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Message-ID: <3a8cbb8f0eeab1bfbb3bd539405e646bd081ea06.camel@apitzsch.eu>
Date: Sun, 01 Dec 2024 19:41:30 +0100
From: André Apitzsch <git@...tzsch.eu>
To: Ricardo Ribalda Delgado <ribalda@...nel.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, Sakari Ailus
<sakari.ailus@...ux.intel.com>, ~postmarketos/upstreaming@...ts.sr.ht,
phone-devel@...r.kernel.org, linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org, Dave Stevenson
<dave.stevenson@...pberrypi.com>
Subject: Re: [PATCH v2 02/13] media: i2c: imx214: Use subdev active state
Hi,
Am Mittwoch, dem 30.10.2024 um 12:36 +0100 schrieb Ricardo Ribalda
Delgado:
> Hi
>
> It looks good to me, but I would like Sakari to review it. I am not
> sure if it is ok to keep the cur_mode variable.
>
> On Mon, Oct 21, 2024 at 12:14 AM André Apitzsch via B4 Relay
> <devnull+git.apitzsch.eu@...nel.org> wrote:
> >
> > 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.
> >
> > While at it, simplify imx214_start_streaming() by removing unneeded
> > goto
> > statements and the corresponding error label.
> >
> > Signed-off-by: André Apitzsch <git@...tzsch.eu>
> > ---
> > drivers/media/i2c/imx214.c | 159 +++++++++++++++------------------
> > ------------
> > 1 file changed, 53 insertions(+), 106 deletions(-)
> >
> > diff --git a/drivers/media/i2c/imx214.c
> > b/drivers/media/i2c/imx214.c
> > index
> > 5d411452d342fdb177619cd1c9fd9650d31089bb..990fd0811904fc478c05d6405
> > 4089fc2879cae94 100644
> > --- a/drivers/media/i2c/imx214.c
> > +++ b/drivers/media/i2c/imx214.c
> > @@ -59,8 +59,6 @@ struct imx214 {
> >
> > struct v4l2_subdev sd;
> > struct media_pad pad;
> > - struct v4l2_mbus_framefmt fmt;
> > - struct v4l2_rect crop;
> >
> > struct v4l2_ctrl_handler ctrls;
> > struct v4l2_ctrl *pixel_rate;
> > @@ -68,15 +66,11 @@ struct imx214 {
> > struct v4l2_ctrl *exposure;
> > struct v4l2_ctrl *unit_size;
> >
> > + const struct imx214_mode *cur_mode;
> > +
> > 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 +568,25 @@ 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 = v4l2_subdev_state_get_format(sd_state, 0);
> >
> > - __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);
> > + if (imx214->cur_mode == mode && __format->code == format-
> > >format.code)
> > + return 0;
> >
>
> Isnt' if (imx214->cur_mode == mode) enough?
>
I'll drop the complete check, as it was done for imx219 in
faece4ad72b0 ("media: i2c: imx219: Perform a full mode set unconditionally")
Best regards,
André
>
> > - 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;
> > +
> > + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
> > + imx214->cur_mode = mode;
> >
> > return 0;
> > }
> > @@ -640,14 +595,9 @@ 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:
> > @@ -826,40 +776,28 @@ static int imx214_write_table(struct imx214
> > *imx214,
> >
> > 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);
> > - goto error;
> > + return ret;
> > }
> >
> > - mode = v4l2_find_nearest_size(imx214_modes,
> > - ARRAY_SIZE(imx214_modes), width,
> > height,
> > - imx214->fmt.width, imx214-
> > >fmt.height);
> > - ret = imx214_write_table(imx214, mode->reg_table);
> > + ret = imx214_write_table(imx214, imx214->cur_mode-
> > >reg_table);
> > if (ret < 0) {
> > dev_err(imx214->dev, "could not sent mode table
> > %d\n", ret);
> > - goto error;
> > + return ret;
> > }
> > ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
> > if (ret < 0) {
> > dev_err(imx214->dev, "could not sync v4l2
> > controls\n");
> > - goto error;
> > + return ret;
> > }
> > ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT,
> > IMX214_MODE_STREAMING);
> > - if (ret < 0) {
> > + if (ret < 0)
> > dev_err(imx214->dev, "could not sent start table
> > %d\n", ret);
> > - goto error;
> > - }
> >
> > - mutex_unlock(&imx214->mutex);
> > - return 0;
> > -
> > -error:
> > - mutex_unlock(&imx214->mutex);
> > return ret;
> > }
> >
> > @@ -877,6 +815,7 @@ 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 +823,9 @@ 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 +889,7 @@ 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,
> > @@ -1079,13 +1020,13 @@ static int imx214_probe(struct i2c_client
> > *client)
> > pm_runtime_enable(imx214->dev);
> > pm_runtime_idle(imx214->dev);
> >
> > + /* Set default mode to max resolution */
> > + imx214->cur_mode = &imx214_modes[0];
> > +
> > ret = imx214_ctrls_init(imx214);
> > 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[] = {
> >
> > --
> > 2.47.0
> >
> >
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