[PATCH v2 0/2] Add RZ/G2L DSI driver

[Biju Das]

This patch series aims to support the MIPI DSI encoder found in the RZ/G2L
SoC. It currently supports DSI mode only.

This unit supports MIPI Alliance Specification for Display Serial Interface (DSI) Specification. This unit provides a
solution for transmitting MIPI DSI compliant digital video and packets. Normative References are below.
* MIPI Alliance Specification for Display Serial Interface Version 1.3.1
* MIPI Alliance Specification for D-PHY Version 2.1

The following are key features of this unit.

* 1 channel
* The number of Lane: 4-lane
* Support up to Full HD (1920 × 1080), 60 fps (RGB888)
* Maximum Bandwidth: 1.5 Gbps per lane
* Support Output Data Format: RGB666 / RGB888

v1->v2:
 * Added full path for dsi-controller.yaml
 * Modeled DSI + D-PHY as single block and updated reg property
 * Fixed typo D_PHY->D-PHY
 * Updated description
 * Added interrupts and interrupt-names and updated the example 
 * Driver rework based on dt-binding changes (DSI + D-PHY) as single block
 * Replaced link_mmio and phy_mmio with mmio in struct rzg2l_mipi_dsi
 * Replaced rzg2l_mipi_phy_write with rzg2l_mipi_dsi_phy_write
   and rzg2l_mipi_dsi_link_write
 * Replaced rzg2l_mipi_phy_read->rzg2l_mipi_dsi_link_read
RFC->v1:
 * Added a ref to dsi-controller.yaml.
 * Added "depends on ARCH_RENESAS || COMPILE_TEST" on KCONFIG
   and dropped DRM as it is implied by DRM_BRIDGE
 * Used devm_reset_control_get_exclusive() for reset handle
 * Removed bool hsclkmode from struct rzg2l_mipi_dsi
 * Added error check for pm, using pm_runtime_resume_and_get() instead of
   pm_runtime_get_sync()
 * Added check for unsupported formats in rzg2l_mipi_dsi_host_attach()
 * Avoided read-modify-write stopping hsclock
 * Used devm_platform_ioremap_resource for resource allocation
 * Removed unnecessary assert call from probe and remove.
 * wrap the line after the PTR_ERR() in probe()
 * Updated reset failure messages in probe
 * Fixed the typo arstc->prstc
 * Made hex constants to lower case.
RFC:
 * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-22-biju.das.jz@bp.renesas.com/
 * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-23-biju.das.jz@bp.renesas.com/

Biju Das (2):
  dt-bindings: display: bridge: Document RZ/G2L MIPI DSI TX bindings
  drm: rcar-du: Add RZ/G2L DSI driver

 .../bindings/display/bridge/renesas,dsi.yaml  | 175 +++++
 drivers/gpu/drm/rcar-du/Kconfig               |   8 +
 drivers/gpu/drm/rcar-du/Makefile              |   1 +
 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c      | 686 ++++++++++++++++++
 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h | 149 ++++
 5 files changed, 1019 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
 create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
 create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h

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2.17.1