Hello!
This is the series of patches that will add support for the Cadence's DPI/DP
bridge. Please note that this is a preliminary version of the driver and there
will be more patches in the future with updates, fixes and improvements.
Please keep that in mind when looking at FIXME/TODO/XXX comments.
Initially, MHDP driver was developed as a DRM bridge driver and was planed to
be placed in drivers/gpu/drm/bridge/mhdp.c. However, there was already
a driver for Cadence's DP controller developed by RockChip, but that driver
uses the different DRM framework and looks like a part of a bigger system.
Both controllers (including firmware) are quite different internally
(MST/FEC/DSC support, link training done by driver, additional commands, IRQ's
etc.) but they have similar register map, except for Framer/Streamer (which is
noticeably different), so they appear similar.
The following patches contain:
- Moving common code to drivers/gpu/drm/bridge/cdns-mhdp-common.* and
modifying it a bit (mostly new prefixes for functions and data types) so it
can be used by two, higher level, drivers.
- Modifying existing RockChip's DP driver to use the common code after changes
made to it (use the new cdns_mhdp_device structure and new function names).
- Modifying DRM helpers a bit. Some are required for new driver, some are
updates from DP 1.2 to 1.3 or 1.4.
- Adding documentation for device tree bindings.
- Adding preliminary Cadence DPI/DP bridge driver.
Some of the things that will be added later on include (but are not limited
to):
- Support for Cadence SD0801 PHY (PHY's driver should be on the way by now)
- SST audio support
- MST support
- DSC support
- FEC support
- HDCP support
Changes in v2:
- Added actual description of what the patch contains, what is it for and
what's going on here in general.
- New structure. Now we have one common low level driver + two high level
drivers - one for RockChip with minimum changes and one, more general, for
Cadence.
- Dropped some changes made to DRM helpers.
- Updated the device tree bindings document.
Damian Kos (1):
drm/rockchip: moved cdns mhdp dpi/dp bridge low driver to a new
location
Quentin Schulz (4):
drm/dp: fix link probing for devices supporting DP 1.4+
drm/dp: make dp_link_status and dp_get_lane_status usable from outside
of the core
dt-bindings: drm/bridge Document Cadence MHDP DPI/DP bridge bindings
drm/bridge: add preliminary driver for cadence dpi/dp bridge
.../bindings/display/bridge/cdns,mhdp.txt | 43 +
drivers/gpu/drm/bridge/Kconfig | 7 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/cdns-mhdp-common.c | 1087 +++++++++++++++
.../cdns-mhdp-common.h} | 134 +-
drivers/gpu/drm/bridge/cdns-mhdp.c | 1233 +++++++++++++++++
drivers/gpu/drm/drm_dp_helper.c | 50 +-
drivers/gpu/drm/rockchip/Kconfig | 1 +
drivers/gpu/drm/rockchip/Makefile | 4 +-
drivers/gpu/drm/rockchip/cdn-dp-core.c | 220 +--
drivers/gpu/drm/rockchip/cdn-dp-core.h | 40 +-
drivers/gpu/drm/rockchip/cdn-dp-reg.c | 969 -------------
include/drm/drm_dp_helper.h | 4 +
13 files changed, 2648 insertions(+), 1145 deletions(-)
create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt
create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp-common.c
rename drivers/gpu/drm/{rockchip/cdn-dp-reg.h => bridge/cdns-mhdp-common.h} (80%)
create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp.c
delete mode 100644 drivers/gpu/drm/rockchip/cdn-dp-reg.c
--
2.17.1
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