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From: Jacopo Mondi <jacopo@jmondi.org>
To: mchehab@kernel.org, sakari.ailus@linux.intel.com,
hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com,
roman.kovalivskyi@globallogic.com, dave.stevenson@raspberrypi.org,
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Dave Stevenson <dave.stevenson@raspberrypi.com>,
Jacopo Mondi <jacopo@jmondi.org>
Subject: [PATCH 22/25] media: ov5647: Support V4L2_CID_PIXEL_RATE
Date: Tue, 23 Jun 2020 18:55:47 +0200
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| Series |
media: ov5647: Support RaspberryPi Camera Module v1
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Commit Message
Jacopo Mondi
June 23, 2020, 4:55 p.m. UTC
From: Dave Stevenson <dave.stevenson@raspberrypi.com> Clients need to know the pixel rate in order to compute exposure and frame rate values. Advertise it. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> --- drivers/media/i2c/ov5647.c | 40 +++++++++++++++++++++++++++++++------- 1 file changed, 33 insertions(+), 7 deletions(-)
Comments
On 23.06.20 18:55, Jacopo Mondi wrote: > From: Dave Stevenson <dave.stevenson@raspberrypi.com> > > Clients need to know the pixel rate in order to compute exposure > and frame rate values. Advertise it. > > Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> > Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> > --- > drivers/media/i2c/ov5647.c | 40 +++++++++++++++++++++++++++++++------- > 1 file changed, 33 insertions(+), 7 deletions(-) > > diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c > index 35865e56de5f9..218576a05e66b 100644 > --- a/drivers/media/i2c/ov5647.c > +++ b/drivers/media/i2c/ov5647.c > @@ -76,6 +76,7 @@ struct regval_list { > struct ov5647_mode { > struct v4l2_mbus_framefmt format; > struct v4l2_rect crop; > + u64 pixel_rate; > struct regval_list *reg_list; > unsigned int num_regs; > }; > @@ -97,6 +98,7 @@ struct ov5647 { > struct v4l2_ctrl_handler ctrls; > struct ov5647_mode *mode; > struct ov5647_mode *current_mode; > + struct v4l2_ctrl *pixel_rate; > }; > > static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd) > @@ -583,6 +585,7 @@ static struct ov5647_mode ov5647_sbggr8_modes[] = { > .width = 1280, > .height = 960, > }, > + .pixel_rate = 77291670, > .reg_list = ov5647_640x480_sbggr8, > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr8) > }, > @@ -604,6 +607,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > .width = 2592, > .height = 1944 > }, > + .pixel_rate = 87500000, > .reg_list = ov5647_2592x1944_sbggr10, > .num_regs = ARRAY_SIZE(ov5647_2592x1944_sbggr10) > }, > @@ -622,6 +626,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > .width = 1928, > .height = 1080, > }, > + .pixel_rate = 81666700, > .reg_list = ov5647_1080p30_sbggr10, > .num_regs = ARRAY_SIZE(ov5647_1080p30_sbggr10) > }, > @@ -640,6 +645,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > .width = 2592, > .height = 1944, > }, > + .pixel_rate = 81666700, > .reg_list = ov5647_2x2binned_sbggr10, > .num_regs = ARRAY_SIZE(ov5647_2x2binned_sbggr10) > }, > @@ -658,6 +664,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > .width = 2560, > .height = 1920, > }, > + .pixel_rate = 55000000, > .reg_list = ov5647_640x480_sbggr10, > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr10) > }, > @@ -1094,6 +1101,10 @@ static int ov5647_set_pad_fmt(struct v4l2_subdev *sd, > /* Update the sensor mode and apply at it at streamon time. */ > mutex_lock(&sensor->lock); > sensor->mode = mode; > + > + __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate, > + mode->pixel_rate, 1, mode->pixel_rate); > + > *fmt = mode->format; > mutex_unlock(&sensor->lock); > > @@ -1295,6 +1306,9 @@ static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl) > return ov5647_s_analogue_gain(sd, ctrl->val); > case V4L2_CID_EXPOSURE: > return ov5647_s_exposure(sd, ctrl->val); > + case V4L2_CID_PIXEL_RATE: > + /* Read-only, but we adjust it based on mode. */ Looking at other drivers, I see they don't handle read only controls in s_ctrl cb. Also the docs (vidioc-queryctrl.rst) says that trying to set a read only control should return