On 18-10-21, 12:24, Stephan Gerhold wrote: > The BAM Data Multiplexer (BAM-DMUX) provides access to the network data > channels of modems integrated into many older Qualcomm SoCs, e.g. > Qualcomm MSM8916 or MSM8974. > > Shortly said, BAM-DMUX is built using a simple protocol layer on top of > a DMA engine (Qualcomm BAM DMA). For BAM-DMUX, the BAM DMA engine runs in > a special mode where the modem/remote side is responsible for powering > on the BAM when needed but we are responsible to initialize it. > The BAM is powered off when unneeded by coordinating power control > via bidirectional interrupts from the BAM-DMUX driver. > > This series adds one possible solution for handling the "powered remotely" > mode in the bam_dma driver. This looks good me me. Bhupesh/Stephan what was the conclusion on the the discussion you folks had? > > For more information about BAM-DMUX itself, see the series on netdev: > https://lore.kernel.org/netdev/20211011141733.3999-5-stephan@xxxxxxxxxxx/ > > Changes in v3: > - Split dmaengine changes to a separate series > - Address review comments from Bjorn > > v2: https://lore.kernel.org/netdev/20211011141733.3999-1-stephan@xxxxxxxxxxx/ > RFC: https://lore.kernel.org/netdev/20210719145317.79692-1-stephan@xxxxxxxxxxx/ > > > Stephan Gerhold (2): > dt-bindings: dmaengine: bam_dma: Add "powered remotely" mode > dmaengine: qcom: bam_dma: Add "powered remotely" mode > > .../devicetree/bindings/dma/qcom_bam_dma.txt | 2 + > drivers/dma/qcom/bam_dma.c | 90 ++++++++++++------- > 2 files changed, 59 insertions(+), 33 deletions(-) > > -- > 2.33.0 -- ~Vinod
