| Message ID | 20230401145926.596216-13-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: atomisp: Further sensor rework + exotic features removal | expand |
On Sat, Apr 1, 2023 at 5:00 PM Hans de Goede <hdegoede@redhat.com> wrote: > > Add exposure and gain controls. This allows controlling > the exposure and gain through standard v4l2 IOCTLs. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > .../media/atomisp/i2c/atomisp-gc0310.c | 93 ++++++++++++++++--- > drivers/staging/media/atomisp/i2c/gc0310.h | 7 +- > 2 files changed, 86 insertions(+), 14 deletions(-) > > diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c > index 115493641010..6c0877ab96e3 100644 > --- a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c > +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c > @@ -57,14 +57,64 @@ static int gc0310_write_reg_array(struct i2c_client *client, > return 0; > } > > +static int gc0310_exposure_set(struct gc0310_device *dev, u32 exp) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); > + > + return i2c_smbus_write_word_swapped(client, GC0310_AEC_PK_EXPO_H, exp); > +} > + > +static int gc0310_gain_set(struct gc0310_device *dev, u32 gain) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); > + u8 again, dgain; > + int ret; > + > + /* Taken from original driver, this never sets dgain lower then 32? */ > + > + /* Change 0 - 95 to 32 - 127 */ > + gain += 32; > + > + if (gain < 64) { > + again = 0x0; /* sqrt(2) */ > + dgain = gain; > + } else { > + again = 0x2; /* 2 * sqrt(2) */ > + dgain = gain / 2; > + } > + > + ret = i2c_smbus_write_byte_data(client, GC0310_AGC_ADJ, again); > + if (ret) > + return ret; > + > + ret = i2c_smbus_write_byte_data(client, GC0310_DGC_ADJ, dgain); > + if (ret) > + return ret; > + > + return 0; Can be return i2c_smbus_...; > +} > + > static int gc0310_s_ctrl(struct v4l2_ctrl *ctrl) > { > - int ret = 0; > + struct gc0310_device *dev = > + container_of(ctrl->handler, struct gc0310_device, ctrls.handler); > + int ret; > + > + if (!dev->power_on) > + return 0; > > switch (ctrl->id) { > + case V4L2_CID_EXPOSURE: > + ret = gc0310_exposure_set(dev, ctrl->val); > + break; > + case V4L2_CID_GAIN: > + ret = gc0310_gain_set(dev, ctrl->val); > + break; > default: > ret = -EINVAL; > + break; > } > + > return ret; You can return directly from the switch cases. No need to utilise the ret variable in it. > } > > @@ -83,13 +133,18 @@ static int gc0310_init(struct v4l2_subdev *sd) > /* set initial registers */ > ret = gc0310_write_reg_array(client, gc0310_reset_register, > ARRAY_SIZE(gc0310_reset_register)); > + if (ret) > + goto out_unlock; > > /* restore settings */ > gc0310_res = gc0310_res_preview; > N_RES = N_RES_PREVIEW; > > - mutex_unlock(&dev->input_lock); > + /* restore value of all ctrls */ > + ret = __v4l2_ctrl_handler_setup(&dev->ctrls.handler); > > +out_unlock: > + mutex_unlock(&dev->input_lock); > return ret; > } > > @@ -545,6 +600,26 @@ static const struct v4l2_subdev_ops gc0310_ops = { > .sensor = &gc0310_sensor_ops, > }; > > +static int gc0310_init_controls(struct gc0310_device *dev) > +{ > + struct v4l2_ctrl_handler *hdl = &dev->ctrls.handler; > + > + v4l2_ctrl_handler_init(hdl, 2); > + > + /* Use same lock for controls as for everything else. */ the same (and probably drop the period, since it's one-liner comment) > + hdl->lock = &dev->input_lock; > + dev->sd.ctrl_handler = hdl; > + > + dev->ctrls.exposure = > + v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_EXPOSURE, 0, 4095, 1, 1023); > + > + /* 32 steps at base gain 1 + 64 half steps at base gain 2 */ > + dev->ctrls.gain = > + v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_GAIN, 0, 95, 1, 31); > + > + return hdl->error; > +} > + > static void gc0310_remove(struct i2c_client *client) > { > struct v4l2_subdev *sd = i2c_get_clientdata(client); > @@ -556,7 +631,7 @@ static void gc0310_remove(struct i2c_client *client) > > v4l2_device_unregister_subdev(sd); > media_entity_cleanup(&dev->sd.entity); > - v4l2_ctrl_handler_free(&dev->ctrl_handler); > + v4l2_ctrl_handler_free(&dev->ctrls.handler); > kfree(dev); > } > > @@ -595,21 +670,13 @@ static int gc0310_probe(struct i2c_client *client) > dev->pad.flags = MEDIA_PAD_FL_SOURCE; > dev->format.code = MEDIA_BUS_FMT_SGRBG8_1X8; > dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; > - ret = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0); > + > + ret = gc0310_init_controls(dev); > if (ret) { > gc0310_remove(client); > return ret; > } > > - if (dev->ctrl_handler.error) { > - gc0310_remove(client); > - return dev->ctrl_handler.error; > - } > - > - /* Use same lock for controls as for everything else. */ > - dev->ctrl_handler.lock = &dev->input_lock; > - dev->sd.ctrl_handler = &dev->ctrl_handler; > - > ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); > if (ret) > gc0310_remove(client); > diff --git a/drivers/staging/media/atomisp/i2c/gc0310.h b/drivers/staging/media/atomisp/i2c/gc0310.h > index 540334bc7b0e..c15ca2b807f9 100644 > --- a/drivers/staging/media/atomisp/i2c/gc0310.h > +++ b/drivers/staging/media/atomisp/i2c/gc0310.h > @@ -126,12 +126,17 @@ struct gc0310_device { > struct media_pad pad; > struct v4l2_mbus_framefmt format; > struct mutex input_lock; > - struct v4l2_ctrl_handler ctrl_handler; > > struct camera_sensor_platform_data *platform_data; > struct gc0310_resolution *res; > u8 type; > bool power_on; > + > + struct gc0310_ctrls { > + struct v4l2_ctrl_handler handler; > + struct v4l2_ctrl *exposure; > + struct v4l2_ctrl *gain; > + } ctrls; > }; > > /** > -- > 2.39.1 >
diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c index 115493641010..6c0877ab96e3 100644 --- a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c @@ -57,14 +57,64 @@ static int gc0310_write_reg_array(struct i2c_client *client, return 0; } +static int gc0310_exposure_set(struct gc0310_device *dev, u32 exp) +{ + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); + + return i2c_smbus_write_word_swapped(client, GC0310_AEC_PK_EXPO_H, exp); +} + +static int gc0310_gain_set(struct gc0310_device *dev, u32 gain) +{ + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); + u8 again, dgain; + int ret; + + /* Taken from original driver, this never sets dgain lower then 32? */ + + /* Change 0 - 95 to 32 - 127 */ + gain += 32; + + if (gain < 64) { + again = 0x0; /* sqrt(2) */ + dgain = gain; + } else { + again = 0x2; /* 2 * sqrt(2) */ + dgain = gain / 2; + } + + ret = i2c_smbus_write_byte_data(client, GC0310_AGC_ADJ, again); + if (ret) + return ret; + + ret = i2c_smbus_write_byte_data(client, GC0310_DGC_ADJ, dgain); + if (ret) + return ret; + + return 0; +} + static int gc0310_s_ctrl(struct v4l2_ctrl *ctrl) { - int ret = 0; + struct gc0310_device *dev = + container_of(ctrl->handler, struct gc0310_device, ctrls.handler); + int ret; + + if (!dev->power_on) + return 0; switch (ctrl->id) { + case V4L2_CID_EXPOSURE: + ret = gc0310_exposure_set(dev, ctrl->val); + break; + case V4L2_CID_GAIN: + ret = gc0310_gain_set(dev, ctrl->val); + break; default: ret = -EINVAL; + break; } + return ret; } @@ -83,13 +133,18 @@ static int gc0310_init(struct v4l2_subdev *sd) /* set initial registers */ ret = gc0310_write_reg_array(client, gc0310_reset_register, ARRAY_SIZE(gc0310_reset_register)); + if (ret) + goto out_unlock; /* restore settings */ gc0310_res = gc0310_res_preview; N_RES = N_RES_PREVIEW; - mutex_unlock(&dev->input_lock); + /* restore value of all ctrls */ + ret = __v4l2_ctrl_handler_setup(&dev->ctrls.handler); +out_unlock: + mutex_unlock(&dev->input_lock); return ret; } @@ -545,6 +600,26 @@ static const struct v4l2_subdev_ops gc0310_ops = { .sensor = &gc0310_sensor_ops, }; +static int gc0310_init_controls(struct gc0310_device *dev) +{ + struct v4l2_ctrl_handler *hdl = &dev->ctrls.handler; + + v4l2_ctrl_handler_init(hdl, 2); + + /* Use same lock for controls as for everything else. */ + hdl->lock = &dev->input_lock; + dev->sd.ctrl_handler = hdl; + + dev->ctrls.exposure = + v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_EXPOSURE, 0, 4095, 1, 1023); + + /* 32 steps at base gain 1 + 64 half steps at base gain 2 */ + dev->ctrls.gain = + v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_GAIN, 0, 95, 1, 31); + + return hdl->error; +} + static void gc0310_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); @@ -556,7 +631,7 @@ static void gc0310_remove(struct i2c_client *client) v4l2_device_unregister_subdev(sd); media_entity_cleanup(&dev->sd.entity); - v4l2_ctrl_handler_free(&dev->ctrl_handler); + v4l2_ctrl_handler_free(&dev->ctrls.handler); kfree(dev); } @@ -595,21 +670,13 @@ static int gc0310_probe(struct i2c_client *client) dev->pad.flags = MEDIA_PAD_FL_SOURCE; dev->format.code = MEDIA_BUS_FMT_SGRBG8_1X8; dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; - ret = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0); + + ret = gc0310_init_controls(dev); if (ret) { gc0310_remove(client); return ret; } - if (dev->ctrl_handler.error) { - gc0310_remove(client); - return dev->ctrl_handler.error; - } - - /* Use same lock for controls as for everything else. */ - dev->ctrl_handler.lock = &dev->input_lock; - dev->sd.ctrl_handler = &dev->ctrl_handler; - ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); if (ret) gc0310_remove(client); diff --git a/drivers/staging/media/atomisp/i2c/gc0310.h b/drivers/staging/media/atomisp/i2c/gc0310.h index 540334bc7b0e..c15ca2b807f9 100644 --- a/drivers/staging/media/atomisp/i2c/gc0310.h +++ b/drivers/staging/media/atomisp/i2c/gc0310.h @@ -126,12 +126,17 @@ struct gc0310_device { struct media_pad pad; struct v4l2_mbus_framefmt format; struct mutex input_lock; - struct v4l2_ctrl_handler ctrl_handler; struct camera_sensor_platform_data *platform_data; struct gc0310_resolution *res; u8 type; bool power_on; + + struct gc0310_ctrls { + struct v4l2_ctrl_handler handler; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *gain; + } ctrls; }; /**
Add exposure and gain controls. This allows controlling the exposure and gain through standard v4l2 IOCTLs. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- .../media/atomisp/i2c/atomisp-gc0310.c | 93 ++++++++++++++++--- drivers/staging/media/atomisp/i2c/gc0310.h | 7 +- 2 files changed, 86 insertions(+), 14 deletions(-)