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[v2,0/5] i2c: adv748x: add support for CSI-2 TXA to work in 1-, 2- and 4-lane mode

Message ID 20181004204138.2784-1-niklas.soderlund@ragnatech.se (mailing list archive)
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Series i2c: adv748x: add support for CSI-2 TXA to work in 1-, 2- and 4-lane mode | expand

Message

Niklas Söderlund Oct. 4, 2018, 8:41 p.m. UTC 
From: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

Hi,

This series allows the TXA CSI-2 transmitter of the adv748x to function
in 1-, 2- and 4- lane mode. Currently the driver fixes the hardware in
4-lane mode. The driver looks at the standard DT property 'data-lanes'
to determine which mode it should operate in.

Patch 1/5 lists the 'data-lanes' DT property as mandatory for endpoints 
describing the CSI-2 transmitters. Patch 2/5 and 3/5 refactors the 
initialization sequence of the adv748x to be able to reuse more code. 
Patch 4/5 adds the DT parsing and storing of the number of lanes. Patch
5/5 merges the TXA and TXB power up/down procedure while also taking the 
configurable number of lanes into account.

The series is based on the latest media-tree master and is tested on
Renesas M3-N in 1-, 2- and 4- lane mode.

Niklas Söderlund (5):
  dt-bindings: adv748x: make data-lanes property mandatory for CSI-2
    endpoints
  i2c: adv748x: reorder register writes for CSI-2 transmitters
    initialization
  i2c: adv748x: reuse power up sequence when initializing CSI-2
  i2c: adv748x: store number of CSI-2 lanes described in device tree
  i2c: adv748x: configure number of lanes used for TXA CSI-2 transmitter

 .../devicetree/bindings/media/i2c/adv748x.txt |   3 +
 drivers/media/i2c/adv748x/adv748x-core.c      | 207 ++++++++++--------
 drivers/media/i2c/adv748x/adv748x.h           |   1 +
 3 files changed, 122 insertions(+), 89 deletions(-)