[PATCH v7 05/43] drm/mediatek: mtk_dpi: Add checks for reg_h_fre_con existence

[Chun-Kuang Hu]

Hi, Angelo:

AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com> 於
2025年2月17日 週一 下午11:49寫道：
>
> In preparation for adding support for newer DPI instances which
> do support direct-pin but do not have any H_FRE_CON register,
> like the one found in MT8195 and MT8188, add a branch to check
> if the reg_h_fre_con variable was declared in the mtk_dpi_conf
> structure for the probed SoC DPI version.
>
> As a note, this is useful specifically only for cases in which
> the support_direct_pin variable is true, so mt8195-dpintf is
> not affected by any issue.

Applied to mediatek-drm-next [1], thanks.

[1] https://web.git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next

Regards,
Chun-Kuang.

>
> Reviewed-by: CK Hu <ck.hu at mediatek.com>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dpi.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 59c2e4f32a61..bb1a17f1384b 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -431,12 +431,13 @@ static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
>
>  static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
>  {
> -       mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
> +       if (dpi->conf->reg_h_fre_con)
> +               mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
>  }
>
>  static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
>  {
> -       if (dpi->conf->edge_sel_en)
> +       if (dpi->conf->edge_sel_en && dpi->conf->reg_h_fre_con)
>                 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
>  }
>
> --
> 2.48.1
>