Hi!
The background for these patches is that our PCB interface between the SAMA5D3 and the ds90c185 lvds encoder is only using 16 bits, and this has to be described somewhere, or the atmel-hlcdc driver have no chance of selecting the correct output mode. Since we have similar problems with a tda19988 HDMI encoder I added patches to override the atmel-hlcdc output format via DT properties compatible with the media video-interface binding and things start to play together.
There is still an open question regardning the binding in patch 2/3, where Laurent wondered about plans Sakari might have for explicit bus types for parallel buses. See https://lkml.org/lkml/2018/8/3/278
Cheers, Peter
Changes since (the shortened) v5 https://lkml.org/lkml/2018/8/3/182 - add reg properties (and #*-cells) to the example in patch 2/3 - prohibit bus-width 0 in the device-tree in patch 3/3 - added reviewed-by from Jacopo to patch 2/3 and 3/3
Peter Rosin (3): dt-bindings: display: bridge: lvds-transmitter: add ti,ds90c185 dt-bindings: display: atmel: optional video-interface of endpoints drm/atmel-hlcdc: support bus-width (12/16/18/24) in endpoint nodes
.../devicetree/bindings/display/atmel/hlcdc-dc.txt | 30 ++++++++++ .../bindings/display/bridge/lvds-transmitter.txt | 8 ++- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 70 +++++++++++++++------- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 1 + drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 70 +++++++++++++++++++--- 5 files changed, 151 insertions(+), 28 deletions(-)