Hi,

This patch-set adds support for the i.MX94 Display Control Interface.
It depends on Peng Fan's DTS patch [1] that was not yet merged.

Also, included in the patch-set are a few extra patches that the DCIF
driver depends on for functioning properly:
 * 1/9 - 3/9 : add support for i.MX94 to fsl-ldb driver. It also
               contains a patch (2/9) from Liu Ying that was already reviewed
               and was part of another patch-set ([2]), but was never merged;

Thanks,
Laurentiu

[1] https://lkml.org/lkml/2025/7/7/84
[2] https://lkml.org/lkml/2024/11/14/262

---
Changes in v7:
- Rebased to latest linux-next;
- Addressed some new checkpatch warnings: kzalloc -> kzalloc_obj;
- Fixed a couple of static check warnings in probe();
- Added Luca's r-b tag for bridge refcounting;
- Link to v6: https://lore.kernel.org/r/20251103-dcif-upstreaming-v6-0-76fcecfda919@oss.nxp.com

Changes in v6:
- 2/9: Collected r-b tag from Francesco;
- 3/9: Removed ch_max_clk_khz variable as suggested by Luca and added
  his r-b tag;
- 4/9: Collected r-b tag;
- 5/9: Call drm_bridge_put() automatically in
  dcif_crtc_query_output_bus_format() by using a cleanup action (Luca);
- 6/9: Moved allOf: block after required: block (Krzysztof). Collected
  r-b tag;
- Link to v5: https://lore.kernel.org/r/20250911-dcif-upstreaming-v5-0-a1e8dab8ae40@oss.nxp.com

Changes in v5:
- 4/9: Removed "bindings for" from the title, changed the port
  definition and simplified the example;
- 6/9: Fixed the way 'ldb' child node is declared: declare the
  'ldb' child node out of if:then: block and set the property
  to false for compatibles other than nxp,imx94-lvds-csr;
- Link to v4: https://lore.kernel.org/r/20250903123332.2569241-1-laurentiu.palcu@oss.nxp.com

Changes in v4:
- Addressed remaining DCIF driver comments from Frank;
- Limit the 'ldb' child node only to CSRs compatible with 'nxp,imx94-lvds-csr'
  in the binding file. Since LVDS CSRs are a minority, I chose to
  use the if:then: construct instead of if:not:then:;
- Remove the '#address-cells' and '#size-cells' from the ldb node, in
  imx94.dtsi, as they're not needed;
- Link to v3: https://lore.kernel.org/r/20250806150521.2174797-1-laurentiu.palcu@oss.nxp.com

Changes in v3:
- Removed the BLK CTL patches and created a separate patch set [2] for them;
- Collected r-b tags for 1/9, 2/9, 3/9 and 9/9;
- Removed the DCIF QoS functionality until I find a better way to
  implement it through syscon. QoS functionality will be added in
  subsequent patches. Also, used devm_clk_bulk_get_all() and used
  dev_err_probe() as suggested;
- Addressed Frank's and Krzysztof's comments on the DCIF bindings;
- Addressed Frank's comments on dtsi and dts files;
- Added a new binding patch, 6/9, for adding 'ldb' optional property to
  nxp,imx95-blk-ctl.yaml;
- Link to v2: https://lore.kernel.org/r/20250716081519.3400158-1-laurentiu.palcu@oss.nxp.com

Changes in v2:
- reworked the BLK_CTL patch and split in 2 to make it easier for
  review;
- split the dts and dtsi patch in 2 separate ones;
- addressed Frank's comments in DCIF driver;
- addressed Rob's comments for the bindings files;
- addressed a couple of checkpatch issues;
- Link to v1: https://lore.kernel.org/r/20250709122332.2874632-1-laurentiu.palcu@oss.nxp.com

---
Laurentiu Palcu (7):
      dt-bindings: display: fsl,ldb: Add i.MX94 LDB
      drm/bridge: fsl-ldb: Add support for i.MX94
      dt-bindings: display: imx: Add i.MX94 DCIF
      dt-bindings: clock: nxp,imx95-blk-ctl: Add ldb child node
      arm64: dts: imx943: Add display pipeline nodes
      arm64: dts: imx943-evk: Add display support using IT6263
      MAINTAINERS: Add entry for i.MX94 DCIF driver

