[PATCH v6 0/9] 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 is a follow-up of v5  now the DRM patches are applied, the clk & DT changes
remains for a full DSI support on G12A & SM1 platforms.

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.

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.

The change from v5 is that now we use a "VCLK" driver instea dof notifier and rely
on CLK_SET_RATE_GATE to ensure the VCLK gate operation are called.

Depends on clkid public migration at [4].

Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
---
Changes in v6:
- dropped applied DRM patches
- dropped clk private prefix patches
- rebased on top of 20230607-topic-amlogic-upstream-clkid-public-migration-v2-0-38172d17c27a at linaro.org
- re-ordered/cleaned ENCL patches to match clkid public migration
- Added new "vclk" driver
- uses vclk driver instead of notifier
- cleaned VCLK2 clk flags
- add px_clk gating from DSI driver
- Link to v5: https://lore.kernel.org/r/20230512-amlogic-v6-4-upstream-dsi-ccf-vim3-v5-0-56eb7a4d5b8e@linaro.org

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@linaro.org

Changes from v3 at [3]:
- 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 [2]:
- Fixed patch 3
- Added reviews from Jagan
- Rebased on v5.19-rc1

Changes from v1 at [1]:
- 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@baylibre.com
[2] https://lore.kernel.org/r/20220120083357.1541262-1-narmstrong@baylibre.com
[3] https://lore.kernel.org/r/20220617072723.1742668-1-narmstrong@baylibre.com
[4] https://lore.kernel.org/all/20230607-topic-amlogic-upstream-clkid-public-migration-v2-0-38172d17c27a@linaro.org/

---
Neil Armstrong (9):
      dt-bindings: clk: g12a-clkc: add CTS_ENCL clock ids
      clk: meson: g12a: add CTS_ENCL & CTS_ENCL_SEL clocks
      clk: meson: add vclk driver
      clk: meson: g12a: make VCLK2 and ENCL clock path configurable by CCF
      drm/meson: gate px_clk when setting 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 +
 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/Kconfig                          |   5 +
 drivers/clk/meson/Makefile                         |   1 +
 drivers/clk/meson/g12a.c                           |  81 ++++-
 drivers/clk/meson/vclk.c                           | 146 ++++++++
 drivers/clk/meson/vclk.h                           |  68 ++++
 drivers/gpu/drm/meson/meson_dw_mipi_dsi.c          |   7 +
 include/dt-bindings/clock/g12a-clkc.h              |   2 +
 14 files changed, 832 insertions(+), 18 deletions(-)
---
base-commit: c6eb67de8578186066a9a3e947edf95e6fc56ed7
change-id: 20230512-amlogic-v6-4-upstream-dsi-ccf-vim3-b8e5217e1f4a

Best regards,
-- 
Neil Armstrong <neil.armstrong at linaro.org>