[PATCH v3 2/3] media: i2c: og0ve1b: Introduce per-sensor data structure
From: Wenmeng Liu
Date: Wed Jul 08 2026 - 10:40:09 EST
Refactor the driver to separate sensor-specific data from the common
driver code. Introduce a sensor_data structure, populated through
i2c_get_match_data(), to hold the chip ID, MCLK frequency, link
frequencies and supported modes.
Test pattern programming is described by a per-sensor callback, and each
mode stores its media bus format code (rather than a bits-per-pixel
value) so that sensors with a different output format can be supported.
Signed-off-by: Wenmeng Liu <wenmeng.liu@xxxxxxxxxxxxxxxx>
---
drivers/media/i2c/og0ve1b.c | 99 ++++++++++++++++++++++++++++++++-------------
1 file changed, 71 insertions(+), 28 deletions(-)
diff --git a/drivers/media/i2c/og0ve1b.c b/drivers/media/i2c/og0ve1b.c
index 84a28cdcade10f8fbcf945999e88f84641b9bc0d..041342fbe3c822400388f58a03e6057e186f060f 100644
--- a/drivers/media/i2c/og0ve1b.c
+++ b/drivers/media/i2c/og0ve1b.c
@@ -65,11 +65,23 @@ struct og0ve1b_mode {
u32 height; /* Frame height in pixels */
u32 hts; /* Horizontal timing size */
u32 vts; /* Default vertical timing size */
- u32 bpp; /* Bits per pixel */
+ u32 code; /* MEDIA_BUS_FMT code */
const struct og0ve1b_reg_list reg_list; /* Sensor register setting */
};
+struct og0ve1b;
+
+struct og0ve1b_sensor_data {
+ u64 chip_id;
+ unsigned long mclk_freq;
+ int (*enable_test_pattern)(struct og0ve1b *og0ve1b, u32 pattern);
+ const s64 *link_freq_menu;
+ int num_link_freqs;
+ const struct og0ve1b_mode *modes;
+ int num_modes;
+};
+
static const char * const og0ve1b_test_pattern_menu[] = {
"Disabled",
"Vertical Colour Bars",
@@ -99,6 +111,8 @@ struct og0ve1b {
/* Saved register value */
u64 pre_isp;
+
+ const struct og0ve1b_sensor_data *data;
};
static const struct cci_reg_sequence og0ve1b_640x480_120fps_mode[] = {
@@ -247,13 +261,13 @@ static const struct cci_reg_sequence og0ve1b_640x480_120fps_mode[] = {
{ CCI_REG8(0x3f47), 0x35 },
};
-static const struct og0ve1b_mode supported_modes[] = {
+static const struct og0ve1b_mode og0ve1b_supported_modes[] = {
{
.width = 640,
.height = 480,
.hts = 792,
.vts = 568,
- .bpp = 8,
+ .code = MEDIA_BUS_FMT_Y8_1X8,
.reg_list = {
.regs = og0ve1b_640x480_120fps_mode,
.num_regs = ARRAY_SIZE(og0ve1b_640x480_120fps_mode),
@@ -273,11 +287,21 @@ static int og0ve1b_enable_test_pattern(struct og0ve1b *og0ve1b, u32 pattern)
return cci_write(og0ve1b->regmap, OG0VE1B_REG_PRE_ISP, val, NULL);
}
+static const struct og0ve1b_sensor_data og0ve1b_data = {
+ .chip_id = OG0VE1B_CHIP_ID,
+ .mclk_freq = OG0VE1B_MCLK_FREQ_24MHZ,
+ .enable_test_pattern = og0ve1b_enable_test_pattern,
+ .link_freq_menu = og0ve1b_link_freq_menu,
+ .num_link_freqs = ARRAY_SIZE(og0ve1b_link_freq_menu),
+ .modes = og0ve1b_supported_modes,
+ .num_modes = ARRAY_SIZE(og0ve1b_supported_modes),
+};
+
static int og0ve1b_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct og0ve1b *og0ve1b = container_of(ctrl->handler, struct og0ve1b,
ctrl_handler);
