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4 changed files with 29 additions and 68 deletions

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@ -102,23 +102,7 @@ The AE controls realays in the feedback provided by the Driver's camera sensor t
and the custom DTSIs with the sensor parameters definitions.
As the AE has interdependency with the digital gain. This gain it's and operation on the Driver, and follows this setup:
```bash
/*
* Digital gain equation:
*
* RANGE: 1x, 7.97x
* STEPS: 1/32
*
* SCALE FACTOR = 3
*
* min_gain_val = 102
* max_gain_val = 160
* gain_factor = 3
*
* gain accepts mapping to range 32 - 53
*/
```
MT9M021 sensor datasheet:
MT9M021 sensor datasheet:
* <a href="https://files.niemo.de/aptina_pdfs/MT9M021-M031_Developer_Guide.pdf">MT9M021 Developer Guide</a>

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@ -93,18 +93,18 @@ i2c8 = "/i2c@31e0000";
csi_pixel_bit_depth = "12";
mode_type = "bayer";
pixel_phase = "rggb";
readout_orientation = "0";
readout_orientation = "0";
line_length = "1650";
inherent_gain = "1";
pix_clk_hz = "74250000";
gain_factor = "3";
gain_factor = "3125";
framerate_factor = "1000000";
exposure_factor = "1000000";
min_gain_val = "102";
max_gain_val = "160";
min_gain_val = "100000"; /* 1x */
max_gain_val = "796875"; /* 7.97x */
step_gain_val = "1";
default_gain = "102";
default_gain = "100000"; /* 1x */
min_hdr_ratio = "1";
max_hdr_ratio = "1";
@ -132,18 +132,18 @@ i2c8 = "/i2c@31e0000";
csi_pixel_bit_depth = "12";
mode_type = "bayer";
pixel_phase = "rggb";
readout_orientation = "0";
readout_orientation = "0";
line_length = "1650";
inherent_gain = "1";
pix_clk_hz = "74250000";
gain_factor = "3";
gain_factor = "3125";
framerate_factor = "1000000";
exposure_factor = "1000000";
min_gain_val = "102";
max_gain_val = "160";
min_gain_val = "100000"; /* 1x */
max_gain_val = "796875"; /* 7.97x */
step_gain_val = "1";
default_gain = "102";
default_gain = "100000"; /* 1x */
min_hdr_ratio = "1";
max_hdr_ratio = "1";
@ -220,18 +220,18 @@ i2c8 = "/i2c@31e0000";
csi_pixel_bit_depth = "12";
mode_type = "bayer";
pixel_phase = "rggb";
readout_orientation = "0";
readout_orientation = "0";
line_length = "1650";
inherent_gain = "1";
pix_clk_hz = "74250000";
gain_factor = "3";
gain_factor = "3125";
framerate_factor = "1000000";
exposure_factor = "1000000";
min_gain_val = "102";
max_gain_val = "160" ;
min_gain_val = "100000"; /* 1x */
max_gain_val = "796875"; /* 7.97x */
step_gain_val = "1";
default_gain = "102";
default_gain = "100000"; /* 1x */
min_hdr_ratio = "1";
max_hdr_ratio = "1";
@ -259,18 +259,18 @@ i2c8 = "/i2c@31e0000";
csi_pixel_bit_depth = "12";
mode_type = "bayer";
pixel_phase = "rggb";
readout_orientation = "0";
readout_orientation = "0";
line_length = "1650";
inherent_gain = "1";
pix_clk_hz = "74250000";
gain_factor = "3";
gain_factor = "3125";
framerate_factor = "1000000";
exposure_factor = "1000000";
min_gain_val = "102";
max_gain_val = "160";
min_gain_val = "100000"; /* 1x */
max_gain_val = "796875"; /* 7.97x */
step_gain_val = "1";
default_gain = "102";
default_gain = "100000"; /* 1x */
min_hdr_ratio = "1";
max_hdr_ratio = "1";

View File

@ -397,49 +397,26 @@ static int mt9m021_set_gain(struct tegracam_device *tc_dev, s64 val)
struct camera_common_data *s_data = tc_dev->s_data;
struct device *dev = tc_dev->dev;
int err = 0;
u16 gain_mul;
u16 reg16 = 0;
u64 gain = 0;
dev_dbg(dev, "Setting Gain to: %lld", val);
if (val >= MT9M021_GAIN_8X_FIXED) {
gain_mul = MT9M021_GAIN_8X;
} else if (val >= MT9M021_GAIN_4X_FIXED) {
gain_mul = MT9M021_GAIN_4X;
} else if (val >= MT9M021_GAIN_2X_FIXED) {
gain_mul = MT9M021_GAIN_2X;
} else {
gain_mul = MT9M021_GAIN_1X;
}
/*
* Digital gain equation:
*
* RANGE: 1x, 7.97x
* STEPS: 1/32
*
* gain accepts mapping from range 32 - 255
*
* SCALE FACTOR = 3
*
* min_gain_val = 102
* max_gain_val = 160
* min_gain_val = 96
* max_gain_val = 765
* gain_factor = 3
*
* gain accepts mapping to range 32 - 53
*/
gain = val / 3;
/* Update analog gain multiplier */
err = mt9m021_read_reg16(s_data, MT9M021_DIGITAL_TEST, &reg16);
if (err)
goto exit;
reg16 =
(reg16 & ~MT9M021_ANALOG_GAIN_MASK) |
((gain_mul << MT9M021_ANALOG_GAIN_SHIFT) &
MT9M021_ANALOG_GAIN_MASK);
err = mt9m021_write_reg16(s_data, MT9M021_DIGITAL_TEST, reg16);
if (err)
goto exit;
gain = val / 3125;
/* Update global gain */
err = mt9m021_write_reg16(s_data, MT9M021_GLOBAL_GAIN, gain);

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@ -5,7 +5,7 @@ initial_exposure_time=0
while true; do sleep 0.5;
# Read center camera controls
echo `v4l2-ctl -d /dev/video1 --get-ctrl=gain --get-ctrl=exposure` > controls
echo `v4l2-ctl -d /dev/video0 --get-ctrl=gain --get-ctrl=exposure` > controls
awk '{print $2}' controls > get_control
actual_gain=`cat get_control`
awk '{print $4}' controls > get_control
@ -18,10 +18,10 @@ while true; do sleep 0.5;
rm controls get_control
# Set R/L camera controls manually
if [ $actual_gain -ne $initial_gain ]; then
v4l2-ctl -d /dev/video0 --set-ctrl=gain=$actual_gain
v4l2-ctl -d /dev/video1 --set-ctrl=gain=$actual_gain
fi
if [ $actual_exposure_time -ne $initial_exposure_time ]; then
v4l2-ctl -d /dev/video0 --set-ctrl=exposure=$actual_exposure_time
v4l2-ctl -d /dev/video1 --set-ctrl=exposure=$actual_exposure_time
fi
# Define new initial value
initial_gain=$actual_gain