include: linux: Update headers for rkisp1 extensible parameters

Update the kernel headers with the definitions for the rkisp1 extensible
parameters format.

The headers have been generated from the most recent linux-media stage
tree master branch, at commit a043ea54bbb9 ("Merge tag
'next-media-rkisp1-20240814' of
git://git.kernel.org/pub/scm/linux/kernel/git/pinchartl/linux.git").

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Paul Elder <paul.elder@ideasonboard.com>
Acked-by: Stefan Klug <stefan.klug@ideasonboard.com>

1 files changed, 578 insertions, 0 deletions

diff --git a/include/linux/rkisp1-config.h b/include/linux/rkisp1-config.h
index f87c6bd4..edbc6cb6 100644
--- a/include/linux/rkisp1-config.h
+++ b/include/linux/rkisp1-config.h
@@ -165,6 +165,11 @@
 #define RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS  6
 
 /*
+ * Compand
+ */
+#define RKISP1_CIF_ISP_COMPAND_NUM_POINTS	64
+
+/*
  * Measurement types
  */
 #define RKISP1_CIF_ISP_STAT_AWB           (1U << 0)
@@ -851,6 +856,39 @@ struct rkisp1_params_cfg {
 	struct rkisp1_cif_isp_isp_other_cfg others;
 };
 
+/**
+ * struct rkisp1_cif_isp_compand_bls_config - Rockchip ISP1 Companding parameters (BLS)
+ * @r: Fixed subtraction value for Bayer pattern R
+ * @gr: Fixed subtraction value for Bayer pattern Gr
+ * @gb: Fixed subtraction value for Bayer pattern Gb
+ * @b: Fixed subtraction value for Bayer pattern B
+ *
+ * The values will be subtracted from the sensor values. Note that unlike the
+ * dedicated BLS block, the BLS values in the compander are 20-bit unsigned.
+ */
+struct rkisp1_cif_isp_compand_bls_config {
+	__u32 r;
+	__u32 gr;
+	__u32 gb;
+	__u32 b;
+};
+
+/**
+ * struct rkisp1_cif_isp_compand_curve_config - Rockchip ISP1 Companding
+ * parameters (expand and compression curves)
+ * @px: Compand curve x-values. Each value stores the distance from the
+ *      previous x-value, expressed as log2 of the distance on 5 bits.
+ * @x: Compand curve x-values. The functionality of these parameters are
+ *     unknown due to do a lack of hardware documentation, but these are left
+ *     here for future compatibility purposes.
+ * @y: Compand curve y-values
+ */
+struct rkisp1_cif_isp_compand_curve_config {
+	__u8 px[RKISP1_CIF_ISP_COMPAND_NUM_POINTS];
+	__u32 x[RKISP1_CIF_ISP_COMPAND_NUM_POINTS];
+	__u32 y[RKISP1_CIF_ISP_COMPAND_NUM_POINTS];
+};
+
 /*---------- PART2: Measurement Statistics ------------*/
 
 /**
@@ -996,4 +1034,544 @@ struct rkisp1_stat_buffer {
 	struct rkisp1_cif_isp_stat params;
 };
 
