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We are ready to introduce algorithms now. First, let's create
algorithms. The algorithms are not called yet, calls to them will be
added in followup patches.
The maximum number of contexts is set to the same value as in hardware
pipelines.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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This patch adds frame and bufferId arguments to stats related calls.
Although the parameters are currently unused, because frame ids are not
tracked and used and the stats buffer is passed around directly rather
than being referred by its id, they bring the internal APIs closer to
their counterparts in hardware pipelines.
It serves as a preparation for followup patches that will introduce:
- Frame number tracking in order to switch to DelayedControls
(software ISP TODO #11 + #12).
- A ring buffer for stats in order to improve passing the stats
(software ISP TODO #2).
Frame and buffer ids are unrelated for the given purposes but since they
are passed together at the same places, the change is implemented as a
single patch rather than two, basically the same, patches.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The Module class is a base class for all IPA modules.
In addition, implement logPrefix() of the module for the softIPA.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Software ISP image processing algorithms are currently defined in a
simplified way, different from other libcamera pipelines. This is not
good for several reasons:
- It makes the software ISP code harder to understand due to its
different structuring.
- Adding more algorithms may make the code harder to understand
generally.
- Mass libcamera code changes may not be easily applicable to software
ISP.
- Algorithm sharing with other pipelines is not easily possible.
This patch introduces basic software ISP IPA skeletons structured
similarly to the other pipelines. The newly added files are currently
not used or compiled and the general skeleton structures don't contain
anything particular. It is just a preparation step for a larger
refactoring and the code will be actually used and extended as needed in
followup patches.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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IPA modules use custom namespaces for all their internal components to
avoid namespace clashes. The simple IPA module for the software ISP uses
libcamera::ipa::soft for this purpose. It however defines an internal
class named BlackLevel in the root of the libcamera namespace, making it
prone to clashes. Move it to the ipa::soft namespace along with the rest
of the code.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Provide the Sony IMX214 camera sensor properties and registration with
libipa for the gain code helpers.
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add a loader that is capable of loading polynomial coefficients from the
tuning files. The polynomial is sampled at load time to reduce the
computational overhead at runtime.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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For the LSC algorithm to dynamically calculate the LSC tables based on
the sensor size and the crop rectangle it needs access to that data.
Provide access to it by adding the sensorInfo object to the context.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Add a basic class to represent polynomials as specified in the DNG spec
for vignetting correction.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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In preparation for supporting polynomial LSC data, move the current
loader into its own helper class.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Now, that the generic interpolator is available, use it to do the
interpolation of the lens shading tables. This makes the algorithm
easier to read and remove some duplicate code.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The MatrixInterpolator is no longer used. Remove it.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Replace all occurrences of the MatrixInterpolator with the generic one.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The MatrixInterpolator is great for interpolation of matrices for
different color temperatures. It has however one limitation - it can
only handle matrices. For LSC it would be great to interpolate the LSC
tables (or even polynomials) using the same approach. Add a generic
Interpolator class based on the existing MatrixInterpolator. This class
can be adapted to any other type using partial template specialization.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Report the default sensor black level reported by the datasheet.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add support for the IMX283 sensor for the VC4 target.
Signed-off-by: will whang <will@willwhang.com>
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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When a user is taking control of exposure and gain, setting them
manually, we set the AGC "stable region" to zero. This means that any
user changes, however small, will be applied, and they won't be
regarded as "too small to bother with".
Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The ipa_interface.h file includes a number of headers that are not
directly used. Remove them, and add them to the source files that
include ipa_interface.h as required.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The includes that are not used can be removed. And two identified
missing includes (directly used but available only through other
includes) are added.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The LSP autoformatter doesn't like some of the current formatting, let's
make it happier. Note that not all of its suggestions were accepted
because readability is preferred and adjusting .clang-format may not be
easy or possible.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The includes that are not used can be removed.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The LSP autoformatter doesn't like some of the current formatting, let's
make it happier. Note that not all of its suggestions were accepted
because readability is preferred and adjusting .clang-format may not be
easy or possible.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The includes that are not used can be removed.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Extend the RkISP1 BLC algorithm to use the ISP 'companding' block for
versions of the ISP (such as the one on the i.MX8MP) that lack the
dedicated BLS block but implement BLS as part of the companding block.
