Re: [PATCH v2, 2/2] soc: mediatek: mmsys: Use function call for setting the routing registers

[Hsin-Yi Wang]

On Wed, Dec 9, 2020 at 9:32 AM Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx> wrote:
>
> Actually, setting the registers for routing, use multiple 'if-else' for different
> routes, but this code would be more and more complicated while we
> support more and more SoCs. Change that and use a function call per SoC so the
> code will be more portable and clear.
>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> ---
>  drivers/soc/mediatek/mmsys/Makefile       |   3 +-
>  drivers/soc/mediatek/mmsys/mt2701-mmsys.c | 233 +++++++++++++++++++++++++++++
>  drivers/soc/mediatek/mmsys/mtk-mmsys.c    | 241 +++---------------------------
>  include/linux/soc/mediatek/mtk-mmsys.h    |  14 ++
>  4 files changed, 268 insertions(+), 223 deletions(-)
>  create mode 100644 drivers/soc/mediatek/mmsys/mt2701-mmsys.c
>
> diff --git a/drivers/soc/mediatek/mmsys/Makefile b/drivers/soc/mediatek/mmsys/Makefile
> index 5d976d7..ac03025 100644
> --- a/drivers/soc/mediatek/mmsys/Makefile
> +++ b/drivers/soc/mediatek/mmsys/Makefile
> @@ -1,2 +1,3 @@
>  # SPDX-License-Identifier: GPL-2.0-only
> -obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
> \ No newline at end of file
> +obj-$(CONFIG_MTK_MMSYS) += mt2701-mmsys.o
> +obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
> diff --git a/drivers/soc/mediatek/mmsys/mt2701-mmsys.c b/drivers/soc/mediatek/mmsys/mt2701-mmsys.c
> new file mode 100644
> index 0000000..40576d3
> --- /dev/null
> +++ b/drivers/soc/mediatek/mmsys/mt2701-mmsys.c
> @@ -0,0 +1,233 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2020 MediaTek Inc.
> + */
> +
> +#include <linux/device.h>
> +#include <linux/io.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-mmsys.h>
> +
> +#define DISP_REG_CONFIG_DISP_OVL0_MOUT_EN      0x040
> +#define DISP_REG_CONFIG_DISP_OVL1_MOUT_EN      0x044
> +#define DISP_REG_CONFIG_DISP_OD_MOUT_EN                0x048
> +#define DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN     0x04c
> +#define DISP_REG_CONFIG_DISP_UFOE_MOUT_EN      0x050
> +#define DISP_REG_CONFIG_DISP_COLOR0_SEL_IN     0x084
> +#define DISP_REG_CONFIG_DISP_COLOR1_SEL_IN     0x088
> +#define DISP_REG_CONFIG_DSIE_SEL_IN            0x0a4
> +#define DISP_REG_CONFIG_DSIO_SEL_IN            0x0a8
> +#define DISP_REG_CONFIG_DPI_SEL_IN             0x0ac
> +#define DISP_REG_CONFIG_DISP_RDMA2_SOUT                0x0b8
> +#define DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN     0x0c4
> +#define DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN     0x0c8
> +#define DISP_REG_CONFIG_MMSYS_CG_CON0          0x100
> +
> +#define DISP_REG_CONFIG_DISP_OVL_MOUT_EN       0x030
> +#define DISP_REG_CONFIG_OUT_SEL                        0x04c
> +#define DISP_REG_CONFIG_DSI_SEL                        0x050
> +#define DISP_REG_CONFIG_DPI_SEL                        0x064
> +
> +#define OVL0_MOUT_EN_COLOR0                    0x1
> +#define OD_MOUT_EN_RDMA0                       0x1
> +#define OD1_MOUT_EN_RDMA1                      BIT(16)
> +#define UFOE_MOUT_EN_DSI0                      0x1
> +#define COLOR0_SEL_IN_OVL0                     0x1
> +#define OVL1_MOUT_EN_COLOR1                    0x1
> +#define GAMMA_MOUT_EN_RDMA1                    0x1
> +#define RDMA0_SOUT_DPI0                                0x2
> +#define RDMA0_SOUT_DPI1                                0x3
> +#define RDMA0_SOUT_DSI1                                0x1
> +#define RDMA0_SOUT_DSI2                                0x4
> +#define RDMA0_SOUT_DSI3                                0x5
> +#define RDMA1_SOUT_DPI0                                0x2
> +#define RDMA1_SOUT_DPI1                                0x3
> +#define RDMA1_SOUT_DSI1                                0x1
> +#define RDMA1_SOUT_DSI2                                0x4
> +#define RDMA1_SOUT_DSI3                                0x5
> +#define RDMA2_SOUT_DPI0                                0x2
> +#define RDMA2_SOUT_DPI1                                0x3
> +#define RDMA2_SOUT_DSI1                                0x1