EINVAL Thanks, Dafna > + return 0; > default: > dev_info(&client->dev, > "Control (id:0x%x, val:0x%x) not supported\n", > @@ -1313,7 +1327,7 @@ static int ov5647_init_controls(struct ov5647 *sensor) > { > struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd); > > - v4l2_ctrl_handler_init(&sensor->ctrls, 5); > + v4l2_ctrl_handler_init(&sensor->ctrls, 6); > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > V4L2_CID_AUTOGAIN, 0, 1, 1, 0); > @@ -1333,17 +1347,29 @@ static int ov5647_init_controls(struct ov5647 *sensor) > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32); > > - if (sensor->ctrls.error) { > - dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > - __func__, sensor->ctrls.error); > - v4l2_ctrl_handler_free(&sensor->ctrls); > + /* By default, PIXEL_RATE is read only, but it does change per mode */ > + sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > + V4L2_CID_PIXEL_RATE, > + sensor->mode->pixel_rate, > + sensor->mode->pixel_rate, 1, > + sensor->mode->pixel_rate); > + if (!sensor->pixel_rate) > + goto handler_free; > + sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > - return sensor->ctrls.error; > - } > + if (sensor->ctrls.error) > + goto handler_free; > > sensor->sd.ctrl_handler = &sensor->ctrls; > > return 0; > + > +handler_free: > + dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > + __func__, sensor->ctrls.error); > + v4l2_ctrl_handler_free(&sensor->ctrls); > + > + return sensor->ctrls.error; > } > > static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np) >
Hi Dafna On Mon, 29 Jun 2020 at 18:01, Dafna Hirschfeld <dafna.hirschfeld@collabora.com> wrote: > > > > On 23.06.20 18:55, Jacopo Mondi wrote: > > From: Dave Stevenson <dave.stevenson@raspberrypi.com> > > > > Clients need to know the pixel rate in order to compute exposure > > and frame rate values. Advertise it. > > > > Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> > > Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> > > --- > > drivers/media/i2c/ov5647.c | 40 +++++++++++++++++++++++++++++++------- > > 1 file changed, 33 insertions(+), 7 deletions(-) > > > > diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c > > index 35865e56de5f9..218576a05e66b 100644 > > --- a/drivers/media/i2c/ov5647.c > > +++ b/drivers/media/i2c/ov5647.c > > @@ -76,6 +76,7 @@ struct regval_list { > > struct ov5647_mode { > > struct v4l2_mbus_framefmt format; > > struct v4l2_rect crop; > > + u64 pixel_rate; > > struct regval_list *reg_list; > > unsigned int num_regs; > > }; > > @@ -97,6 +98,7 @@ struct ov5647 { > > struct v4l2_ctrl_handler ctrls; > > struct ov5647_mode *mode; > > struct ov5647_mode *current_mode; > > + struct v4l2_ctrl *pixel_rate; > > }; > > > > static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd) > > @@ -583,6 +585,7 @@ static struct ov5647_mode ov5647_sbggr8_modes[] = { > > .width = 1280, > > .height = 960, > > }, > > + .pixel_rate = 77291670, > > .reg_list = ov5647_640x480_sbggr8, > > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr8) > > }, > > @@ -604,6 +607,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > .width = 2592, > > .height = 1944 > > }, > > + .pixel_rate = 87500000, > > .reg_list = ov5647_2592x1944_sbggr10, > > .num_regs = ARRAY_SIZE(ov5647_2592x1944_sbggr10) > > }, > > @@ -622,6 +626,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > .width = 1928, > > .height = 1080, > > }, > > + .pixel_rate = 81666700, > > .reg_list = ov5647_1080p30_sbggr10, > > .num_regs = ARRAY_SIZE(ov5647_1080p30_sbggr10) > > }, > > @@ -640,6 +645,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > .width = 2592, > > .height = 1944, > > }, > > + .pixel_rate = 81666700, > > .reg_list = ov5647_2x2binned_sbggr10, > > .num_regs = ARRAY_SIZE(ov5647_2x2binned_sbggr10) > > }, > > @@ -658,6 +664,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > .width = 2560, > > .height = 1920, > > }, > > + .pixel_rate = 55000000, > > .reg_list = ov5647_640x480_sbggr10, > > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr10) > > }, > > @@ -1094,6 +1101,10 @@ static int ov5647_set_pad_fmt(struct v4l2_subdev *sd, > > /* Update the sensor mode and apply at it at streamon