diff options
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.patch | 79 |
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; |