> +#define RDMA2_SOUT_DSI2                                0x4
> +#define RDMA2_SOUT_DSI3                                0x5
> +#define DPI0_SEL_IN_RDMA1                      0x1
> +#define DPI0_SEL_IN_RDMA2                      0x3
> +#define DPI1_SEL_IN_RDMA1                      (0x1 << 8)
> +#define DPI1_SEL_IN_RDMA2                      (0x3 << 8)
> +#define DSI0_SEL_IN_RDMA1                      0x1
> +#define DSI0_SEL_IN_RDMA2                      0x4
> +#define DSI1_SEL_IN_RDMA1                      0x1
> +#define DSI1_SEL_IN_RDMA2                      0x4
> +#define DSI2_SEL_IN_RDMA1                      (0x1 << 16)
> +#define DSI2_SEL_IN_RDMA2                      (0x4 << 16)
> +#define DSI3_SEL_IN_RDMA1                      (0x1 << 16)
> +#define DSI3_SEL_IN_RDMA2                      (0x4 << 16)
> +#define COLOR1_SEL_IN_OVL1                     0x1
> +
> +#define OVL_MOUT_EN_RDMA                       0x1
> +#define BLS_TO_DSI_RDMA1_TO_DPI1               0x8
> +#define BLS_TO_DPI_RDMA1_TO_DSI                        0x2
> +#define DSI_SEL_IN_BLS                         0x0
> +#define DPI_SEL_IN_BLS                         0x0
> +#define DSI_SEL_IN_RDMA                                0x1
> +
> +static unsigned int mtk_mmsys_ddp_mout_en(enum mtk_ddp_comp_id cur,
> +                                         enum mtk_ddp_comp_id next,
> +                                         unsigned int *addr)
> +{
> +       unsigned int value;
> +
> +       if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
> +               *addr = DISP_REG_CONFIG_DISP_OVL0_MOUT_EN;
> +               value = OVL0_MOUT_EN_COLOR0;
> +       } else if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_RDMA0) {
> +               *addr = DISP_REG_CONFIG_DISP_OVL_MOUT_EN;
> +               value = OVL_MOUT_EN_RDMA;
> +       } else if (cur == DDP_COMPONENT_OD0 && next == DDP_COMPONENT_RDMA0) {
> +               *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
> +               value = OD_MOUT_EN_RDMA0;
> +       } else if (cur == DDP_COMPONENT_UFOE && next == DDP_COMPONENT_DSI0) {
> +               *addr = DISP_REG_CONFIG_DISP_UFOE_MOUT_EN;
> +               value = UFOE_MOUT_EN_DSI0;
> +       } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
> +               *addr = DISP_REG_CONFIG_DISP_OVL1_MOUT_EN;
> +               value = OVL1_MOUT_EN_COLOR1;
> +       } else if (cur == DDP_COMPONENT_GAMMA && next == DDP_COMPONENT_RDMA1) {
> +               *addr = DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN;
> +               value = GAMMA_MOUT_EN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_OD1 && next == DDP_COMPONENT_RDMA1) {
> +               *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
> +               value = OD1_MOUT_EN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DPI0) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> +               value = RDMA0_SOUT_DPI0;
> +       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DPI1) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> +               value = RDMA0_SOUT_DPI1;
> +       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI1) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> +               value = RDMA0_SOUT_DSI1;
> +       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI2) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> +               value = RDMA0_SOUT_DSI2;
> +       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI3) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> +               value = RDMA0_SOUT_DSI3;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI1) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> +               value = RDMA1_SOUT_DSI1;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI2) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> +               value = RDMA1_SOUT_DSI2;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI3) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> +               value = RDMA1_SOUT_DSI3;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> +               value = RDMA1_SOUT_DPI0;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI1) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> +               value = RDMA1_SOUT_DPI1;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI0) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> +               value = RDMA2_SOUT_DPI0;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI1) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> +               value = RDMA2_SOUT_DPI1;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI1) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> +               value = RDMA2_SOUT_DSI1;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI2) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> +               value = RDMA2_SOUT_DSI2;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI3) {
> +               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> +               value = RDMA2_SOUT_DSI3;
> +       } else {
> +               value = 0;
> +       }
> +
> +       return value;
> +}
> +
> +static unsigned int mtk_mmsys_ddp_sel_in(enum mtk_ddp_comp_id cur,
> +                                        enum mtk_ddp_comp_id next,
> +                                        unsigned int *addr)
> +{
> +       unsigned int value;
> +
> +       if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
> +               *addr = DISP_REG_CONFIG_DISP_COLOR0_SEL_IN;
> +               value = COLOR0_SEL_IN_OVL0;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
> +               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> +               value = DPI0_SEL_IN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI1) {
> +               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> +               value = DPI1_SEL_IN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI0) {
> +               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> +               value = DSI0_SEL_IN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI1) {
> +               *addr = DISP_REG_CONFIG_DSIO_SEL_IN;
> +               value = DSI1_SEL_IN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI2) {
> +               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> +               value = DSI2_SEL_IN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI3) {
> +               *addr = DISP_REG_CONFIG_DSIO_SEL_IN;
> +               value = DSI3_SEL_IN_RDMA1;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI0) {
> +               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> +               value = DPI0_SEL_IN_RDMA2;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI1) {
> +               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> +               value = DPI1_SEL_IN_RDMA2;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI0) {
> +               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> +               value = DSI0_SEL_IN_RDMA2;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI1) {
> +               *addr = DISP_REG_CONFIG_DSIO_SEL_IN;
> +               value = DSI1_SEL_IN_RDMA2;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI2) {
> +               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> +               value = DSI2_SEL_IN_RDMA2;
> +       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI3) {
> +               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> +               value = DSI3_SEL_IN_RDMA2;
> +       } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
> +               *addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
> +               value = COLOR1_SEL_IN_OVL1;
> +       } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
> +               *addr = DISP_REG_CONFIG_DSI_SEL;
> +               value = DSI_SEL_IN_BLS;
> +       } else {
> +               value = 0;
> +       }
> +
> +       return value;
> +}
> +
> +static void mtk_mmsys_ddp_sout_sel(void __iomem *config_regs,
> +                                  enum mtk_ddp_comp_id cur,
> +                                  enum mtk_ddp_comp_id next)
> +{
> +       if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
> +               writel_relaxed(BLS_TO_DSI_RDMA1_TO_DPI1,
