[PATCH v5 00/11] drm/bridge: dw-hdmi: implement bus-format negotiation and YUV420 support

[Neil Armstrong]

Hi Philippe, Heiko, Maxime, Laurent,

A bad negociation was detected on platforms not implementing a bridge on the
encoder side, which has been fixed in this version.

Could you check it doesn't break your platforms using dw-hdmi ? Especially
patches 1-5.

Thanks,
Neil

This patchset is based on Boris's merged "drm: Add support for bus-format negotiation"
patchset to implement full bus-format negotiation for DW-HDMI, including YUV420 support and
10/12/16bit YUV444, YUV422 and RGB. The Color Space Converter support is already implemented.

And the counterpart implementation in the Amlogic Meson VPU dw-hdmi glue :
- basic bus-format negotiation to select YUV444 bus-format as DW-HDMI input
- YUV420 support when HDMI2.0 YUV420 modeset

This is a follow-up from the previous attempts :
- "drm/meson: Add support for HDMI2.0 YUV420 4k60" at [2]
- "drm/meson: Add support for HDMI2.0 4k60" at [3]

Changes since v4 at [7]:
- Cleaned up patch 1
- Added comment on patch 2
- Added commit message on patch 3
- Fixed invalid negociation when encoder is not yet a bridge (seen on allwinner & rockchip platforms) on patch 4
- Fixed invalid defines, handled MEDIA_BUS_FMT_FIXED and cleaned negociation debug on patch 4
- Added tags on patch 5, 6
- Removed meson_venc_hdmi_encoder_get_out_bus_fmts on patch 7
- Add off-list r-b from Jernej

Changes since v3 at [6]:
- Added "Plug atomic state hooks to the default implementation" on drm/bridge: dw-hdmi
- Also added these atomic state hooks in meson-dw-hdmi in patch 7
- Rebased on latest drm-misc-next including patches 1-7 of [1]

Changes since RFC v2 at [5]:
- Added fixes from Jonas, who tested and integrated it for Rockchip SoCs
- Added support for 10/12/16bit tmds clock calculation
- Added support for max_bcp connector property
- Adapted to Boris's v4 patchset
- Fixed typos reported by boris

Changes since RFC v1 at [4]:
- Rewrote negociation using the v2 patchset, including full DW-HDMI fmt negociation

[2] https://patchwork.freedesktop.org/patch/msgid/20190520133753.23871-1-narmstrong@baylibre.com
[3] https://patchwork.freedesktop.org/patch/msgid/1549022873-40549-1-git-send-email-narmstrong@baylibre.com
[4] https://patchwork.freedesktop.org/patch/msgid/20190820084109.24616-1-narmstrong@baylibre.com
[5] https://patchwork.freedesktop.org/patch/msgid/20190827081425.15011-1-narmstrong@baylibre.com
[6] https://patchwork.freedesktop.org/patch/msgid/20191218154637.17509-1-narmstrong@baylibre.com
[7] https://patchwork.freedesktop.org/patch/msgid/20200206191834.6125-1-narmstrong@baylibre.com

Jonas Karlman (2):
  drm/bridge: dw-hdmi: set mtmdsclock for deep color
  drm/bridge: dw-hdmi: add max bpc connector property

Neil Armstrong (9):
  drm/bridge: dw-hdmi: Plug atomic state hooks to the default
    implementation
  drm/bridge: synopsys: dw-hdmi: add bus format negociation
  drm/bridge: synopsys: dw-hdmi: allow ycbcr420 modes for >= 0x200a
  drm/meson: venc: make drm_display_mode const
  drm/meson: meson_dw_hdmi: add bridge and switch to drm_bridge_funcs
  drm/meson: dw-hdmi: stop enforcing input_bus_format
  drm/meson: venc: add support for YUV420 setup
  drm/meson: vclk: add support for YUV420 setup
  drm/meson: Add YUV420 output support

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 319 +++++++++++++++++++++-
 drivers/gpu/drm/meson/meson_dw_hdmi.c     | 180 +++++++++---
 drivers/gpu/drm/meson/meson_vclk.c        |  93 +++++--
 drivers/gpu/drm/meson/meson_vclk.h        |   7 +-
 drivers/gpu/drm/meson/meson_venc.c        |  10 +-
 drivers/gpu/drm/meson/meson_venc.h        |   4 +-
 drivers/gpu/drm/meson/meson_venc_cvbs.c   |   6 +-
 include/drm/bridge/dw_hdmi.h              |   1 +
 8 files changed, 544 insertions(+), 76 deletions(-)

-- 
2.22.0