media: rzg2l-cru: csi2: Introduce SoC-specific D-PHY handling

In preparation for adding support for the RZ/V2H(P) SoC, where the D-PHY
differs from the existing RZ/G2L implementation, introduce a new
rzg2l_csi2_info structure. This structure provides function pointers for
SoC-specific D-PHY enable and disable operations.

Modify rzg2l_csi2_dphy_setting() to use these function pointers instead of
calling rzg2l_csi2_dphy_enable() and rzg2l_csi2_dphy_disable() directly.
Update the device match table to store the appropriate function pointers
for each compatible SoC.

This change prepares the driver for future extensions without affecting
the current functionality for RZ/G2L.

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://lore.kernel.org/r/20250411170624.472257-9-tommaso.merciai.xr@bp.renesas.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
index 4ccf7c5ea58b0192020b4428e95abf787f3b7eb9..4aa5d58dde5bdae498e987a3c78590fe9fe3a306 100644 (file)
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
@@ -107,6 +107,7 @@ struct rzg2l_csi2 {
        void __iomem *base;
        struct reset_control *presetn;
        struct reset_control *cmn_rstb;
+       const struct rzg2l_csi2_info *info;
        struct clk *sysclk;
        struct clk *vclk;
        unsigned long vclk_rate;
@@ -123,6 +124,11 @@ struct rzg2l_csi2 {
        bool dphy_enabled;
 };
 
+struct rzg2l_csi2_info {
+       int (*dphy_enable)(struct rzg2l_csi2 *csi2);
+       int (*dphy_disable)(struct rzg2l_csi2 *csi2);
+};
+
 struct rzg2l_csi2_timings {
        u32 t_init;
        u32 tclk_miss;
@@ -355,14 +361,19 @@ static int rzg2l_csi2_dphy_enable(struct rzg2l_csi2 *csi2)
        return ret;
 }
 
+static const struct rzg2l_csi2_info rzg2l_csi2_info = {
+       .dphy_enable = rzg2l_csi2_dphy_enable,
+       .dphy_disable = rzg2l_csi2_dphy_disable,
+};
+
 static int rzg2l_csi2_dphy_setting(struct v4l2_subdev *sd, bool on)
 {
        struct rzg2l_csi2 *csi2 = sd_to_csi2(sd);
 
        if (on)
-               return rzg2l_csi2_dphy_enable(csi2);
+               return csi2->info->dphy_enable(csi2);
 
-       return rzg2l_csi2_dphy_disable(csi2);
+       return csi2->info->dphy_disable(csi2);
 }
 
 static int rzg2l_csi2_mipi_link_enable(struct rzg2l_csi2 *csi2)
@@ -772,6 +783,10 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
        if (!csi2)
                return -ENOMEM;
 
+       csi2->info = of_device_get_match_data(dev);
+       if (!csi2->info)
+               return dev_err_probe(dev, -EINVAL, "Failed to get OF match data\n");
+
        csi2->base = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(csi2->base))
                return PTR_ERR(csi2->base);
@@ -891,7 +906,10 @@ static const struct dev_pm_ops rzg2l_csi2_pm_ops = {
 };
 
 static const struct of_device_id rzg2l_csi2_of_table[] = {
-       { .compatible = "renesas,rzg2l-csi2", },
+       {
+               .compatible = "renesas,rzg2l-csi2",
+               .data = &rzg2l_csi2_info,
+       },
        { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, rzg2l_csi2_of_table);