+/*---------- PART3: Extensible Configuration Parameters  ------------*/
+
+/**
+ * enum rkisp1_ext_params_block_type - RkISP1 extensible params block type
+ *
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_BLS: Black level subtraction
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_DPCC: Defect pixel cluster correction
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_SDG: Sensor de-gamma
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_AWB_GAIN: Auto white balance gains
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_FLT: ISP filtering
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_BDM: Bayer de-mosaic
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_CTK: Cross-talk correction
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_GOC: Gamma out correction
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_DPF: De-noise pre-filter
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_DPF_STRENGTH: De-noise pre-filter strength
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_CPROC: Color processing
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_IE: Image effects
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_LSC: Lens shading correction
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_AWB_MEAS: Auto white balance statistics
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_HST_MEAS: Histogram statistics
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_AEC_MEAS: Auto exposure statistics
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_AFC_MEAS: Auto-focus statistics
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_BLS: BLS in the compand block
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_EXPAND: Companding expand curve
+ * @RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_COMPRESS: Companding compress curve
+ */
+enum rkisp1_ext_params_block_type {
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_BLS,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_DPCC,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_SDG,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_AWB_GAIN,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_FLT,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_BDM,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_CTK,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_GOC,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_DPF,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_DPF_STRENGTH,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_CPROC,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_IE,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_LSC,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_AWB_MEAS,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_HST_MEAS,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_AEC_MEAS,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_AFC_MEAS,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_BLS,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_EXPAND,
+	RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_COMPRESS,
+};
+
+#define RKISP1_EXT_PARAMS_FL_BLOCK_DISABLE	(1U << 0)
+#define RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE	(1U << 1)
+
+/**
+ * struct rkisp1_ext_params_block_header - RkISP1 extensible parameters block
+ *					   header
+ *
+ * This structure represents the common part of all the ISP configuration
+ * blocks. Each parameters block shall embed an instance of this structure type
+ * as its first member, followed by the block-specific configuration data. The
+ * driver inspects this common header to discern the block type and its size and
+ * properly handle the block content by casting it to the correct block-specific
+ * type.
+ *
+ * The @type field is one of the values enumerated by
+ * :c:type:`rkisp1_ext_params_block_type` and specifies how the data should be
+ * interpreted by the driver. The @size field specifies the size of the
+ * parameters block and is used by the driver for validation purposes.
+ *
+ * The @flags field is a bitmask of per-block flags RKISP1_EXT_PARAMS_FL_*.
+ *
+ * When userspace wants to configure and enable an ISP block it shall fully
+ * populate the block configuration and set the
+ * RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE bit in the @flags field.
+ *
+ * When userspace simply wants to disable an ISP block the
+ * RKISP1_EXT_PARAMS_FL_BLOCK_DISABLE bit should be set in @flags field. The
+ * driver ignores the rest of the block configuration structure in this case.
+ *
+ * If a new configuration of an ISP block has to be applied userspace shall
+ * fully populate the ISP block configuration and omit setting the
+ * RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE and RKISP1_EXT_PARAMS_FL_BLOCK_DISABLE bits
+ * in the @flags field.
+ *
+ * Setting both the RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE and
+ * RKISP1_EXT_PARAMS_FL_BLOCK_DISABLE bits in the @flags field is not allowed
+ * and not accepted by the driver.
+ *
+ * Userspace is responsible for correctly populating the parameters block header
+ * fields (@type, @flags and @size) and the block-specific parameters.
+ *
+ * For example:
+ *
+ * .. code-block:: c
+ *
+ *	void populate_bls(struct rkisp1_ext_params_block_header *block) {
+ *		struct rkisp1_ext_params_bls_config *bls =
+ *			(struct rkisp1_ext_params_bls_config *)block;
+ *
+ *		bls->header.type = RKISP1_EXT_PARAMS_BLOCK_ID_BLS;