time. */ > > mutex_lock(&sensor->lock); > > sensor->mode = mode; > > + > > + __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate, > > + mode->pixel_rate, 1, mode->pixel_rate); > > + > > *fmt = mode->format; > > mutex_unlock(&sensor->lock); > > > > @@ -1295,6 +1306,9 @@ static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl) > > return ov5647_s_analogue_gain(sd, ctrl->val); > > case V4L2_CID_EXPOSURE: > > return ov5647_s_exposure(sd, ctrl->val); > > + case V4L2_CID_PIXEL_RATE: > > + /* Read-only, but we adjust it based on mode. */ > > Looking at other drivers, I see they don't handle read only controls > in s_ctrl cb. Also the docs (vidioc-queryctrl.rst) says that trying to set a read only control should > return EINVAL It was a while ago that I looked at this, but my memory says that without a handler here then the call to __v4l2_ctrl_modify_range to update the value failed. The ranges and default were changed, but the current value wasn't. Checking now, yes, without returning 0 here, __v4l2_ctrl_modify_range returns -22 (-EINVAL) and v4l2-ctl --list-ctrls afterwards shows Image Processing Controls pixel_rate 0x009f0902 (int64) : min=87500000 max=87500000 step=1 default=87500000 value=81666700 flags=read-only A failure of the framework then and needs fixing there, or is it correct for the driver to have to implement a set hander if it needs to update the ranges? A quick grep implies that ov5647 is the first driver that needs to update V4L2_CID_PIXEL_RATE based on mode. I'll check in the morning if things like V4L2_CID_HBLANK behave the same - it may be a control type issue with 64 bit values. Interesting that the docs say EINVAL as at least one path in the framework appears to return -EACCES [1] Checking it: pi@raspberrypi:~ $ v4l2-ctl --set-ctrl pixel_rate=42 VIDIOC_S_EXT_CTRLS: failed: Permission denied Error setting controls: Permission denied which would imply -EACCES I am testing on a 5.4 kernel rather than media_tree.git, but there don't appear to be any significant differences in this area between the two. Cheers. Dave [1] https://git.linuxtv.org/media_tree.git/tree/drivers/media/v4l2-core/v4l2-ctrls.c#n4224 > Thanks, > Dafna > > > + return 0; > > default: > > dev_info(&client->dev, > > "Control (id:0x%x, val:0x%x) not supported\n", > > @@ -1313,7 +1327,7 @@ static int ov5647_init_controls(struct ov5647 *sensor) > > { > > struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd); > > > > - v4l2_ctrl_handler_init(&sensor->ctrls, 5); > > + v4l2_ctrl_handler_init(&sensor->ctrls, 6); > > > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > V4L2_CID_AUTOGAIN, 0, 1, 1, 0); > > @@ -1333,17 +1347,29 @@ static int ov5647_init_controls(struct ov5647 *sensor) > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32); > > > > - if (sensor->ctrls.error) { > > - dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > > - __func__, sensor->ctrls.error); > > - v4l2_ctrl_handler_free(&sensor->ctrls); > > + /* By default, PIXEL_RATE is read only, but it does change per mode */ > > + sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > + V4L2_CID_PIXEL_RATE, > > + sensor->mode->pixel_rate, > > + sensor->mode->pixel_rate, 1, > > + sensor->mode->pixel_rate); > > + if (!sensor->pixel_rate) > > + goto handler_free; > > + sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > > > - return sensor->ctrls.error; > > - } > > + if (sensor->ctrls.error) > > + goto handler_free; > > > > sensor->sd.ctrl_handler = &sensor->ctrls; > > > > return 0; > > + > > +handler_free: > > + dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > > + __func__, sensor->ctrls.error); > > + v4l2_ctrl_handler_free(&sensor->ctrls); > > + > > + return sensor->ctrls.error; > > } > > > > static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np) > > > _______________________________________________ > libcamera-devel mailing list > libcamera-devel@lists.libcamera.org > https://lists.libcamera.org/listinfo/libcamera-devel
