01.08.2020 00:32, Sowjanya Komatineni пишет: > CSI MIPI pads need to be enabled and calibrated for capturing from > the external sensor or transmitter. > > MIPI CAL unit calibrates MIPI pads pull-up, pull-down and termination > impedances. Calibration is done by co-work of MIPI BIAS pad and MIPI > CAL control unit. > > Triggering calibration start can happen any time after MIPI pads are > enabled but calibration results will be latched and applied to MIPI > pads by MIPI CAL unit only when the link is in LP11 state and then > calibration status register gets updated. > > This patch enables CSI MIPI pads and calibrates them during streaming. > > Tegra CSI receiver is able to catch the very first clock transition. > So, CSI receiver is always enabled prior to sensor streaming and > trigger of calibration start is done during CSI subdev streaming and > status of calibration is verified after sensor stream on. > > Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx> > --- > drivers/staging/media/tegra-video/TODO | 1 - > drivers/staging/media/tegra-video/csi.c | 61 +++++++++++++++++++++++++++++++-- > drivers/staging/media/tegra-video/csi.h | 2 ++ > drivers/staging/media/tegra-video/vi.c | 28 ++++++++++++--- > 4 files changed, 84 insertions(+), 8 deletions(-) Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>