+ *		bls->header.flags = RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE;
+ *		bls->header.size = sizeof(*bls);
+ *
+ *		bls->config.enable_auto = 0;
+ *		bls->config.fixed_val.r = blackLevelRed_;
+ *		bls->config.fixed_val.gr = blackLevelGreenR_;
+ *		bls->config.fixed_val.gb = blackLevelGreenB_;
+ *		bls->config.fixed_val.b = blackLevelBlue_;
+ *	}
+ *
+ * @type: The parameters block type, see
+ *	  :c:type:`rkisp1_ext_params_block_type`
+ * @flags: A bitmask of block flags
+ * @size: Size (in bytes) of the parameters block, including this header
+ */
+struct rkisp1_ext_params_block_header {
+	__u16 type;
+	__u16 flags;
+	__u32 size;
+};
+
+/**
+ * struct rkisp1_ext_params_bls_config - RkISP1 extensible params BLS config
+ *
+ * RkISP1 extensible parameters Black Level Subtraction configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_BLS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Black Level Subtraction configuration, see
+ *	    :c:type:`rkisp1_cif_isp_bls_config`
+ */
+struct rkisp1_ext_params_bls_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_bls_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_dpcc_config - RkISP1 extensible params DPCC config
+ *
+ * RkISP1 extensible parameters Defective Pixel Cluster Correction configuration
+ * block. Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_DPCC`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Defective Pixel Cluster Correction configuration, see
+ *	    :c:type:`rkisp1_cif_isp_dpcc_config`
+ */
+struct rkisp1_ext_params_dpcc_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_dpcc_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_sdg_config - RkISP1 extensible params SDG config
+ *
+ * RkISP1 extensible parameters Sensor Degamma configuration block. Identified
+ * by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_SDG`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Sensor Degamma configuration, see
+ *	    :c:type:`rkisp1_cif_isp_sdg_config`
+ */
+struct rkisp1_ext_params_sdg_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_sdg_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_lsc_config - RkISP1 extensible params LSC config
+ *
+ * RkISP1 extensible parameters Lens Shading Correction configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_LSC`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Lens Shading Correction configuration, see
+ *	    :c:type:`rkisp1_cif_isp_lsc_config`
+ */
+struct rkisp1_ext_params_lsc_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_lsc_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_awb_gain_config - RkISP1 extensible params AWB
+ *					      gain config
+ *
+ * RkISP1 extensible parameters Auto-White Balance Gains configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_AWB_GAIN`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Auto-White Balance Gains configuration, see
+ *	    :c:type:`rkisp1_cif_isp_awb_gain_config`
+ */
+struct rkisp1_ext_params_awb_gain_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_awb_gain_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_flt_config - RkISP1 extensible params FLT config
+ *
+ * RkISP1 extensible parameters Filter configuration block. Identified by
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_FLT`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Filter configuration, see :c:type:`rkisp1_cif_isp_flt_config`
+ */
+struct rkisp1_ext_params_flt_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_flt_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_bdm_config - RkISP1 extensible params BDM config
+ *
+ * RkISP1 extensible parameters Demosaicing configuration block. Identified by
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_BDM`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Demosaicing configuration, see :c:type:`rkisp1_cif_isp_bdm_config`
+ */
+struct rkisp1_ext_params_bdm_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_bdm_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_ctk_config - RkISP1 extensible params CTK config
+ *
+ * RkISP1 extensible parameters Cross-Talk configuration block. Identified by
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_CTK`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Cross-Talk configuration, see :c:type:`rkisp1_cif_isp_ctk_config`
+ */
+struct rkisp1_ext_params_ctk_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_ctk_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_goc_config - RkISP1 extensible params GOC config
+ *
+ * RkISP1 extensible parameters Gamma-Out configuration block. Identified by
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_GOC`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Gamma-Out configuration, see :c:type:`rkisp1_cif_isp_goc_config`
+ */
+struct rkisp1_ext_params_goc_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_goc_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_dpf_config - RkISP1 extensible params DPF config
+ *
+ * RkISP1 extensible parameters De-noise Pre-Filter configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_DPF`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: De-noise Pre-Filter configuration, see
+ *	    :c:type:`rkisp1_cif_isp_dpf_config`
+ */
+struct rkisp1_ext_params_dpf_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_dpf_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_dpf_strength_config - RkISP1 extensible params DPF
+ *						  strength config
+ *
+ * RkISP1 extensible parameters De-noise Pre-Filter strength configuration