As access to the companding block requires the extensible parameters
format, disable BLC when using the legacy parameters format on i.MX8MP
to avoid crashes at runtime with older kernels.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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Add a compand feature flag to the hardware settings section of the IPA
context, so that we can act accordingly for black level subtraction, and
to pave the way to skipping companding appropriately when support for it
is added.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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Extend the RkISP1 parameters helper with support for the new companding
blocks.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Use the new ISP parameters abstraction class RkISP1Params to access the
ISP parameters in the IPA algorithms. The class replaces the pointer to
the rkisp1_params_cfg structure passed to the algorithms' prepare()
function, and is used to access individual parameters blocks.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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Individual algorithms of the rkisp1 IPA module access their
corresponding ISP parameters through the top-level structure
rkisp1_params_cfg. This will not work anymore with the new parameters
format. In order to ease the transition to the new format, abstract the
ISP parameters in a new RkISP1Params class that offers the same
interface regardless of the format.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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The ISP parameters buffer currently has a fixed payload size, which is
hardcoded in the pipeline handler. To prepare for support of the
extensible parameters format that has a variable payload size, pass the
size from the IPA module to the pipeline handler explicitly. Keep the
size hardcoded to sizeof(struct rkisp1_params_cfg) for now, this will be
udpated later.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The rkisp1 driver supports two formats for the ISP parameters buffer,
the legacy fixed format and the new extensible format. In preparation of
support for the new format, pass the parameters buffer format from the
pipeline handler to the IPA module and store it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The constructor reference was missing, causing the constructor
documentation to appear in blackLevel() documentation.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The libcamera coding style groups the C and C++ standard library headers
in a single group. Fix the few offenders in the source tree.
While at it, add a missing blank line between header groups in a
separate location.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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The libcamera_generated_ipa_headers variable, containing the list of
generated IPA headers, is listed in the sources of IPA modules, as well
as IPA tests. This was done to ensure that the modules and tests get
rebuilt when the generate IPA headers change. However, the dependency is
already handled through the libcamera_private dependency object,
specified for all those modules and tests. There's no need to list the
IPA generated headers as sources. Drop them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The documentation for the blackLevel_ member is very terse. Reference
the more complete documentation of the sibling blackLevel() member
function to provide more information.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Unlike in C where they have been standardized since C99, variable-length
arrays in C++ are an extension supported by gcc and clang. Clang started
warning about this with -Wall in version 18:
src/libcamera/ipc_unixsocket.cpp:250:11: error: variable length arrays in C++ are a Clang extension [-Werror,-Wvla-cxx-extension]
250 | char buf[CMSG_SPACE(num * sizeof(uint32_t))];
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
One simple option is to disable the warning. However, usage of VLAs in
C++ is discouraged by some, usually due to security reasons, based on
the rationale that developers are often unaware of unintentional use of
VLAs and how they may affect the security of the code when the array
size is not properly validated.
This rationale may sound dubious, as the most commonly proposed fix is
to replace VLAs with vectors (or just arrays dynamically allocated with
new() wrapped in unique pointers), without adding any size validation.
This will not produce much better results. However, keeping the VLA
warning and converting the code to dynamic allocation may still be
slightly better, as it can prompt developers to notice VLAs and check if
size validation is required.
