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2021-11-15ipa: ipu3: Cache line duration at configure callJean-Michel Hautbois
We use the line duration several times in the IPAIPU3. Instead of recalculating it each time, cache the value as a utils::Duration. ExposureTime and FrameDuration units are in micro-seconds, cast the Duration accordingly. As sensorInfo is no longer used in updateSessionConfiguration remove the reference to it. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: Send color temperature in the metadataJean-Michel Hautbois
Now that the color temperature is updated per-frame, use the value and set the corresponding controls::ColourTemperature. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: awb: Add support for color temperatureJean-Michel Hautbois
The AWB estimates the color temperature, but it is not used at all. It can be useful for debug purpose at least, but also for lux estimation later, to be able to know the temperature estimated for a given frame. Add a new member to the IPAFrameContext::awb for this purpose, and update the value in AWB. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: agc: Store exposure in units of timeJean-Michel Hautbois
The minimum and maximum exposure are stored in lines. Replace it by values in time to simplify the calculations. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: agc: Update previous exposure valueJean-Michel Hautbois
Previously, the exposure value was calculated based on the estimated shutter time and gain applied. Now that we have the real values for the current frame, use those before estimating the next one and rename the variable accordingly. As the exposure value is updated in the beginning of the computation, there is no need to initialize effectiveExposureValue anymore in the configure call, and it can be a local variable and not a class variable anymore. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: agc: Improve gain calculationJean-Michel Hautbois
When an image is partially saturated, its brightness is not increasing linearly when the shutter time or gain increases. It is a big issue with a backlight as the algorithm is fading to darkness right now. Introduce a function to estimate the brightness of the frame, based on the current exposure/gain and loop on it several times to estimate it again and approach the non linear function. Inspired-by: 7de5506c30b3 ("libcamera: src: ipa: raspberrypi: agc: Improve gain update calculation for partly saturated images") Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-11-15ipa: ipu3: agc: Refactor ev gain calculation and testingJean-Michel Hautbois
When we compute the new gain, we use the iqMean_ and estimate an exposure value gain to apply. Return early when the gain is less than 1%. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: agc: Compute the gain for each frameJean-Michel Hautbois
Now that we have the real exposure applied at each frame, remove the early return based on a frame counter and compute the gain for each frame. Introduce a number of startup frames during which the filter speed is 1.0, meaning we apply instantly the exposure value calculated and not a slower filtered one. This is used to have a faster convergence, and those frames may be dropped in a future development to hide the convergance process from the viewer. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: agc: Limit the number of saturated cellsJean-Michel Hautbois
When the histogram is calculated, we check if a cell is saturated or not before cumulating its green value. This is wrong, and it can lead to an empty histogram in case of a fully saturated frame. Use a constant to limit the amount of pixels within a cell before considering it saturated. If at the end of the loop we still have an empty histogram, then make it a fully saturated one. Bug: https://bugs.libcamera.org/show_bug.cgi?id=84 Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: Use sensor controls to update frameContextJean-Michel Hautbois
The pipeline handler populates the new sensorControls ControlList, to have the effective exposure and gain values for the current frame. This is done when a statistics buffer is received. Make those values the frameContext::sensor values for the frame when the EventStatReady event is received. AGC also needs to use frameContext.sensor as its input values and frameContext.agc as its output values. Modify computeExposure by passing it the frameContext instead of individual exposure and gain values. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipu3: ipa: Report effective sensor controls with statistics to IPAHan-Lin Chen
The Intel close sourced IPA requires the effective controls applied to the sensor when the statistics are generated. Report effective sensor controls with the statistics to IPA. Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org> [Jean-Michel: Reword s/stastistics/statistics and move reset after IPA start] Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-15ipa: ipu3: Extend ipu3 ipa interface for sensor controlsHan-Lin Chen
IPU3Event and IPU3Action use single ControlList for both libcamera and V4L2 controls, and it's content could be either one based on the context. Extend IPU3Event and IPU3Action for sensor V4L2 controls, and preserve the original one for only libcamera Controls to make the content of an event more specific. Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org> [Jean-Michel: remove lensControls from the original patch] Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-11libcamera: pipeline: ipu3: Fix minCrop indentationKieran Bingham
When updating the controls the calculation for minCrop incorrectly indents the parameters to scaledBy(). Fix it. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-11-08android: Camera3RequestDescriptor: Provide a constructor for StreamBufferUmang Jain
Provide a constructor for StreamBuffer and use that while populating Camera3RequestDescriptor::buffers_ vector. Also provide the default move-constructor (required as StreamBuffer is stored in a vector in Camera3RequestDescriptor) and destructor for the StreamBuffer struct. Also declare a default move assignment operator and disable the copy constructor and move operator explicitly with LIBCAMERA_DISABLE_COPY(). While at it, initialize pointers members in the StreamBuffer struct to nullptr, with StreamBuffer::status set to Status::Success by default. Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2021-11-08android: mm: Null check for CameraBufferManagerUmang Jain
