linux-kernel - Re: [PATCH v9 00/13] dmaengine: edma: add freescale edma v3 support

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Date:   Wed, 28 Jun 2023 10:45:07 -0400
From:   Frank Li <Frank.li@....com>
To:     vkoul@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        peng.fan@....com, joy.zou@....com, shenwei.wang@....com,
        imx@...ts.linux.dev
Subject: Re: [PATCH v9 00/13] dmaengine: edma: add freescale edma v3 support

On Tue, Jun 20, 2023 at 04:12:08PM -0400, Frank Li wrote:
> This patch series introduces support for the eDMA version 3 from
> Freescale. The eDMA v3 brings alterations in the register layout,
> particularly, the separation of channel control registers into
> different channels. The Transfer Control Descriptor (TCD) layout,
> however, remains identical with only the offset being changed.
> 
> The first 11 patches aim at tidying up the existing Freescale
> eDMA code and laying the groundwork for the integration of eDMA v3
> support.
> 
> Patch 1-11:
> These patches primarily focus on cleaning up and refactoring the existing
> fsl_edma driver code. This is to accommodate the upcoming changes and new
> features introduced with the eDMA v3.
> 
> Patch 12:
> This patch introduces support for eDMA v3. In addition, this patch has
> been designed with an eye towards future upgradability, specifically for
> transitioning to eDMA v5. The latter involves a significant upgrade
> where the TCD address would need to support 64 bits.
> 
> Patch 13:
> This patch focuses on the device tree bindings and their modifications
> to properly handle and integrate the changes brought about by eDMA v3

@vkoul:
  Do you have chance to check these patches? Any chance to come into 6.5
  All audio parts of i.MX8x and i.MX9 was dependent on these patches.

best regards
Frank Li

> 
> Change from v8 to v9
> - add dmaengine: fsl-edma: fix build error when arch is s390
>   fix kernel test robot build issue
> 
> Change from v7 to v8
> -dt-bind: add missed part
> 
> clock-names:
> > items:
> >   - const: dma
> > 
> > clocks:
> >   maxItems: 1
> 
> Change from v6 to v7
> -dt-bind: remove "else" branch. 
> 
> Change from v5 to v6
> - dt-bind: rework it by fixed top level constraint.
> 
> Change from v4 to v5
> - dt-bind, add example for imx93 to trigger make dt_binding_check to
> generate the yaml error. fixed dt_binding_check error. 
>   keep compatible string ordered alphabetically.
> 
> Change from v3 to v4.
> - use dma-channel-mask instead of fsl,channel-mask
> - don't use dmamux after v3. only use flags to distinguish the IP
> difference
> - fixed 8qm and imx93 have not CH_MUX register. Previous can work
> because dmamux is 0.
> 
> Change from v2 to v3
> - dt-binding: add interrupt-names
> - dt-binding: add minItems
> - dt-binding: add missed property: fsl,channel-mask
> - rework patch 4, removed edma_version to avoid confuse with hardware
> IP version.
> 
> Change from v1 to v2
> - fixed issue found by make DT_CHECKER_FLAGS=-m dt_binding_check
> - fixed warning found by kernel test robot
> 
> 
> Frank Li (13):
> 1   dmaengine: fsl-edma: fix build error when arch is s390
> 2   dmaengine: fsl-edma: clean up EXPORT_SYMBOL_GPL in fsl-edma-common.c
> 3   dmaengine: fsl-edma: clean up fsl_edma_irq_exit()
> 4   dmaengine: fsl-edma: transition from bool fields to bitmask flags in
>     drvdata
> 5   dmaengine: fsl-edma: Remove enum edma_version
> 6   dmaengine: fsl-edma: move common IRQ handler to common.c
> 7   dmaengine: fsl-edma: simply ATTR_DSIZE and ATTR_SSIZE by using ffs()
> 8   dmaengine: fsl-edma: refactor using devm_clk_get_enabled
> 9   dmaengine: fsl-edma: move clearing of register interrupt into
>     setup_irq function
> 10  dmaengine: fsl-edma: refactor chan_name setup and safety
> 11  dmaengine: fsl-edma: move tcd into struct fsl_dma_chan
> 12  dmaengine: fsl-edma: integrate v3 support
> 13  dt-bindings: fsl-dma: fsl-edma: add edma3 compatible string
> 
>  .../devicetree/bindings/dma/fsl,edma.yaml     | 106 +++++-
>  drivers/dma/Kconfig                           |   2 +-
>  drivers/dma/Makefile                          |   6 +-
>  drivers/dma/fsl-edma-common.c                 | 308 +++++++++++------
>  drivers/dma/fsl-edma-common.h                 | 127 +++++--
>  drivers/dma/{fsl-edma.c => fsl-edma-main.c}   | 320 ++++++++++++++----
>  drivers/dma/{mcf-edma.c => mcf-edma-main.c}   |  36 +-
>  7 files changed, 677 insertions(+), 228 deletions(-)
>  rename drivers/dma/{fsl-edma.c => fsl-edma-main.c} (62%)
>  rename drivers/dma/{mcf-edma.c => mcf-edma-main.c} (90%)
> 
> -- 
> 2.34.1
>