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media: ccs: Add support for alternate analogue global gain 

The CCS spec defines an alternative implementation for global analogue
gain. Add support for that in the driver.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Sakari Ailus 2020-09-24 00:55:00 +02:00 committed by Mauro Carvalho Chehab
parent a75210a62b
commit 57801b6aa7
1 changed files with 55 additions and 0 deletions
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55
drivers/media/i2c/ccs/ccs-core.c
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@ -673,6 +673,17 @@ static int ccs_set_ctrl(struct v4l2_ctrl *ctrl)
break;
case V4L2_CID_CCS_ANALOGUE_LINEAR_GAIN:
rval = ccs_write(sensor, ANALOG_LINEAR_GAIN_GLOBAL, ctrl->val);
break;
case V4L2_CID_CCS_ANALOGUE_EXPONENTIAL_GAIN:
rval = ccs_write(sensor, ANALOG_EXPONENTIAL_GAIN_GLOBAL,
ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
if (CCS_LIM(sensor, DIGITAL_GAIN_CAPABILITY) ==
CCS_DIGITAL_GAIN_CAPABILITY_GLOBAL) {
@ -819,6 +830,50 @@ static int ccs_init_controls(struct ccs_sensor *sensor)
max(CCS_LIM(sensor, ANALOG_GAIN_CODE_STEP),
1U),
CCS_LIM(sensor, ANALOG_GAIN_CODE_MIN));
}
break;
case CCS_ANALOG_GAIN_CAPABILITY_ALTERNATE_GLOBAL: {
struct {
const char *name;
u32 id;
u16 min, max, step;
} const gain_ctrls[] = {
{
"Analogue Linear Gain",
V4L2_CID_CCS_ANALOGUE_LINEAR_GAIN,
CCS_LIM(sensor, ANALOG_LINEAR_GAIN_MIN),
CCS_LIM(sensor, ANALOG_LINEAR_GAIN_MAX),
max(CCS_LIM(sensor,
ANALOG_LINEAR_GAIN_STEP_SIZE),
1U),
},
{
"Analogue Exponential Gain",
V4L2_CID_CCS_ANALOGUE_EXPONENTIAL_GAIN,
CCS_LIM(sensor, ANALOG_EXPONENTIAL_GAIN_MIN),
CCS_LIM(sensor, ANALOG_EXPONENTIAL_GAIN_MAX),
max(CCS_LIM(sensor,
ANALOG_EXPONENTIAL_GAIN_STEP_SIZE),
1U),
},
};
struct v4l2_ctrl_config ctrl_cfg = {
.type = V4L2_CTRL_TYPE_INTEGER,
.ops = &ccs_ctrl_ops,
};
unsigned int i;
for (i = 0; i < ARRAY_SIZE(gain_ctrls); i++) {
ctrl_cfg.name = gain_ctrls[i].name;
ctrl_cfg.min = ctrl_cfg.def = gain_ctrls[i].min;
ctrl_cfg.max = gain_ctrls[i].max;
ctrl_cfg.step = gain_ctrls[i].step;
ctrl_cfg.id = gain_ctrls[i].id;
v4l2_ctrl_new_custom(&sensor->pixel_array->ctrl_handler,
&ctrl_cfg, NULL);
}
}
}