cros::CameraBufferManager can be nullptr if there is an error in its creation. Place a null-check guard to check it. Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-11-06ipa: ipu3: List the events in their order of callingJean-Michel Hautbois
The IPU3 IPA has three events which are handled from the pipeline handler. The events are received in the sequence, EventProcessControls, EventFillParams, and finally EventStatReady, while the code lists these in a different order. Update the flow of IPAIPU3::processEvent() to match the expected sequence of events, to help support the reader in interpreting the flow of events through the IPA. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2021-11-04libcamera: framebuffer: Fix isContiguous log messageKieran Bingham
The isContiguous debug message is inverted. Correct the logic. Reported-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02pipeline: raspberrypi: Fix rounding issue in findBestFormat()Naushir Patuck
The aspect ratio calculation divides two integer values then casts to a double. This might reduce precision when scoring for aspect rato differences. Fix this by casting the integer to a double before the division. Reported-by: Coverity CID=361652 Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02libcamera: ipa: raspberrypi: Add support for imx519 sensorArducam info
The necessary tuning file and CamHelper is added for the imx519 sensor. The imx519 is a 16MP rolling shutter sensor. To enable it, please add dtoverlay=imx519 to the /boot/config.txt file and reboot the Pi. Signed-off-by: Lee Jackson <info@arducam.com> Reviewed-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>
2021-11-02pipeline: raspberrypi: Account for a missing Unicam embedded data nodeNaushir Patuck
The unicam driver no longer registers an embedded data node if the sensor does not provide this stream. Account for this in the pipeline handler match routine by not assuming it is always present. Add a warning if Unicam and the CamHelper do not agree on the presense of sensor embedded data, and disable its usage in these cases. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02pipeline: raspberrypi: Remove "unpacked" format penalty in mode selectionNaushir Patuck
With the recent change to switch to programming the sensor device directly, the notion of packed vs unpacked modes are not relevent, since that is a Unicam format construct. Remove any scoring based on packed/unpacked modes. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02pipeline: raspberrypi: Convert the pipeline handler to use media controllerNaushir Patuck
Switch the pipeline handler to use the new Unicam media controller based driver. With this change, we directly talk to the sensor device driver to set controls and set/get formats in the pipeline handler. This change requires the accompanying Raspberry Pi linux kernel change at https://github.com/raspberrypi/linux/pull/4645. If this kernel change is not present, the pipeline handler will fail to run with an error message informing the user to update the kernel build. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02pipeline: raspberrypi: Apply sensor flips at the start of configure()Naushir Patuck
Sensor flips might change the Bayer order of the requested format. The existing code would set a sensor format along with the appropriate Unicam and ISP input formats, but reset the latter two on start() once the flips had been requested. We can now set the sensor flips just before we set the sensor mode in configure(), thereby not needing the second pair of format sets in start(). Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.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>
2021-11-02libcamera: bayer_format: Add PixelFormat conversion helpers to BayerFormat classNaushir Patuck
Add BayerFormat::toPixelFormat() and BayerFormat::fromPixelFormat() helper functions to convert between BayerFormat and PixelFormat types. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [Kieran: Minor checkstyle fix] Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02libcamera: bayer_format: Add unpacked mono 10-bit format to the conversion tableNaushir Patuck
Add BayerFormat conversions for formats::R10 (10-bit unpacked) format. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02libcamera: bayer_format: Rework BayerFormat conversion tableNaushir Patuck
Rename the bayerToV4l2 conversion table to bayerToFormat. Update the table to hold both the PixelFormat and V4L2PixelFormat conversions for a given BayerFormat. This will allow converting between BayerFormat and PixelFormat types in a subsequent change. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02libcamera: bayer_format: Turn BayerFormat::Packing into scoped enumLaurent Pinchart
The unscoped enum BayerFormat::Packing leads to usage of the ambiguous BayerFormat::None enumerator. Turn the enumeration into a scoped enum to force usage of BayerFormat::Packing::None, and drop the now redundant "Packed" suffix for the CSI2 and IPU3 packing. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Naushir Patuck <naush@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>
2021-11-02libcamera: formats: Add R10_CSI2P formatNaushir Patuck
This new formats corresponds to the V4L2 V4L2_PIX_FMT_Y10P format, and is a CSI2-packed version of the DRM_FORMAT_R10 format. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-11-02libcamera: formats: Add R10 and R12 formatsLaurent Pinchart
These new formats corresponds to the V4L2 V4L2_PIX_FMT_Y10 and V4L2_PIX_FMT_Y12 formats, and are the little-endian version of the DRM_FORMAT_R10 and DRM_FORMAT_R12 formats. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Naushir Patuck <naush@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>
2021-10-27libcamera: pixel_format: remove duplicated return documentationKieran Bingham
The PixelFormat::toString() has two \return statements in its doxygen documentation. Remove the redundant one. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-10-27libcamera: v4l2_videodevice: provide hasMediaController()Kieran Bingham
The V4L2Capability has helpers to interogate the capabilities of a device. V4L2VideoDevice::enumPixelformats accesses the raw capabilites to check if the device is supported by a MediaController device. Provide a helper, and update the usage. Reviewed-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: agc: Clamp shutter speedJean-Michel Hautbois
