[PATCH 3/4] drm: rcar-du: Add R8A774A1 support

[Kieran Bingham]

Hi Biju,

On 11/04/2019 15:34, Biju Das wrote:
> Add support for the R8A774A1 DU (which is very similar to the R8A7796 DU);
> it has one RGB output, one LVDS output and one HDMI output.
> 
> Signed-off-by: Biju Das <biju.das at bp.renesas.com>

I see Figure 35.1b across the two datasheets does show some differences
between these two parts, but the layout defined by the
rcar_du_r8a7796_info structure is compatible based on the current state
of the driver...

However, if support for the TCON/CMM is added to the DU driver - then I
think this will need to be separated.

I have seen patches this month which are trying to upstream a CMM
implementation.

With that in mind - perhaps it would be worth creating a new structure
for this part?

Otherwise the CMM would end up being enabled when it doesn't exist and
could cause problems.

--
Regards

Kieran


> ---
>  drivers/gpu/drm/rcar-du/rcar_du_drv.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> index 75ab17a..f7a5314 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -386,6 +386,7 @@ static const struct of_device_id rcar_du_of_table[] = {
>  	{ .compatible = "renesas,du-r8a7744", .data = &rzg1_du_r8a7743_info },
>  	{ .compatible = "renesas,du-r8a7745", .data = &rzg1_du_r8a7745_info },
>  	{ .compatible = "renesas,du-r8a77470", .data = &rzg1_du_r8a77470_info },
> +	{ .compatible = "renesas,du-r8a774a1", .data = &rcar_du_r8a7796_info },
>  	{ .compatible = "renesas,du-r8a774c0", .data = &rcar_du_r8a774c0_info },
>  	{ .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
>  	{ .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
>