[libcamera-devel] [PATCH 07/25] media: ov5647: Fix style issues
Jacopo Mondi
jacopo at jmondi.org
Tue Jun 23 12:07:57 CEST 2020
The driver has some obvious style issues which are worth fixing before
expanding the driver capabilities.
Fix:
- Variable declaration order
- Function parameters alignment
- Multi-line comments and spurious line breaks
- Use lowercase for hexadecimal values
Cosmetic change, no functional changes intended.
Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
drivers/media/i2c/ov5647.c | 101 +++++++++++++++++--------------------
1 file changed, 45 insertions(+), 56 deletions(-)
diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c
index c92856d3aa81c..e9679382623f9 100644
--- a/drivers/media/i2c/ov5647.c
+++ b/drivers/media/i2c/ov5647.c
@@ -34,8 +34,6 @@
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-mediabus.h>
-#define SENSOR_NAME "ov5647"
-
/*
* From the datasheet, "20ms after PWDN goes low or 20ms after RESETB goes
* high if reset is inserted after PWDN goes high, host can access sensor's
@@ -50,9 +48,9 @@
#define OV5647_SW_STANDBY 0x0100
#define OV5647_SW_RESET 0x0103
-#define OV5647_REG_CHIPID_H 0x300A
-#define OV5647_REG_CHIPID_L 0x300B
-#define OV5640_REG_PAD_OUT 0x300D
+#define OV5647_REG_CHIPID_H 0x300a
+#define OV5647_REG_CHIPID_L 0x300b
+#define OV5640_REG_PAD_OUT 0x300d
#define OV5647_REG_FRAME_OFF_NUMBER 0x4202
#define OV5647_REG_MIPI_CTRL00 0x4800
#define OV5647_REG_MIPI_CTRL14 0x4814
@@ -158,7 +156,7 @@ static struct regval_list ov5647_640x480[] = {
{0x3808, 0x02},
{0x3809, 0x80},
{0x380a, 0x01},
- {0x380b, 0xE0},
+ {0x380b, 0xe0},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
@@ -209,9 +207,9 @@ static struct regval_list ov5647_640x480[] = {
static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
{
- int ret;
unsigned char data[3] = { reg >> 8, reg & 0xff, val};
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret;
ret = i2c_master_send(client, data, 3);
if (ret < 0)
@@ -223,9 +221,9 @@ static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
{
- int ret;
unsigned char data_w[2] = { reg >> 8, reg & 0xff };
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret;
ret = i2c_master_send(client, data_w, 2);
if (ret < 0) {
@@ -243,7 +241,7 @@ static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
}
static int ov5647_write_array(struct v4l2_subdev *sd,
- struct regval_list *regs, int array_size)
+ struct regval_list *regs, int array_size)
{
int i, ret;
@@ -266,6 +264,7 @@ static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
return ret;
channel_id &= ~(3 << 6);
+
return ov5647_write(sd, OV5647_REG_MIPI_CTRL14, channel_id | (channel << 6));
}
@@ -294,8 +293,8 @@ static int ov5647_stream_off(struct v4l2_subdev *sd)
{
int ret;
- ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_CLOCK_LANE_GATE
- | MIPI_CTRL00_BUS_IDLE | MIPI_CTRL00_CLOCK_LANE_DISABLE);
+ ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_CLOCK_LANE_GATE |
+ MIPI_CTRL00_BUS_IDLE | MIPI_CTRL00_CLOCK_LANE_DISABLE);
if (ret < 0)
return ret;
@@ -325,16 +324,16 @@ static int set_sw_standby(struct v4l2_subdev *sd, bool standby)
static int __sensor_init(struct v4l2_subdev *sd)
{
- int ret;
- u8 resetval, rdval;
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 resetval, rdval;
+ int ret;
ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval);
if (ret < 0)
return ret;
ret = ov5647_write_array(sd, ov5647_640x480,
- ARRAY_SIZE(ov5647_640x480));
+ ARRAY_SIZE(ov5647_640x480));
if (ret < 0) {
dev_err(&client->dev, "write sensor default regs error\n");
return ret;
@@ -355,17 +354,15 @@ static int __sensor_init(struct v4l2_subdev *sd)
return ret;
}
- /*
- * stream off to make the clock lane into LP-11 state.
