Re: [PATCH v8 10/19] drm/mediatek: dpi: move swap_shift to board config

[Chun-Kuang Hu]

Hi, Guillaume:

Guillaume Ranquet <granquet@xxxxxxxxxxxx> 於 2022年2月18日 週五 下午10:56寫道：
>
> Add flexibility by moving the swap shift value to board config
>
> Signed-off-by: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/mediatek/mtk_dpi.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 0d3acd08ea358..ec221e24e0fee 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -131,6 +131,7 @@ struct mtk_dpi_conf {
>         u32 dimension_mask;
>         // Mask used for HSIZE and VSIZE (no shift)
>         u32 hvsize_mask;
> +       u32 channel_swap_shift;
>         const struct mtk_dpi_yc_limit *limit;
>  };
>
> @@ -349,7 +350,8 @@ static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
>                 break;
>         }
>
> -       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK);
> +       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP,
> +                    CH_SWAP_MASK << dpi->conf->channel_swap_shift);

This may be wrong because of these definition:

#define DPINTF_CH_SWAP BIT(1)
#define DPINTF_CH_SWAP_MASK (0x7 << 1)

Regards,
Chun-Kuang.

>  }
>
>  static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
> @@ -821,6 +823,7 @@ static const struct mtk_dpi_conf mt8173_conf = {
>         .swap_input_support = true,
>         .dimension_mask = HPW_MASK,
>         .hvsize_mask = HSIZE_MASK,
> +       .channel_swap_shift = CH_SWAP,
>         .limit = &mtk_dpi_limit,
>  };
>
> @@ -835,6 +838,7 @@ static const struct mtk_dpi_conf mt2701_conf = {
>         .swap_input_support = true,
>         .dimension_mask = HPW_MASK,
>         .hvsize_mask = HSIZE_MASK,
> +       .channel_swap_shift = CH_SWAP,
>         .limit = &mtk_dpi_limit,
>  };
>
> @@ -848,6 +852,7 @@ static const struct mtk_dpi_conf mt8183_conf = {
>         .swap_input_support = true,
>         .dimension_mask = HPW_MASK,
>         .hvsize_mask = HSIZE_MASK,
> +       .channel_swap_shift = CH_SWAP,
>         .limit = &mtk_dpi_limit,
>  };
>
> @@ -861,6 +866,7 @@ static const struct mtk_dpi_conf mt8192_conf = {
>         .swap_input_support = true,
>         .dimension_mask = HPW_MASK,
>         .hvsize_mask = HSIZE_MASK,
> +       .channel_swap_shift = CH_SWAP,
>         .limit = &mtk_dpi_limit,
>  };
>
> --
> 2.34.1
>