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Sometimes the ISP produces statistics only with a subset of statistic
types being valid. It doesn't happen normally, but was observed in the
wild. Check for the RKISP1_CIF_ISP_STAT_AWB bit to prevent using invalid
or outdated data. As it doesn't happen regularly add an error message to
get notified when it happens.
For simpler code structure, the ColourTemperature metadata entry gets
written unconditionally and overwritten later if needed.
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>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Sometimes the ISP produces statistics only with a subset of statistic
types being valid. It doesn't happen normally, but was observed in the
wild. Check for the RKISP1_CIF_ISP_STAT_AUTOEXP bit to prevent using
invalid or outdated data. As it doesn't happen regularly add an error
message to get notified when it happens.
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>
Reviewed-by: Paul Elder <paul.elder@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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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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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 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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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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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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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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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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The frame context agc.update variable is used to indicate if the ISP
histogram metering parameters need to be updated. Rename it to
updateMetering to make usage more explicit.
Suggested-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The AGC algorithm implements the AeEnable control at runtime. Move the
declaration of the control from the IPA module to the algorithm.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The sensor's maximum shutter speed is clamped by the maximum frame
duration specified in requests. If the requested maximum frame duration
is lower than the sensor's minimum shutter speed, the Agc::process()
function will pass a minimum value higher than the maximum to the
setLimits() function, resulting in an assertion failure. Fix it by
clamping the value to both the lower and the upper bounds.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The AGC active state and frame context both contain a variable named
maxShutterSpeed. The variable is used to limit the maximum shutter speed
when computing the exposure time and gains, but stores the maximum frame
duration, not clamped by the sensor's maximum shutter speed. Rename it
to maxFrameDuration.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The effective exposure value for each frame is split into shutter time,
analog gain and digital gain based on the AGC constraint mode and
exposure mode. The algorithm uses the modes from the active state, which
tracks the latest queued request, instead of the frame context, which
tracks the value of the controls requested for that frame. Fix it by
using the correct modes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The condition
if (std::pow(std::floor(root), 2) < factor)
predivider = static_cast<uint8_t>(std::ceil(root));
else
predivider = static_cast<uint8_t>(std::floor(root));
can only be false when the factor's root is an integer. In that case,
std::ceil(root) and std::floor(root) will be equal. The computation can
thus be simplified by always rounding up.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The ISP histogram parameters depends on the AE metering mode, but not on
the other AE algorithm controls. The exposure mode, constraints mode and
frame duration limits influence the behaviour of the algorithm, but not
the histogram computation parameters. Update the histogram parameters
only when AE metering mode changes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The Agc::computeHistogramPredivider() function doesn't need to modify
its size parameter. Make it const.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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When no metering modes are specified in the tuning file, the AGC
initialzation fails with
[0:00:46.148508875] [209] ERROR RkISP1Agc agc.cpp:46 'AeMeteringMode' parameter not found in tuning file
which results in a camera initialization failure. Fix it by downgrading
the error into a warning, and continuing the AGC initialization with the
default metering mode.
Fixes: 35233938ee5d ("ipa: rkisp1: agc: Read histogram weights from tuning file")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Add an algorithm module to the rkisp1 IPA for crosstalk correction.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.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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Plumb controls for setting metering mode, exposure mode, constraint
mode, and frame duration limits. Also report them as available controls,
as well as in metadata.
While at it, add the missing #include for tuple, as a std::tie is used.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add support to the rkisp1 AGC to read histogram weights from the tuning
file. As controls for selecting the metering mode are not yet supported,
for now hardcode the matrix metering mode, which is the same as what the
AGC previously hardcoded.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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A few function parameters are marked with [[maybe_unused]] but are
actually used. Drop the attribute.
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>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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convertContrast() and convertSaturation() are equal. Merge them into
one.
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>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Use a anonymous namespace instead of the static keyword to limity symbol
visibility.
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>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Replace one occurrence of the auto type qualifier with the explicit type
it represents to increase readability.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The values for the default gamma table are stored in an array that is
never modified. Mark it as static constexpr to facilitate optimizations.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Use the Doygen \copydoc command instead of duplicating documentation.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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A few function parameters are marked with [[maybe_unused]] but are
actually used. Drop the attribute.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Fix a few assorted typographical issues:
- Sentences should end with a period.
- Paragraphs should be separated by a blank line, and there should be no
line break within a paragraph.
- Doxygen lists need a list marker ('-' or '*', use '-' here).