On Mon, 29 Jun 2020 at 22:25, Dave Stevenson <dave.stevenson@raspberrypi.com> wrote: > > Hi Dafna > > On Mon, 29 Jun 2020 at 18:01, Dafna Hirschfeld > <dafna.hirschfeld@collabora.com> wrote: > > > > > > > > On 23.06.20 18:55, Jacopo Mondi wrote: > > > From: Dave Stevenson <dave.stevenson@raspberrypi.com> > > > > > > Clients need to know the pixel rate in order to compute exposure > > > and frame rate values. Advertise it. > > > > > > Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> > > > Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> > > > --- > > > drivers/media/i2c/ov5647.c | 40 +++++++++++++++++++++++++++++++------- > > > 1 file changed, 33 insertions(+), 7 deletions(-) > > > > > > diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c > > > index 35865e56de5f9..218576a05e66b 100644 > > > --- a/drivers/media/i2c/ov5647.c > > > +++ b/drivers/media/i2c/ov5647.c > > > @@ -76,6 +76,7 @@ struct regval_list { > > > struct ov5647_mode { > > > struct v4l2_mbus_framefmt format; > > > struct v4l2_rect crop; > > > + u64 pixel_rate; > > > struct regval_list *reg_list; > > > unsigned int num_regs; > > > }; > > > @@ -97,6 +98,7 @@ struct ov5647 { > > > struct v4l2_ctrl_handler ctrls; > > > struct ov5647_mode *mode; > > > struct ov5647_mode *current_mode; > > > + struct v4l2_ctrl *pixel_rate; > > > }; > > > > > > static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd) > > > @@ -583,6 +585,7 @@ static struct ov5647_mode ov5647_sbggr8_modes[] = { > > > .width = 1280, > > > .height = 960, > > > }, > > > + .pixel_rate = 77291670, > > > .reg_list = ov5647_640x480_sbggr8, > > > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr8) > > > }, > > > @@ -604,6 +607,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > .width = 2592, > > > .height = 1944 > > > }, > > > + .pixel_rate = 87500000, > > > .reg_list = ov5647_2592x1944_sbggr10, > > > .num_regs = ARRAY_SIZE(ov5647_2592x1944_sbggr10) > > > }, > > > @@ -622,6 +626,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > .width = 1928, > > > .height = 1080, > > > }, > > > + .pixel_rate = 81666700, > > > .reg_list = ov5647_1080p30_sbggr10, > > > .num_regs = ARRAY_SIZE(ov5647_1080p30_sbggr10) > > > }, > > > @@ -640,6 +645,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > .width = 2592, > > > .height = 1944, > > > }, > > > + .pixel_rate = 81666700, > > > .reg_list = ov5647_2x2binned_sbggr10, > > > .num_regs = ARRAY_SIZE(ov5647_2x2binned_sbggr10) > > > }, > > > @@ -658,6 +664,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > .width = 2560, > > > .height = 1920, > > > }, > > > + .pixel_rate = 55000000, > > > .reg_list = ov5647_640x480_sbggr10, > > > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr10) > > > }, > > > @@ -1094,6 +1101,10 @@ static int ov5647_set_pad_fmt(struct v4l2_subdev *sd, > > > /* Update the sensor mode and apply at it at streamon time. */ > > > mutex_lock(&sensor->lock); > > > sensor->mode = mode; > > > + > > > + __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate, > > > + mode->pixel_rate, 1, mode->pixel_rate); > > > + > > > *fmt = mode->format; > > > mutex_unlock(&sensor->lock); > > > > > > @@ -1295,6 +1306,9 @@ static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl) > > > return ov5647_s_analogue_gain(sd, ctrl->val); > > > case V4L2_CID_EXPOSURE: > > > return ov5647_s_exposure(sd, ctrl->val); > > > + case V4L2_CID_PIXEL_RATE: > > > + /* Read-only, but we adjust it based on mode. */ > > > > Looking at other drivers, I see they don't handle read only controls > > in s_ctrl cb. Also the docs (vidioc-queryctrl.rst) says that trying to set a read only control should > > return EINVAL > > It was a while ago that I looked at this, but my memory says that > without a handler here then the call to __v4l2_ctrl_modify_range to > update the value failed. The ranges and default were changed, but the > current value wasn't. > > Checking now, yes, without returning 0 here, __v4l2_ctrl_modify_range > returns -22 (-EINVAL) and v4l2-ctl --list-ctrls afterwards shows > Image Processing Controls > > pixel_rate 0x009f0902 (int64) : min=87500000 > max=87500000 step=1 default=87500000 value=81666700 flags=read-only > > A failure of the framework then and needs fixing there, or is it > correct for the driver to have to implement a set hander if it needs > to update the ranges? > A quick grep