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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): - 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. Changes in v3: - Corrected dt-bindings document - Enabled some clocks at startup (since FW doesn't do that anymore). - Changed Firmware file name to match the file on Linux Firmware repo. - Added SST audio support - Made common functions (in cdns-mhdp-common.*) public. Changes in v4: - Fixed Kconfig in drm/rockchip - Fixed Signed-offs - dp_link_status() is no longer public since it's used only in drm_dp_helper.c - Replaced EXTRA_CFLAGS with ccflags-y in drm/rockchip Makefile Changes in v5: - Fixed Kconfig in drm/rockchip again - Moved cdn-dp-reg.h (cdns-mhdp-common.h) to include/drm/bridge instead of drivers/gpu/drm/bridge/ - Updated the mhdp_validate_cr function Changes in v6: - Added Reviewed-bys for already reviewed patches - Dropped patch v5-0003 (that made dp_get_lane_status helper public) - Added patch with MST support - Added patch with Cadence SD0801 PHY init Damian Kos (2): drm/rockchip: prepare common code for cdns and rk dpi/dp driver drm/bridge: add PHY initialization in mhdp8546 driver. Piotr Sroka (1): drm/bridge: add support for MST in mhdp8546 driver Quentin Schulz (3): drm/dp: fix link probing for devices supporting DP 1.4+ dt-bindings: drm/bridge: Document Cadence MHDP bridge bindings drm: bridge: add support for Cadence MHDP DPI/DP bridge .../bindings/display/bridge/cdns,mhdp.txt | 43 + drivers/gpu/drm/bridge/Kconfig | 9 + drivers/gpu/drm/bridge/Makefile | 3 + drivers/gpu/drm/bridge/cdns-mhdp-common.c | 1107 +++++++++++++ drivers/gpu/drm/bridge/cdns-mhdp-mst.c | 594 +++++++ drivers/gpu/drm/bridge/cdns-mhdp.c | 1371 +++++++++++++++++ drivers/gpu/drm/bridge/cdns-mhdp.h | 209 +++ drivers/gpu/drm/drm_dp_helper.c | 30 +- drivers/gpu/drm/rockchip/Kconfig | 4 +- drivers/gpu/drm/rockchip/Makefile | 2 +- drivers/gpu/drm/rockchip/cdn-dp-core.c | 234 +-- drivers/gpu/drm/rockchip/cdn-dp-core.h | 43 +- drivers/gpu/drm/rockchip/cdn-dp-reg.c | 969 ------------ include/drm/bridge/cdns-mhdp-cbs.h | 27 + .../drm/bridge/cdns-mhdp-common.h | 174 ++- 15 files changed, 3669 insertions(+), 1150 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.txt create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp-common.c create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp-mst.c create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp.c create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp.h delete mode 100644 drivers/gpu/drm/rockchip/cdn-dp-reg.c create mode 100644 include/drm/bridge/cdns-mhdp-cbs.h rename drivers/gpu/drm/rockchip/cdn-dp-reg.h => include/drm/bridge/cdns-mhdp-common.h (77%)