> +                              config_regs + DISP_REG_CONFIG_OUT_SEL);
> +       } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DPI0) {
> +               writel_relaxed(BLS_TO_DPI_RDMA1_TO_DSI,
> +                              config_regs + DISP_REG_CONFIG_OUT_SEL);
> +               writel_relaxed(DSI_SEL_IN_RDMA,
> +                              config_regs + DISP_REG_CONFIG_DSI_SEL);
> +               writel_relaxed(DPI_SEL_IN_BLS,
> +                              config_regs + DISP_REG_CONFIG_DPI_SEL);
> +       }
> +}
> +
> +struct mtk_mmsys_conn_funcs mt2701_mmsys_funcs = {
> +       .mout_en = mtk_mmsys_ddp_mout_en,
> +       .sel_in = mtk_mmsys_ddp_sel_in,
> +       .sout_sel = mtk_mmsys_ddp_sout_sel,
> +};
> diff --git a/drivers/soc/mediatek/mmsys/mtk-mmsys.c b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> index da2de8f..9d6a3e9 100644
> --- a/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> +++ b/drivers/soc/mediatek/mmsys/mtk-mmsys.c
> @@ -10,91 +10,34 @@
>  #include <linux/platform_device.h>
>  #include <linux/soc/mediatek/mtk-mmsys.h>
>
> -#define DISP_REG_CONFIG_DISP_OVL0_MOUT_EN      0x040
> -#define DISP_REG_CONFIG_DISP_OVL1_MOUT_EN      0x044
> -#define DISP_REG_CONFIG_DISP_OD_MOUT_EN                0x048
> -#define DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN     0x04c
> -#define DISP_REG_CONFIG_DISP_UFOE_MOUT_EN      0x050
> -#define DISP_REG_CONFIG_DISP_COLOR0_SEL_IN     0x084
> -#define DISP_REG_CONFIG_DISP_COLOR1_SEL_IN     0x088
> -#define DISP_REG_CONFIG_DSIE_SEL_IN            0x0a4
> -#define DISP_REG_CONFIG_DSIO_SEL_IN            0x0a8
> -#define DISP_REG_CONFIG_DPI_SEL_IN             0x0ac
> -#define DISP_REG_CONFIG_DISP_RDMA2_SOUT                0x0b8
> -#define DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN     0x0c4
> -#define DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN     0x0c8
> -#define DISP_REG_CONFIG_MMSYS_CG_CON0          0x100
> -
> -#define DISP_REG_CONFIG_DISP_OVL_MOUT_EN       0x030
> -#define DISP_REG_CONFIG_OUT_SEL                        0x04c
> -#define DISP_REG_CONFIG_DSI_SEL                        0x050
> -#define DISP_REG_CONFIG_DPI_SEL                        0x064
> -
> -#define OVL0_MOUT_EN_COLOR0                    0x1
> -#define OD_MOUT_EN_RDMA0                       0x1
> -#define OD1_MOUT_EN_RDMA1                      BIT(16)
> -#define UFOE_MOUT_EN_DSI0                      0x1
> -#define COLOR0_SEL_IN_OVL0                     0x1
> -#define OVL1_MOUT_EN_COLOR1                    0x1
> -#define GAMMA_MOUT_EN_RDMA1                    0x1
> -#define RDMA0_SOUT_DPI0                                0x2
> -#define RDMA0_SOUT_DPI1                                0x3
> -#define RDMA0_SOUT_DSI1                                0x1
> -#define RDMA0_SOUT_DSI2                                0x4
> -#define RDMA0_SOUT_DSI3                                0x5
> -#define RDMA1_SOUT_DPI0                                0x2
> -#define RDMA1_SOUT_DPI1                                0x3
> -#define RDMA1_SOUT_DSI1                                0x1
> -#define RDMA1_SOUT_DSI2                                0x4
> -#define RDMA1_SOUT_DSI3                                0x5
> -#define RDMA2_SOUT_DPI0                                0x2
> -#define RDMA2_SOUT_DPI1                                0x3
> -#define RDMA2_SOUT_DSI1                                0x1
> -#define RDMA2_SOUT_DSI2                                0x4
> -#define RDMA2_SOUT_DSI3                                0x5
> -#define DPI0_SEL_IN_RDMA1                      0x1
> -#define DPI0_SEL_IN_RDMA2                      0x3
> -#define DPI1_SEL_IN_RDMA1                      (0x1 << 8)
> -#define DPI1_SEL_IN_RDMA2                      (0x3 << 8)
> -#define DSI0_SEL_IN_RDMA1                      0x1
> -#define DSI0_SEL_IN_RDMA2                      0x4
> -#define DSI1_SEL_IN_RDMA1                      0x1
> -#define DSI1_SEL_IN_RDMA2                      0x4
> -#define DSI2_SEL_IN_RDMA1                      (0x1 << 16)
> -#define DSI2_SEL_IN_RDMA2                      (0x4 << 16)
> -#define DSI3_SEL_IN_RDMA1                      (0x1 << 16)
