From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
[ Upstream commit 59a95979638664a905cd46845e7cac1b3ff942f7 ]
On R-Car M2-W:
rcar_fdp1 fe940000.fdp1: FDP1 Unidentifiable (0x02010101)
rcar_fdp1 fe944000.fdp1: FDP1 Unidentifiable (0x02010101)
Although the IP Internal Data Register on R-Car Gen2 is documented to
contain all zeros, the actual register contents seem to match the FDP1
version ID of R-Car H3 ES1.*, which has just been removed.
Fortunately this version is not used for any other purposes yet.
Fix this by re-adding the ID, now using an R-Car Gen2-specific name.
Fixes: af4273b43f2b ("media: renesas: fdp1: remove R-Car H3 ES1.* handling")
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Reviewed-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/media/platform/renesas/rcar_fdp1.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/media/platform/renesas/rcar_fdp1.c b/drivers/media/platform/renesas/rcar_fdp1.c
index f43e458590b8c..ab39cd2201c85 100644
--- a/drivers/media/platform/renesas/rcar_fdp1.c
+++ b/drivers/media/platform/renesas/rcar_fdp1.c
@@ -254,6 +254,8 @@ MODULE_PARM_DESC(debug, "activate debug info");
/* Internal Data (HW Version) */
#define FD1_IP_INTDATA 0x0800
+/* R-Car Gen2 HW manual says zero, but actual value matches R-Car H3 ES1.x */
+#define FD1_IP_GEN2 0x02010101
#define FD1_IP_M3W 0x02010202
#define FD1_IP_H3 0x02010203
#define FD1_IP_M3N 0x02010204
@@ -2360,6 +2362,9 @@ static int fdp1_probe(struct platform_device *pdev)
hw_version = fdp1_read(fdp1, FD1_IP_INTDATA);
switch (hw_version) {
+ case FD1_IP_GEN2:
+ dprintk(fdp1, "FDP1 Version R-Car Gen2\n");
+ break;
case FD1_IP_M3W:
dprintk(fdp1, "FDP1 Version R-Car M3-W\n");
break;
--
2.39.2
