Hi Laurent
On Tue, Aug 06, 2024 at 12:06:23PM GMT, Laurent Pinchart wrote:
> On Tue, Aug 06, 2024 at 10:24:20AM +0200, Jacopo Mondi wrote:
> > On Tue, Aug 06, 2024 at 10:17:02AM GMT, Hans Verkuil wrote:
> > > On 06/08/2024 09:27, Jacopo Mondi wrote:
> > > > On Tue, Jul 30, 2024 at 02:37:04PM GMT, Hans Verkuil wrote:
> > > >> On 30/07/2024 14:18, Laurent Pinchart wrote:
> > > >>> 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.
> > > >>
> > > >> Hmm, famous last words :-)
> > > >>
> > > >>> 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.
> > > >>
> > > >> i would prefer to change the size to a u32, but rename the 'enable' field
> > > >> to 'flags', and assign bit 0 to the enable/disable bit. This is a bit
> > > >> more flexible IMHO and allows for 15 bits to encode additional data.
> > > >>
> > > >> 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.
> > > >>
> > > >> Normally the actual data blocks (in the non-extensible format) are already aligned
> > > >> to either 4 or 8 bytes (depending on whether u64 values are used). So an 8 byte
> > > >> header won't mess up the alignment.
> > > >
> > > > When it come to existing uAPI types (non-extensible) they sometimes
> > > > have holes and are aligned by the compiler to the size of the
> > > > largest-member, even when embedded in other structure. In example,
> > > > cproc is 7 bytes in size
> > > >
> > > > struct rkisp1_cif_isp_cproc_config {
> > > > __u8 c_out_range; /* 0 1 */
> > > > __u8 y_in_range; /* 1 1 */
> > > > __u8 y_out_range; /* 2 1 */
> > > > __u8 contrast; /* 3 1 */
> > > > __u8 brightness; /* 4 1 */
> > > > __u8 sat; /* 5 1 */
> > > > __u8 hue; /* 6 1 */
> > > >
> > > > /* size: 7, cachelines: 1, members: 7 */
> > > > /* last cacheline: 7 bytes */
> > > > };
> > > >
> > > > And when embedded in the corresponding extensible type it gets aligned
> > > > to the size of the largest member in the structure (4 bytes)
> > > > regardless if __attribute__((aligned(8)) is specified or not (by
> > > > chance, in this case we get a size which is 8-bytes aligned)
> > > >
> > > > struct rkisp1_ext_params_cproc_config {
> > > > struct rkisp1_ext_params_block_header header; /* 0 8 */
> > > > struct rkisp1_cif_isp_cproc_config config; /* 8 7 */
> > > >
> > > > /* size: 16, cachelines: 1, members: 2 */
> > > > /* padding: 1 */
> > > > /* last cacheline: 16 bytes */
> > > > };
> > >
> > > A potential problem with padding in a public data structure is that you
> > > have to be careful that no memory is leaked in the padding data from the
> > > kernel to userspace.
> >
> > I agree with all the above, but keep in mind the above type is already
> > part of the uAPI (the so-called FIXED format) and I cannot change it
> > without changing the associated V4L2_META_FMT_RK_ISP1_PARAMS pixel format.
> >
> > > Another potential problem is if e.g. rkisp1_cif_isp_cproc_config is extended
> > > with a new byte in the future: in that case the new byte would replace the current
> > > padding byte, but applications using the older struct may have left the
> > > padding byte undefined, so the driver can't rely on that byte being 0
> > > when called from such an application.
> >
> > This can't happen with the existing fixed V4L2_META_FMT_RK_ISP1_PARAMS
> > format. If the uAPI types change, a new pixel format would be
> > needed. That's why we introduced the new extensible (and versioned) format :)
> >
> > > For compound control (which have similar problems) I have quite strict
> > > requirements: the structure layout may not contain any holes, and I require (and
> > > test) that any reserved/padding fields at set to 0 by the driver and that it is
> > > documented that userspace sets it to 0 as well.
> > >
> > > My recommendation for public APIs that effectively return data structures
> > > is to:
> > >
> > > 1) ensure the layout is the same for 32 and 64 bit code,
>
> Yes, that's very important.