> -#define DSI3_SEL_IN_RDMA2                      (0x4 << 16)
> -#define COLOR1_SEL_IN_OVL1                     0x1
> -
> -#define OVL_MOUT_EN_RDMA                       0x1
> -#define BLS_TO_DSI_RDMA1_TO_DPI1               0x8
> -#define BLS_TO_DPI_RDMA1_TO_DSI                        0x2
> -#define DSI_SEL_IN_BLS                         0x0
> -#define DPI_SEL_IN_BLS                         0x0
> -#define DSI_SEL_IN_RDMA                                0x1
> -
>  struct mtk_mmsys_driver_data {
>         const char *clk_driver;
> +       const struct mtk_mmsys_conn_funcs *funcs;
>  };
>
>  static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
>         .clk_driver = "clk-mt2701-mm",
> +       .funcs = &mt2701_mmsys_funcs,
>  };
>
>  static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
>         .clk_driver = "clk-mt2712-mm",
> +       .funcs = &mt2701_mmsys_funcs,
>  };
>
>  static const struct mtk_mmsys_driver_data mt6779_mmsys_driver_data = {
>         .clk_driver = "clk-mt6779-mm",
> +       .funcs = &mt2701_mmsys_funcs,
>  };
>
>  static const struct mtk_mmsys_driver_data mt6797_mmsys_driver_data = {
>         .clk_driver = "clk-mt6797-mm",
> +       .funcs = &mt2701_mmsys_funcs,
>  };
>
>  static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
>         .clk_driver = "clk-mt8173-mm",
> +       .funcs = &mt2701_mmsys_funcs,
>  };
>
>  static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
> @@ -106,176 +49,26 @@ struct mtk_mmsys {
>         const struct mtk_mmsys_driver_data *data;
>  };
>
> -static unsigned int mtk_mmsys_ddp_mout_en(enum mtk_ddp_comp_id cur,
> -                                         enum mtk_ddp_comp_id next,
> -                                         unsigned int *addr)
> -{
> -       unsigned int value;
> -
> -       if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
> -               *addr = DISP_REG_CONFIG_DISP_OVL0_MOUT_EN;
> -               value = OVL0_MOUT_EN_COLOR0;
> -       } else if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_RDMA0) {
> -               *addr = DISP_REG_CONFIG_DISP_OVL_MOUT_EN;
> -               value = OVL_MOUT_EN_RDMA;
> -       } else if (cur == DDP_COMPONENT_OD0 && next == DDP_COMPONENT_RDMA0) {
> -               *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
> -               value = OD_MOUT_EN_RDMA0;
> -       } else if (cur == DDP_COMPONENT_UFOE && next == DDP_COMPONENT_DSI0) {
> -               *addr = DISP_REG_CONFIG_DISP_UFOE_MOUT_EN;
> -               value = UFOE_MOUT_EN_DSI0;
> -       } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
> -               *addr = DISP_REG_CONFIG_DISP_OVL1_MOUT_EN;
> -               value = OVL1_MOUT_EN_COLOR1;
> -       } else if (cur == DDP_COMPONENT_GAMMA && next == DDP_COMPONENT_RDMA1) {
> -               *addr = DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN;
> -               value = GAMMA_MOUT_EN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_OD1 && next == DDP_COMPONENT_RDMA1) {
> -               *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
> -               value = OD1_MOUT_EN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DPI0) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> -               value = RDMA0_SOUT_DPI0;
> -       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DPI1) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> -               value = RDMA0_SOUT_DPI1;
> -       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI1) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> -               value = RDMA0_SOUT_DSI1;
> -       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI2) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> -               value = RDMA0_SOUT_DSI2;
> -       } else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI3) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA0_SOUT_EN;
