[PATCH v8 0/4] drm/atmel-hlcdc: bus-width override support

From: Peter Rosin
Date: Fri Aug 10 2018 - 09:04:18 EST


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.


Changes since v7 https://lkml.org/lkml/2018/8/4/288
- The ep device_node was leaked in v7 patch 3/3, so add patch 3/4
which simplifies fixing this in patch 4/4 (and adds flexibility)
and adjust patch 4/4 to the changes done in the new 3/4.
- return -ENOMEM on allocation failure in patch 4/4

Changes since v6 https://lkml.org/lkml/2018/8/3/333
- zap bus-type from the binding in patch 2/3

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 (4):
dt-bindings: display: bridge: lvds-transmitter: add ti,ds90c185
dt-bindings: display: atmel: optional video-interface of endpoints
drm/atmel-hlcdc: iterate over all output endpoints
drm/atmel-hlcdc: support bus-width (12/16/18/24) in endpoint nodes

.../devicetree/bindings/display/atmel/hlcdc-dc.txt | 28 +++++++
.../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 | 98 ++++++++++++++++++----
5 files changed, 170 insertions(+), 35 deletions(-)