>
> > > 2) there are no holes, instead use reserved[] arrays instead,
>
> Fine with me.
>
Do we all agree I can't change the existing types, and we'll have to
live with holes ?
> > > 3) ensure that reserved fields are always set to 0 by the driver,
> > > and document that userspace sets it to 0 as well. You could chose
> > > to test for that and fail if it is not 0.
>
> In this case the fields are set by userspace, not by the driver.
> Documenting that applications must set them to 0 is a good idea.
>
> > > > Other structures are instead aligned to 4 bytes boundary without the
> > > > aligned(8) attribute specified, in example BLS:
> > > >
> > > > struct rkisp1_ext_params_bls_config {
> > > > struct rkisp1_ext_params_block_header header; /* 0 8 */
> > > > struct rkisp1_cif_isp_bls_config config; /* 8 28 */
> > > >
> > > > /* XXX last struct has 1 hole */
> > > >
> > > > /* size: 36, cachelines: 1, members: 2 */
> > > > /* member types with holes: 1, total: 1 */
> > > > /* last cacheline: 36 bytes */
> > > > };
> > > >
> > > > Which is not 8 bytes aligned, compared to the 40 bytes long aligned(8)
> > > > version here below:
> > > >
> > > > struct rkisp1_ext_params_bls_config {
> > > > struct rkisp1_ext_params_block_header header; /* 0 8 */
> > > > struct rkisp1_cif_isp_bls_config config; /* 8 28 */
> > > >
> > > > /* XXX last struct has 1 hole */
> > > >
> > > > /* size: 40, cachelines: 1, members: 2 */
> > > > /* padding: 4 */
> > > > /* member types with holes: 1, total: 1 */
> > > > /* last cacheline: 40 bytes */
> > > > } __attribute__((__aligned__(8)));
> > > >
> > > > Now, the question is if we want 8 bytes alignment for all structures
> > > > or not.
> > > >
> > > > 8-bytes alignment is significant when trying to read an 8-byte data
> > > > type from a non-8-bytes-aligned address but as far as I can tell there
> > > > are no u64 fields in the uAPI and the compiler would have aligned
> > > > them anyway, so this is not a concern.
> > > >
> > > > When it comes to 32-bit compatibility (32 bits userspace running on a
> > > > 64 bits kernel) I don't see any pointer in the uAPI whose size can
> > > > change between a 32-bit and a 64-bit system, and all types have their
> > > > size specified, so I don't think we would have any issue there.
> > >
> > > If there are no u64/s64 fields and no pointers, and you don't expect
> > > to see such things in the future, then there is no need to align to
> > > 8 bytes.
>
> I'd rather not make assumptions on what we will or will not see in
> future parameters blocks, and keep aligning all blocks to 8 bytes. I
> don't see any drawback in doing so.
>
A few extra bytes here and there, but I presume this won't make a big
difference. I agree with the better safe than sorry approach and I
will keep the aligned attribute.
> > > > The extensible data types are serialized in a u8[] data buffer, and
> > > > code can access any location within the array by dereferencing a u64
> > > > pointer, but there's nothing we can do to prevent this from happening.
> > > >
> > > > As of now, I'm missing the reason why we decided to align everything
> > > > to 8 bytes..
> > > >
> > > >>>> Did you check with pahole for holes etc. in the datastructures?
> > > >>>
> > > >>> That's a good idea in any case.
> > > >
> > > > As shown in the above examples, existing types have holes, but there's
> > > > nothing we can do about it. When embedded in the extensible types,
> > > > after the 8-bytes header, they extensible type gets aligned to the
> > > > size of the largest member, which is usually the 32-bits large (now
> > > > that I made the size member of the header 32-bits).
> > >
> > > As mentioned above, I strongly suggest to replace holes with reserved
> > > fields. It avoids potential future problems.
> >
> > Agreed, but unfortunately I cannot change the existing types
> > associated with V4L2_META_FMT_RK_ISP1_PARAMS..
> >
> > > >>>>> +} __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