> -               value = RDMA0_SOUT_DSI3;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI1) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> -               value = RDMA1_SOUT_DSI1;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI2) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> -               value = RDMA1_SOUT_DSI2;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI3) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> -               value = RDMA1_SOUT_DSI3;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> -               value = RDMA1_SOUT_DPI0;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI1) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA1_SOUT_EN;
> -               value = RDMA1_SOUT_DPI1;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI0) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> -               value = RDMA2_SOUT_DPI0;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI1) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> -               value = RDMA2_SOUT_DPI1;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI1) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> -               value = RDMA2_SOUT_DSI1;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI2) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> -               value = RDMA2_SOUT_DSI2;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI3) {
> -               *addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> -               value = RDMA2_SOUT_DSI3;
> -       } else {
> -               value = 0;
> -       }
> -
> -       return value;
> -}
> -
> -static unsigned int mtk_mmsys_ddp_sel_in(enum mtk_ddp_comp_id cur,
> -                                        enum mtk_ddp_comp_id next,
> -                                        unsigned int *addr)
> -{
> -       unsigned int value;
> -
> -       if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
> -               *addr = DISP_REG_CONFIG_DISP_COLOR0_SEL_IN;
> -               value = COLOR0_SEL_IN_OVL0;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
> -               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> -               value = DPI0_SEL_IN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI1) {
> -               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> -               value = DPI1_SEL_IN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI0) {
> -               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> -               value = DSI0_SEL_IN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI1) {
> -               *addr = DISP_REG_CONFIG_DSIO_SEL_IN;
> -               value = DSI1_SEL_IN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI2) {
> -               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> -               value = DSI2_SEL_IN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DSI3) {
> -               *addr = DISP_REG_CONFIG_DSIO_SEL_IN;
> -               value = DSI3_SEL_IN_RDMA1;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI0) {
> -               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> -               value = DPI0_SEL_IN_RDMA2;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI1) {
> -               *addr = DISP_REG_CONFIG_DPI_SEL_IN;
> -               value = DPI1_SEL_IN_RDMA2;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI0) {
> -               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> -               value = DSI0_SEL_IN_RDMA2;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI1) {
> -               *addr = DISP_REG_CONFIG_DSIO_SEL_IN;
> -               value = DSI1_SEL_IN_RDMA2;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI2) {
> -               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> -               value = DSI2_SEL_IN_RDMA2;
> -       } else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DSI3) {
> -               *addr = DISP_REG_CONFIG_DSIE_SEL_IN;
> -               value = DSI3_SEL_IN_RDMA2;
> -       } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
> -               *addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
> -               value = COLOR1_SEL_IN_OVL1;
> -       } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
> -               *addr = DISP_REG_CONFIG_DSI_SEL;
> -               value = DSI_SEL_IN_BLS;
> -       } else {
