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Message-Id: <20240902-imx214-v1-1-c96cba989315@apitzsch.eu>
Date: Mon, 02 Sep 2024 23:54:28 +0200
From: André Apitzsch via B4 Relay <devnull+git.apitzsch.eu@...nel.org>
To: Ricardo Ribalda <ribalda@...nel.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
André Apitzsch <git@...tzsch.eu>
Subject: [PATCH 01/13] media: i2c: imx214: Use subdev active state
From: André Apitzsch <git@...tzsch.eu>
Port the imx214 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: André Apitzsch <git@...tzsch.eu>
---
drivers/media/i2c/imx214.c | 129 +++++++++++++--------------------------------
1 file changed, 38 insertions(+), 91 deletions(-)
diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
index 4962cfe7c83d..58f3c3f67e0d 100644
--- a/drivers/media/i2c/imx214.c
+++ b/drivers/media/i2c/imx214.c
@@ -71,12 +71,6 @@ struct imx214 {
struct regulator_bulk_data supplies[IMX214_NUM_SUPPLIES];
struct gpio_desc *enable_gpio;
-
- /*
- * Serialize control access, get/set format, get selection
- * and start streaming.
- */
- struct mutex mutex;
};
struct reg_8 {
@@ -490,6 +484,22 @@ static int __maybe_unused imx214_power_off(struct device *dev)
return 0;
}
+static void imx214_update_pad_format(struct imx214 *imx214,
+ const struct imx214_mode *mode,
+ struct v4l2_mbus_framefmt *fmt, u32 code)
+{
+ fmt->code = IMX214_MBUS_CODE;
+ fmt->width = mode->width;
+ fmt->height = mode->height;
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
+ fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
+ fmt->colorspace,
+ fmt->ycbcr_enc);
+ fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
+}
+
static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
@@ -549,52 +559,6 @@ static const struct v4l2_subdev_core_ops imx214_core_ops = {
#endif
};
-static struct v4l2_mbus_framefmt *
-__imx214_get_pad_format(struct imx214 *imx214,
- 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_state_get_format(sd_state, pad);
- case V4L2_SUBDEV_FORMAT_ACTIVE:
- return &imx214->fmt;
- default:
- return NULL;
- }
-}
-
-static int imx214_get_format(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
-{
- struct imx214 *imx214 = to_imx214(sd);
-
- mutex_lock(&imx214->mutex);
- format->format = *__imx214_get_pad_format(imx214, sd_state,
- format->pad,
- format->which);
- mutex_unlock(&imx214->mutex);
-
- return 0;
-}
-
-static struct v4l2_rect *
-__imx214_get_pad_crop(struct imx214 *imx214,
- 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_state_get_crop(sd_state, pad);
- case V4L2_SUBDEV_FORMAT_ACTIVE:
- return &imx214->crop;
- default:
- return NULL;
- }
-}
-
static int imx214_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
@@ -604,34 +568,19 @@ static int imx214_set_format(struct v4l2_subdev *sd,
struct v4l2_rect *__crop;
const struct imx214_mode *mode;
- mutex_lock(&imx214->mutex);
-
- __crop = __imx214_get_pad_crop(imx214, sd_state, format->pad,
- format->which);
-
mode = v4l2_find_nearest_size(imx214_modes,
ARRAY_SIZE(imx214_modes), width, height,
format->format.width,
format->format.height);
- __crop->width = mode->width;
- __crop->height = mode->height;
+ imx214_update_pad_format(imx214, mode, &format->format, format->format.code);
- __format = __imx214_get_pad_format(imx214, sd_state, format->pad,
- format->which);
- __format->width = __crop->width;
- __format->height = __crop->height;
- __format->code = IMX214_MBUS_CODE;
- __format->field = V4L2_FIELD_NONE;
- __format->colorspace = V4L2_COLORSPACE_SRGB;
- __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
- __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
- __format->colorspace, __format->ycbcr_enc);
