Hi Markus,
Thank you for the patch.
On Monday 14 December 2015 15:41:53 Markus Pargmann wrote:
> This patch adds V4L2 controls for Auto Exposure Control and Auto Gain
> Control settings. These settings include low pass filter, update
> frequency of these settings and the update interval for those units.
>
> Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
Please see below for a few comments. If you agree about them there's no need
to resubmit, I'll fix the patch when applying.
> ---
> drivers/media/i2c/mt9v032.c | 153 ++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 152 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
> index cc16acf001de..6cbc3b87eda9 100644
> --- a/drivers/media/i2c/mt9v032.c
> +++ b/drivers/media/i2c/mt9v032.c
[snip]
> enum mt9v032_model {
> @@ -162,6 +169,8 @@ struct mt9v032_model_data {
> unsigned int min_shutter;
> unsigned int max_shutter;
> unsigned int pclk_reg;
> + unsigned int aec_max_shutter_reg;
> + const struct v4l2_ctrl_config * const aec_max_shutter_v4l2_ctrl;
> };
>
> struct mt9v032_model_info {
> @@ -175,6 +184,9 @@ static const struct mt9v032_model_version
> mt9v032_versions[] = { { MT9V034_CHIP_ID_REV1, "MT9V024/MT9V034 rev1" },
> };
>
> +static const struct v4l2_ctrl_config mt9v032_aec_max_shutter_width;
> +static const struct v4l2_ctrl_config mt9v034_aec_max_shutter_width;
We can avoid forward declarations by moving the mt9v032_model_data array
further down in the driver.
> static const struct mt9v032_model_data mt9v032_model_data[] = {
> {
> /* MT9V022, MT9V032 revisions 1/2/3 */
[snip]
> @@ 647,6 +663,33 @@ static int mt9v032_set_selection(struct v4l2_subdev
> *subdev, */
>
> #define V4L2_CID_TEST_PATTERN_COLOR (V4L2_CID_USER_BASE | 0x1001)
> +/*
> + * Value between 1 and 64 to set the desired bin. This is effectively a
> measure + * of how bright the image is supposed to be. Both AGC and AEC try
> to reach + * this.
> + */
> +#define V4L2_CID_AEGC_DESIRED_BIN (V4L2_CID_USER_BASE | 0x1002)
> +/*
> + * LPF is the low pass filter capability of the chip. Both AEC and AGC have
> + * this setting. This limits the speed in which AGC/AEC adjust their
> settings.
> + * Possible values are 0-2. 0 means no LPF. For 1 and 2 this equation is
> used:
> + * if |(Calculated new exp - current exp)| > (current exp / 4)
> + * next exp = Calculated new exp
> + * else
> + * next exp = Current exp + ((Calculated new exp - current exp) /
2^LPF)
Over 80 columns, you can fix it by just reducing the indentation by one tab.
> + */
> +#define V4L2_CID_AEC_LPF (V4L2_CID_USER_BASE | 0x1003)
> +#define V4L2_CID_AGC_LPF (V4L2_CID_USER_BASE | 0x1004)
> +/*
> + * Value between 0 and 15. This is the number of frames being skipped
> before
> + * updating the auto exposure/gain.
> + */
> +#define V4L2_CID_AEC_UPDATE_INTERVAL (V4L2_CID_USER_BASE | 0x1005)
> +#define V4L2_CID_AGC_UPDATE_INTERVAL (V4L2_CID_USER_BASE | 0x1006)
> +/*
> + * Maximum shutter width used for AEC.
> + */
> +#define V4L2_CID_AEC_MAX_SHUTTER_WIDTH (V4L2_CID_USER_BASE | 0x1007)
[snip]
> @@ -745,6 +810,84 @@ static const struct v4l2_ctrl_config
> mt9v032_test_pattern_color = { .flags = 0,
> };
>
> +static const struct v4l2_ctrl_config mt9v032_aegc_controls[] = {
> + {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AEGC_DESIRED_BIN,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "aec_agc_desired_bin",
I forgot to reply to your e-mail asking what proper controls names would be,
sorry.
V4L2 control names contain spaces and use uppercase as needed. This one could
be "AEC/AGC Desired Bin" for instance.
> + .min = 1,
> + .max = 64,
> + .step = 1,
> + .def = 58,
> + .flags = 0,
> + }, {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AEC_LPF,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "aec_lpf",
> + .min = 0,
> + .max = 2,
> + .step = 1,
> + .def = 0,
> + .flags = 0,
> + }, {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AGC_LPF,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "agc_lpf",
> + .min = 0,
> + .max = 2,
> + .step = 1,
> + .def = 2,
> + .flags = 0,
> + }, {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AEC_UPDATE_INTERVAL,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "aec_update_interval",
> + .min = 0,
> + .max = 16,
> + .step = 1,
> + .def = 2,
> + .flags = 0,
> + }, {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AGC_UPDATE_INTERVAL,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "agc_update_interval",
> + .min = 0,
> + .max = 16,
> + .step = 1,
> + .def = 2,
> + .flags = 0,
> + }
> +};
> +
> +static const struct v4l2_ctrl_config mt9v032_aec_max_shutter_width = {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AEC_MAX_SHUTTER_WIDTH,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "aec_max_shutter_width",
> + .min = 1,
> + .max = MT9V032_TOTAL_SHUTTER_WIDTH_MAX,
According the the MT9V032 datasheet I have, the maximum value is 2047 while
MT9V032_TOTAL_SHUTTER_WIDTH_MAX is defined as 32767. Do you have any
information that would hint for an error in the datasheet ?
> + .step = 1,
> + .def = MT9V032_TOTAL_SHUTTER_WIDTH_DEF,
> + .flags = 0,
> +};
> +
> +static const struct v4l2_ctrl_config mt9v034_aec_max_shutter_width = {
> + .ops = &mt9v032_ctrl_ops,
> + .id = V4L2_CID_AEC_MAX_SHUTTER_WIDTH,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "aec_max_shutter_width",
> + .min = 1,
> + .max = MT9V034_TOTAL_SHUTTER_WIDTH_MAX,
> + .step = 1,
> + .def = MT9V032_TOTAL_SHUTTER_WIDTH_DEF,
> + .flags = 0,
> +};
[snip]
--
Regards,
Laurent Pinchart
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