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/linux/drivers/media/usb/gspca/
H A Dautogain_functions.c3 * Functions for auto gain.
9 /* auto gain and exposure algorithm based on the knee algorithm described here:
12 Returns 0 if no changes were made, 1 if the gain and or exposure settings
22 s32 gain, orig_gain, exposure, orig_exposure; in gspca_expo_autogain() local
28 orig_gain = gain = v4l2_ctrl_g_ctrl(gspca_dev->gain); in gspca_expo_autogain()
40 if (gain > gain_knee) in gspca_expo_autogain()
41 gain--; in gspca_expo_autogain()
44 else if (gain > gspca_dev->gain->default_value) in gspca_expo_autogain()
45 gain--; in gspca_expo_autogain()
48 else if (gain > gspca_dev->gain->minimum) in gspca_expo_autogain()
[all …]
/linux/sound/soc/codecs/
H A Des83xx-dsm-common.h158 /* Volume - Gain */
159 #define LINEIN_GAIN_0db 0x00 /* gain = 0db */
160 #define LINEIN_GAIN_3db 0x01 /* gain = +3db */
161 #define LINEIN_GAIN_6db 0x02 /* gain = +6db */
162 #define LINEIN_GAIN_9db 0x03 /* gain = +9db */
163 #define LINEIN_GAIN_12db 0x04 /* gain = +12db */
164 #define LINEIN_GAIN_15db 0x05 /* gain = +15db */
165 #define LINEIN_GAIN_18db 0x06 /* gain = +18db */
166 #define LINEIN_GAIN_21db 0x07 /* gain = +21db */
167 #define LINEIN_GAIN_24db 0x08 /* gain = +24db */
[all …]
H A Dmax9759.c22 unsigned int gain; member
48 ucontrol->value.integer.value[0] = priv->gain; in speaker_gain_control_get()
71 priv->gain = ucontrol->value.integer.value[0]; in speaker_gain_control_put()
75 speaker_gain_table[priv->gain][0]); in speaker_gain_control_put()
78 speaker_gain_table[priv->gain][1]); in speaker_gain_control_put()
108 SOC_SINGLE_EXT_TLV("Speaker Gain Volume", 0, 0, 3, 0,
162 priv->gpiod_gain = devm_gpiod_get_array(dev, "gain", GPIOD_OUT_HIGH); in max9759_probe()
165 "Failed to get 'gain' gpios"); in max9759_probe()
166 priv->gain = 0; in max9759_probe()
169 dev_err(dev, "Invalid 'gain' gpio in max9759_probe()
[all...]
/linux/drivers/iio/
H A Dindustrialio-gts-helper.c2 /* gain-time-scale conversion helpers for IIO light sensors
22 * iio_gts_get_gain - Convert scale to total gain
24 * Internal helper for converting scale to total gain.
29 * @scale: Linearized scale to compute the gain for.
31 * Return: (floored) gain corresponding to the scale. -EINVAL if scale
45 * gain_get_scale_fraction - get the gain or time based on scale and known one
50 * @scale: Linearized scale to compute the gain/time for.
51 * @known: Either integration time or gain depending on which one is known
52 * @unknown: Pointer to variable where the computed gain/time is stored
54 * Internal helper for computing unknown fraction of total gain.
[all …]
/linux/sound/soc/mediatek/mt8186/
H A Dmt8186-dai-hw-gain.c3 // MediaTek ALSA SoC Audio DAI HW Gain Control
12 #define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
13 #define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"
58 /* let hw gain ramp up, set cur gain to 0 */ in mtk_hw_gain_event()
61 /* set target gain to 0 */ in mtk_hw_gain_event()
96 SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
97 SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
98 SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
102 {"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
103 {"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
[all …]
/linux/drivers/iio/amplifiers/
H A Dhmc425a.c3 * HMC425A and similar Gain Amplifiers
26 * The LTC6373 amplifier supports configuring gain using GPIO's with the following
30 * From here, it is observed that all values are multiples of the '2' gain setting,
56 int (*gain_dB_to_code)(int gain, int *code);
64 u32 gain; member
71 int gain; in gain_dB_to_code() local
74 gain = (val * 1000) - (val2 / 1000); in gain_dB_to_code()
76 gain = (val * 1000) + (val2 / 1000); in gain_dB_to_code()
78 if (gain > inf->gain_max || gain < inf->gain_min) in gain_dB_to_code()
83 return st->chip_info->gain_dB_to_code(gain, code); in gain_dB_to_code()
[all …]
H A DKconfig3 # Gain Amplifiers, etc.
