drm: rcar-du: Add r8a77990 and r8a77995 device support

Add support for the R-Car D3 (R8A77995) and E3 (R8A77990) SoCs to the
R-Car DU driver. The two SoCs instantiate compatible DUs, so a single
information structure is enough.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
[Add support for R8A77990]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

drivers/gpu/drm/rcar-du/rcar_du_drv.c

@@ -311,6 +311,34 @@ static const struct rcar_du_device_info rcar_du_r8a77970_info = {
 	.num_lvds = 1,
 };
 
+static const struct rcar_du_device_info rcar_du_r8a7799x_info = {
+	.gen = 3,
+	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_VSP1_SOURCE,
+	.channels_mask = BIT(1) | BIT(0),
+	.routes = {
+		/*
+		 * R8A77990 and R8A77995 have one RGB output and two LVDS
+		 * outputs.
+		 */
+		[RCAR_DU_OUTPUT_DPAD0] = {
+			.possible_crtcs = BIT(0) | BIT(1),
+			.port = 0,
+		},
+		[RCAR_DU_OUTPUT_LVDS0] = {
+			.possible_crtcs = BIT(0),
+			.port = 1,
+		},
+		[RCAR_DU_OUTPUT_LVDS1] = {
+			.possible_crtcs = BIT(1),
+			.port = 2,
+		},
+	},
+	.num_lvds = 2,
+	.lvds_clk_mask =  BIT(1) | BIT(0),
+};
+
 static const struct of_device_id rcar_du_of_table[] = {
 	{ .compatible = "renesas,du-r8a7743", .data = &rzg1_du_r8a7743_info },
 	{ .compatible = "renesas,du-r8a7745", .data = &rzg1_du_r8a7745_info },
@@ -324,6 +352,8 @@ static const struct of_device_id rcar_du_of_table[] = {
 	{ .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
 	{ .compatible = "renesas,du-r8a77965", .data = &rcar_du_r8a77965_info },
 	{ .compatible = "renesas,du-r8a77970", .data = &rcar_du_r8a77970_info },
+	{ .compatible = "renesas,du-r8a77990", .data = &rcar_du_r8a7799x_info },
+	{ .compatible = "renesas,du-r8a77995", .data = &rcar_du_r8a7799x_info },
 	{ }
 };