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(-) >
