[libcamera-devel] [PATCH v1 0/9] Raspberry Pi: Horizontal blanking control

[Naushir Patuck]

Hi,

This series adds full automatic sensor horizontal blanking control (to compliment
the existing vertical blanking control) for exposure and/or frame duration calculations.

In the new calculations, we always prioritise extending vblank until it reaches its
limits, then extend hblank to make up the shortfall. This is to minimise the "wobble"
effect of the rolling shutter in the sensor. The rkisp1 and ipu3 IPAs are updated
to use the minimum reported hblank value in their calculations for the same reason.

Patches 1-2 adds a max line length field to the IPACameraSensorInfo and CameraMode structures.
Patchs 3-6 update the IPA and pipeline handler to pass around a current line length value.
Patches 7-8 update the calculations to return a hblank number to program in the sensor.
Patch 9 updates the embedded data parsers to extract current line length values.

Regards,
Naush

Naushir Patuck (9):
  camera_sensor: Add minimum and maximum line length to
    IPACameraSensorInfo
  ipa: raspberrypi: Add minimum and maximum line length fields to
    CameraMode
  ipa: raspberrypi: Pass lineLength into the CamHelper API
  pipeline: ipa: raspberrypi: Add HBLANK control to DelayedControls
  ipa: raspberrypi: Add pixel clock rate to the CameraMode structure
  ipa: raspberrypi: Add line length to DeviceStatus
  ipa: raspberrypi: Add line length calculations helper functions
  ipa: raspberrypi: Allow full line length control
  ipa: raspberrypi: Extract line length from the embedded data parser

 include/libcamera/ipa/core.mojom              | 21 +++--
 include/libcamera/ipa/raspberrypi.mojom       |  1 +
 src/ipa/ipu3/ipu3.cpp                         |  2 +-
 src/ipa/raspberrypi/cam_helper.cpp            | 81 ++++++++++++++-----
 src/ipa/raspberrypi/cam_helper.h              | 18 +++--
 src/ipa/raspberrypi/cam_helper_imx219.cpp     | 10 ++-
 src/ipa/raspberrypi/cam_helper_imx290.cpp     |  5 +-
 src/ipa/raspberrypi/cam_helper_imx296.cpp     | 10 ++-
 src/ipa/raspberrypi/cam_helper_imx477.cpp     | 39 +++++----
 src/ipa/raspberrypi/cam_helper_imx519.cpp     | 39 +++++----
 src/ipa/raspberrypi/cam_helper_ov5647.cpp     |  5 +-
 src/ipa/raspberrypi/cam_helper_ov9281.cpp     |  5 +-
 src/ipa/raspberrypi/controller/camera_mode.h  |  6 +-
 .../raspberrypi/controller/device_status.cpp  |  1 +
 .../raspberrypi/controller/device_status.h    |  4 +-
 src/ipa/raspberrypi/raspberrypi.cpp           | 61 ++++++++------
 src/ipa/rkisp1/rkisp1.cpp                     |  2 +-
 src/libcamera/camera_sensor.cpp               |  6 +-
 .../pipeline/raspberrypi/raspberrypi.cpp      |  1 +
 19 files changed, 216 insertions(+), 101 deletions(-)

-- 
2.25.1