In case the maximum exposure received from the sensor is very high, we can have a very high shutter speed with a small analogue gain, and it may result in very slow framerate. We are not really supporting it for the moment, so clamp the shutter speed to an arbitrary value of 60ms. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Tested-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: ipa_context: Fix doxygen warningsKieran Bingham
The IPAFrameContext uses unnamed structures to group items. Doxygen doesn't seem to support this properly, documentation isn't properly generated and warnings are output during compilation. Suppress the warning with a workaround that still results in incorrect generated documentation until Doxygen gets fixed. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> [JMH: Fix doxygen variable usage] Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: Implement an empty stop() functionJean-Michel Hautbois
While the stop() function does not currently perform any action, it forms part of the IPA interface and is a public function in the class. Promote it to a full (but basic) function implementation and begin the documentation accordingly so that there is an appropriate stub to perform stop operations if they come up. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-10-26ipa: ipu3: Fix badly documented context variablesJean-Michel Hautbois
Doxygen warns us because the structures are referenced as \struct while they should be \var. Fix it. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: Isolate ipa_context documentationKieran Bingham
The IPU3 IPA core is growing with additional documentation. The ipa_context documentation is stored here, but it pushes the IPU3 documentation and implementation further from the head of the file. Furthermore, the ipa_context documentation is outside of the ipa::ipu3 namespace and isn't identified correctly by Doxygen. Move the ipa_context to its own compilation object even though there isn't any code, but to maintain consistency with our documentation model. Correctly re-introduce the documentation into the libcamera::ipa::ipu3 namespace during the move. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
2021-10-26ipa: ipu3: algorithms: awb: Privatize internal structuresKieran Bingham
The struct RGB and struct AwbStatus are used only by the internal implementation of the AWB algorithm module. Move them into the private class declaration. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
2021-10-26ipa: ipu3: Fix the IPU3 AWB doxygen referencesKieran Bingham
The AWB AwbStatus structure is contained within the Awb class. Fix the Doxygen reference so that it can be found. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
2021-10-26ipa: ipu3: ipa_context: Fix file referenceKieran Bingham
The ipa_context.h entry incorrectly referenced its file name. Fix it. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
2021-10-26Documentation: IPU3 IPA Design guideKieran Bingham
The IPU3 IPA implements the basic 3A using the ImgU ISP. Provide an overview document to describe its operations, and provide a block diagram to help visualise how the components are put together to assist any new developers exploring the code. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
2021-10-26ipa: ipu3: tonemapping: Add the documentation for ToneMappingJean-Michel Hautbois
The tone mapping algorithm is currently undocumented. Provide an introduction and overview to the implementation as the class definition and document how the algorithm operates in the process and prepare methods. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: tonemapping: Implement configure callJean-Michel Hautbois
Let the algorithm perform its initial configuration. Implement configure() to set a default gamma value and let process do the updates needed. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: tonemapping: Generate the LUT only on gamma changeJean-Michel Hautbois
The tone mapping algorithm calculates the gamma curve for every frame, regardless of whether the gamma value has changed or not. This issue is exasperated as we currently hardcode the gamma to a single value. Optimise the implementation to only recalculate the look up table when the gamma setting is changed, and store the gamma setting of the LUT curve as part of the IPA context. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: agc: Document AGC mean-based algorithmJean-Michel Hautbois
The AGC class was not documented while developing. Extend that to reference the origins of the implementation, and improve the descriptions on how the algorithm operates internally. While at it, rename the functions which have bad names. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: awb: Reword accumulator documentationJean-Michel Hautbois
Now that we moved the diagram into the AWB class documentation, reword the accumulator documentation to make it clear it is not meant to be used only in AWB. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-10-26ipa: ipu3: awb: Add AWB class documentationJean-Michel Hautbois
The AWB algorithm is based on the Grey world algorithm and uses the statistics generated by the ImgU for that. Explain how it uses those, and reference the original algorithm at the same time. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-10-26ipa: ipu3: Explicitly use the statistics parameterJean-Michel Hautbois
The stats pointer is marked as [[maybe_unused]]. This is a leftover from a previous commit which was here to keep the compatibility while transitioning to the new iterative algorithms. Remove this attribute to make it explicit that stats are really used to feed the algorithms. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-10-26ipa: ipu3: Document the IPAIPU3 classJean-Michel Hautbois
Clarify the roles and interactions between the pipeline handler events and the algorithm calls by documenting all the remaining functions of the class. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-10-26ipa: ipu3: Document IPAIPU3::configureJean-Michel Hautbois
Further extend the documentation for the IPAIPU3::configure operation. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-10-26ipa: ipu3: Document IPAIPU3 class interfaceJean-Michel Hautbois
The IPU3 IPA is maturing to a modular and extensible system capable of handling specific algorithms for the processing blocks on the ImgU. Provide a top-level class documentation to provide an overview of the IPA, detailing what events are used and what algorithms are currently supported, as well as the limitations currently imposed. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>