implies that ov5647 is the first driver that needs to > update V4L2_CID_PIXEL_RATE based on mode. I'll check in the morning if > things like V4L2_CID_HBLANK behave the same - it may be a control type > issue with 64 bit values. Just following this up, it's not a 64 bit control thing, it's any read only control won't update the current value if you use__v4l2_ctrl_modify_range. That's why the patch adding V4L2_CID_HBLANK has to do the same thing. I've just tried it on imx219 and it works fine..... The answer is down to "modern" sensor drivers using pm_runtime having a line if (pm_runtime_get_if_in_use(&client->dev) == 0) return 0; in their s_ctrl function. So whenever the sensor isn't streaming, which has to be the case for setting modes, gets a 0 return value from the s_ctrl call even though the control is invalid. That does seem to be a failure within the ctrl core then. Effectively other drivers do have this handling in, but via a different route. Hans or Sakari may have ideas on how they would like to see the core v4l2-ctrls code fixing to cover this. try_or_set_cluster is called from too many places for me to know whether it is safe to just skip the s_ctrl call for read only controls. Dave > Interesting that the docs say EINVAL as at least one path in the > framework appears to return -EACCES [1] > Checking it: > pi@raspberrypi:~ $ v4l2-ctl --set-ctrl pixel_rate=42 > VIDIOC_S_EXT_CTRLS: failed: Permission denied > Error setting controls: Permission denied > which would imply -EACCES > > I am testing on a 5.4 kernel rather than media_tree.git, but there > don't appear to be any significant differences in this area between > the two. > > Cheers. > Dave > > [1] https://git.linuxtv.org/media_tree.git/tree/drivers/media/v4l2-core/v4l2-ctrls.c#n4224 > > > Thanks, > > Dafna > > > > > + return 0; > > > default: > > > dev_info(&client->dev, > > > "Control (id:0x%x, val:0x%x) not supported\n", > > > @@ -1313,7 +1327,7 @@ static int ov5647_init_controls(struct ov5647 *sensor) > > > { > > > struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd); > > > > > > - v4l2_ctrl_handler_init(&sensor->ctrls, 5); > > > + v4l2_ctrl_handler_init(&sensor->ctrls, 6); > > > > > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > > V4L2_CID_AUTOGAIN, 0, 1, 1, 0); > > > @@ -1333,17 +1347,29 @@ static int ov5647_init_controls(struct ov5647 *sensor) > > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > > V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32); > > > > > > - if (sensor->ctrls.error) { > > > - dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > > > - __func__, sensor->ctrls.error); > > > - v4l2_ctrl_handler_free(&sensor->ctrls); > > > + /* By default, PIXEL_RATE is read only, but it does change per mode */ > > > + sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > > + V4L2_CID_PIXEL_RATE, > > > + sensor->mode->pixel_rate, > > > + sensor->mode->pixel_rate, 1, > > > + sensor->mode->pixel_rate); > > > + if (!sensor->pixel_rate) > > > + goto handler_free; > > > + sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > > > > > - return sensor->ctrls.error; > > > - } > > > + if (sensor->ctrls.error) > > > + goto handler_free; > > > > > > sensor->sd.ctrl_handler = &sensor->ctrls; > > > > > > return 0; > > > + > > > +handler_free: > > > + dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > > > + __func__, sensor->ctrls.error); > > > + v4l2_ctrl_handler_free(&sensor->ctrls); > > > + > > > + return sensor->ctrls.error; > > > } > > > > > > static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np) > > > > > _______________________________________________ > > libcamera-devel mailing list > > libcamera-devel@lists.libcamera.org > > https://lists.libcamera.org/listinfo/libcamera-devel
