Commit 57801b6a authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

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: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent a75210a6

drivers/media/i2c/ccs/ccs-core.c

+55 −0
Original line number Diff line number Diff line
@@ -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);

		}

	}

	}