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130 lines
4.6 KiB
130 lines
4.6 KiB
From 9f0bd5e194e2aca372c7dd4b0911fabf5b9ae80c Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dsteve@broadcom.com>
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Date: Tue, 25 Mar 2014 11:48:01 +0000
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Subject: [PATCH 183/196] V4L2: Add manual white balance control.
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Adds support for V4L2_CID_RED_BALANCE and
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V4L2_CID_BLUE_BALANCE. Only has an effect if
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V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE has
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V4L2_WHITE_BALANCE_MANUAL selected.
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Signed-off-by: Dave Stevenson <dsteve@broadcom.com>
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---
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drivers/media/platform/bcm2835/bcm2835-camera.h | 4 ++-
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drivers/media/platform/bcm2835/controls.c | 39 +++++++++++++++++++++++-
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drivers/media/platform/bcm2835/mmal-parameters.h | 8 ++++-
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3 files changed, 48 insertions(+), 3 deletions(-)
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diff --git a/drivers/media/platform/bcm2835/bcm2835-camera.h b/drivers/media/platform/bcm2835/bcm2835-camera.h
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index f389bea..4ddd687 100644
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--- a/drivers/media/platform/bcm2835/bcm2835-camera.h
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+++ b/drivers/media/platform/bcm2835/bcm2835-camera.h
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@@ -15,7 +15,7 @@
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* core driver device
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*/
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-#define V4L2_CTRL_COUNT 25 /* number of v4l controls */
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+#define V4L2_CTRL_COUNT 27 /* number of v4l controls */
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enum {
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MMAL_COMPONENT_CAMERA = 0,
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@@ -49,6 +49,8 @@ struct bm2835_mmal_dev {
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struct mmal_colourfx colourfx;
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int hflip;
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int vflip;
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+ int red_gain;
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+ int blue_gain;
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enum mmal_parameter_exposuremode exposure_mode_user;
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enum v4l2_exposure_auto_type exposure_mode_v4l2_user;
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/* active exposure mode may differ if selected via a scene mode */
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diff --git a/drivers/media/platform/bcm2835/controls.c b/drivers/media/platform/bcm2835/controls.c
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index b7a7e88..9a40bd0 100644
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--- a/drivers/media/platform/bcm2835/controls.c
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+++ b/drivers/media/platform/bcm2835/controls.c
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@@ -491,6 +491,29 @@ static int ctrl_set_awb_mode(struct bm2835_mmal_dev *dev,
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&u32_value, sizeof(u32_value));
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}
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+static int ctrl_set_awb_gains(struct bm2835_mmal_dev *dev,
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+ struct v4l2_ctrl *ctrl,
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+ const struct bm2835_mmal_v4l2_ctrl *mmal_ctrl)
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+{
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+ struct vchiq_mmal_port *control;
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+ struct mmal_parameter_awbgains gains;
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+
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+ control = &dev->component[MMAL_COMPONENT_CAMERA]->control;
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+
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+ if (ctrl->id == V4L2_CID_RED_BALANCE)
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+ dev->red_gain = ctrl->val;
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+ else if (ctrl->id == V4L2_CID_BLUE_BALANCE)
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+ dev->blue_gain = ctrl->val;
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+
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+ gains.r_gain.num = dev->red_gain;
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+ gains.b_gain.num = dev->blue_gain;
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+ gains.r_gain.den = gains.b_gain.den = 1000;
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+
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+ return vchiq_mmal_port_parameter_set(dev->instance, control,
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+ mmal_ctrl->mmal_id,
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+ &gains, sizeof(gains));
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+}
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+
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static int ctrl_set_image_effect(struct bm2835_mmal_dev *dev,
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struct v4l2_ctrl *ctrl,
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const struct bm2835_mmal_v4l2_ctrl *mmal_ctrl)
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@@ -991,12 +1014,26 @@ static const struct bm2835_mmal_v4l2_ctrl v4l2_ctrls[V4L2_CTRL_COUNT] = {
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{
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V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
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MMAL_CONTROL_TYPE_STD_MENU,
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- ~0x3fe, 9, V4L2_WHITE_BALANCE_AUTO, 0, NULL,
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+ ~0x3ff, 9, V4L2_WHITE_BALANCE_AUTO, 0, NULL,
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MMAL_PARAMETER_AWB_MODE,
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&ctrl_set_awb_mode,
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false
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},
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{
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+ V4L2_CID_RED_BALANCE, MMAL_CONTROL_TYPE_STD,
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+ 1, 7999, 1000, 1, NULL,
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+ MMAL_PARAMETER_CUSTOM_AWB_GAINS,
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+ &ctrl_set_awb_gains,
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+ false
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+ },
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+ {
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+ V4L2_CID_BLUE_BALANCE, MMAL_CONTROL_TYPE_STD,
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+ 1, 7999, 1000, 1, NULL,
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+ MMAL_PARAMETER_CUSTOM_AWB_GAINS,
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+ &ctrl_set_awb_gains,
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+ false
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+ },
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+ {
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V4L2_CID_COLORFX, MMAL_CONTROL_TYPE_STD_MENU,
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0, 15, V4L2_COLORFX_NONE, 0, NULL,
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MMAL_PARAMETER_IMAGE_EFFECT,
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diff --git a/drivers/media/platform/bcm2835/mmal-parameters.h b/drivers/media/platform/bcm2835/mmal-parameters.h
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index ae8fef9..089f949 100644
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--- a/drivers/media/platform/bcm2835/mmal-parameters.h
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+++ b/drivers/media/platform/bcm2835/mmal-parameters.h
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@@ -161,7 +161,8 @@ enum mmal_parameter_camera_type {
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MMAL_PARAMETER_SW_SHARPEN_DISABLE, /**< @ref MMAL_PARAMETER_BOOLEAN_T */
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MMAL_PARAMETER_FLASH_REQUIRED, /**< @ref MMAL_PARAMETER_BOOLEAN_T */
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MMAL_PARAMETER_SW_SATURATION_DISABLE, /**< @ref MMAL_PARAMETER_BOOLEAN_T */
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- MMAL_PARAMETER_SHUTTER_SPEED /**< Takes a @ref MMAL_PARAMETER_UINT32_T */
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+ MMAL_PARAMETER_SHUTTER_SPEED, /**< Takes a @ref MMAL_PARAMETER_UINT32_T */
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+ MMAL_PARAMETER_CUSTOM_AWB_GAINS, /**< Takes a @ref MMAL_PARAMETER_AWB_GAINS_T */
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};
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struct mmal_parameter_rational {
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@@ -292,6 +293,11 @@ enum MMAL_PARAM_FLICKERAVOID_T {
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MMAL_PARAM_FLICKERAVOID_MAX = 0x7FFFFFFF
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};
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+struct mmal_parameter_awbgains {
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+ struct mmal_parameter_rational r_gain; /**< Red gain */
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+ struct mmal_parameter_rational b_gain; /**< Blue gain */
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+};
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+
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/** Manner of video rate control */
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enum mmal_parameter_rate_control_mode {
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MMAL_VIDEO_RATECONTROL_DEFAULT,
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--
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1.9.1
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