media: cedrus: Add support for R40

Video engine in R40 is very similar to that in A33 but it runs on lower
speed, at least according to OS images released by board designer.
Signed-off-by: NJernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/sunxi/cedrus/cedrus.c

@@ -508,6 +508,11 @@ static const struct cedrus_variant sun8i_h3_cedrus_variant = {
 	.mod_rate	= 402000000,
 };
 
+static const struct cedrus_variant sun8i_r40_cedrus_variant = {
+	.capabilities	= CEDRUS_CAPABILITY_UNTILED,
+	.mod_rate	= 297000000,
+};
+
 static const struct cedrus_variant sun50i_a64_cedrus_variant = {
 	.capabilities	= CEDRUS_CAPABILITY_UNTILED |
 			  CEDRUS_CAPABILITY_H265_DEC,
@@ -548,6 +553,10 @@ static const struct of_device_id cedrus_dt_match[] = {
 		.compatible = "allwinner,sun8i-h3-video-engine",
 		.data = &sun8i_h3_cedrus_variant,
 	},
+	{
+		.compatible = "allwinner,sun8i-r40-video-engine",
+		.data = &sun8i_r40_cedrus_variant,
+	},
 	{
 		.compatible = "allwinner,sun50i-a64-video-engine",
 		.data = &sun50i_a64_cedrus_variant,