On Tuesday 30 September 2014 03:44 AM, Andy Gross wrote: > On Mon, Sep 29, 2014 at 10:03:07AM +0530, Archit Taneja wrote: >> The BAM DMA IP comes in different versions. The register offset layout varies >> among these versions. The layouts depend on which generation/family of SoCs they >> belong to. >> >> The current SoCs(like 8084, 8074) have a layout where the Top level registers >> come in the beginning of the address range, followed by pipe and event >> registers. The BAM revision numbers fall above 1.4.0. >> >> The older SoCs (like 8064, 8960) have a layout where the pipe registers come >> first, and the top level come later. These have BAM revision numbers lesser than >> 1.4.0. >> >> It isn't suitable to have macros provide the register offsets with the layouts >> changed. Future BAM revisions may have different register layouts too. The >> register addresses are now calculated by referring a table which contains a base >> offset and multipliers for pipe/evnt/ee registers. >> >> We have a common function bam_addr() which computes addresses for all the >> registers. When computing address of top level/ee registers, we pass 0 to the >> pipe argument in addr() since they don't have any multiple instances. >> >> Some of the unused register definitions are removed. We can add new registers as >> we need them. > > Vinod, > > These changes replace the patch set I had that implemented support for the > v.1.3.0 register set. Andy, With your change "dmaengine: qcom_bam_dma: Add v1.3.0 driver support" and enabling qcom_bam_dma driver i was seeing some crashes in the kernel on IFC6410. But after reverting you change and applying these changes from Vinod I see IFC6410 booting fine. Here are the crash logs in case it helps and if your changes are still planned by you for upstream. http://paste.ubuntu.com/8471405/ Thanks Pramod > > -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
