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80 lines
2.3 KiB
Diff
80 lines
2.3 KiB
Diff
From 79bbd278272416aa61c29bda88e79f8f6dd35903 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Wed, 31 Oct 2018 14:56:47 +0000
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Subject: [PATCH] media: ov5647: Add support for non-continuous clock
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mode
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The driver was only supporting continuous clock mode
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although this was not stated anywhere.
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Non-continuous clock saves a small amount of power and
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on some SoCs is easier to interface with.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/media/i2c/ov5647.c | 17 ++++++++++++++---
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1 file changed, 14 insertions(+), 3 deletions(-)
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--- a/drivers/media/i2c/ov5647.c
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+++ b/drivers/media/i2c/ov5647.c
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@@ -44,6 +44,7 @@
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#define PWDN_ACTIVE_DELAY_MS 20
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#define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5)
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+#define MIPI_CTRL00_LINE_SYNC_ENABLE BIT(4)
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#define MIPI_CTRL00_BUS_IDLE BIT(2)
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#define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0)
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@@ -95,6 +96,7 @@ struct ov5647 {
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int power_count;
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struct clk *xclk;
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struct gpio_desc *pwdn;
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+ unsigned int flags;
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};
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static inline struct ov5647 *to_state(struct v4l2_subdev *sd)
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@@ -269,9 +271,15 @@ static int ov5647_set_virtual_channel(st
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static int ov5647_stream_on(struct v4l2_subdev *sd)
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{
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+ struct ov5647 *ov5647 = to_state(sd);
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+ u8 val = MIPI_CTRL00_BUS_IDLE;
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int ret;
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- ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_BUS_IDLE);
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+ if (ov5647->flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK)
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+ val |= MIPI_CTRL00_CLOCK_LANE_GATE |
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+ MIPI_CTRL00_LINE_SYNC_ENABLE;
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+
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+ ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
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if (ret < 0)
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return ret;
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@@ -568,7 +576,7 @@ static const struct v4l2_subdev_internal
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.open = ov5647_open,
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};
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-static int ov5647_parse_dt(struct device_node *np)
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+static int ov5647_parse_dt(struct device_node *np, struct ov5647 *sensor)
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{
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struct v4l2_fwnode_endpoint bus_cfg;
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struct device_node *ep;
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@@ -581,6 +589,9 @@ static int ov5647_parse_dt(struct device
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ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
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+ if (!ret)
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+ sensor->flags = bus_cfg.bus.mipi_csi2.flags;
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+
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of_node_put(ep);
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return ret;
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}
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@@ -600,7 +611,7 @@ static int ov5647_probe(struct i2c_clien
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return -ENOMEM;
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if (IS_ENABLED(CONFIG_OF) && np) {
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- ret = ov5647_parse_dt(np);
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+ ret = ov5647_parse_dt(np, sensor);
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if (ret) {
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dev_err(dev, "DT parsing error: %d\n", ret);
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return ret;
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