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SubjectRe: [PATCH v2 02/13] drm/mediatek: move hardware register to node data
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Hi, Bibby:

One inline comment.

On Wed, 2018-09-05 at 16:31 +0800, Bibby Hsieh wrote:
> From: chunhui dai <chunhui.dai@mediatek.com>
>
> The address of register DPI_H_FRE_CON is different in different IC.
> Using of_node data to find this address.
>
> Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 29 +++++++++++++++++++++++------
> drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 1 -
> 2 files changed, 23 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index d9373e67d328..3db959fed493 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -72,6 +72,7 @@ struct mtk_dpi {
> struct clk *tvd_clk;
> int irq;
> struct drm_display_mode mode;
> + const struct mtk_dpi_conf *conf;
> enum mtk_dpi_out_color_format color_format;
> enum mtk_dpi_out_yc_map yc_map;
> enum mtk_dpi_out_bit_num bit_num;
> @@ -117,6 +118,10 @@ struct mtk_dpi_yc_limit {
> u16 c_bottom;
> };
>
> +struct mtk_dpi_conf {
> + const u32 reg_h_fre_con;
> +};
> +
> static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
> {
> u32 tmp = readl(dpi->regs + offset) & ~mask;
> @@ -342,7 +347,7 @@ 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_H_FRE_CON, H_FRE_2N, H_FRE_2N);
> + mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
> }
>
> static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> @@ -668,6 +673,18 @@ static const struct component_ops mtk_dpi_component_ops = {
> .unbind = mtk_dpi_unbind,
> };
>
> +static const struct mtk_dpi_conf mt8173_conf = {
> + .reg_h_fre_con = 0xe0,
> +};
> +
> +static const struct of_device_id mtk_dpi_of_ids[] = {
> + { .compatible = "mediatek,mt8173-dpi",
> + .data = &mt8173_conf,
> + },
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
> +
> static int mtk_dpi_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -675,13 +692,18 @@ static int mtk_dpi_probe(struct platform_device *pdev)
> struct resource *mem;
> struct device_node *bridge_node;
> int comp_id;
> + const struct of_device_id *match;
> int ret;
>
> + match = of_match_node(mtk_dpi_of_ids, dev->of_node);
> + if (!match)
> + return -ENODEV;

One more blank line.

Regards,
CK

> dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
> if (!dpi)
> return -ENOMEM;
>
> dpi->dev = dev;
> + dpi->conf = (struct mtk_dpi_conf *)match->data;
>
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> dpi->regs = devm_ioremap_resource(dev, mem);
> @@ -760,11 +782,6 @@ static int mtk_dpi_remove(struct platform_device *pdev)
> return 0;
> }
>
> -static const struct of_device_id mtk_dpi_of_ids[] = {
> - { .compatible = "mediatek,mt8173-dpi", },
> - {}
> -};
> -
> struct platform_driver mtk_dpi_driver = {
> .probe = mtk_dpi_probe,
> .remove = mtk_dpi_remove,
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> index 4b6ad4751a31..040444d7718d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> @@ -223,6 +223,5 @@
> #define ESAV_CODE2 (0xFFF << 0)
> #define ESAV_CODE3_MSB BIT(16)
>
> -#define DPI_H_FRE_CON 0xE0
> #define H_FRE_2N BIT(25)
> #endif /* __MTK_DPI_REGS_H */


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