On 08/08/2024 09:24, Jacopo Mondi wrote:
> Hi Hans
>
> On Thu, Aug 08, 2024 at 08:31:58AM GMT, Hans Verkuil wrote:
>> On 07/08/2024 23:22, 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>
>>> Tested-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
>>> Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
>>> ---
>>> include/uapi/linux/rkisp1-config.h | 485 +++++++++++++++++++++++++++++
>>> 1 file changed, 485 insertions(+)
>>>
>>> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
>>> index 6eeaf8bf2362..14a23fd9a745 100644
>>> --- a/include/uapi/linux/rkisp1-config.h
>>> +++ b/include/uapi/linux/rkisp1-config.h
>>> @@ -996,4 +996,489 @@ 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,
>>> +};
>>> +
>>> +#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)));
>>> +
>>> +#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,
>>
>> I see no check against this in the rkisp1 code. Shouldn't this be checked?
>> If the version is unsupported, then just return an error.
>>
>
> Do we need this for the first version ? There are no other versions
> userspace can use at the moment. I can add a check during validation
> though.
Yes: if a V2 is added in the future, and an application wants to use that
against a driver that only support V1, then that should fail.
>
>> Also, how does userspace know which version(s) is/are supported by the driver?
>>
>
> Good question, there is no API for that atm. Defining a new format
> version should only happen when a non-backward compatible change to
> the format is made. I understand an application can be compiled
> against a newer kernel header that provides a new format version but
> then run on an older kernel where the new format is not supported.
>
> Probably userspace should be able to identify what versions are
> supported by the driver it runs with and use the most appropriate one
> by selecting it at runtime.
>
> What API would you use for that ? Is this something required for this
> first version where a single format version is available ?
You need this also for this first version for the reason explained above.
Personally I would just make a read-only control that returns the highest
supported version.
Regards,
Hans
>
>> Regards,
>>
>> Hans
>>
>>> +};
>>> +
>>> +/**
>>> + * 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; | | | |
>>> + * | | | | 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 /* _UAPI_RKISP1_CONFIG_H */
>>
>
