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Subject: media: i2c: imx219: Use subdev active state
Author: Jacopo Mondi <jacopo.mo...@ideasonboard.com>
Date: Mon Jul 10 17:52:01 2023 +0200
Port the imx219 sensor driver to use the subdev active state.
Move all the format configuration to the subdevice state and simplify
the format handling, locking and initialization.
Signed-off-by: Jacopo Mondi <jacopo.mo...@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>
drivers/media/i2c/imx219.c | 179 ++++++++++++---------------------------------
1 file changed, 48 insertions(+), 131 deletions(-)
---
diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index 6963e24e1bc2..73e06583d651 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -460,8 +460,6 @@ struct imx219 {
struct v4l2_subdev sd;
struct media_pad pad;
- struct v4l2_mbus_framefmt fmt;
-
struct clk *xclk; /* system clock to IMX219 */
u32 xclk_freq;
@@ -481,12 +479,6 @@ struct imx219 {
/* Current mode */
const struct imx219_mode *mode;
- /*
- * Mutex for serialized access:
- * Protect sensor module set pad format and start/stop streaming safely.
- */
- struct mutex mutex;
-
/* Streaming on/off */
bool streaming;
@@ -576,8 +568,6 @@ static u32 imx219_get_format_code(struct imx219 *imx219,
u32 code)
{
unsigned int i;
- lockdep_assert_held(&imx219->mutex);
-
for (i = 0; i < ARRAY_SIZE(imx219_mbus_formats); i++)
if (imx219_mbus_formats[i] == code)
break;
@@ -591,20 +581,6 @@ static u32 imx219_get_format_code(struct imx219 *imx219,
u32 code)
return imx219_mbus_formats[i];
}
-static void imx219_set_default_format(struct imx219 *imx219)
-{
- struct v4l2_mbus_framefmt *fmt;
-
- fmt = &imx219->fmt;
- fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
- fmt->colorspace = V4L2_COLORSPACE_RAW;
- fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
- fmt->width = supported_modes[0].width;
- fmt->height = supported_modes[0].height;
- fmt->field = V4L2_FIELD_NONE;
- fmt->xfer_func = V4L2_XFER_FUNC_NONE;
-}
-
static int imx219_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct imx219 *imx219 =
@@ -701,9 +677,6 @@ static int imx219_init_cfg(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *format;
struct v4l2_rect *crop;
- /* imx219_get_format_code() wants mutex locked. */
- mutex_lock(&imx219->mutex);
-
/* Initialize try_fmt */
format = v4l2_subdev_get_pad_format(sd, state, 0);
format->width = supported_modes[0].width;
@@ -723,8 +696,6 @@ static int imx219_init_cfg(struct v4l2_subdev *sd,
crop->width = IMX219_PIXEL_ARRAY_WIDTH;
crop->height = IMX219_PIXEL_ARRAY_HEIGHT;
- mutex_unlock(&imx219->mutex);
-
return 0;
}
@@ -737,9 +708,7 @@ static int imx219_enum_mbus_code(struct v4l2_subdev *sd,
if (code->index >= (ARRAY_SIZE(imx219_mbus_formats) / 4))
return -EINVAL;
- mutex_lock(&imx219->mutex);
code->code = imx219_get_format_code(imx219,
imx219_mbus_formats[code->index * 4]);
- mutex_unlock(&imx219->mutex);
return 0;
}
@@ -754,9 +723,7 @@ static int imx219_enum_frame_size(struct v4l2_subdev *sd,
if (fse->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
- mutex_lock(&imx219->mutex);
code = imx219_get_format_code(imx219, fse->code);
- mutex_unlock(&imx219->mutex);
if (fse->code != code)
return -EINVAL;
@@ -785,52 +752,16 @@ static void imx219_update_pad_format(struct imx219
*imx219,
imx219_reset_colorspace(&fmt->format);
}
-static int __imx219_get_pad_format(struct imx219 *imx219,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *fmt)
-{
- if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
- struct v4l2_mbus_framefmt *try_fmt =
- v4l2_subdev_get_try_format(&imx219->sd, sd_state,
- fmt->pad);
- /* update the code which could change due to vflip or hflip: */
- try_fmt->code = imx219_get_format_code(imx219, try_fmt->code);
- fmt->format = *try_fmt;
- } else {
- imx219_update_pad_format(imx219, imx219->mode, fmt);
- fmt->format.code = imx219_get_format_code(imx219,
- imx219->fmt.code);
- }
-
- return 0;
-}
-
-static int imx219_get_pad_format(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *fmt)
-{
- struct imx219 *imx219 = to_imx219(sd);
- int ret;
-
- mutex_lock(&imx219->mutex);
- ret = __imx219_get_pad_format(imx219, sd_state, fmt);
- mutex_unlock(&imx219->mutex);
-
- return ret;
-}
-
static int imx219_set_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct imx219 *imx219 = to_imx219(sd);
const struct imx219_mode *mode;