- const struct og0ve1b_mode *mode = &supported_modes[0];
+ const struct og0ve1b_mode *mode = &og0ve1b->data->modes[0];
s64 exposure_max;
int ret;
@@ -314,7 +338,7 @@ static int og0ve1b_set_ctrl(struct v4l2_ctrl *ctrl)
ctrl->val + mode->height, NULL);
break;
case V4L2_CID_TEST_PATTERN:
- ret = og0ve1b_enable_test_pattern(og0ve1b, ctrl->val);
+ ret = og0ve1b->data->enable_test_pattern(og0ve1b, ctrl->val);
break;
default:
ret = -EINVAL;
@@ -330,10 +354,19 @@ static const struct v4l2_ctrl_ops og0ve1b_ctrl_ops = {
.s_ctrl = og0ve1b_set_ctrl,
};
+static s64 og0ve1b_pixel_rate(const struct og0ve1b_sensor_data *data)
+{
+ const struct og0ve1b_mode *mode = &data->modes[0];
+ unsigned int bpp = mode->code == MEDIA_BUS_FMT_Y8_1X8 ? 8 : 10;
+
+ return data->link_freq_menu[0] / bpp;
+}
+
static int og0ve1b_init_controls(struct og0ve1b *og0ve1b)
{
struct v4l2_ctrl_handler *ctrl_hdlr = &og0ve1b->ctrl_handler;
- const struct og0ve1b_mode *mode = &supported_modes[0];
+ const struct og0ve1b_mode *mode = &og0ve1b->data->modes[0];
+ const struct og0ve1b_sensor_data *data = og0ve1b->data;
s64 exposure_max, pixel_rate, h_blank, v_blank;
struct v4l2_fwnode_device_properties props;
struct v4l2_ctrl *ctrl;
@@ -343,12 +376,12 @@ static int og0ve1b_init_controls(struct og0ve1b *og0ve1b)
ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, &og0ve1b_ctrl_ops,
V4L2_CID_LINK_FREQ,
- ARRAY_SIZE(og0ve1b_link_freq_menu) - 1,
- 0, og0ve1b_link_freq_menu);
+ data->num_link_freqs - 1,
+ 0, data->link_freq_menu);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
- pixel_rate = og0ve1b_link_freq_menu[0] / mode->bpp;
+ pixel_rate = og0ve1b_pixel_rate(data);
v4l2_ctrl_new_std(ctrl_hdlr, &og0ve1b_ctrl_ops, V4L2_CID_PIXEL_RATE,
0, pixel_rate, 1, pixel_rate);
@@ -407,7 +440,7 @@ static int og0ve1b_init_controls(struct og0ve1b *og0ve1b)
static void og0ve1b_update_pad_format(const struct og0ve1b_mode *mode,
struct v4l2_mbus_framefmt *fmt)
{
- fmt->code = MEDIA_BUS_FMT_Y8_1X8;
+ fmt->code = mode->code;
fmt->width = mode->width;
fmt->height = mode->height;
fmt->field = V4L2_FIELD_NONE;
@@ -421,8 +454,8 @@ static int og0ve1b_enable_streams(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state, u32 pad,
u64 streams_mask)
{
- const struct og0ve1b_reg_list *reg_list = &supported_modes[0].reg_list;
struct og0ve1b *og0ve1b = to_og0ve1b(sd);
+ const struct og0ve1b_reg_list *reg_list = &og0ve1b->data->modes[0].reg_list;
int ret;
ret = pm_runtime_resume_and_get(og0ve1b->dev);
@@ -484,13 +517,14 @@ static int og0ve1b_set_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_format *fmt)
{
+ struct og0ve1b *og0ve1b = to_og0ve1b(sd);
struct v4l2_mbus_framefmt *format;
const struct og0ve1b_mode *mode;
format = v4l2_subdev_state_get_format(state, 0);
- mode = v4l2_find_nearest_size(supported_modes,
- ARRAY_SIZE(supported_modes),
+ mode = v4l2_find_nearest_size(og0ve1b->data->modes,
+ og0ve1b->data->num_modes,
width, height,
fmt->format.width,
fmt->format.height);
@@ -505,10 +539,12 @@ static int og0ve1b_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
