On Wed, Jun 12, 2024 at 02:49:42PM +0100, Daniel Scally wrote:
> On 12/06/2024 13:56, Laurent Pinchart wrote:
> > On Wed, Jun 12, 2024 at 11:02:58AM +0100, Daniel Scally wrote:
> >> On 05/06/2024 17:54, 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>
> >>> ---
> >>> include/uapi/linux/rkisp1-config.h | 482 +++++++++++++++++++++++++++++
> >>> 1 file changed, 482 insertions(+)
> >>>
> >>> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
> >>> index 6eeaf8bf2362..9c93e536f270 100644
> >>> --- a/include/uapi/linux/rkisp1-config.h
> >>> +++ b/include/uapi/linux/rkisp1-config.h
> >>> @@ -996,4 +996,486 @@ 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_GAINS: 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_STRENGHT: 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_GAINS,
> >>> + 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_STRENGHT,
> >>> + 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_SENTINEL,
> >>> +};
> >>
> >> Laurent suggested referencing the enum value in the comments for each
> >> block in his review of the C55 series, and I think that that's a good
> >> idea - can we do that?
> >
> > I would like that too.
> >
> >> Otherwise, looks good to me:
> >>
> >> Reviewed-by: Daniel Scally <dan.scally@xxxxxxxxxxxxxxxx>
> >>
> >>> +
> >>> +/**
> >>> + * enum rkisp1_ext_params_block_state - RkISP1 extensible parameter block enable
> >>> + * state flags
> >>> + *
> >>> + * @RKISP1_EXT_PARAMS_BLOCK_NO_CHANGE: Do not change the block power state
> >
> > I wouldn't call that "power" state, I don't think it's about power.
> >
> >>> + * @RKISP1_EXT_PARAMS_BLOCK_DISABLE: Disable the HW block
> >>> + * @RKISP1_EXT_PARAMS_BLOCK_ENABLE: Enable the HW block
> >>> + */
> >>> +enum rkisp1_ext_params_block_state {
> >>> + RKISP1_EXT_PARAMS_BLOCK_NO_CHANGE,
> >>> + 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 @state field specifies if the ISP block power state should be changed,
> >>> + * and, if it has to, if it has to be enabled to disabled. The possible
> >>> + * states are enumerated by :c:type:`rkisp1_ext_params_block_state`.
> >>> + * When userspace needs to configure and enable an ISP block it shall fully
> >>> + * populate the block configuration and the @state flag shall be set to
> >>> + * RKISP1_EXT_PARAMS_BLOCK_ENABLE. When userspace simply wants to disable the
> >>> + * ISP block the @state flag shall be set to RKISP1_EXT_PARAMS_BLOCK_DISABLE.
> >
> > You should document here what happens to the rest of the parameters in
> > the block in that case. I think they should be ignored by the driver,
> > and possibly set to 0 by userspace.
> >
> > Another option when disabling a block would be to include the header
> > only, with the size field set to the header size, and not include the
> > rest of the block contents. It's a bit pointless to include data that
> > the kernel won't use. While that would be my preference from an API
> > point of view (at least until someone points out to use cases that would
> > benefit from a different option), I haven't checked what it would imply
> > from a userspace and kernelspace implementation point of view. I could
> > agree to keeping the data part of the block in for disabled blocks if
> > omitting it would result in implementation issues.
>
> I forgot about this suggestion - for what it's worth I agree that it's
> a good one, I'm going to follow it for the C55
The 64-bit alignment issue applies to the C55 too :-)
> >>> If
> >>> + * a new configuration of an ISP block should be applied but the power state
> >>> + * doesn't need to be changed, userspace shall fully populate the ISP block
> >>> + * configuration and the @state flag shall be set to
> >>> + * RKISP1_EXT_PARAMS_BLOCK_NO_CHANGE.
> >
> > I don't think we need RKISP1_EXT_PARAMS_BLOCK_NO_CHANGE for that. The
> > state can just be set to @RKISP1_EXT_PARAMS_BLOCK_ENABLE.
>
> I did think about that, but it avoids reading the register to check if
> it's already enabled or not / writing enable unconditionally...is the
> saved overhead not worth it?
Generally speaking, I wouldn't fine-tune the UAPI based on the internal
implementation of the driver. If the driver would benefit from knowing,
without accessing the hardware, if a block is enabled or not, it could
cache that information instead of relying on userspace to provide it. If
we keep RKISP1_EXT_PARAMS_BLOCK_NO_CHANGE, I would expect the driver to
not write hardware registers for a block that is currently disabled if
it receives a NO_CHANGE parameters block. The driver would thus need to
cache that information (or read it back from the hardware) already.