- struct v4l2_mbus_framefmt *framefmt;
int exposure_max, exposure_def, hblank;
+ struct v4l2_mbus_framefmt *format;
unsigned int i;
- mutex_lock(&imx219->mutex);
-
for (i = 0; i < ARRAY_SIZE(imx219_mbus_formats); i++)
if (imx219_mbus_formats[i] == fmt->format.code)
break;
@@ -844,13 +775,14 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd,
ARRAY_SIZE(supported_modes),
width, height,
fmt->format.width, fmt->format.height);
+
imx219_update_pad_format(imx219, mode, fmt);
- if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
- framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
- *framefmt = fmt->format;
- } else if (imx219->mode != mode ||
- imx219->fmt.code != fmt->format.code) {
- imx219->fmt = fmt->format;
+ format = v4l2_subdev_get_pad_format(sd, sd_state, 0);
+
+ if (imx219->mode == mode && format->code == fmt->format.code)
+ return 0;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
imx219->mode = mode;
/* Update limits and set FPS to default */
__v4l2_ctrl_modify_range(imx219->vblank, IMX219_VBLANK_MIN,
@@ -876,14 +808,15 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd,
hblank);
}
- mutex_unlock(&imx219->mutex);
+ *format = fmt->format;
return 0;
}
-static int imx219_set_framefmt(struct imx219 *imx219)
+static int imx219_set_framefmt(struct imx219 *imx219,
+ const struct v4l2_mbus_framefmt *format)
{
- switch (imx219->fmt.code) {
+ switch (format->code) {
case MEDIA_BUS_FMT_SRGGB8_1X8:
case MEDIA_BUS_FMT_SGRBG8_1X8:
case MEDIA_BUS_FMT_SGBRG8_1X8:
@@ -902,7 +835,8 @@ static int imx219_set_framefmt(struct imx219 *imx219)
return -EINVAL;
}
-static int imx219_set_binning(struct imx219 *imx219)
+static int imx219_set_binning(struct imx219 *imx219,
+ const struct v4l2_mbus_framefmt *format)
{
if (!imx219->mode->binning) {
return imx219_write_reg(imx219, IMX219_REG_BINNING_MODE,
@@ -910,7 +844,7 @@ static int imx219_set_binning(struct imx219 *imx219)
IMX219_BINNING_NONE);
}
- switch (imx219->fmt.code) {
+ switch (format->code) {
case MEDIA_BUS_FMT_SRGGB8_1X8:
case MEDIA_BUS_FMT_SGRBG8_1X8:
case MEDIA_BUS_FMT_SGBRG8_1X8:
@@ -931,34 +865,13 @@ static int imx219_set_binning(struct imx219 *imx219)
return -EINVAL;
}
-static const struct v4l2_rect *
-__imx219_get_pad_crop(struct imx219 *imx219,
- struct v4l2_subdev_state *sd_state,
- unsigned int pad, enum v4l2_subdev_format_whence which)
-{
- switch (which) {
- case V4L2_SUBDEV_FORMAT_TRY:
- return v4l2_subdev_get_try_crop(&imx219->sd, sd_state, pad);
- case V4L2_SUBDEV_FORMAT_ACTIVE:
- return &imx219->mode->crop;
- }
-
- return NULL;
-}
-
static int imx219_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
switch (sel->target) {
case V4L2_SEL_TGT_CROP: {
- struct imx219 *imx219 = to_imx219(sd);
-
- mutex_lock(&imx219->mutex);
- sel->r = *__imx219_get_pad_crop(imx219, sd_state, sel->pad,
- sel->which);
- mutex_unlock(&imx219->mutex);
-
+ sel->r = *v4l2_subdev_get_pad_crop(sd, sd_state, 0);
return 0;
}
@@ -990,9 +903,11 @@ static int imx219_configure_lanes(struct imx219 *imx219)
IMX219_CSI_2_LANE_MODE :
IMX219_CSI_4_LANE_MODE);
};
-static int imx219_start_streaming(struct imx219 *imx219)
+static int imx219_start_streaming(struct imx219 *imx219,
+ struct v4l2_subdev_state *state)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
+ const struct v4l2_mbus_framefmt *format;
const struct imx219_reg_list *reg_list;
int ret;
@@ -1022,14 +937,15 @@ static int imx219_start_streaming(struct imx219 *imx219)
goto err_rpm_put;
}
- ret = imx219_set_framefmt(imx219);
+ format = v4l2_subdev_get_pad_format(&imx219->sd, state, 0);
+ ret = imx219_set_framefmt(imx219, format);
if (ret) {
dev_err(&client->dev, "%s failed to set frame format: %d\n",
__func__, ret);
goto err_rpm_put;
}
- ret = imx219_set_binning(imx219);
+ ret = imx219_set_binning(imx219, format);
if (ret) {
dev_err(&client->dev, "%s failed to set binning: %d\n",
__func__, ret);
@@ -1078,35 +994,30 @@ static void imx219_stop_streaming(struct imx219 *imx219)
static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
{
struct imx219 *imx219 = to_imx219(sd);
+ struct v4l2_subdev_state *state;
int ret = 0;
- mutex_lock(&imx219->mutex);
- if (imx219->streaming == enable) {
- mutex_unlock(&imx219->mutex);
- return 0;
- }
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ if (imx219->streaming == enable)
+ goto unlock;
if (enable) {
/*
* Apply default & customized values
* and then start streaming.
