[PATCH v3 00/12] drm/imx/ipuv3: switch LDB and parallel-display driver to use drm_bridge_connector

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

The IPUv3 DRM i.MX driver contains several codepaths for different
usescases: both LDB and paralllel-display drivers handle next-bridge,
panel and the legacy display-timings DT node on their own.

Drop unused ddc-i2c-bus and edid handling (none of the DT files merged
upstream ever used these features), switch to panel-bridge driver,
removing the need to handle drm_panel codepaths separately and finally
switch to drm_bridge_connector, removing requirement for the downstream
bridges to create drm_connector on their own.

This has been tested on the iMX53 with the DPI panel attached to LDB via
LVDS decoder, using all possible usecases (lvds-codec + panel, panel
linked directly to LDB node and the display-timings node).

To be able to test on the iMX53 QSRB with the HDMI cape apply [1], [2]

[1] https://lore.kernel.org/all/20240514030718.533169-1-victor.liu@nxp.com/
[2] https://lore.kernel.org/all/20240602-imx-sii902x-defconfig-v1-1-71a6c382b422@linaro.org/

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
Changes in v3:
- Notice (soft) dependencies in the cover letter (Chris)
- Select DRM_BRIDGE instead of depending on it (Philipp)
- Dropped unused selection of DRM_PANEL (Philipp)
- Added missing include of <drm/bridge/imx.h> to parallel-display.c
  (Philipp)
- Link to v2: https://lore.kernel.org/r/20240331-drm-imx-cleanup-v2-0-d81c1d1c1026@linaro.org

Changes in v2:
- Fixed drm_bridge_attach flags in imx/parallel-display driver.
- Moved the legacy bridge to drivers/gpu/drm/bridge
- Added missing EXPORT_SYMBOL_GPL to the iMX legacy bridge
- Link to v1: https://lore.kernel.org/r/20240311-drm-imx-cleanup-v1-0-e104f05caa51@linaro.org

---
Dmitry Baryshkov (12):
      dt-bindings: display: fsl-imx-drm: drop edid property support
      dt-bindings: display: imx/ldb: drop ddc-i2c-bus property
      drm/imx: cleanup the imx-drm header
      drm/imx: parallel-display: drop edid override support
      drm/imx: ldb: drop custom EDID support
      drm/imx: ldb: drop custom DDC bus support
      drm/imx: ldb: switch to drm_panel_bridge
      drm/imx: parallel-display: switch to drm_panel_bridge
      drm/imx: add internal bridge handling display-timings DT node
      drm/imx: ldb: switch to imx_legacy_bridge / drm_bridge_connector
      drm/imx: parallel-display: switch to imx_legacy_bridge / drm_bridge_connector
      drm/imx: move imx_drm_connector_destroy to imx-tve

 .../bindings/display/imx/fsl-imx-drm.txt           |   2 -
 .../devicetree/bindings/display/imx/ldb.txt        |   1 -
 drivers/gpu/drm/bridge/imx/Kconfig                 |  10 +
 drivers/gpu/drm/bridge/imx/Makefile                |   1 +
 drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c     |  85 +++++++++
 drivers/gpu/drm/imx/ipuv3/Kconfig                  |  10 +-
 drivers/gpu/drm/imx/ipuv3/imx-drm-core.c           |   7 -
 drivers/gpu/drm/imx/ipuv3/imx-drm.h                |  14 --
 drivers/gpu/drm/imx/ipuv3/imx-ldb.c                | 203 +++++----------------
 drivers/gpu/drm/imx/ipuv3/imx-tve.c                |   8 +-
 drivers/gpu/drm/imx/ipuv3/parallel-display.c       | 139 +++-----------
 include/drm/bridge/imx.h                           |  13 ++
 12 files changed, 187 insertions(+), 306 deletions(-)
---
base-commit: 850ca533e572247b6f71dafcbf7feb0359350963
change-id: 20240310-drm-imx-cleanup-10746a9b71f5

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>