drm: rcar-du: Add r8a779g0 support

Add support for DU on r8a779g0, which is identical to DU on r8a779a0.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

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

@@ -524,6 +524,27 @@ static const struct rcar_du_device_info rcar_du_r8a779a0_info = {
 	.dsi_clk_mask =  BIT(1) | BIT(0),
 };
 
+static const struct rcar_du_device_info rcar_du_r8a779g0_info = {
+	.gen = 4,
+	.features = RCAR_DU_FEATURE_CRTC_IRQ
+		  | RCAR_DU_FEATURE_VSP1_SOURCE
+		  | RCAR_DU_FEATURE_NO_BLENDING,
+	.channels_mask = BIT(1) | BIT(0),
+	.routes = {
+		/* R8A779G0 has two MIPI DSI outputs. */
+		[RCAR_DU_OUTPUT_DSI0] = {
+			.possible_crtcs = BIT(0),
+			.port = 0,
+		},
+		[RCAR_DU_OUTPUT_DSI1] = {
+			.possible_crtcs = BIT(1),
+			.port = 1,
+		},
+	},
+	.num_rpf = 5,
+	.dsi_clk_mask =  BIT(1) | BIT(0),
+};
+
 static const struct of_device_id rcar_du_of_table[] = {
 	{ .compatible = "renesas,du-r8a7742", .data = &rcar_du_r8a7790_info },
 	{ .compatible = "renesas,du-r8a7743", .data = &rzg1_du_r8a7743_info },
@@ -549,6 +570,7 @@ static const struct of_device_id rcar_du_of_table[] = {
 	{ .compatible = "renesas,du-r8a77990", .data = &rcar_du_r8a7799x_info },
 	{ .compatible = "renesas,du-r8a77995", .data = &rcar_du_r8a7799x_info },
 	{ .compatible = "renesas,du-r8a779a0", .data = &rcar_du_r8a779a0_info },
+	{ .compatible = "renesas,du-r8a779g0", .data = &rcar_du_r8a779g0_info },
 	{ }
 };
 

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

@@ -107,7 +107,7 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group *rgrp)
 		 */
 		rcrtc = rcdu->crtcs;
 		num_crtcs = rcdu->num_crtcs;
-	} else if (rcdu->info->gen == 3 && rgrp->num_crtcs > 1) {
+	} else if (rcdu->info->gen >= 3 && rgrp->num_crtcs > 1) {
 		/*
 		 * On Gen3 dot clocks are setup through per-group registers,
 		 * only available when the group has two channels.