media: rppx1: awbg: Add support for white balance gain settings

Extend the RPPX1 driver to allow setting the white balance gain
configuration parameters. It uses the RPPX1 framework for parameters and
its writer abstraction to allow the user to control how, and when,
configuration is applied to the RPPX1.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Co-developed-by: Jai Luthra <jai.luthra+renesas@ideasonboard.com>
Signed-off-by: Jai Luthra <jai.luthra+renesas@ideasonboard.com>
Co-developed-by: Jacopo Mondi <jacopo.mondi+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi+renesas@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>

1 files changed, 39 insertions, 1 deletions

diff --git a/include/uapi/linux/media/dreamchip/rppx1-config.h b/include/uapi/linux/media/dreamchip/rppx1-config.h
index f674b041664e..b388a9003d8b 100644
--- a/include/uapi/linux/media/dreamchip/rppx1-config.h
+++ b/include/uapi/linux/media/dreamchip/rppx1-config.h
@@ -47,9 +47,15 @@ struct rppx1_window {
  * NOTE: Only append to the enumeration as the numbers are uAPI.
  *
  * @RPPX1_PARAMS_BLOCK_TYPE_WBMEAS_POST: AWB Measurement Configuration
+ * @RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1: PRE1 pipe White Balance Gains
+ * @RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2: PRE2 White Balance Gains
+ * @RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST: MAIN_POST White Balance Gains
  */
 enum rppx1_params_block_type {
 	RPPX1_PARAMS_BLOCK_TYPE_WBMEAS_POST,
+	RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2,
+	RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST,
 };
 
 /**
@@ -115,13 +121,45 @@ struct rppx1_wbmeas_params {
 };
 
 /**
+ * struct rppx1_awbg_params  - WB gain configuration
+ *
+ * The RPP-X1 White Balance Gain module is available in the PRE1 and PRE2
+ * pre-fusion pipes and in the MAIN_POST post-fusion pipe. Userspace selects
+ * which pipe to operate by setting the @header.type field to
+ * RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1, RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2
+ * or RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST.
+ *
+ * The White Balance module allows to specify per-color channel gains, expressed
+ * as unsigned fixed-point values as 18 bits unsigned integers in Q6.12 format
+ * with a maximum of 63.999.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1 or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2 or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST)
+ * @gain_red: gain for red component, 18-bit (unsigned Q6.12)
+ * @gain_green_r: gain for green component in red lines, 18-bit (unsigned Q6.12)
+ * @gain_blue: gain for blue component, 18-bit (unsigned Q6.12)
+ * @gain_green_b: gain for green component in blue lines, 18-bit (unsigned Q6.12)
+ */
+struct rppx1_awbg_params {
+	struct v4l2_isp_params_block_header header;
+	__u32 gain_red;
+	__u32 gain_green_r;
+	__u32 gain_blue;
+	__u32 gain_green_b;
+};
+
+/**
  * RPPX1_PARAMS_MAX_SIZE - Maximum size of all RPP-X1 parameter blocks
  *
  * Some types are reported twice as the same block might be instantiated in
  * multiple pipes.
  */
 #define RPPX1_PARAMS_MAX_SIZE						\
-	(sizeof(struct rppx1_wbmeas_params))
+	(sizeof(struct rppx1_wbmeas_params)			+	\
+	sizeof(struct rppx1_awbg_params)			+	\
+	sizeof(struct rppx1_awbg_params)			+	\
+	sizeof(struct rppx1_awbg_params))
 
 /* ---------------------------------------------------------------------------
  * Statistics Structures