> >>> + *
> >>> + * Userspace is responsible for correctly populating the parameters block header
> >>> + * fields (@type, @state and @size) and correctly populate 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;
> >>> + *
> >>> + * block->header.type = RKISP1_EXT_PARAMS_BLOCK_ID_BLS;
> >>> + * block->header.state = RKISP1_EXT_PARAMS_BLOCK_ENABLE;
> >>> + * block->header.size = sizeof(struct rkisp1_ext_params_bls_config);
> >>> + *
> >>> + * bls->bls_config.enable_auto = 0;
> >>> + * bls->bls_config.fixed_val.r = blackLevelRed_;
> >>> + * bls->bls_config.fixed_val.gr = blackLevelGreenR_;
> >>> + * bls->bls_config.fixed_val.gb = blackLevelGreenB_;
> >>> + * bls->bls_config.fixed_val.b = blackLevelBlue_;
> >>> + * }
> >>> + *
> >>> + * @type: The parameters block type, see
> >>> + * :c:type:`rkisp1_ext_params_block_type`
> >>> + * @state: The block enable state flag, see
> >>> + * :c:type:`rkisp1_ext_params_block_state`
> >>> + * @size: Size (in bytes) of the parameters block, including this header
> >>> + */
> >>> +struct rkisp1_ext_params_block_header {
> >>> + __u32 type;
> >>> + __u32 state;
> >>> + __u64 size;
> >
> > I think a 32-bit size would be move than enough. The header should
> > however be 64-bit aligned.
> >
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_bls_config - RkISP1 extensible params BLS config
> >>> + *
> >>> + * RkISP1 extensible parameters Black Level Subtraction configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @bls_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 bls_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_dpcc_config - RkISP1 extensible params DPCC config
> >>> + *
> >>> + * RkISP1 extensible parameters Defective Pixel Cluster Correction configuration
> >>> + * block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @dpcc_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 dpcc_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_sdg_config - RkISP1 extensible params SDG config
> >>> + *
> >>> + * RkISP1 extensible parameters Sensor Degamma configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @sdg_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 sdg_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_lsc_config - RkISP1 extensible params LSC config
> >>> + *
> >>> + * RkISP1 extensible parameters Lens Shading Correction configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @lsc_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 lsc_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_awb_gain_config - RkISP1 extensible params AWB
> >>> + * gain config
> >>> + *
> >>> + * RkISP1 extensible parameters Auto-White Balance Gains configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @awb_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 awb_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_flt_config - RkISP1 extensible params FLT config
> >>> + *
> >>> + * RkISP1 extensible parameters Filter configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @flt_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 flt_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_bdm_config - RkISP1 extensible params BDM config
> >>> + *
> >>> + * RkISP1 extensible parameters Demosaicing configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @bdm_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 bdm_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_ctk_config - RkISP1 extensible params CTK config
> >>> + *
> >>> + * RkISP1 extensible parameters Cross-Talk configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @ctk_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 ctk_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_goc_config - RkISP1 extensible params GOC config
> >>> + *
> >>> + * RkISP1 extensible parameters Gamma-Out configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @goc_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 goc_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_dpf_config - RkISP1 extensible params DPF config
> >>> + *
> >>> + * RkISP1 extensible parameters De-noise Pre-Filter configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @dpf_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 dpf_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_dpf_strength_config - RkISP1 extensible params DPF
> >>> + * strength config
> >>> + *
> >>> + * RkISP1 extensible parameters De-noise Pre-Filter strength configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @dpf_strength_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 dpf_strength_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_cproc_config - RkISP1 extensible params CPROC config
> >>> + *
> >>> + * RkISP1 extensible parameters Color Processing configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @cproc_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 cproc_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_ie_config - RkISP1 extensible params IE config
> >>> + *
> >>> + * RkISP1 extensible parameters Image Effect configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @ie_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 ie_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_awb_meas_config - RkISP1 extensible params AWB
> >>> + * Meas config
> >>> + *
> >>> + * RkISP1 extensible parameters Auto-White Balance Measurement configuration
> >>> + * block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @awb_meas_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 awb_meas_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_hst_config - RkISP1 extensible params Histogram config
> >>> + *
> >>> + * RkISP1 extensible parameters Histogram statistics configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @hst_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 hst_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_aec_config - RkISP1 extensible params AEC config
> >>> + *
> >>> + * RkISP1 extensible parameters Auto-Exposure statistics configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @aec_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 aec_config;
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct rkisp1_ext_params_afc_config - RkISP1 extensible params AFC config
> >>> + *
> >>> + * RkISP1 extensible parameters Auto-Focus statistics configuration block
> >>> + *
> >>> + * @header: The RkISP1 extensible parameters header, see
> >>> + * :c:type:`rkisp1_ext_params_block_header`
> >>> + * @afc_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 afc_config;
> >>> +};
> >>> +
> >>> +#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 @total_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
> >
> > I think we should align all the blocks to a 64 bits boundary. Otherwise
> > we'll have unaligned access issues, as well as layout differences
> > between 32-bitand 64-bit userspace.
> >
> >>> + * in between nor overlaps. Userspace shall populate the @total_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; |
> >>> + * | total_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; | | | |
> >>> + * | | | | state = 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; | | | |
> >>> + * | | | | state = 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`
> >>> + * @total_size: The RkISP1 configuration data effective size, excluding this
> >>> + * header
> >>> + * @data: The RkISP1 extensible configuration data blocks
> >>> + */
> >>> +struct rkisp1_ext_params_cfg {
> >>> + __u32 version;
> >
> > On a 64-bit system there will be a 32-bit hole here, while on a 32-bit
> > system there won't. This means that a 32-bit userspace won't run on a
> > 64-bit kernel. You can add a a __u32 reserved field to fix that.
> >
> >>> + __u64 total_size;
> >>> + __u8 data[RKISP1_EXT_PARAMS_MAX_SIZE];
> >>> +};
> >>> +
> >>> #endif /* _UAPI_RKISP1_CONFIG_H */
--
Regards,
Laurent Pinchart
