The Amlogic GX SoCs implements a Synopsys DesignWare HDMI TX Controller in combination with a very custom PHY.
Thanks to Laurent Pinchart's changes, the HW report the following : Detected HDMI TX controller v2.01a with HDCP (meson_dw_hdmi_phy)
The following differs from common PHY integration as managed in the current driver : - Amlogic PHY is not configured through the internal I2C link - Amlogic PHY do not use the ENTMDS, SVSRET, PDDQ, ... signals from the controller - Amlogic PHY do not export HPD ands RxSense signals to the controller
And finally, concerning the controller integration : - the Controller registers are not flat memory-mapped, and uses an addr+read/write register pair to write all registers. - Inputs only YUV444 pixel data
Most of these uses case are implemented in Laurent Pinchart v5.1 patchset merged in drm-misc-next branch.
This is why the following patchset implements : - Configure the Input format from the plat_data - Add PHY callback to handle HPD and RxSense out of the dw-hdmi driver
To implement the input format handling, the Synopsys HDMIT TX Controller input V4L bus formats are used and missing formats + documentation are added.
This patchset makes the Amlogic GX SoCs HDMI output successfully work, and is also tested on the RK3288 ACT8846 EVB Board.
Changes since v4 at [5] : - Rebased on drm-misc-next at bd283d2f66c2 - Fix 4:2:0 bus formats naming - Renamed function fd_registered to i2c_init in dw-hdmi.c
Changes since v3 at [4] : - Fix 4:2:0 bus formats naming - Add separate 36bit and 48bit tables for bus formats documentation - Added 4:2:0 bus config in hdmi_video_sample - Moved dw_hdmi documentation in a "bridge" subdir - Rebase on drm-misc-next at 62c58af32c93
Changes since v2 at [3] : - Rebase on laurent patch "Extract PHY interrupt setup to a function" - Reduce phy operations - Switch the V4L bus formats and encodings instead of custom enum
Changes since v1 at [2] : - Drop patches submitted by laurent
Changes since RFC at [1] : - Regmap fixup for 4bytes register access, tested on RK3288 SoC - Move phy callbacks to phy_ops and move Synopsys PHY calls into default ops - Move HDMI link data into shared header - Move Pixel Encoding enum to shared header
[1] http://lkml.kernel.org/r/1484656294-6140-1-git-send-email-narmstrong@baylibr... [2] http://lkml.kernel.org/r/1485774318-21916-1-git-send-email-narmstrong@baylib... [3] http://lkml.kernel.org/r/1488468572-31971-1-git-send-email-narmstrong@baylib... [4] http://lkml.kernel.org/r/1488904944-14285-1-git-send-email-narmstrong@baylib... [5] http://lkml.kernel.org/r/1490109161-20529-1-git-send-email-narmstrong@baylib...
Laurent Pinchart (1): drm: bridge: dw-hdmi: Extract PHY interrupt setup to a function
Neil Armstrong (5): media: uapi: Add RGB and YUV bus formats for Synopsys HDMI TX Controller documentation: media: Add documentation for new RGB and YUV bus formats drm: bridge: dw-hdmi: Switch to V4L bus format and encodings drm: bridge: dw-hdmi: Add Documentation on supported input formats drm: bridge: dw-hdmi: Move HPD handling to PHY operations
Documentation/gpu/bridge/dw-hdmi.rst | 15 + Documentation/gpu/index.rst | 1 + Documentation/media/uapi/v4l/subdev-formats.rst | 871 +++++++++++++++++++++++- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 470 ++++++++----- include/drm/bridge/dw_hdmi.h | 68 ++ include/uapi/linux/media-bus-format.h | 13 +- 6 files changed, 1266 insertions(+), 172 deletions(-) create mode 100644 Documentation/gpu/bridge/dw-hdmi.rst