On 01/20/2017 06:48 AM, Hans Verkuil wrote:
On 01/07/2017 03:11 AM, Steve Longerbeam wrote:+ + /* cached control settings */ + int ctrl_cache[OV5640_MAX_CONTROLS];This is just duplicating the cached value in the control framework. I think this can be dropped.
done, see below.
+ +static struct ov5640_control ov5640_ctrls[] = { + { + .set = ov5640_set_agc, + .ctrl = { + .id = V4L2_CID_AUTOGAIN, + .name = "Auto Gain/Exposure Control", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1, + .type = V4L2_CTRL_TYPE_BOOLEAN, + }, + }, { + .set = ov5640_set_exposure, + .ctrl = { + .id = V4L2_CID_EXPOSURE, + .name = "Exposure", + .minimum = 0, + .maximum = 65535, + .step = 1, + .default_value = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, { + .set = ov5640_set_gain, + .ctrl = { + .id = V4L2_CID_GAIN, + .name = "Gain", + .minimum = 0, + .maximum = 1023, + .step = 1, + .default_value = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, { + .set = ov5640_set_hue, + .ctrl = { + .id = V4L2_CID_HUE, + .name = "Hue", + .minimum = 0, + .maximum = 359, + .step = 1, + .default_value = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, { + .set = ov5640_set_contrast, + .ctrl = { + .id = V4L2_CID_CONTRAST, + .name = "Contrast", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, { + .set = ov5640_set_saturation, + .ctrl = { + .id = V4L2_CID_SATURATION, + .name = "Saturation", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = 64, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, { + .set = ov5640_set_awb, + .ctrl = { + .id = V4L2_CID_AUTO_WHITE_BALANCE, + .name = "Auto White Balance", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1, + .type = V4L2_CTRL_TYPE_BOOLEAN, + }, + }, { + .set = ov5640_set_red_balance, + .ctrl = { + .id = V4L2_CID_RED_BALANCE, + .name = "Red Balance", + .minimum = 0, + .maximum = 4095, + .step = 1, + .default_value = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, { + .set = ov5640_set_blue_balance, + .ctrl = { + .id = V4L2_CID_BLUE_BALANCE, + .name = "Blue Balance", + .minimum = 0, + .maximum = 4095, + .step = 1, + .default_value = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + }, + }, +}; +#define OV5640_NUM_CONTROLS ARRAY_SIZE(ov5640_ctrls)This should use v4l2_ctrl_new_std() instead of this array. Just put a switch on ctrl->id in s_ctrl, and each case calls the corresponding set function.
In this case, because there are lots of controls, my preference is to use table lookup rather than a large switch statement. However I did remove .name and .type from the table entries, leaving only .def, .min, .max, .stepas required to pass to v4l2_ctrl_new_std(). Also converted to 'struct v4l2_ctrl_config'
in the table.
+ +static int ov5640_restore_ctrls(struct ov5640_dev *sensor) +{ + struct ov5640_control *c; + int i; + + for (i = 0; i < OV5640_NUM_CONTROLS; i++) { + c = &ov5640_ctrls[i]; + c->set(sensor, sensor->ctrl_cache[i]); + } + + return 0; +}This does the same as v4l2_ctrl_handler_setup() if I understand the code correctly.
yes thanks. I remember looking at this and thinking v4l2_ctrl_handler_setup() was setting up the default values rather than the current values, but after a re-read it does look to be restoring the current values, which is exactly what
is needed here.
+ +static int ov5640_init_controls(struct ov5640_dev *sensor) +{ + struct ov5640_control *c; + int i; + + v4l2_ctrl_handler_init(&sensor->ctrl_hdl, OV5640_NUM_CONTROLS); + + for (i = 0; i < OV5640_NUM_CONTROLS; i++) { + c = &ov5640_ctrls[i]; + + v4l2_ctrl_new_std(&sensor->ctrl_hdl, &ov5640_ctrl_ops, + c->ctrl.id, c->ctrl.minimum, c->ctrl.maximum, + c->ctrl.step, c->ctrl.default_value); + }As mentioned, just drop the ov5640_ctrls array and call v4l2_ctr_new_std for each control you're adding.
if really pressed I can be persuaded to use a switch statement and call v4l2_ctrl_new_std() multiple times, but I don't any problem with using a table.
+ +module_i2c_driver(ov5640_i2c_driver); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>"); +MODULE_DESCRIPTION("OV5640 MIPI Camera Subdev Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("1.0");Same comments apply to the next patch, so I won't repeat them.
done, I've made the same mods to the ov5642 subdev. Steve _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