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Default control values were not applied to activeState. This had no negative
side effects in the first place, as the hardware defaults were used. The issue
became visible, when only one of the controls was set at runtime. In that case
the params for the other values were overwritten with 0 (reset value of
activeState) resulting in a black image.
While at it, only add the controls to the controls map if the algorithm is
contained in the tuning file.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add a gamma algorithm for the rkisp1. It defaults to a gamma of 2.2 which
closely resembles sRGB. No seperate sRGB mode was implemented because the pwl
that models the gamma curve is so coarse that there is basically no difference
between srgb and gamma=2.2. The default can be overridden within the tuning
file or set at runtime using the gamma control.
The gamma algorithm is not enabled by default. This will be done in future
tuning file updates.
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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This histogram reported by the rkisp1 hardware is 20 bits, where the
upper 16 bits are meaningful integer data and the lower 4 bits are
fractional and meant to be discarded. Remove these 4 bits when
construction the histogram.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Source files in libcamera start by a comment block header, which
includes the file name and a one-line description of the file contents.
While the latter is useful to get a quick overview of the file contents
at a glance, the former is mostly a source of inconvenience. The name in
the comments can easily get out of sync with the file name when files
are renamed, and copy & paste during development have often lead to
incorrect names being used to start with.
Readers of the source code are expected to know which file they're
looking it. Drop the file name from the header comment block.
The change was generated with the following script:
----------------------------------------
dirs="include/libcamera src test utils"
declare -rA patterns=(
['c']=' \* '
['cpp']=' \* '
['h']=' \* '
['py']='# '
['sh']='# '
)
for ext in ${!patterns[@]} ; do
files=$(for dir in $dirs ; do find $dir -name "*.${ext}" ; done)
pattern=${patterns[${ext}]}
for file in $files ; do
name=$(basename ${file})
sed -i "s/^\(${pattern}\)${name} - /\1/" "$file"
done
done
----------------------------------------
This misses several files that are out of sync with the comment block
header. Those will be addressed separately and manually.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Now that the rkisp1 Agc algorithm is a derivation of MeanLuminanceAgc
we can remove the bespoke functions from the IPA's class.
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Now that we have a AgcMeanLuminance class that centralises our AEGC
algorithm, derive the RkISP1's Agc class from it and plumb in the
necessary framework to enable it to be used. For simplicities sake
this commit switches the algorithm to use the derived class, but
does not remove the bespoke functions at this time.
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The histogram weights are initialized to hardcoded 1's for each
histogram grid cell. The code uses the wrong variable for the grid size,
resulting in some weights having a 0 value. Fix it.
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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Versions of the ISP differ in the processing blocks they include, as
well as in the implementation of some of those blocks. In particular,
they have different numbers of histogram bins oe AE statistics cells.
The algorithms take these differences into account by checking the ISP
version reported by the driver.
These checks are currently scattered in multiple places. Centralize them
in the IPARkISP1::init() function, and store the version-dependent
hardware parameters in the IPA context, accessible by all algorithms.
While at it, drop the IPASessionConfiguration::hw member that stores the
revision number, unused by the algorithms. It can be added back laer to
the IPAHwSettings structure if needed.
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 RkISP1 statistics structure contains multiple arrays whose length
varies depending on the hardware revision. Accessing those arrays is
error-prone, wrap them in spans at the top level to reduce risks of
out-of-bound accesses.
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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Commit a3178dd0391f ("ipa: rkisp1: agc: drop hard-coded analogue gain range")
removed both minimum and maximum limits for the analogue gain value.
However, as some sensors can potentially have a minimum gain lower than
1.0, restore the check for the minimum limit.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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As the sensor's analogue gain range is known (read-out in
IPARkISP1::configure()), drop the limiting hard-coded range.
This enables better performance in low-light conditions for sensors with
a higher gain (e.g. the imx327).
Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The RkISP1 implementation of the LensShadingCorrection algorithm has been
made adaptive to the scene color temperature in commit 14c869c00fdd ("ipa:
rkisp1: Take into account color temperature during LSC algorithm").
The LSC algorithm interpolates the correction factors using the
table's reference color temperatures. When calculating the interpolation
coefficients, an unintended integer division makes both coefficient
zeros resulting in a completely black image.
Fix this by type casting to double one of the division operands.
Fixes: 14c869c00fdd ("ipa: rkisp1: Take into account color temperature during LSC algorithm")
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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