- */
+ /* Stream off to make the clock lane into LP-11 state. */
return ov5647_stream_off(sd);
}
static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
{
- int ret = 0;
- struct ov5647 *ov5647 = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov5647 *ov5647 = to_state(sd);
+ int ret = 0;
mutex_lock(&ov5647->lock);
@@ -384,7 +381,7 @@ static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
}
ret = ov5647_write_array(sd, sensor_oe_enable_regs,
- ARRAY_SIZE(sensor_oe_enable_regs));
+ ARRAY_SIZE(sensor_oe_enable_regs));
if (ret < 0) {
clk_disable_unprepare(ov5647->xclk);
dev_err(&client->dev,
@@ -403,18 +400,15 @@ static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
dev_dbg(&client->dev, "OV5647 power off\n");
ret = ov5647_write_array(sd, sensor_oe_disable_regs,
- ARRAY_SIZE(sensor_oe_disable_regs));
-
+ ARRAY_SIZE(sensor_oe_disable_regs));
if (ret < 0)
dev_dbg(&client->dev, "disable oe failed\n");
ret = set_sw_standby(sd, true);
-
if (ret < 0)
dev_dbg(&client->dev, "soft stby failed\n");
clk_disable_unprepare(ov5647->xclk);
-
gpiod_set_value_cansleep(ov5647->pwdn, 1);
}
@@ -430,10 +424,10 @@ static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
- struct v4l2_dbg_register *reg)
+ struct v4l2_dbg_register *reg)
{
- u8 val;
int ret;
+ u8 val;
ret = ov5647_read(sd, reg->reg & 0xff, &val);
if (ret < 0)
@@ -446,15 +440,13 @@ static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
}
static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
- const struct v4l2_dbg_register *reg)
+ const struct v4l2_dbg_register *reg)
{
return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
}
#endif
-/*
- * Subdev core operations registration
- */
+/* Subdev core operations registration */
static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
.s_power = ov5647_sensor_power,
#ifdef CONFIG_VIDEO_ADV_DEBUG
@@ -476,8 +468,8 @@ static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
};
static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_mbus_code_enum *code)
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index > 0)
return -EINVAL;
@@ -493,7 +485,7 @@ static int ov5647_set_get_fmt(struct v4l2_subdev *sd,
{
struct v4l2_mbus_framefmt *fmt = &format->format;
- /* Only one format is supported, so return that */
+ /* Only one format is supported, so return that. */
memset(fmt, 0, sizeof(*fmt));
fmt->code = MEDIA_BUS_FMT_SBGGR8_1X8;
fmt->colorspace = V4L2_COLORSPACE_SRGB;
@@ -518,9 +510,9 @@ static const struct v4l2_subdev_ops ov5647_subdev_ops = {
static int ov5647_detect(struct v4l2_subdev *sd)
{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 read;
int ret;
- struct i2c_client *client = v4l2_get_subdevdata(sd);
ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
if (ret < 0)
@@ -549,10 +541,8 @@ static int ov5647_detect(struct v4l2_subdev *sd)
static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
- struct v4l2_mbus_framefmt *format =
- v4l2_subdev_get_try_format(sd, fh->pad, 0);
- struct v4l2_rect *crop =
- v4l2_subdev_get_try_crop(sd, fh->pad, 0);
+ struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(sd, fh->pad, 0);
+ struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, fh->pad, 0);
crop->left = OV5647_COLUMN_START_DEF;
crop->top = OV5647_ROW_START_DEF;
@@ -578,7 +568,6 @@ static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
struct device_node *ep;
-
int ret;
ep = of_graph_get_next_endpoint(np, NULL);
@@ -594,17 +583,18 @@ static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
out:
of_node_put(ep);
+
return ret;
}
static int ov5647_probe(struct i2c_client *client)
{
+ struct device_node *np = client->dev.of_node;
struct device *dev = &client->dev;
struct ov5647 *sensor;
- int ret;
struct v4l2_subdev *sd;
- struct device_node *np = client->dev.of_node;
u32 xclk_freq;
+ int ret;
sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
if (!sensor)
@@ -618,7 +608,6 @@ static int ov5647_probe(struct i2c_client *client)
}
}
- /* get system clock (xclk) */
sensor->xclk = devm_clk_get(dev, NULL);
if (IS_ERR(sensor->xclk)) {
dev_err(dev, "could not get xclk");
@@ -631,22 +620,21 @@ static int ov5647_probe(struct i2c_client *client)
return -EINVAL;
}
- /* Request the power down GPIO asserted */
- sensor->pwdn = devm_gpiod_get_optional(&client->dev, "pwdn",
- GPIOD_OUT_HIGH);
+ /* Request the power down GPIO asserted. */
+ sensor->pwdn = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_HIGH);
mutex_init(&sensor->lock);
sd = &sensor->sd;
v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
- sensor->sd.internal_ops = &ov5647_subdev_internal_ops;
- sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sd->internal_ops = &ov5647_subdev_internal_ops;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
if (ret < 0)
- goto mutex_remove;
+ goto mutex_destroy;
if (sensor->pwdn) {
gpiod_set_value_cansleep(sensor->pwdn, 0);
@@ -654,22 +642,23 @@ static int ov5647_probe(struct i2c_client *client)
}
ret = ov5647_detect(sd);
-
gpiod_set_value_cansleep(sensor->pwdn, 1);
-
if (ret < 0)
- goto error;
+ goto entity_cleanup;
ret = v4l2_async_register_subdev(sd);
if (ret < 0)
- goto error;
+ goto entity_cleanup;
dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
+
return 0;
-error:
+
+entity_cleanup:
media_entity_cleanup(&sd->entity);
-mutex_remove:
+mutex_destroy:
mutex_destroy(&sensor->lock);
+
return ret;
}
@@ -688,7 +677,7 @@ static int ov5647_remove(struct i2c_client *client)
static const struct i2c_device_id ov5647_id[] = {
{ "ov5647", 0 },
- { }
+ { /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, ov5647_id);
@@ -703,7 +692,7 @@ MODULE_DEVICE_TABLE(of, ov5647_of_match);
static struct i2c_driver ov5647_driver = {
.driver = {
.of_match_table = of_match_ptr(ov5647_of_match),
- .name = SENSOR_NAME,
+ .name = "ov5647",
},
.probe_new = ov5647_probe,
.remove = ov5647_remove,
--
2.27.0
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