From 57801b6aa72bee123503fc4630ef4da1b88fca00 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Thu, 24 Sep 2020 00:55:00 +0200 Subject: [PATCH] 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/ccs/ccs-core.c | 55 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c index c511973..7591a52 100644 --- a/drivers/media/i2c/ccs/ccs-core.c +++ b/drivers/media/i2c/ccs/ccs-core.c @@ -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) { @@ -820,6 +831,50 @@ static int ccs_init_controls(struct ccs_sensor *sensor) 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); + } + } } if (CCS_LIM(sensor, DIGITAL_GAIN_CAPABILITY) == -- 2.7.4