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 v4 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 RxSens out of the dw-hdmi drive
This patchset makes the Amlogix GX SoCs HDMI output successfully work, and is
also tested on the RK3288 ACT8846 EVB Board.
Changes since v1 at [2] :
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/20170301223915.29888-1-laurent.pinchart+renesas@xxxxxxxxxxxxxxxx
Neil Armstrong (2):
drm: bridge: dw-hdmi: Take input format from plat_data
drm: bridge: Move HPD handling to PHY operations
drivers/gpu/drm/bridge/dw-hdmi.c | 193 +++++++++++++++++++++++++--------------
include/drm/bridge/dw_hdmi.h | 17 ++++
2 files changed, 143 insertions(+), 67 deletions(-)
--
1.9.1
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