[PATCH v6.1 0/4] drm: bridge: dw-hdmi: Add support for Custom PHYs

[Neil Armstrong]

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 v6 at [8] :
 - Dropped already merged media patches in topic/synopsys-media-formats-2017-04-03 tag
 - Reword the patch "Switch to V4L bus format and encodings" commit message
 - Fix typo in patch "Switch to V4L bus format and encodings"
 - Add Laurent Pinchart reviewed/acked-by's
 - Rebased on drm-misc-next at 9c4ad466d1dd

Changes since v5.1 at [7] :
 - Rework of the 48bit tables in V4L bus formats documentation
 - Add Archit reviewed-by's

Changes since v5 at [6] :
 - Small addition in V4L YUV bus formats documentation

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@baylibre.com
[2] http://lkml.kernel.org/r/1485774318-21916-1-git-send-email-narmstrong@baylibre.com
[3] http://lkml.kernel.org/r/1488468572-31971-1-git-send-email-narmstrong@baylibre.com
[4] http://lkml.kernel.org/r/1488904944-14285-1-git-send-email-narmstrong@baylibre.com
[5] http://lkml.kernel.org/r/1490109161-20529-1-git-send-email-narmstrong@baylibre.com
[6] http://lkml.kernel.org/r/1490864675-17336-1-git-send-email-narmstrong@baylibre.com
[7] http://lkml.kernel.org/r/1490970319-24981-1-git-send-email-narmstrong@baylibre.com
[8] http://lkml.kernel.org/r/1491230558-10804-1-git-send-email-narmstrong@baylibre.com

Laurent Pinchart (1):
  drm: bridge: dw-hdmi: Extract PHY interrupt setup to a function

Neil Armstrong (3):
  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 +
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 470 ++++++++++++++++++++----------
 include/drm/bridge/dw_hdmi.h              |  68 +++++
 4 files changed, 398 insertions(+), 156 deletions(-)
 create mode 100644 Documentation/gpu/bridge/dw-hdmi.rst

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1.9.1