Re: [RFC PATCH v4 0/9]

Jaehoon Chung
2015-08-06T07:08:25Z

Hi, Shawn.

I remembered that Krzysztof has mentioned "Fix the title of cover letter."
Your cover letter's title is nothing.. "[RFC PATCH v4 0/9] " ??
[RFC PATCH v4 0/9] your title...

Best Regards,
Jaehoon Chung

On 08/06/2015 03:44 PM, Shawn Lin wrote:
> Add external dma support for Synopsys MSHC
>
> 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 since
> 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 by reading
> dw_mmc's HCON reg 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 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 v4:
> - remove "host->trans_mode" and use "host->use_dma" to indicate
> transfer mode.
> - remove all bt-bindings' changes since we don't need new properities.
> - check transfer mode at runtime by reading HCON reg
> - spilt defconfig changes for each sub-architecture
> - fix the title of cover letter
> - reuse some code for reducing code size
>
> 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 (9):
> mmc: dw_mmc: Add external dma interface support
> Documentation: synopsys-dw-mshc: add bindings for idmac and edmac
> mips: pistachio_defconfig: remove CONFIG_MMC_DW_IDMAC
> arc: axs10x_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: exynos_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: hisi_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: lpc18xx_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: multi_v7_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: zx_defconfig: remove CONFIG_MMC_DW_IDMAC
>
> .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 25 ++
> arch/arc/configs/axs101_defconfig | 1 -
> arch/arc/configs/axs103_defconfig | 1 -
> arch/arc/configs/axs103_smp_defconfig | 1 -
> 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/mips/configs/pistachio_defconfig | 1 -
> drivers/mmc/host/Kconfig | 11 +-
> drivers/mmc/host/dw_mmc-pltfm.c | 2 +
> drivers/mmc/host/dw_mmc.c | 258 +++++++++++++++++----
> include/linux/mmc/dw_mmc.h | 27 ++-
> 14 files changed, 257 insertions(+), 75 deletions(-)
>