Hi Dave, (Question for Hans below) On Tue, Jun 30, 2020 at 04:13:29PM +0100, Dave Stevenson wrote: > On Mon, 29 Jun 2020 at 22:25, Dave Stevenson wrote: > > On Mon, 29 Jun 2020 at 18:01, Dafna Hirschfeld wrote: > > > On 23.06.20 18:55, Jacopo Mondi wrote: > > > > From: Dave Stevenson <dave.stevenson@raspberrypi.com> > > > > > > > > Clients need to know the pixel rate in order to compute exposure > > > > and frame rate values. Advertise it. > > > > > > > > Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> > > > > Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> > > > > --- > > > > drivers/media/i2c/ov5647.c | 40 +++++++++++++++++++++++++++++++------- > > > > 1 file changed, 33 insertions(+), 7 deletions(-) > > > > > > > > diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c > > > > index 35865e56de5f9..218576a05e66b 100644 > > > > --- a/drivers/media/i2c/ov5647.c > > > > +++ b/drivers/media/i2c/ov5647.c > > > > @@ -76,6 +76,7 @@ struct regval_list { > > > > struct ov5647_mode { > > > > struct v4l2_mbus_framefmt format; > > > > struct v4l2_rect crop; > > > > + u64 pixel_rate; > > > > struct regval_list *reg_list; > > > > unsigned int num_regs; > > > > }; > > > > @@ -97,6 +98,7 @@ struct ov5647 { > > > > struct v4l2_ctrl_handler ctrls; > > > > struct ov5647_mode *mode; > > > > struct ov5647_mode *current_mode; > > > > + struct v4l2_ctrl *pixel_rate; > > > > }; > > > > > > > > static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd) > > > > @@ -583,6 +585,7 @@ static struct ov5647_mode ov5647_sbggr8_modes[] = { > > > > .width = 1280, > > > > .height = 960, > > > > }, > > > > + .pixel_rate = 77291670, > > > > .reg_list = ov5647_640x480_sbggr8, > > > > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr8) > > > > }, > > > > @@ -604,6 +607,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > > .width = 2592, > > > > .height = 1944 > > > > }, > > > > + .pixel_rate = 87500000, > > > > .reg_list = ov5647_2592x1944_sbggr10, > > > > .num_regs = ARRAY_SIZE(ov5647_2592x1944_sbggr10) > > > > }, > > > > @@ -622,6 +626,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > > .width = 1928, > > > > .height = 1080, > > > > }, > > > > + .pixel_rate = 81666700, > > > > .reg_list = ov5647_1080p30_sbggr10, > > > > .num_regs = ARRAY_SIZE(ov5647_1080p30_sbggr10) > > > > }, > > > > @@ -640,6 +645,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > > .width = 2592, > > > > .height = 1944, > > > > }, > > > > + .pixel_rate = 81666700, > > > > .reg_list = ov5647_2x2binned_sbggr10, > > > > .num_regs = ARRAY_SIZE(ov5647_2x2binned_sbggr10) > > > > }, > > > > @@ -658,6 +664,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { > > > > .width = 2560, > > > > .height = 1920, > > > > }, > > > > + .pixel_rate = 55000000, > > > > .reg_list = ov5647_640x480_sbggr10, > > > > .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr10) > > > > }, > > > > @@ -1094,6 +1101,10 @@ static int ov5647_set_pad_fmt(struct v4l2_subdev *sd, > > > > /* Update the sensor mode and apply at it at streamon time. */ > > > > mutex_lock(&sensor->lock); > > > > sensor->mode = mode; > > > > + > > > > + __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate, > > > > + mode->pixel_rate, 1, mode->pixel_rate); > > > > + > > > > *fmt = mode->format; > > > > mutex_unlock(&sensor->lock); > > > > > > > > @@ -1295,6 +1306,9 @@ static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl) > > > > return ov5647_s_analogue_gain(sd, ctrl->val); > > > > case V4L2_CID_EXPOSURE: > > > > return ov5647_s_exposure(sd, ctrl->val); > > > > + case V4L2_CID_PIXEL_RATE: > > > > + /* Read-only, but we adjust it based on mode. */ > > > > > > Looking at other drivers, I see they don't handle read only controls > > > in s_ctrl cb. Also the docs (vidioc-queryctrl.rst) says that trying to set a read only control should > > > return EINVAL > > > > It was a while ago that I looked at this, but my memory says that > > without a handler here then the call to __v4l2_ctrl_modify_range to > > update the value failed. The ranges and default were changed, but the > > current value wasn't. > > > > Checking now, yes, without returning 0 here, __v4l2_ctrl_modify_range > > returns -22 (-EINVAL) and v4l2-ctl --list-ctrls afterwards shows > > Image Processing Controls > > > > pixel_rate 0x009f0902 (int64) : min=87500000 > > max=87500000 step=1 default=87500000 value=81666700 flags=read-only > > > > A failure of the framework then and needs fixing there, or is it > > correct for the driver to have to implement a set hander if it needs > > to update the ranges? > > A