+ struct og0ve1b *og0ve1b = to_og0ve1b(sd);
+
if (code->index > 0)
return -EINVAL;
- code->code = MEDIA_BUS_FMT_Y8_1X8;
+ code->code = og0ve1b->data->modes[0].code;
return 0;
}
@@ -517,15 +553,18 @@ static int og0ve1b_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
- if (fse->index >= ARRAY_SIZE(supported_modes))
+ struct og0ve1b *og0ve1b = to_og0ve1b(sd);
+ const struct og0ve1b_sensor_data *data = og0ve1b->data;
+
+ if (fse->index >= data->num_modes)
return -EINVAL;
- if (fse->code != MEDIA_BUS_FMT_Y8_1X8)
+ if (fse->code != data->modes[fse->index].code)
return -EINVAL;
- fse->min_width = supported_modes[fse->index].width;
+ fse->min_width = data->modes[fse->index].width;
fse->max_width = fse->min_width;
- fse->min_height = supported_modes[fse->index].height;
+ fse->min_height = data->modes[fse->index].height;
fse->max_height = fse->min_height;
return 0;
@@ -534,13 +573,14 @@ static int og0ve1b_enum_frame_size(struct v4l2_subdev *sd,
static int og0ve1b_init_state(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state)
{
+ const struct og0ve1b_mode *mode = &to_og0ve1b(sd)->data->modes[0];
struct v4l2_subdev_format fmt = {
.which = V4L2_SUBDEV_FORMAT_TRY,
.pad = 0,
.format = {
- .code = MEDIA_BUS_FMT_Y8_1X8,
- .width = supported_modes[0].width,
- .height = supported_modes[0].height,
+ .code = mode->code,
+ .width = mode->width,
+ .height = mode->height,
},
};
@@ -586,9 +626,9 @@ static int og0ve1b_identify_sensor(struct og0ve1b *og0ve1b)
return ret;
}
- if (val != OG0VE1B_CHIP_ID) {
- dev_err(og0ve1b->dev, "chip id mismatch: %x!=%llx\n",
- OG0VE1B_CHIP_ID, val);
+ if (val != og0ve1b->data->chip_id) {
+ dev_err(og0ve1b->dev, "chip id mismatch: %llx!=%llx\n",
+ og0ve1b->data->chip_id, val);
return -ENODEV;
}
@@ -624,8 +664,8 @@ static int og0ve1b_check_hwcfg(struct og0ve1b *og0ve1b)
ret = v4l2_link_freq_to_bitmap(og0ve1b->dev,
bus_cfg.link_frequencies,
bus_cfg.nr_of_link_frequencies,
- og0ve1b_link_freq_menu,
- ARRAY_SIZE(og0ve1b_link_freq_menu),
+ og0ve1b->data->link_freq_menu,
+ og0ve1b->data->num_link_freqs,
&freq_bitmap);
v4l2_fwnode_endpoint_free(&bus_cfg);
@@ -686,6 +726,9 @@ static int og0ve1b_probe(struct i2c_client *client)
return -ENOMEM;
og0ve1b->dev = &client->dev;
+ og0ve1b->data = i2c_get_match_data(client);
+ if (!og0ve1b->data)
+ return -ENODEV;
v4l2_i2c_subdev_init(&og0ve1b->sd, client, &og0ve1b_subdev_ops);
@@ -700,7 +743,7 @@ static int og0ve1b_probe(struct i2c_client *client)
"failed to get XVCLK clock\n");
freq = clk_get_rate(og0ve1b->xvclk);
- if (freq && freq != OG0VE1B_MCLK_FREQ_24MHZ)
+ if (freq && freq != og0ve1b->data->mclk_freq)
return dev_err_probe(og0ve1b->dev, -EINVAL,
"XVCLK clock frequency %lu is not supported\n",
freq);
@@ -819,7 +862,7 @@ static const struct dev_pm_ops og0ve1b_pm_ops = {
};
static const struct of_device_id og0ve1b_of_match[] = {
- { .compatible = "ovti,og0ve1b" },
+ { .compatible = "ovti,og0ve1b", .data = &og0ve1b_data },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, og0ve1b_of_match);
--
2.34.1