On 2015/8/6 7:45, Krzysztof Kozlowski wrote:

On 05.08.2015 17:16, Shawn Lin wrote:

quoted

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.

Right, not the whole output of "cc" by patchman automatically should be 
involved
in the  iteration of this patch. I will omit them from this loop  in v4.

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).

okay, it will be split for each sub-architecture.
Thanks, Krzysztof. It's helpful.

Best regards,
Krzysztof

quoted

  .../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(-)

-- 
Shawn Lin