quick grep implies that ov5647 is the first driver that needs to > > update V4L2_CID_PIXEL_RATE based on mode. I'll check in the morning if > > things like V4L2_CID_HBLANK behave the same - it may be a control type > > issue with 64 bit values. > > Just following this up, it's not a 64 bit control thing, it's any read > only control won't update the current value if you > use__v4l2_ctrl_modify_range. That's why the patch adding > V4L2_CID_HBLANK has to do the same thing. > I've just tried it on imx219 and it works fine..... > > The answer is down to "modern" sensor drivers using pm_runtime having a line > if (pm_runtime_get_if_in_use(&client->dev) == 0) > return 0; > in their s_ctrl function. So whenever the sensor isn't streaming, > which has to be the case for setting modes, gets a 0 return value from > the s_ctrl call even though the control is invalid. > That does seem to be a failure within the ctrl core then. Effectively > other drivers do have this handling in, but via a different route. > > Hans or Sakari may have ideas on how they would like to see the core > v4l2-ctrls code fixing to cover this. try_or_set_cluster is called > from too many places for me to know whether it is safe to just skip > the s_ctrl call for read only controls. I think the control framework shouldn't call .s_ctrl() for read-only controls. If it's read-only the __v4l2_ctrl_modify_range() is supposed to originate from the same driver, so any specific driver-side handling can be handled before or after calling __v4l2_ctrl_modify_range(). A better helper function to update the value of a read-only control may be a good idea. I may also have bypassed __v4l2_ctrl_modify_range() completely and set the value manually in the corresponding v4l2_ctrl instance, but I understand that this would be called a hack. I know we would lose support for control events in that case, but for V4L2_CID_PIXEL_RATE I don't think this is a problem. Control events are actually annoying to use synchronously, if you want to know what other controls have been impacted by a VIDIOC_S_CTRL call, userspace code to handle this through control events would be a bit cumbersome. > > Interesting that the docs say EINVAL as at least one path in the > > framework appears to return -EACCES [1] > > Checking it: > > pi@raspberrypi:~ $ v4l2-ctl --set-ctrl pixel_rate=42 > > VIDIOC_S_EXT_CTRLS: failed: Permission denied > > Error setting controls: Permission denied > > which would imply -EACCES > > > > I am testing on a 5.4 kernel rather than media_tree.git, but there > > don't appear to be any significant differences in this area between > > the two. > > > > [1] https://git.linuxtv.org/media_tree.git/tree/drivers/media/v4l2-core/v4l2-ctrls.c#n4224 > > > > > > + return 0; > > > > default: > > > > dev_info(&client->dev, > > > > "Control (id:0x%x, val:0x%x) not supported\n", > > > > @@ -1313,7 +1327,7 @@ static int ov5647_init_controls(struct ov5647 *sensor) > > > > { > > > > struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd); > > > > > > > > - v4l2_ctrl_handler_init(&sensor->ctrls, 5); > > > > + v4l2_ctrl_handler_init(&sensor->ctrls, 6); > > > > > > > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > > > V4L2_CID_AUTOGAIN, 0, 1, 1, 0); > > > > @@ -1333,17 +1347,29 @@ static int ov5647_init_controls(struct ov5647 *sensor) > > > > v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > > > V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32); > > > > > > > > - if (sensor->ctrls.error) { > > > > - dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > > > > - __func__, sensor->ctrls.error); > > > > - v4l2_ctrl_handler_free(&sensor->ctrls); > > > > + /* By default, PIXEL_RATE is read only, but it does change per mode */ > > > > + sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, > > > > + V4L2_CID_PIXEL_RATE, > > > > + sensor->mode->pixel_rate, > > > > + sensor->mode->pixel_rate, 1, > > > > + sensor->mode->pixel_rate); > > > > + if (!sensor->pixel_rate) > > > > + goto handler_free; > > > > + sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > > > > > > > - return sensor->ctrls.error; > > > > - } > > > > + if (sensor->ctrls.error) > > > > + goto handler_free; > > > > > > > > sensor->sd.ctrl_handler = &sensor->ctrls; > > > > > > > > return 0; > > > > + > > > > +handler_free: > > > > + dev_err(&client->dev, "%s Controls initialization failed (%d)\n", > > > > + __func__, sensor->ctrls.error); > > > > + v4l2_ctrl_handler_free(&sensor->ctrls); > > > > + > > > > + return sensor->ctrls.error; > > > > } > > > > > > > > static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c index 35865e56de5f9..218576a05e66b 100644 --- a/drivers/media/i2c/ov5647.c +++ b/drivers/media/i2c/ov5647.c @@ -76,6 +76,7 @@ struct regval_list { struct ov5647_mode { struct v4l2_mbus_framefmt format; struct v4l2_rect crop; + u64 pixel_rate; struct regval_list *reg_list; unsigned int num_regs; }; @@ -97,6 +98,7 @@ struct ov5647 { struct v4l2_ctrl_handler ctrls; struct ov5647_mode *mode; struct ov5647_mode *current_mode; + struct v4l2_ctrl *pixel_rate; }; static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd) @@ -583,6 +585,7 @@ static struct ov5647_mode ov5647_sbggr8_modes[] = { .width = 1280, .height = 960, }, + .pixel_rate = 77291670, .reg_list = ov5647_640x480_sbggr8, .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr8) }, @@ -604,6 +607,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { .width = 2592, .height = 1944 }, + .pixel_rate = 87500000, .reg_list = ov5647_2592x1944_sbggr10, .num_regs = ARRAY_SIZE(ov5647_2592x1944_sbggr10) }, @@ -622,6 +626,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { .width = 1928, .height = 1080, }, + .pixel_rate = 81666700, .reg_list = ov5647_1080p30_sbggr10, .num_regs = ARRAY_SIZE(ov5647_1080p30_sbggr10) }, @@ -640,6 +645,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { .width = 2592, .height = 1944, }, + .pixel_rate = 81666700, .reg_list = ov5647_2x2binned_sbggr10, .num_regs = ARRAY_SIZE(ov5647_2x2binned_sbggr10) }, @@ -658,6 +664,7 @@ static struct ov5647_mode ov5647_sbggr10_modes[] = { .width = 2560, .height = 1920, }, + .pixel_rate = 55000000, .reg_list = ov5647_640x480_sbggr10, .num_regs = ARRAY_SIZE(ov5647_640x480_sbggr10) }, @@ -1094,6 +1101,10 @@ static int ov5647_set_pad_fmt(struct v4l2_subdev *sd, /* Update the sensor mode and apply at it at streamon time. */ mutex_lock(&sensor->lock); sensor->mode = mode; + + __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate, + mode->pixel_rate, 1, mode->pixel_rate); + *fmt = mode->format; mutex_unlock(&sensor->lock); @@ -1295,6 +1306,9 @@ static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl) return ov5647_s_analogue_gain(sd, ctrl->val); case V4L2_CID_EXPOSURE: return ov5647_s_exposure(sd, ctrl->val); + case V4L2_CID_PIXEL_RATE: + /* Read-only, but we adjust it based on mode. */ + return 0; default: dev_info(&client->dev, "Control (id:0x%x, val:0x%x) not supported\n", @@ -1313,7 +1327,7 @@ static int ov5647_init_controls(struct ov5647 *sensor) { struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd); - v4l2_ctrl_handler_init(&sensor->ctrls, 5); + v4l2_ctrl_handler_init(&sensor->ctrls, 6); v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, V4L2_CID_AUTOGAIN, 0, 1, 1, 0); @@ -1333,17 +1347,29 @@ static int ov5647_init_controls(struct ov5647 *sensor) v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32); - if (sensor->ctrls.error) { - dev_err(&client->dev, "%s Controls initialization failed (%d)\n", - __func__, sensor->ctrls.error); - v4l2_ctrl_handler_free(&sensor->ctrls); + /* By default, PIXEL_RATE is read only, but it does change per mode */ + sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, + V4L2_CID_PIXEL_RATE, + sensor->mode->pixel_rate, + sensor->mode->pixel_rate, 1, + sensor->mode->pixel_rate); + if (!sensor->pixel_rate) + goto handler_free; + sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY; - return sensor->ctrls.error; - } + if (sensor->ctrls.error) + goto handler_free; sensor->sd.ctrl_handler = &sensor->ctrls; return 0; + +handler_free: + dev_err(&client->dev, "%s Controls initialization failed (%d)\n", + __func__, sensor->ctrls.error); + v4l2_ctrl_handler_free(&sensor->ctrls); + + return sensor->ctrls.error; } static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)