[PATCH v5 00/17] drm/meson: add support for MIPI DSI Display

[Neil Armstrong]

The Amlogic G12A, G12B & SM1 SoCs embeds a Synopsys DW-MIPI-DSI transceiver (ver 1.21a),
with a custom glue managing the IP resets, clock and data input similar to the DW-HDMI
glue on the same Amlogic SoCs.

This adds support for the glue managing the transceiver, mimicing the init flow provided
by Amlogic to setup the ENCL encoder, the glue, the transceiver, the digital D-PHY and the
Analog PHY in the proper way.

The DW-MIPI-DSI transceiver + D-PHY are clocked by the GP0 PLL, and the ENCL encoder + VIU
pixel reader by the VCLK2 clock using the HDMI PLL.

The DW-MIPI-DSI transceiver gets this pixel stream as input clocked with the VCLK2 clock.

An optional "MEAS" clock can be enabled to measure the delay between each vsync feeding the
DW-MIPI-DSI transceiver.

This patchset is based on an earlier attempt at [1] for the AXG SoCs, but:
- previous glue code was a single monolitic code mixing encoders & bridges, this version
  is aligned on the previous cleanup done on HDMI & CVBS bridges architecture at [2]
- since the only output of AXG is DSI, AXG VPU support is post-poned until we implement
  single-clock DSI support specific case on top of this.

This is a re-spin of v3 at [5], the main change is about clock control, the clock
setup has been redesigned to use CCF, a common PLL (GP0) and the VCLK2 clock
path for DSI in preparation of full CCF support and possibly dual display with HDMI.

I kept review tags when the content was only slighly changed.

Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
---
Changes in v5:
- Aded PRIV all the G12 internal clk IDS to simplify public exposing
- Fixed the DSI bindings
- Fixed the DSI HSYNC/VSYNC polarity handling
- Fixed the DSI clock setup
- Fixed the DSI phy timings
- Dropped components for DSI, only keeping it for HDMI
- Added MNT Reform 2 CM4 DT
- Dropped already applied PHY fix
- Link to v4: https://lore.kernel.org/r/20230512-amlogic-v6-4-upstream-dsi-ccf-vim3-v4-0-2592c29ea263@xxxxxxxxxx

Changes from v3 at [5]:
- switched all clk setup via CCF
- using single PLL for DSI controller & ENCL encoder
- added ENCL clocks to CCF
- make the VCLK2 clocks configuration by CCF
- fixed probe/bind of DSI controller to work with panels & bridges
- added bit_clk to controller to it can setup the BIT clock aswell
- added fix for components unbind
- added fix for analog phy setup value
- added TS050 timings fix
- dropped previous clk control patch

Changes from v2 at [4]:
- Fixed patch 3
- Added reviews from Jagan
- Rebased on v5.19-rc1

Changes from v1 at [3]:
- fixed DSI host bindings
- add reviewed-by tags for bindings
- moved magic values to defines thanks to Martin's searches
- added proper prefixes to defines
- moved phy_configure to phy_init() dw-mipi-dsi callback
- moved phy_on to a new phy_power_on() dw-mipi-dsi callback
- correctly return phy_init/configure errors to callback returns

[1] https://lore.kernel.org/r/20200907081825.1654-1-narmstrong@xxxxxxxxxxxx
[2] https://lore.kernel.org/r/20211020123947.2585572-1-narmstrong@xxxxxxxxxxxx
[3] https://lore.kernel.org/r/20200907081825.1654-1-narmstrong@xxxxxxxxxxxx
[4] https://lore.kernel.org/r/20220120083357.1541262-1-narmstrong@xxxxxxxxxxxx
[5] https://lore.kernel.org/r/20220617072723.1742668-1-narmstrong@xxxxxxxxxxxx

---
Neil Armstrong (17):
      clk: meson: g12a: prefix private CLK IDs defines with PRIV
      clk: meson: g12a: add CTS_ENCL & CTS_ENCL_SEL clocks
      dt-bindings: clk: g12a-clkc: add VCLK2_SEL and CTS_ENCL clock ids
      clk: meson: g12: use VCLK2_SEL, CTS_ENCL & CTS_ENCL_SEL public CLK IDs
      clk: meson: g12a: make VCLK2 and ENCL clock path configurable by CCF
      dt-bindings: display: add Amlogic MIPI DSI Host Controller bindings
      dt-bindings: display: meson-vpu: add third DPI output port
      drm/meson: fix unbind path if HDMI fails to bind
      drm/meson: only use components with dw-hdmi
      drm/meson: venc: add ENCL encoder setup for MIPI-DSI output
      drm/meson: add DSI encoder
      drm/meson: add support for MIPI-DSI transceiver
      drm/panel: khadas-ts050: update timings to achieve 60Hz refresh rate
      arm64: meson: g12-common: add the MIPI DSI nodes
      DONOTMERGE: arm64: meson: khadas-vim3l: add DSI panel
      dt-bindings: arm: amlogic: Document the MNT Reform 2 CM4 adapter with a BPI-CM4 Module
      arm64: dts: amlogic: meson-g12b-bananapi-cm4: add support for MNT Reform2 with CM4 adaper

 Documentation/devicetree/bindings/arm/amlogic.yaml |   1 +
 .../display/amlogic,meson-g12a-dw-mipi-dsi.yaml    | 118 +++
 .../bindings/display/amlogic,meson-vpu.yaml        |   5 +
 arch/arm64/boot/dts/amlogic/Makefile               |   1 +
 arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi  |  70 ++
 .../meson-g12b-bananapi-cm4-mnt-reform2.dts        | 388 ++++++++++
 .../boot/dts/amlogic/meson-g12b-khadas-vim3.dtsi   |   2 +-
 arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi |  76 ++
 .../boot/dts/amlogic/meson-sm1-khadas-vim3l.dts    |   2 +-
 drivers/clk/meson/g12a.c                           | 791 ++++++++++++---------
 drivers/clk/meson/g12a.h                           | 261 ++++---
 drivers/gpu/drm/meson/Kconfig                      |   7 +
 drivers/gpu/drm/meson/Makefile                     |   3 +-
 drivers/gpu/drm/meson/meson_drv.c                  |  62 +-
 drivers/gpu/drm/meson/meson_drv.h                  |   1 +
 drivers/gpu/drm/meson/meson_dw_mipi_dsi.c          | 352 +++++++++
 drivers/gpu/drm/meson/meson_dw_mipi_dsi.h          | 160 +++++
 drivers/gpu/drm/meson/meson_encoder_dsi.c          | 174 +++++
 drivers/gpu/drm/meson/meson_encoder_dsi.h          |  13 +
 drivers/gpu/drm/meson/meson_registers.h            |  25 +
 drivers/gpu/drm/meson/meson_venc.c                 | 211 +++++-
 drivers/gpu/drm/meson/meson_venc.h                 |   6 +
 drivers/gpu/drm/meson/meson_vpp.h                  |   2 +
 drivers/gpu/drm/panel/panel-khadas-ts050.c         |  16 +-
 include/dt-bindings/clock/g12a-clkc.h              |   3 +
 25 files changed, 2262 insertions(+), 488 deletions(-)
---
base-commit: 8c33787278ca8db73ad7d23f932c8c39b9f6e543
change-id: 20230512-amlogic-v6-4-upstream-dsi-ccf-vim3-b8e5217e1f4a

Best regards,
-- 
Neil Armstrong <neil.armstrong@xxxxxxxxxx>