Re: [RFC PATCH v3 0/5]

[Krzysztof Kozlowski <k.kozlowski@samsung.com>]

On 05.08.2015 17:16, Shawn Lin wrote:
> Synopsys DesignWare mobile storage host controller supports three
> types of transfer mode: pio, internal dma and external dma. However,
> dw_mmc can only supports pio and internal dma now. Thus some platforms
> using dw-mshc integrated with generic dma can't work in dma mode. So we
> submit this patch to achieve it.
> 
> And the config option, CONFIG_MMC_DW_IDMAC, was added by Will Newton
> (commit:f95f3850) for the first version of dw_mmc and never be touched from
> then. At that time dt-bindings hadn't been introduced into dw_mmc yet means
> we should select CONFIG_MMC_DW_IDMAC to enable internal dma mode at compile
> time. Nowadays, device-tree helps us to support a variety of boards with one
> kernel. That's why we need to remove it and decide the transfer mode at runtime.
> 
> This RFC patch needs lots of ACKs. I know it's hard, but it does need someone
> to make the running.
> 
> Patch does the following things:
> - remove CONFIG_MMC_DW_IDMAC config option
> - add bindings for idmac and edmac used by synopsys-dw-mshc
>   at runtime
> - add edmac support for synopsys-dw-mshc
> 
> Patch is based on next of git://git.linaro.org/people/ulf.hansson/mmc
> 
> 
> Changes in v3:
> - choose transfer mode at runtime
> - remove all CONFIG_MMC_DW_IDMAC config option
> - add supports-idmac property for some platforms
> 
> Changes in v2:
> - Fix typo of dev_info msg
> - remove unused dmach from declaration of dw_mci_dma_slave
> 
> Shawn Lin (5):
>   mmc: dw_mmc: Add external dma interface support
>   Documentation: synopsys-dw-mshc: add bindings for idmac and edmac
>   arm: configs: remove CONFIG_MMC_DW_IDMAC
>   mips: configs: remove CONFIG_MMC_DW_IDMAC
>   ARM: dts: add supports-idmac property

Please fix the title of cover letter.

You CC-ed a lot of people. Probably the whole output of git_maintainers
which is not necessary. This means that your patches did not reach some
of the mailing lists because of too many recipients. I received your
patchset but I can't find it on any of the lists I subscribe.

Please CC only REAL maintainers, not committers.

Additionally if DTS changes do not have to be introduced atomically
please split it per sub-architecture. Of course that applies only in
case of bisectable patches. And the patchset should preserve
bisectability and backward compatibility (mentioned earlier).

Best regards,
Krzysztof


> 
>  .../devicetree/bindings/mmc/synopsys-dw-mshc.txt   |  41 +++
>  arch/arc/configs/axs101_defconfig                  |   1 -
>  arch/arc/configs/axs103_defconfig                  |   1 -
>  arch/arc/configs/axs103_smp_defconfig              |   1 -
>  arch/arm/boot/dts/exynos3250-monk.dts              |   1 +
>  arch/arm/boot/dts/exynos3250-rinato.dts            |   1 +
>  arch/arm/boot/dts/exynos4412-odroid-common.dtsi    |   1 +
>  arch/arm/boot/dts/exynos4412-origen.dts            |   1 +
>  arch/arm/boot/dts/exynos4412-trats2.dts            |   1 +
>  arch/arm/boot/dts/exynos4x12.dtsi                  |   1 +
>  arch/arm/boot/dts/exynos5250-arndale.dts           |   2 +
>  arch/arm/boot/dts/exynos5250-smdk5250.dts          |   2 +
>  arch/arm/boot/dts/exynos5250-snow.dts              |   3 +
>  arch/arm/boot/dts/exynos5250-spring.dts            |   2 +
>  arch/arm/boot/dts/exynos5260-xyref5260.dts         |   2 +
>  arch/arm/boot/dts/exynos5410-smdk5410.dts          |   2 +
>  arch/arm/boot/dts/exynos5420-arndale-octa.dts      |   2 +
>  arch/arm/boot/dts/exynos5420-peach-pit.dts         |   3 +
>  arch/arm/boot/dts/exynos5420-smdk5420.dts          |   2 +
>  arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi |   2 +
>  arch/arm/boot/dts/exynos5800-peach-pi.dts          |   3 +
>  arch/arm/boot/dts/hisi-x5hd2.dtsi                  |   2 +
>  arch/arm/boot/dts/rk3288-evb.dtsi                  |   2 +
>  arch/arm/boot/dts/rk3288-firefly.dtsi              |   3 +
>  arch/arm/boot/dts/rk3288-popmetal.dts              |   2 +
>  arch/arm/configs/exynos_defconfig                  |   1 -
>  arch/arm/configs/hisi_defconfig                    |   1 -
>  arch/arm/configs/lpc18xx_defconfig                 |   1 -
>  arch/arm/configs/multi_v7_defconfig                |   1 -
>  arch/arm/configs/zx_defconfig                      |   1 -
>  arch/arm64/boot/dts/exynos/exynos7-espresso.dts    |   2 +
>  arch/mips/configs/pistachio_defconfig              |   1 -
>  drivers/mmc/host/Kconfig                           |  11 +-
>  drivers/mmc/host/dw_mmc-pltfm.c                    |   2 +
>  drivers/mmc/host/dw_mmc.c                          | 277 +++++++++++++++++----
>  include/linux/mmc/dw_mmc.h                         |  28 ++-
>  36 files changed, 338 insertions(+), 72 deletions(-)
>