brcm2708: update to latest patches from RPi Foundation

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch b/target/linux/brcm2708/patches-4.19/950-0168-media-ov5647-Add-support-for-non-continuous-clock-mo.patch
new file mode 100644 (file)
index 0000000..edbc120
--- /dev/null
+++ b/target/linux/brcm2708/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;