[v13,00/18] drm: Add Samsung MIPI DSIM bridge

This series supports common bridge support for Samsung MIPI DSIM
which is used in Exynos and i.MX8MM SoC's.

The final bridge supports both the Exynos and i.MX8M Mini/Nano/Plus.

Patch 0001 - 0004: find child DSI bridge and panel

Patch 0005 - 0006: optional PHY, PMS_P offset

Patch 0007       : introduce hw_type

Patch 0008	 : fixing host init

Patch 0009	 : atomic_check

Patch 0010	 : input_bus_flags

Patch 0011	 : atomic_get_input_bus_fmts

Patch 0012 - 0013: component vs bridge

Patch 0014	 : DSIM bridge

Patch 0015 - 0016: i.MX8M Mini/Nano

Patch 0017 - 0018: i.MX8M Plus

Changes for v13:
- remove devm call for DSI panel or bridge finding
- rebased on drm-misc-next

Changes for v12:
- collect RB from Marek V
- add te_irq_handler hook
- fix comments from Marek V
- update atomic_get_input_bus_fmts logic

Changes for v11:
- collect RB from Frieder Schrempf
- collect ACK from Rob
- collect ACK from Robert
- fix BIT macro replacements
- fix checkpatch --strict warnings
- fix unneeded commit text
- drop extra lines

Changes for v10:
- rebase on drm-misc-next
- add drm_of_dsi_find_panel_or_bridge
- add devm_drm_of_dsi_get_bridge
- fix host initialization (Thanks to Marek Szyprowski)
- rearrange the tiny patches for easy to review
- update simple names for enum hw_type
- add is_hw_exynos macro
- rework on commit messages

Changes for v9:
- rebase on drm-misc-next
- drop drm bridge attach fix for Exynos
- added prepare_prev_first flag
- added pre_enable_prev_first flag
- fix bridge chain order for exynos
- added fix for Exynos host init for first DSI transfer
- added MEDIA_BUS_FMT_FIXED
- return MEDIA_BUS_FMT_RGB888_1X24 output_fmt if supported output_fmt
  list is unsupported.
- added MEDIA_BUS_FMT_YUYV10_1X20
- added MEDIA_BUS_FMT_YUYV12_1X24

Changes for v8:
* fixed comment lines
* fixed commit messages
* fixed video mode bits
* collect Marek Ack
* fixed video mode bit names
* update input formats logic
* added imx8mplus support

Changes for v7:
* fix the drm bridge attach chain for exynos drm dsi driver
* fix the hw_type checking logic

Changes for v6:
* handle previous bridge for exynos dsi while attaching bridge 

Changes for v5:
* bridge changes to support multi-arch
* updated and clear commit messages
* add hw_type via plat data
* removed unneeded quirk
* rebased on linux-next

Changes for v4:
* include Inki Dae in MAINTAINERS
* remove dsi_driver probe in exynos_drm_drv to support multi-arch build
* update init handling to ensure host init done on first cmd transfer

Changes for v3:
* fix the mult-arch build
* fix dsi host init
* updated commit messages

Changes for v2:
* fix bridge handling
* fix dsi host init
* correct the commit messages

Tested in Engicam i.Core MX8M Mini SoM.

Repo:
https://github.com/openedev/kernel/tree/imx8mm-dsi-v13

v11:
https://lore.kernel.org/all/20230126144427.607098-1-jagan@amarulasolutions.com/

Any inputs?
Jagan.

Jagan Teki (16):
  drm: of: Lookup if child node has DSI panel or bridge
  drm: bridge: panel: Support nodrm case for drmm_panel_bridge_add
  drm: exynos: dsi: Drop explicit call to bridge detach
  drm: exynos: dsi: Switch to DSI panel or bridge find helper
  drm: exynos: dsi: Mark PHY as optional
  drm: exynos: dsi: Add platform PLL_P (PMS_P) offset
  drm: exynos: dsi: Introduce hw_type platform data
  drm: exynos: dsi: Add atomic check
  drm: exynos: dsi: Add input_bus_flags
  drm: exynos: dsi: Add atomic_get_input_bus_fmts
  drm: exynos: dsi: Consolidate component and bridge
  drm: exynos: dsi: Add host helper for te_irq_handler
  drm: bridge: Generalize Exynos-DSI driver into a Samsung DSIM bridge
  dt-bindings: display: exynos: dsim: Add NXP i.MX8M Mini/Nano support
  drm: bridge: samsung-dsim: Add i.MX8M Mini/Nano support
  dt-bindings: display: exynos: dsim: Add NXP i.MX8M Plus support

Marek Szyprowski (1):
  drm: exynos: dsi: Handle proper host initialization

Marek Vasut (1):
  drm: bridge: samsung-dsim: Add i.MX8M Plus support

 .../bindings/display/exynos/exynos_dsim.txt   |    2 +
 MAINTAINERS                                   |    9 +
 drivers/gpu/drm/bridge/Kconfig                |   12 +
 drivers/gpu/drm/bridge/Makefile               |    1 +
 drivers/gpu/drm/bridge/panel.c                |    7 +
 drivers/gpu/drm/bridge/samsung-dsim.c         | 1933 +++++++++++++++++
 drivers/gpu/drm/drm_of.c                      |  112 +-
 drivers/gpu/drm/exynos/Kconfig                |    1 +
 drivers/gpu/drm/exynos/exynos_drm_dsi.c       | 1819 +---------------
 include/drm/bridge/samsung-dsim.h             |  115 +
 include/drm/drm_of.h                          |   12 +
 11 files changed, 2271 insertions(+), 1752 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/samsung-dsim.c
 create mode 100644 include/drm/bridge/samsung-dsim.h

On 2/27/23 12:39, Jagan Teki wrote:
> Finding the right input bus format throughout the pipeline is hard
> so add atomic_get_input_bus_fmts callback and initialize with the
> proper input format from list of supported output formats.
> 
> This format can be used in pipeline for negotiating bus format between
> the DSI-end of this bridge and the other component closer to pipeline
> components.
> 
> List of Pixel formats are taken from,
> AN13573 i.MX 8/RT MIPI DSI/CSI-2, Rev. 0, 21 March 2022
> 3.7.4 Pixel formats
> Table 14. DSI pixel packing formats
> 
> Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

Reviewed-by: Marek Vasut <marex@denx.de>