For these reasons, convert all VLAs to std::vector. Most of the VLAs
don't need extra size validation, as the size is bound through different
constraints (e.g. image width for line buffers). An arguable exception
may be the buffers in IPCUnixSocket::sendData() and
IPCUnixSocket::recvData() as the number of fds is not bound-checked
locally, but we will run out of file descriptors before we could
overflow the buffer size calculation.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Acked-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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Provide the onsemi AR0144 camera sensor properties and registration with
libipa for the gain code helpers.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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When the colour temperature does not change between frames, the ccm
inside the frame context is not updated and the metadata contains
invalid data. Fix that by caching the ccm inside the active state.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
[Kieran: Remove spurious [[maybe_unused]] addition]
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Only the first three entries of the matrix were set. Fix that.
Fixes: cbfdfa42cacc ("ipa: rkisp1: algorithms: Add crosstalk algorithm")
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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When the colour temperature estimation gets skipped, the metadata isn't
populated. Fix that by filling the metadata early in the function.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The frame context is used to store data used for processing that frame.
It is later used to either act as input for other algorithms or to fill
the metadata. For the colour temperature this is not needed, as the
meatadata shall not contain the value that was active when the image was
processed, but the value that was calculated based on the statistics for
that image. This is no functional change.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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When the color gains are set manually it is possible to specify a
gain that wrapped the hardware limits. It would also be possible to
further tune the floating point limits, but that is an error prone
approach. So the limits are imposed on the integers, just before writing
to the hardware. This noticeably reduces some oscillations in the awb
regulation.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add black level value for OV5675 camera sensor.
According to datasheet, default value is 0x10, 10 bits width.
However, Linux kernel driver initializes black level target value
to 0x40. Set the value to the same as in kernel driver, but scaled
to 16 bits.
Signed-off-by: Daniel Semkowicz <dse@thaumatec.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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We have all these neat tuning files. Unfortunately we forgot to install
many of them.
Signed-off-by: Robert Mader <robert.mader@collabora.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The context parameter of the BlackLevelCorrection::init() function is
used. Drop the [[maybe_unused]] attribute.
Fixes: 50c28e135100 ("ipa: rkisp1: blc: Query black levels from camera sensor helper")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Move black levels for tuning files that contained a BLC block into
the camera sensor helpers.
ov4689.yaml had 66@12bit while the datasheet states 64@12bit. Use the
value from the datasheet (scaled to 16bit).
ov5640.yaml had 256@12bit while the datasheet states 16@10bit. Looking
at the commit message the 256 most likely stems from the imx219 tuning
file and 16@10bit is the same as the 64@12bit from the ov4689. This
seems more likely and is therefore used.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The black levels for imx219 and imx258 are now contained in the camera
sensor helpers. Remove them from the tuning file for the imx219. Add a
BLC entry to the imx258 tuning file.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add sensor black levels to the metadata of the rkisp1 pipeline.
Additionally enable raw support for this algorithm and add it to
uncalibrated.yaml, so that black levels get reported when capturing
tuning images. This is a bit of a hack, because no actual black level
correction is taking place in raw mode, but it is the easiest way to get
blacklevel reported for raw streams.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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As the camera sensor helper now has the ability to provide the black
level, use it. Black levels can still be overwritten by the tuning
file, but the direction is to remove them from the tuning files and move
them into the sensor helpers.
Additionally interpret all values based on 16bits. The conversion to the
scale required by the hardware is done in process(). It ensures all the
values inside libcamera are the same scale and is in preparation for the
i.MX8MP where black levels are based on a 20bit scale. Note that this
breaks existing tuning files. The tuning files distributed with
libcamera will be fixed in a later patch.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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To be able to query the black levels, the black level correction
algorithm needs access to the camera sensor helper. Allow this by moving
the camHelper_ member from IPARkISP1 into IPAContext.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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For a proper tuning process we need to know the sensor black levels. In
most cases these are fixed and not reported by the kernel driver. Store
them inside the sensor helpers for later retrieval by the algorithms.
Add black level value corresponding to the data pedestal for three
initial sensors as documented in the datasheets. More should be added,
eventually filling the gaps for all supported sensors.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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