------------------------------/ \ Funnel 2 / ---------------------------/
Changes in V1: 1. Add a static replicator connect to a funnel to implement the correspondence between the output ports and the input ports on funnels. -- Suzuki K Poulose 2. Add filter_src_dev and filter_src_dev phandle to "coresight_connection" struct, and populate them if there is one. -- Suzuki K Poulose 3. To look at the phandle and then fixup/remove the filter_src device in fixup/remove connections. -- Suzuki K Poulose 4. When TPDA reads DSB/CMB element size, it is implemented by looking up filter src device in the connections. -- Suzuki K Poulose
Tao Zhang (3): dt-bindings: arm: qcom,coresight-static-replicator: Add property for source filtering coresight: Add source filtering for multi-port output coresight-tpda: Optimize the function of reading element size
.../arm/arm,coresight-static-replicator.yaml | 18 +++- drivers/hwtracing/coresight/coresight-core.c | 89 ++++++++++++++++--- .../hwtracing/coresight/coresight-platform.c | 13 +++ drivers/hwtracing/coresight/coresight-tpda.c | 6 +- include/linux/coresight.h | 5 ++ 5 files changed, 115 insertions(+), 16 deletions(-)