+ * block. Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_DPF_STRENGTH`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: De-noise Pre-Filter strength configuration, see
+ *	    :c:type:`rkisp1_cif_isp_dpf_strength_config`
+ */
+struct rkisp1_ext_params_dpf_strength_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_dpf_strength_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_cproc_config - RkISP1 extensible params CPROC config
+ *
+ * RkISP1 extensible parameters Color Processing configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_CPROC`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Color processing configuration, see
+ *	    :c:type:`rkisp1_cif_isp_cproc_config`
+ */
+struct rkisp1_ext_params_cproc_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_cproc_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_ie_config - RkISP1 extensible params IE config
+ *
+ * RkISP1 extensible parameters Image Effect configuration block. Identified by
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_IE`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Image Effect configuration, see :c:type:`rkisp1_cif_isp_ie_config`
+ */
+struct rkisp1_ext_params_ie_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_ie_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_awb_meas_config - RkISP1 extensible params AWB
+ *					      Meas config
+ *
+ * RkISP1 extensible parameters Auto-White Balance Measurement configuration
+ * block. Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_AWB_MEAS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Auto-White Balance measure configuration, see
+ *	    :c:type:`rkisp1_cif_isp_awb_meas_config`
+ */
+struct rkisp1_ext_params_awb_meas_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_awb_meas_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_hst_config - RkISP1 extensible params Histogram config
+ *
+ * RkISP1 extensible parameters Histogram statistics configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_HST_MEAS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Histogram statistics configuration, see
+ *	    :c:type:`rkisp1_cif_isp_hst_config`
+ */
+struct rkisp1_ext_params_hst_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_hst_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_aec_config - RkISP1 extensible params AEC config
+ *
+ * RkISP1 extensible parameters Auto-Exposure statistics configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_AEC_MEAS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Auto-Exposure statistics configuration, see
+ *	    :c:type:`rkisp1_cif_isp_aec_config`
+ */
+struct rkisp1_ext_params_aec_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_aec_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_afc_config - RkISP1 extensible params AFC config
+ *
+ * RkISP1 extensible parameters Auto-Focus statistics configuration block.
+ * Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_AFC_MEAS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Auto-Focus statistics configuration, see
+ *	    :c:type:`rkisp1_cif_isp_afc_config`
+ */
+struct rkisp1_ext_params_afc_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_afc_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_compand_bls_config - RkISP1 extensible params
+ * Compand BLS config
+ *
+ * RkISP1 extensible parameters Companding configuration block (black level
+ * subtraction). Identified by :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_BLS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Companding BLS configuration, see
+ *	    :c:type:`rkisp1_cif_isp_compand_bls_config`
+ */
+struct rkisp1_ext_params_compand_bls_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_compand_bls_config config;
+} __attribute__((aligned(8)));
+
+/**
+ * struct rkisp1_ext_params_compand_curve_config - RkISP1 extensible params
+ * Compand curve config
+ *
+ * RkISP1 extensible parameters Companding configuration block (expand and
+ * compression curves). Identified by
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_EXPAND` or
+ * :c:type:`RKISP1_EXT_PARAMS_BLOCK_TYPE_COMPAND_COMPRESS`.
+ *
+ * @header: The RkISP1 extensible parameters header, see
+ *	    :c:type:`rkisp1_ext_params_block_header`
+ * @config: Companding curve configuration, see
+ *	    :c:type:`rkisp1_cif_isp_compand_curve_config`
+ */
+struct rkisp1_ext_params_compand_curve_config {
+	struct rkisp1_ext_params_block_header header;
+	struct rkisp1_cif_isp_compand_curve_config config;
+} __attribute__((aligned(8)));
+
+/*
+ * The rkisp1_ext_params_compand_curve_config structure is counted twice as it
+ * is used for both the COMPAND_EXPAND and COMPAND_COMPRESS block types.
+ */
+#define RKISP1_EXT_PARAMS_MAX_SIZE					\
+	(sizeof(struct rkisp1_ext_params_bls_config)			+\
+	sizeof(struct rkisp1_ext_params_dpcc_config)			+\
+	sizeof(struct rkisp1_ext_params_sdg_config)			+\
+	sizeof(struct rkisp1_ext_params_lsc_config)			+\
+	sizeof(struct rkisp1_ext_params_awb_gain_config)		+\
+	sizeof(struct rkisp1_ext_params_flt_config)			+\
+	sizeof(struct rkisp1_ext_params_bdm_config)			+\
+	sizeof(struct rkisp1_ext_params_ctk_config)			+\
+	sizeof(struct rkisp1_ext_params_goc_config)			+\
+	sizeof(struct rkisp1_ext_params_dpf_config)			+\
+	sizeof(struct rkisp1_ext_params_dpf_strength_config)		+\
+	sizeof(struct rkisp1_ext_params_cproc_config)			+\
+	sizeof(struct rkisp1_ext_params_ie_config)			+\
+	sizeof(struct rkisp1_ext_params_awb_meas_config)		+\
