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Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch')
-rw-r--r--target/linux/bcm27xx/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch79
1 files changed, 79 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch b/target/linux/bcm27xx/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch
new file mode 100644
index 0000000000..edbc12081d
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch
@@ -0,0 +1,79 @@
+From 79bbd278272416aa61c29bda88e79f8f6dd35903 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;
+ 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;
+ }
+@@ -600,7 +611,7 @@ 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;