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    Subject[PATCH v4 0/4] Genericize DW MIPI DSI bridge and add i.MX 6 driver
    Date
    Having a generic Synopsis DesignWare MIPI-DSI host controller bridge
    driver is a very good idea, however the current implementation has
    hardcoded quite a lot of the register layouts used by the two supported
    SoC vendors, STM and Rockchip, which use IP cores v1.30 and v1.31.

    This makes it hard to support other SoC vendors like the FSL/NXP i.MX 6
    which use older v1.01 cores or future versions because, based on history,
    layout changes should also be expected in new DSI versions / SoCs.

    This patch series converts the bridge and platform drivers to access
    registers via generic regmap APIs and allows each platform driver to
    configure its register layout via struct reg_fields, then adds support
    for the host controller found on i.MX 6.

    I only have i.MX hardware with MIPI-DSI panel and relevant documentation
    available for testing so I'll really appreciate it if someone could test
    the series on Rockchip and STM... eyeballing register fields could only
    get me so far, so sorry in advance for any breakage!

    Many thanks to Boris Brezillon <boris.brezillon@collabora.com> for
    suggesting the regmap solution and to Liu Ying <Ying.Liu@freescale.com>
    for doing the initial i.MX platform driver implementation.

    This series applies on top of latest linux-next tree, next-20191202.

    v3 -> v4:
    * Added commmit message to dt-binding patch (Neil)
    * Converted the dt-binding to yaml dt-schema format (Neil)
    * Small DT node + driver fixes (Rob)
    * Renamed platform driver to reflect it's only for i.MX v6 (Fabio)
    * Added small panel example to the host controller DT binding

    v2 -> v3:
    * Added const declarations to dw-mipi-dsi.c structs (Emil)
    * Fixed Reviewed-by tags and cc'd some more relevant ML (Emil)

    v1 -> v2:
    * Moved register definitions & regmap initialization into bridge
    module. Platform drivers get the regmap via plat_data after calling
    the bridge probe (Emil).

    Adrian Ratiu (4):
    drm: bridge: dw_mipi_dsi: access registers via a regmap
    drm: bridge: dw_mipi_dsi: abstract register access using reg_fields
    drm: imx: Add i.MX 6 MIPI DSI host driver
    dt-bindings: display: add i.MX6 MIPI DSI host controller doc

    .../display/imx/fsl,mipi-dsi-imx6.yaml | 136 ++++
    drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 699 +++++++++++++-----
    drivers/gpu/drm/imx/Kconfig | 7 +
    drivers/gpu/drm/imx/Makefile | 1 +
    drivers/gpu/drm/imx/dw_mipi_dsi-imx6.c | 378 ++++++++++
    .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 17 +-
    drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 34 +-
    include/drm/bridge/dw_mipi_dsi.h | 2 +-
    8 files changed, 1067 insertions(+), 207 deletions(-)
    create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml
    create mode 100644 drivers/gpu/drm/imx/dw_mipi_dsi-imx6.c

    --
    2.24.0

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