+	sizeof(struct rkisp1_ext_params_hst_config)			+\
+	sizeof(struct rkisp1_ext_params_aec_config)			+\
+	sizeof(struct rkisp1_ext_params_afc_config)			+\
+	sizeof(struct rkisp1_ext_params_compand_bls_config)		+\
+	sizeof(struct rkisp1_ext_params_compand_curve_config)		+\
+	sizeof(struct rkisp1_ext_params_compand_curve_config))
+
+/**
+ * enum rksip1_ext_param_buffer_version - RkISP1 extensible parameters version
+ *
+ * @RKISP1_EXT_PARAM_BUFFER_V1: First version of RkISP1 extensible parameters
+ */
+enum rksip1_ext_param_buffer_version {
+	RKISP1_EXT_PARAM_BUFFER_V1 = 1,
+};
+
+/**
+ * struct rkisp1_ext_params_cfg - RkISP1 extensible parameters configuration
+ *
+ * This struct contains the configuration parameters of the RkISP1 ISP
+ * algorithms, serialized by userspace into a data buffer. Each configuration
+ * parameter block is represented by a block-specific structure which contains a
+ * :c:type:`rkisp1_ext_params_block_header` entry as first member. Userspace
+ * populates the @data buffer with configuration parameters for the blocks that
+ * it intends to configure. As a consequence, the data buffer effective size
+ * changes according to the number of ISP blocks that userspace intends to
+ * configure and is set by userspace in the @data_size field.
+ *
+ * The parameters buffer is versioned by the @version field to allow modifying
+ * and extending its definition. Userspace shall populate the @version field to
+ * inform the driver about the version it intends to use. The driver will parse
+ * and handle the @data buffer according to the data layout specific to the
+ * indicated version and return an error if the desired version is not
+ * supported.
+ *
+ * Currently the single RKISP1_EXT_PARAM_BUFFER_V1 version is supported.
+ * When a new format version will be added, a mechanism for userspace to query
+ * the supported format versions will be implemented in the form of a read-only
+ * V4L2 control. If such control is not available, userspace should assume only
+ * RKISP1_EXT_PARAM_BUFFER_V1 is supported by the driver.
+ *
+ * For each ISP block that userspace wants to configure, a block-specific
+ * structure is appended to the @data buffer, one after the other without gaps
+ * in between nor overlaps. Userspace shall populate the @data_size field with
+ * the effective size, in bytes, of the @data buffer.
+ *
+ * The expected memory layout of the parameters buffer is::
+ *
+ *	+-------------------- struct rkisp1_ext_params_cfg -------------------+
+ *	| version = RKISP_EXT_PARAMS_BUFFER_V1;                               |
+ *	| data_size = sizeof(struct rkisp1_ext_params_bls_config)             |
+ *	|           + sizeof(struct rkisp1_ext_params_dpcc_config);           |
+ *	| +------------------------- data  ---------------------------------+ |
+ *	| | +------------- struct rkisp1_ext_params_bls_config -----------+ | |
+ *	| | | +-------- struct rkisp1_ext_params_block_header  ---------+ | | |
+ *	| | | | type = RKISP1_EXT_PARAMS_BLOCK_TYPE_BLS;                | | | |
+ *	| | | | flags = RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE;              | | | |
+ *	| | | | size = sizeof(struct rkisp1_ext_params_bls_config);     | | | |
+ *	| | | +---------------------------------------------------------+ | | |
+ *	| | | +---------- struct rkisp1_cif_isp_bls_config -------------+ | | |
+ *	| | | | enable_auto = 0;                                        | | | |
+ *	| | | | fixed_val.r = 256;                                      | | | |
+ *	| | | | fixed_val.gr = 256;                                     | | | |
+ *	| | | | fixed_val.gb = 256;                                     | | | |
+ *	| | | | fixed_val.b = 256;                                      | | | |
+ *	| | | +---------------------------------------------------------+ | | |
+ *	| | +------------ struct rkisp1_ext_params_dpcc_config -----------+ | |
+ *	| | | +-------- struct rkisp1_ext_params_block_header  ---------+ | | |
+ *	| | | | type = RKISP1_EXT_PARAMS_BLOCK_TYPE_DPCC;               | | | |
+ *	| | | | flags = RKISP1_EXT_PARAMS_FL_BLOCK_ENABLE;              | | | |
+ *	| | | | size = sizeof(struct rkisp1_ext_params_dpcc_config);    | | | |
+ *	| | | +---------------------------------------------------------+ | | |
+ *	| | | +---------- struct rkisp1_cif_isp_dpcc_config ------------+ | | |
+ *	| | | | mode = RKISP1_CIF_ISP_DPCC_MODE_STAGE1_ENABLE;          | | | |
+ *	| | | | output_mode =                                           | | | |
+ *	| | | |   RKISP1_CIF_ISP_DPCC_OUTPUT_MODE_STAGE1_INCL_G_CENTER; | | | |
+ *	| | | | set_use = ... ;                                         | | | |
+ *	| | | | ...  = ... ;                                            | | | |
+ *	| | | +---------------------------------------------------------+ | | |
+ *	| | +-------------------------------------------------------------+ | |
+ *	| +-----------------------------------------------------------------+ |
+ *	+---------------------------------------------------------------------+
+ *
+ * @version: The RkISP1 extensible parameters buffer version, see
+ *	     :c:type:`rksip1_ext_param_buffer_version`
+ * @data_size: The RkISP1 configuration data effective size, excluding this
+ *	       header
+ * @data: The RkISP1 extensible configuration data blocks
+ */
+struct rkisp1_ext_params_cfg {
+	__u32 version;
+	__u32 data_size;
+	__u8 data[RKISP1_EXT_PARAMS_MAX_SIZE];
+};
+
 #endif /* _RKISP1_CONFIG_H */