> -               value = 0;
> -       }
> -
> -       return value;
> -}
> -
> -static void mtk_mmsys_ddp_sout_sel(void __iomem *config_regs,
> -                                  enum mtk_ddp_comp_id cur,
> -                                  enum mtk_ddp_comp_id next)
> -{
> -       if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
> -               writel_relaxed(BLS_TO_DSI_RDMA1_TO_DPI1,
> -                              config_regs + DISP_REG_CONFIG_OUT_SEL);
> -       } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DPI0) {
> -               writel_relaxed(BLS_TO_DPI_RDMA1_TO_DSI,
> -                              config_regs + DISP_REG_CONFIG_OUT_SEL);
> -               writel_relaxed(DSI_SEL_IN_RDMA,
> -                              config_regs + DISP_REG_CONFIG_DSI_SEL);
> -               writel_relaxed(DPI_SEL_IN_BLS,
> -                              config_regs + DISP_REG_CONFIG_DPI_SEL);
> -       }
> -}
> -
>  void mtk_mmsys_ddp_connect(struct device *dev,
>                            enum mtk_ddp_comp_id cur,
>                            enum mtk_ddp_comp_id next)
>  {
>         struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
>         unsigned int addr, value, reg;
> +       struct mtk_mmsys_conn_funcs *funcs = mmsys->data->funcs;

Compiling error here: initializing 'struct mtk_mmsys_conn_funcs *'
with an expression of type 'const struct mtk_mmsys_conn_funcs *const'
discards qualifiers
[-Werror,-Wincompatible-pointer-types-discards-qualifiers]
        struct mtk_mmsys_conn_funcs *funcs = mmsys->data->funcs;

const struct mtk_mmsys_conn_funcs *funcs = mmsys->data->funcs;

>
> -       value = mtk_mmsys_ddp_mout_en(cur, next, &addr);
> +       if (!funcs)
> +               return;
> +
> +       value = funcs->mout_en(cur, next, &addr);
>         if (value) {
>                 reg = readl_relaxed(mmsys->regs + addr) | value;
>                 writel_relaxed(reg, mmsys->regs + addr);
>         }
>
> -       mtk_mmsys_ddp_sout_sel(mmsys->regs, cur, next);
> +       funcs->sout_sel(mmsys->regs, cur, next);
>
> -       value = mtk_mmsys_ddp_sel_in(cur, next, &addr);
> +       value = funcs->sel_in(cur, next, &addr);
>         if (value) {
>                 reg = readl_relaxed(mmsys->regs + addr) | value;
>                 writel_relaxed(reg, mmsys->regs + addr);
> @@ -289,14 +82,18 @@ void mtk_mmsys_ddp_disconnect(struct device *dev,
>  {
>         struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
>         unsigned int addr, value, reg;
> +       struct mtk_mmsys_conn_funcs *funcs = mmsys->data->funcs;
> +
> +       if (!funcs)
> +               return;
>
> -       value = mtk_mmsys_ddp_mout_en(cur, next, &addr);
> +       value = funcs->mout_en(cur, next, &addr);
>         if (value) {
>                 reg = readl_relaxed(mmsys->regs + addr) & ~value;
>                 writel_relaxed(reg, mmsys->regs + addr);
>         }
>
> -       value = mtk_mmsys_ddp_sel_in(cur, next, &addr);
> +       value = funcs->sel_in(cur, next, &addr);
>         if (value) {
>                 reg = readl_relaxed(mmsys->regs + addr) & ~value;
>                 writel_relaxed(reg, mmsys->regs + addr);
> diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
> index 2228bf6..17e8b91 100644
> --- a/include/linux/soc/mediatek/mtk-mmsys.h
> +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> @@ -42,6 +42,20 @@ enum mtk_ddp_comp_id {
>         DDP_COMPONENT_ID_MAX,
>  };
>
> +struct mtk_mmsys_conn_funcs {
> +       u32 (*mout_en)(enum mtk_ddp_comp_id cur,
> +                      enum mtk_ddp_comp_id next,
> +                      unsigned int *addr);
> +       u32 (*sel_in)(enum mtk_ddp_comp_id cur,
> +                     enum mtk_ddp_comp_id next,
> +                     unsigned int *addr);
> +       void (*sout_sel)(void __iomem *config_regs,
> +                        enum mtk_ddp_comp_id cur,
> +                        enum mtk_ddp_comp_id next);
> +};
> +
> +extern struct mtk_mmsys_conn_funcs mt2701_mmsys_funcs;
> +
>  void mtk_mmsys_ddp_connect(struct device *dev,
>                            enum mtk_ddp_comp_id cur,
>                            enum mtk_ddp_comp_id next);