10 tristate "Analog Devices AD8366 and similar Gain Amplifiers"
16 gain amplifiers. This driver supports the following gain amplifiers
18 AD8366 Dual-Digital Variable Gain Amplifier (VGA)
19 ADA4961 BiCMOS RF Digital Gain Amplifier (DGA)
20 ADL5240 Digitally controlled variable gain amplifier (VGA)
60 tristate "Analog Devices HMC425A and similar GPIO Gain Amplifiers"
64 gain amplifiers or step attenuators.
H A Dad8366.c3 * AD8366 and similar Gain Amplifiers
4 * This driver supports the following gain amplifiers:
5 * AD8366 Dual-Digital Variable Gain Amplifier (VGA)
6 * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA)
7 * ADL5240 Digitally controlled variable gain amplifier (VGA)
215 int code, gain = 0; in ad8366_read_raw() local
221 gain = inf->gain_step > 0 ? inf->gain_min : inf->gain_max; in ad8366_read_raw()
222 gain += inf->gain_step * code; in ad8366_read_raw()
224 *val = gain / 1000; in ad8366_read_raw()
225 *val2 = (gain % 1000) * 1000; in ad8366_read_raw()
[all …]
/linux/Documentation/userspace-api/media/v4l/
H A Dext-ctrls-rf-tuner.rst51 Enables/disables LNA automatic gain control (AGC)
54 Enables/disables mixer automatic gain control (AGC)
57 Enables/disables IF automatic gain control (AGC)
62 LNA gain and the RF gain in this document is that the LNA gain is
63 integrated in the tuner chip while the RF gain is a separate chip.
64 There may be both RF and LNA gain controls in the same device. The
68 LNA (low noise amplifier) gain is first gain stage on the RF tuner
71 ``V4L2_CID_RF_TUNER_RF_GAIN`` to understand how RF gain and LNA gain
76 Mixer gain is second gain stage on the RF tuner signal path. It is
82 IF gain is last gain stage on the RF tuner signal path. It is
H A Dext-ctrls-image-source.rst37 Analogue gain is gain affecting all colour components in the pixel
38 matrix. The gain operation is performed in the analogue domain
85 control taking 4 gain values, being the gains for each of the
92 The units for the gain values are linear, with the default value
93 representing a gain of exactly 1.0. For example, if this default value
95 a gain of exactly 1.5.
/linux/drivers/iio/test/
H A Diio-test-gts.c2 /* Unit tests for IIO light sensor gain-time-scale helpers
73 /* Keep the gain and time tables unsorted to test the sorting */
161 /* Ok times, negative gain */ in test_init_iio_gts_invalid()
167 /* gain * time overflow int */ in test_init_iio_gts_invalid()
186 * Meas time 100 => gain by time 2x in test_iio_gts_find_gain_for_scale_using_time()
187 * TEST_SCALE_8X matches total gain 8x in test_iio_gts_find_gain_for_scale_using_time()
196 * Meas time 200 => gain by time 4x in test_iio_gts_find_gain_for_scale_using_time()
197 * TEST_SCALE_256X matches total gain 256x in test_iio_gts_find_gain_for_scale_using_time()
203 /* Min time, Min gain */ in test_iio_gts_find_gain_for_scale_using_time()
209 /* Max time, Max gain */ in test_iio_gts_find_gain_for_scale_using_time()
[all …]
/linux/drivers/net/wireless/broadcom/b43/
H A Dphy_n.h28 #define B43_NPHY_C1_CGAINI B43_PHY_N(0x01C) /* Core 1 compute gain info */
29 #define B43_NPHY_C1_CGAINI_GAINBKOFF 0x001F /* Gain backoff */
31 #define B43_NPHY_C1_CGAINI_CLIPGBKOFF 0x03E0 /* Clip gain backoff */
