[PATCH 11/11] media: exynos4-is: Correct parallel port probing

From: Jonathan Bakker
Date: Sat Apr 25 2020 - 22:27:56 EST


According to the binding doc[1], port A should be reg = 0
and port B reg = 1. Unfortunately, the driver was treating 0
as invalid and 1 as camera port A. Match the binding doc and
make 0=A and 1=B.

[1] Documentation/devicetree/bindings/media/samsung-fimc.txt

Signed-off-by: Jonathan Bakker <xc-racer2@xxxxxxx>
---
drivers/media/platform/exynos4-is/media-dev.c | 18 +++++++++++++-----
drivers/media/platform/exynos4-is/media-dev.h | 1 +
include/media/drv-intf/exynos-fimc.h | 2 +-
3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c
index a87ebd7913be..9c4fdf726b92 100644
--- a/drivers/media/platform/exynos4-is/media-dev.c
+++ b/drivers/media/platform/exynos4-is/media-dev.c
@@ -418,13 +418,21 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd,
return ret;
}

- if (WARN_ON(endpoint.base.port == 0) || *index >= FIMC_MAX_SENSORS) {
- of_node_put(ep);
- return -EINVAL;
+ if (fimc_input_is_parallel(endpoint.base.port)) {
+ if (WARN_ON(*index >= FIMC_MAX_PARALLEL)) {
+ of_node_put(ep);
+ return -EINVAL;
+ }
+ pd->mux_id = endpoint.base.port;
+ } else {
+ if (WARN_ON(endpoint.base.port == 0 ||
+ *index >= FIMC_MAX_SENSORS)) {
+ of_node_put(ep);
+ return -EINVAL;
+ }
+ pd->mux_id = (endpoint.base.port - 1) & 0x1;
}

- pd->mux_id = (endpoint.base.port - 1) & 0x1;
-
rem = of_graph_get_remote_port_parent(ep);
of_node_put(ep);
if (rem == NULL) {
diff --git a/drivers/media/platform/exynos4-is/media-dev.h b/drivers/media/platform/exynos4-is/media-dev.h
index 4b8f9ac52ebc..7bd93fd11b33 100644
--- a/drivers/media/platform/exynos4-is/media-dev.h
+++ b/drivers/media/platform/exynos4-is/media-dev.h
@@ -29,6 +29,7 @@

#define PINCTRL_STATE_IDLE "idle"

+#define FIMC_MAX_PARALLEL 2
#define FIMC_MAX_SENSORS 4
#define FIMC_MAX_CAMCLKS 2
#define DEFAULT_SENSOR_CLK_FREQ 24000000U
diff --git a/include/media/drv-intf/exynos-fimc.h b/include/media/drv-intf/exynos-fimc.h
index 6b9ef631d6bb..5a07576c378b 100644
--- a/include/media/drv-intf/exynos-fimc.h
+++ b/include/media/drv-intf/exynos-fimc.h
@@ -44,7 +44,7 @@ enum fimc_bus_type {
FIMC_BUS_TYPE_ISP_WRITEBACK = FIMC_BUS_TYPE_LCD_WRITEBACK_B,
};

-#define fimc_input_is_parallel(x) ((x) == 1 || (x) == 2)
+#define fimc_input_is_parallel(x) ((x) == 0 || (x) == 1)
#define fimc_input_is_mipi_csi(x) ((x) == 3 || (x) == 4)

/*
--
2.20.1