Hi Geert,
Quoting Geert Uytterhoeven (2023-04-26 11:18:24)
> On R-Car M2-W:
>
> rcar_fdp1 fe940000.fdp1: FDP1 Unidentifiable (0x02010101)
> rcar_fdp1 fe944000.fdp1: FDP1 Unidentifiable (0x02010101)
>
> Although the IP Internal Data Register on R-Car Gen2 is documented to
> contain all zeros, the actual register contents seem to match the FDP1
> version ID of R-Car H3 ES1.*, which has just been removed.
> Fortunately this version is not used for any other purposes yet.
>
> Fix this by re-adding the ID, now using an R-Car Gen2-specific name.
>
> Fixes: af4273b43f2bd9ee ("media: renesas: fdp1: remove R-Car H3 ES1.* handling")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> ---
> Version register contents verified on R-Car H2 ES1.0, R-Car M2-W ES1.0 &
> ES3.0, and R-Car E2 ES1.0. I couldn't get hold of an R-Car M2-N.
>
> v2:
> - Add Reviewed-by,
> - Add comment.
Looks good!. A pain that the hardware doesn't match the documentation
but ... ho hum!
Reviewed-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/platform/renesas/rcar_fdp1.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/media/platform/renesas/rcar_fdp1.c b/drivers/media/platform/renesas/rcar_fdp1.c
> index 99af68fddc9249f5..d3bb3e71d61fd9dc 100644
> --- a/drivers/media/platform/renesas/rcar_fdp1.c
> +++ b/drivers/media/platform/renesas/rcar_fdp1.c
> @@ -254,6 +254,8 @@ MODULE_PARM_DESC(debug, "activate debug info");
>
> /* Internal Data (HW Version) */
> #define FD1_IP_INTDATA 0x0800
> +/* R-Car Gen2 HW manual says zero, but actual value matches R-Car H3 ES1.x */
> +#define FD1_IP_GEN2 0x02010101
> #define FD1_IP_M3W 0x02010202
> #define FD1_IP_H3 0x02010203
> #define FD1_IP_M3N 0x02010204
> @@ -2360,6 +2362,9 @@ static int fdp1_probe(struct platform_device *pdev)
>
> hw_version = fdp1_read(fdp1, FD1_IP_INTDATA);
> switch (hw_version) {
> + case FD1_IP_GEN2:
> + dprintk(fdp1, "FDP1 Version R-Car Gen2\n");
> + break;
> case FD1_IP_M3W:
> dprintk(fdp1, "FDP1 Version R-Car M3-W\n");
> break;
> --
> 2.34.1
>
