Hi Hans,
On Tue, Jul 30, 2024 at 02:11:12PM +0200, 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'm pretty confident we will never need a block size larger than 64kB.
That would mean more than 64kB of data written to hardware
registers/SRAM for a single processing block, and it would be incredibly
expensive in terms of hardware. Keeping size a __u16 means we have two
bytes of reserved space we could possibly use later, which may come
handy. Blocks > 64kB could still be supported in the future by defining
a new version of the parameters format (RKISP1_EXT_PARAM_BUFFER_V2)
without needing a different 4CC.
This being said, the opposite argument can be made, that a 32-bit size
could come handy if we ever have larger blocks, and a new version of the
parameters format could be used if we ever need to add more fields to
the block header. I won't insist either way.
> i wonder if, with this change, the 'aligned(8)' attributes are even needed, but
> I didn't dig into that.
The header would become 8-bytes long, but its larger field would still
be 4-bytes long, so the compiler would only enforce 4-bytes aligned
AFAIK.
> Did you check with pahole for holes etc. in the datastructures?
That's a good idea in any case.
> > +} __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 */
--
Regards,
Laurent Pinchart