*/
- ret = imx219_start_streaming(imx219);
+ ret = imx219_start_streaming(imx219, state);
if (ret)
- goto err_unlock;
+ goto unlock;
} else {
imx219_stop_streaming(imx219);
}
imx219->streaming = enable;
- mutex_unlock(&imx219->mutex);
-
- return ret;
-
-err_unlock:
- mutex_unlock(&imx219->mutex);
-
+unlock:
+ v4l2_subdev_unlock_state(state);
return ret;
}
@@ -1171,10 +1082,13 @@ static int __maybe_unused imx219_resume(struct device
*dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx219 *imx219 = to_imx219(sd);
+ struct v4l2_subdev_state *state;
int ret;
if (imx219->streaming) {
- ret = imx219_start_streaming(imx219);
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+ ret = imx219_start_streaming(imx219, state);
+ v4l2_subdev_unlock_state(state);
if (ret)
goto error;
}
@@ -1237,7 +1151,7 @@ static const struct v4l2_subdev_video_ops
imx219_video_ops = {
static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
.init_cfg = imx219_init_cfg,
.enum_mbus_code = imx219_enum_mbus_code,
- .get_fmt = imx219_get_pad_format,
+ .get_fmt = v4l2_subdev_get_fmt,
.set_fmt = imx219_set_pad_format,
.get_selection = imx219_get_selection,
.enum_frame_size = imx219_enum_frame_size,
@@ -1270,9 +1184,6 @@ static int imx219_init_controls(struct imx219 *imx219)
if (ret)
return ret;
- mutex_init(&imx219->mutex);
- ctrl_hdlr->lock = &imx219->mutex;
-
/* By default, PIXEL_RATE is read only */
imx219->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
V4L2_CID_PIXEL_RATE,
@@ -1369,7 +1280,6 @@ static int imx219_init_controls(struct imx219 *imx219)
error:
v4l2_ctrl_handler_free(ctrl_hdlr);
- mutex_destroy(&imx219->mutex);
return ret;
}
@@ -1377,7 +1287,6 @@ error:
static void imx219_free_controls(struct imx219 *imx219)
{
v4l2_ctrl_handler_free(imx219->sd.ctrl_handler);
- mutex_destroy(&imx219->mutex);
}
static int imx219_check_hwcfg(struct device *dev, struct imx219 *imx219)
@@ -1514,19 +1423,23 @@ static int imx219_probe(struct i2c_client *client)
/* Initialize source pad */
imx219->pad.flags = MEDIA_PAD_FL_SOURCE;
- /* Initialize default format */
- imx219_set_default_format(imx219);
-
ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad);
if (ret) {
dev_err(dev, "failed to init entity pads: %d\n", ret);
goto error_handler_free;
}
+ imx219->sd.state_lock = imx219->ctrl_handler.lock;
+ ret = v4l2_subdev_init_finalize(&imx219->sd);
+ if (ret < 0) {
+ dev_err(dev, "subdev init error: %d\n", ret);
+ goto error_media_entity;
+ }
+
ret = v4l2_async_register_subdev_sensor(&imx219->sd);
if (ret < 0) {
dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
- goto error_media_entity;
+ goto error_subdev_cleanup;
}
/* Enable runtime PM and turn off the device */
@@ -1536,6 +1449,9 @@ static int imx219_probe(struct i2c_client *client)
return 0;
+error_subdev_cleanup:
+ v4l2_subdev_cleanup(&imx219->sd);
+
error_media_entity:
media_entity_cleanup(&imx219->sd.entity);
@@ -1554,6 +1470,7 @@ static void imx219_remove(struct i2c_client *client)
struct imx219 *imx219 = to_imx219(sd);
v4l2_async_unregister_subdev(sd);
+ v4l2_subdev_cleanup(sd);
media_entity_cleanup(&sd->entity);
imx219_free_controls(imx219);
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