33 #define B43_NPHY_C1_CGAINI_GAINSTEP 0x1C00 /* Gain step */
36 #define B43_NPHY_C1_CCK_CGAINI B43_PHY_N(0x01D) /* Core 1 CCK compute gain info */
37 #define B43_NPHY_C1_CCK_CGAINI_GAINBKOFF 0x001F /* Gain backoff */
38 #define B43_NPHY_C1_CCK_CGAINI_CLIPGBKOFF 0x01E0 /* CCK barely clip gain backoff */
39 #define B43_NPHY_C1_MINMAX_GAIN B43_PHY_N(0x01E) /* Core 1 min/max gain */
40 #define B43_NPHY_C1_MINGAIN 0x00FF /* Minimum gain */
42 #define B43_NPHY_C1_MAXGAIN 0xFF00 /* Maximum gain */
[all …]
/linux/drivers/iio/accel/
H A Dst_accel_core.c156 .gain = IIO_G_TO_M_S_2(1000),
161 .gain = IIO_G_TO_M_S_2(2000),
166 .gain = IIO_G_TO_M_S_2(4000),
171 .gain = IIO_G_TO_M_S_2(12000),
235 .gain = IIO_G_TO_M_S_2(1000),
240 .gain = IIO_G_TO_M_S_2(2000),
245 .gain = IIO_G_TO_M_S_2(3900),
319 .gain = IIO_G_TO_M_S_2(61),
324 .gain = IIO_G_TO_M_S_2(122),
329 .gain = IIO_G_TO_M_S_2(183),
[all …]
/linux/Documentation/userspace-api/media/drivers/
H A Dccs.rst69 Analogue gain model
72 The CCS defines an analogue gain model where the gain can be calculated using
75 gain = m0 * x + c0 / (m1 * x + c1)
85 The analogue gain (``x`` in the formula) is controlled through
88 Alternate analogue gain model
91 The CCS defines another analogue gain model called alternate analogue gain. In
92 this case, the formula to calculate actual gain consists of linear and
95 gain = linear * 2 ^ exponent
/linux/drivers/comedi/drivers/
H A Ddt2811.c28 * - A/D ranges are not programmable but the gain is. The AI subdevice has
29 * a range_table containing all the possible analog input range/gain
31 * your board configuration and the desired gain to correctly convert
33 * gain.
57 #define DT2811_ADGCR_REG 0x01 /* r/w A/D Gain/Channel */
105 * The gain may be set to 1, 2, 4, or 8 (on the dt2811-pgh) or to
110 BIP_RANGE(5), /* range 0: gain=1 */
111 BIP_RANGE(2.5), /* range 1: gain=2 */
112 BIP_RANGE(1.25), /* range 2: gain=4 */
113 BIP_RANGE(0.625), /* range 3: gain=8 */
[all …]
/linux/sound/spi/
H A Dat73c213.h22 /* DAC left line in gain register */
26 /* DAC right line in gain register */
30 /* DAC Left Master Playback Gain Register */
34 /* DAC Right Master Playback Gain Register */
38 /* DAC Left Line Out Gain Register */
42 /* DAC Right Line Out Gain Register */
85 /* DAC Auxiliary Input Gain Control Register */
/linux/drivers/iio/magnetometer/
H A Dst_magn_core.c179 .gain = 1100,
185 .gain = 855,
191 .gain = 670,
197 .gain = 450,
203 .gain = 400,
209 .gain = 330,
215 .gain = 230,
258 .gain = 909,
264 .gain = 1169,
270 .gain = 1492,
[all …]
/linux/Documentation/devicetree/bindings/iio/dac/
H A Dadi,ad3552r.yaml99 adi,gain-offset:
100 description: Gain offset used in the above formula
105 adi,gain-scaling-p:
106 description: GainP = 1 / ( 2 ^ adi,gain-scaling-p)
110 adi,gain-scaling-n:
111 description: GainN = 1 / ( 2 ^ adi,gain-scaling-n)
119 - adi,gain-offset
120 - adi,gain-scaling-p
121 - adi,gain-scaling-n
240 adi,gain-offset = <5>;
[all …]
/linux/sound/mips/
H A Dad1843.c37 ad1843_RIG = { 2, 0, 4 }, /* Right ADC Input Gain */
38 ad1843_RMGE = { 2, 4, 1 }, /* Right ADC Mic Gain Enable */
40 ad1843_LIG = { 2, 8, 4 }, /* Left ADC Input Gain */
