gpu/drm: ingenic: Add support for the JZ4770

The LCD controller in the JZ4770 supports up to 720p. While there has
been many new features added since the old JZ4740, which are not yet
handled here, this driver still works fine.

v2: No change
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20191210144142.33143-6-paul@crapouillou.net
# *** extracted tags ***
Acked-by: Sam Ravnborg <sam@ravnborg.org>

drivers/gpu/drm/ingenic/ingenic-drm.c

@@ -831,9 +831,16 @@ static const struct jz_soc_info jz4725b_soc_info = {
 	.max_height = 600,
 };
 
+static const struct jz_soc_info jz4770_soc_info = {
+	.needs_dev_clk = false,
+	.max_width = 1280,
+	.max_height = 720,
+};
+
 static const struct of_device_id ingenic_drm_of_match[] = {
 	{ .compatible = "ingenic,jz4740-lcd", .data = &jz4740_soc_info },
 	{ .compatible = "ingenic,jz4725b-lcd", .data = &jz4725b_soc_info },
+	{ .compatible = "ingenic,jz4770-lcd", .data = &jz4770_soc_info },
 	{ /* sentinel */ },
 };