On 30/07/2024 14:11, Hans Verkuil wrote:
> On 24/07/2024 10:49, Jacopo Mondi wrote:
>> Add to the rkisp1-config.h header data types and documentation of
>> the extensible parameters format.
>>
>> Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
>> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>> Reviewed-by: Paul Elder <paul.elder@xxxxxxxxxxxxxxxx>
>> ---
>> include/uapi/linux/rkisp1-config.h | 489 +++++++++++++++++++++++++++++
>> 1 file changed, 489 insertions(+)
>>
>> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
>> index 6eeaf8bf2362..00b09c92cca7 100644
>> --- a/include/uapi/linux/rkisp1-config.h
>> +++ b/include/uapi/linux/rkisp1-config.h
>> @@ -996,4 +996,493 @@ 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
>> + */
>> +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,
>> +};
>> +
>> +/**
>> + * enum rkisp1_ext_params_block_enable - RkISP1 extensible parameter block
>> + * enable flags
>> + *
>> + * @RKISP1_EXT_PARAMS_BLOCK_DISABLE: Disable the HW block
>> + * @RKISP1_EXT_PARAMS_BLOCK_ENABLE: Enable the HW block
>> + */
>> +enum rkisp1_ext_params_block_enable {
>> + RKISP1_EXT_PARAMS_BLOCK_DISABLE,
>> + RKISP1_EXT_PARAMS_BLOCK_ENABLE,
>> +};
>> +
>> +/**
>> + * struct rkisp1_ext_params_block_header - RkISP1 extensible parameter 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 @enable field specifies the ISP block enablement state. The possible
>> + * enablement states are enumerated by :c:type:`rkisp1_ext_params_block_enable`.
>> + * When userspace needs to configure and enable an ISP block it shall fully
>> + * populate the block configuration and the @enable flag shall be set to
>> + * RKISP1_EXT_PARAMS_BLOCK_ENABLE. When userspace simply wants to disable the
>> + * ISP block the @enable flag shall be set to RKISP1_EXT_PARAMS_BLOCK_DISABLE.
>> + * 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 set the @enable flag to
>> + * RKISP1_EXT_PARAMS_BLOCK_ENABLE.
>> + *
>> + * Userspace is responsible for correctly populating the parameters block header
>> + * fields (@type, @enable 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.enable = RKISP1_EXT_PARAMS_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`
>> + * @enable: The block enable flag, see
>> + * :c:type:`rkisp1_ext_params_block_enable`
>> + * @size: Size (in bytes) of the parameters block, including this header
>> + */
>> +struct rkisp1_ext_params_block_header {
>> + __u16 type;
>> + __u16 enable;
>> + __u16 size;
>
> I would suggest changing this to '__u32 size;'. It ensures the header is8 bytes
> long (much nicer than 6), and if there is ever a block > 65535, then it is supported.
>
> i wonder if, with this change, the 'aligned(8)' attributes are even needed, but
> I didn't dig into that.
Follow-up: I wonder if this can be a generic v4l2 struct: perhaps the same approach
makes sense for other drivers as well.
Just an idea.
Regards,
Hans
>
> Did you check with pahole for holes etc. in the datastructures?
>
> Regards,
>
> Hans
>
>> +} __attribute__((aligned(8)));
>> +
>> +/**
>> + * 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)));
>> +
>> +#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))
>> +
>> +/**
>> + * 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.
>> + *
>> + * 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; | | | |
>> + * | | | | enable = RKISP1_EXT_PARAMS_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; | | | |
>> + * | | | | enable = RKISP1_EXT_PARAMS_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 /* _UAPI_RKISP1_CONFIG_H */
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