- __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
+ __format = v4l2_subdev_state_get_format(sd_state, 0);
+ *__format = format->format;
- format->format = *__format;
-
- mutex_unlock(&imx214->mutex);
+ __crop = v4l2_subdev_state_get_crop(sd_state, 0);
+ __crop->width = mode->width;
+ __crop->height = mode->height;
return 0;
}
@@ -640,14 +589,9 @@ static int imx214_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
- struct imx214 *imx214 = to_imx214(sd);
-
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
- mutex_lock(&imx214->mutex);
- sel->r = *__imx214_get_pad_crop(imx214, sd_state, sel->pad,
- sel->which);
- mutex_unlock(&imx214->mutex);
+ sel->r = *v4l2_subdev_state_get_crop(sd_state, 0);
return 0;
case V4L2_SEL_TGT_NATIVE_SIZE:
@@ -829,7 +773,6 @@ static int imx214_start_streaming(struct imx214 *imx214)
const struct imx214_mode *mode;
int ret;
- mutex_lock(&imx214->mutex);
ret = imx214_write_table(imx214, mode_table_common);
if (ret < 0) {
dev_err(imx214->dev, "could not sent common table %d\n", ret);
@@ -855,11 +798,9 @@ static int imx214_start_streaming(struct imx214 *imx214)
goto error;
}
- mutex_unlock(&imx214->mutex);
return 0;
error:
- mutex_unlock(&imx214->mutex);
return ret;
}
@@ -877,6 +818,7 @@ static int imx214_stop_streaming(struct imx214 *imx214)
static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
{
struct imx214 *imx214 = to_imx214(subdev);
+ struct v4l2_subdev_state *state;
int ret;
if (enable) {
@@ -884,7 +826,9 @@ static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
if (ret < 0)
return ret;
+ state = v4l2_subdev_lock_and_get_active_state(subdev);
ret = imx214_start_streaming(imx214);
+ v4l2_subdev_unlock_state(state);
if (ret < 0)
goto err_rpm_put;
} else {
@@ -948,7 +892,7 @@ static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
.enum_mbus_code = imx214_enum_mbus_code,
.enum_frame_size = imx214_enum_frame_size,
.enum_frame_interval = imx214_enum_frame_interval,
- .get_fmt = imx214_get_format,
+ .get_fmt = v4l2_subdev_get_fmt,
.set_fmt = imx214_set_format,
.get_selection = imx214_get_selection,
.get_frame_interval = imx214_get_frame_interval,
@@ -1083,9 +1027,6 @@ static int imx214_probe(struct i2c_client *client)
if (ret < 0)
goto error_power_off;
- mutex_init(&imx214->mutex);
- imx214->ctrls.lock = &imx214->mutex;
-
imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
imx214->sd.dev = &client->dev;
@@ -1097,20 +1038,27 @@ static int imx214_probe(struct i2c_client *client)
goto free_ctrl;
}
- imx214_entity_init_state(&imx214->sd, NULL);
+ imx214->sd.state_lock = imx214->ctrls.lock;
+ ret = v4l2_subdev_init_finalize(&imx214->sd);
+ if (ret < 0) {
+ dev_err(dev, "subdev init error: %d\n", ret);
+ goto free_entity;
+ }
ret = v4l2_async_register_subdev_sensor(&imx214->sd);
if (ret < 0) {
dev_err(dev, "could not register v4l2 device\n");
- goto free_entity;
+ goto error_subdev_cleanup;
}
return 0;
+error_subdev_cleanup:
+ v4l2_subdev_cleanup(&imx214->sd);
+
free_entity:
media_entity_cleanup(&imx214->sd.entity);
free_ctrl:
- mutex_destroy(&imx214->mutex);
v4l2_ctrl_handler_free(&imx214->ctrls);
error_power_off:
pm_runtime_disable(imx214->dev);
@@ -1125,13 +1073,12 @@ static void imx214_remove(struct i2c_client *client)
struct imx214 *imx214 = to_imx214(sd);
v4l2_async_unregister_subdev(&imx214->sd);
+ v4l2_subdev_cleanup(sd);
media_entity_cleanup(&imx214->sd.entity);
v4l2_ctrl_handler_free(&imx214->ctrls);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
-
- mutex_destroy(&imx214->mutex);
}
static const struct of_device_id imx214_of_match[] = {
--
2.46.0
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