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 (Vendor 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 at [3] :
- Conversion to regmap for register access
- Add more callbacks ops to handle Custom PHYs
- Fixes a bug that considers the input to be always RBG and sends bad pixel
format to a DVI sink by disabling CSC
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 v2 at [4] :
- 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@xxxxxxxxxxxx
[2] http://lkml.kernel.org/r/1485774318-21916-1-git-send-email-narmstrong@xxxxxxxxxxxx
[3] http://lkml.kernel.org/r/20170303172007.26541-1-laurent.pinchart+renesas@xxxxxxxxxxxxxxxx
[4] http://lkml.kernel.org/r/1488468572-31971-1-git-send-email-narmstrong@xxxxxxxxxxxx
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/dw-hdmi.rst | 15 +
Documentation/gpu/index.rst | 1 +
Documentation/media/uapi/v4l/subdev-formats.rst | 4992 ++++++++++++++++++-----
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 465 ++-
include/drm/bridge/dw_hdmi.h | 68 +
include/uapi/linux/media-bus-format.h | 13 +-
6 files changed, 4368 insertions(+), 1186 deletions(-)
create mode 100644 Documentation/gpu/dw-hdmi.rst
--
1.9.1
