mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
a1383655cf
Tested on bcm2710 (Raspberry Pi 3B). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
80 lines
2.3 KiB
Diff
80 lines
2.3 KiB
Diff
From fd539af952dfb820dc3d285a4f1311ee17bdbc79 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
Date: Wed, 31 Oct 2018 14:56:47 +0000
|
|
Subject: [PATCH] media: ov5647: Add support for non-continuous clock
|
|
mode
|
|
|
|
The driver was only supporting continuous clock mode
|
|
although this was not stated anywhere.
|
|
Non-continuous clock saves a small amount of power and
|
|
on some SoCs is easier to interface with.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
---
|
|
drivers/media/i2c/ov5647.c | 17 ++++++++++++++---
|
|
1 file changed, 14 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/media/i2c/ov5647.c
|
|
+++ b/drivers/media/i2c/ov5647.c
|
|
@@ -44,6 +44,7 @@
|
|
#define PWDN_ACTIVE_DELAY_MS 20
|
|
|
|
#define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5)
|
|
+#define MIPI_CTRL00_LINE_SYNC_ENABLE BIT(4)
|
|
#define MIPI_CTRL00_BUS_IDLE BIT(2)
|
|
#define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0)
|
|
|
|
@@ -95,6 +96,7 @@ struct ov5647 {
|
|
int power_count;
|
|
struct clk *xclk;
|
|
struct gpio_desc *pwdn;
|
|
+ unsigned int flags;
|
|
};
|
|
|
|
static inline struct ov5647 *to_state(struct v4l2_subdev *sd)
|
|
@@ -269,9 +271,15 @@ static int ov5647_set_virtual_channel(st
|
|
|
|
static int ov5647_stream_on(struct v4l2_subdev *sd)
|
|
{
|
|
+ struct ov5647 *ov5647 = to_state(sd);
|
|
+ u8 val = MIPI_CTRL00_BUS_IDLE;
|
|
int ret;
|
|
|
|
- ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_BUS_IDLE);
|
|
+ if (ov5647->flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK)
|
|
+ val |= MIPI_CTRL00_CLOCK_LANE_GATE |
|
|
+ MIPI_CTRL00_LINE_SYNC_ENABLE;
|
|
+
|
|
+ ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
@@ -568,7 +576,7 @@ static const struct v4l2_subdev_internal
|
|
.open = ov5647_open,
|
|
};
|
|
|
|
-static int ov5647_parse_dt(struct device_node *np)
|
|
+static int ov5647_parse_dt(struct device_node *np, struct ov5647 *sensor)
|
|
{
|
|
struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 };
|
|
struct device_node *ep;
|
|
@@ -581,6 +589,9 @@ static int ov5647_parse_dt(struct device
|
|
|
|
ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
|
|
|
|
+ if (!ret)
|
|
+ sensor->flags = bus_cfg.bus.mipi_csi2.flags;
|
|
+
|
|
of_node_put(ep);
|
|
return ret;
|
|
}
|
|
@@ -599,7 +610,7 @@ static int ov5647_probe(struct i2c_clien
|
|
return -ENOMEM;
|
|
|
|
if (IS_ENABLED(CONFIG_OF) && np) {
|
|
- ret = ov5647_parse_dt(np);
|
|
+ ret = ov5647_parse_dt(np, sensor);
|
|
if (ret) {
|
|
dev_err(dev, "DT parsing error: %d\n", ret);
|
|
return ret;
|