41 ad1843_LMGE = { 2, 12, 1 }, /* Left ADC Mic Gain Enable */
43 ad1843_RD2M = { 3, 0, 5 }, /* Right DAC 2 Mix Gain/Atten */
45 ad1843_LD2M = { 3, 8, 5 }, /* Left DAC 2 Mix Gain/Atten */
47 ad1843_RX1M = { 4, 0, 5 }, /* Right Aux 1 Mix Gain/Atten */
49 ad1843_LX1M = { 4, 8, 5 }, /* Left Aux 1 Mix Gain/Atten */
51 ad1843_RX2M = { 5, 0, 5 }, /* Right Aux 2 Mix Gain/Atten */
53 ad1843_LX2M = { 5, 8, 5 }, /* Left Aux 2 Mix Gain/Atten */
[all …]
/linux/drivers/media/dvb-frontends/
H A Dstv6111.c36 /* Gain *100dB // Reg */
72 /* Gain *100dB // reg */
108 /* Gain *100dB // reg */
168 /* Gain *100dB // reg */
227 /* Gain *100dB // reg */
535 s32 gain; in table_lookup() local
543 gain = table[0].value; in table_lookup()
545 gain = table[imax].value; in table_lookup()
556 gain = table[imin].value; in table_lookup()
558 gain += ((s32)(reg_value - table[imin].reg_value) * in table_lookup()
[all …]
/linux/drivers/media/usb/gspca/stv06xx/
H A Dstv06xx_pb0100.h41 #define PB_EXPGAIN 0x0e /* Exposure Gain Command */
70 #define PB_G1GAIN 0x2b /* Green 1 Gain */
71 #define PB_BGAIN 0x2c /* Blue Gain */
72 #define PB_RGAIN 0x2d /* Red Gain */
73 #define PB_G2GAIN 0x2e /* Green 2 Gain */
78 #define PB_ADCMAXGAIN 0x33 /* Maximum Gain */
79 #define PB_ADCMINGAIN 0x34 /* Minimum Gain */
80 #define PB_ADCGLOBALGAIN 0x35 /* Global Gain */
91 #define PB_R64 0x40 /* Red/Blue Gain */
92 #define PB_R65 0x41 /* Green 2/Green 1 Gain */
/linux/include/linux/
H A Datmel-isc-media.h13 * 4 gain controls, sliders, for each of the BAYER components: R, B, GR, GB.
30 * configure the gain/offsets directly.
40 /* Red component gain control */
42 /* Blue component gain control */
44 /* Green Red component gain control */
46 /* Green Blue gain control */
/linux/Documentation/devicetree/bindings/iio/light/
H A Dupisemi,us5182.yaml33 upisemi,upper-dark-gain:
36 8-bit dark gain compensation factor(4 int and 4 fractional bits - Q4.4)
40 upisemi,lower-dark-gain:
43 8-bit dark gain compensation factor(4 int and 4 fractional bits - Q4.4)
74 upisemi,upper-dark-gain = /bits/ 8 <0x00>;
75 upisemi,lower-dark-gain = /bits/ 8 <0x16>;
/linux/Documentation/ABI/testing/
H A Dsysfs-bus-iio-isl295016 This sensor has an automatic gain control (agc) loop
8 level by controlling programmable gain amplifiers. The
9 criteria for optimal gain is determined by the sensor.
11 Return the actual gain value as an integer in [0; 65536]
14 The agc gain read when measuring crosstalk shall be
/linux/include/linux/mfd/
H A Dac100.h84 /* ADC digital audio processing (high pass filter & auto gain control */
116 #define AC100_DAC_DAP_H_G_D_T_C 0xa7 /* High Gain Delay Time Coef */
117 #define AC100_DAC_DAP_L_G_D_T_C 0xa8 /* Low Gain Delay Time Coef */
118 #define AC100_DAC_DAP_H_G_A_T_C 0xa9 /* High Gain Attack Time Coef */
119 #define AC100_DAC_DAP_L_G_A_T_C 0xaa /* Low Gain Attack Time Coef */
122 #define AC100_DAC_DAP_H_G_K 0xad /* High Gain K parameter */
123 #define AC100_DAC_DAP_L_G_K 0xae /* Low Gain K parameter */
124 #define AC100_DAC_DAP_H_G_OFF 0xaf /* High Gain offset */
125 #define AC100_DAC_DAP_L_G_OFF 0xb0 /* Low Gain offset */

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