Liu Ying (1):
      drm/bridge: fsl-ldb: Get the next non-panel bridge

Sandor Yu (1):
      drm/imx: Add support for i.MX94 DCIF

 .../bindings/clock/nxp,imx95-blk-ctl.yaml          |  26 +
 .../bindings/display/bridge/fsl,ldb.yaml           |   2 +
 .../bindings/display/imx/nxp,imx94-dcif.yaml       |  82 +++
 MAINTAINERS                                        |   9 +
 arch/arm64/boot/dts/freescale/imx943-evk.dts       |  59 ++
 arch/arm64/boot/dts/freescale/imx943.dtsi          |  53 +-
 drivers/gpu/drm/bridge/fsl-ldb.c                   |  46 +-
 drivers/gpu/drm/imx/Kconfig                        |   1 +
 drivers/gpu/drm/imx/Makefile                       |   1 +
 drivers/gpu/drm/imx/dcif/Kconfig                   |  15 +
 drivers/gpu/drm/imx/dcif/Makefile                  |   5 +
 drivers/gpu/drm/imx/dcif/dcif-crc.c                | 211 +++++++
 drivers/gpu/drm/imx/dcif/dcif-crc.h                |  52 ++
 drivers/gpu/drm/imx/dcif/dcif-crtc.c               | 695 +++++++++++++++++++++
 drivers/gpu/drm/imx/dcif/dcif-drv.c                | 228 +++++++
 drivers/gpu/drm/imx/dcif/dcif-drv.h                |  86 +++
 drivers/gpu/drm/imx/dcif/dcif-kms.c                | 100 +++
 drivers/gpu/drm/imx/dcif/dcif-plane.c              | 269 ++++++++
 drivers/gpu/drm/imx/dcif/dcif-reg.h                | 267 ++++++++
 19 files changed, 2185 insertions(+), 22 deletions(-)
---
base-commit: cd8eb1cf3dad15dad65060f5d18a59ab99485d01
change-id: 20250911-dcif-upstreaming-3e16d89c3385
prerequisite-patch-id: b2acaaf7e92a5c8e377e6b56f3a9ee7409f64b00

Best regards,
-- 
Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>

On Thu, 22 Jan 2026 09:01:38 +0000, Laurentiu Palcu wrote:
> Hi,
> 
> This patch-set adds support for the i.MX94 Display Control Interface.
> It depends on Peng Fan's DTS patch [1] that was not yet merged.
> 
> Also, included in the patch-set are a few extra patches that the DCIF
> driver depends on for functioning properly:
>  * 1/9 - 3/9 : add support for i.MX94 to fsl-ldb driver. It also
>                contains a patch (2/9) from Liu Ying that was already reviewed
>                and was part of another patch-set ([2]), but was never merged;
> 
> Thanks,
> Laurentiu
> 
> [1] https://lkml.org/lkml/2025/7/7/84
> [2] https://lkml.org/lkml/2024/11/14/262
> 
> ---
> Changes in v7:
> - Rebased to latest linux-next;
> - Addressed some new checkpatch warnings: kzalloc -> kzalloc_obj;
> - Fixed a couple of static check warnings in probe();
> - Added Luca's r-b tag for bridge refcounting;
> - Link to v6: https://lore.kernel.org/r/20251103-dcif-upstreaming-v6-0-76fcecfda919@oss.nxp.com
> 
> Changes in v6:
> - 2/9: Collected r-b tag from Francesco;
> - 3/9: Removed ch_max_clk_khz variable as suggested by Luca and added
>   his r-b tag;
> - 4/9: Collected r-b tag;
> - 5/9: Call drm_bridge_put() automatically in
>   dcif_crtc_query_output_bus_format() by using a cleanup action (Luca);
> - 6/9: Moved allOf: block after required: block (Krzysztof). Collected
>   r-b tag;
> - Link to v5: https://lore.kernel.org/r/20250911-dcif-upstreaming-v5-0-a1e8dab8ae40@oss.nxp.com
> 
> Changes in v5:
> - 4/9: Removed "bindings for" from the title, changed the port
>   definition and simplified the example;
> - 6/9: Fixed the way 'ldb' child node is declared: declare the
>   'ldb' child node out of if:then: block and set the property
>   to false for compatibles other than nxp,imx94-lvds-csr;
> - Link to v4: https://lore.kernel.org/r/20250903123332.2569241-1-laurentiu.palcu@oss.nxp.com
> 
> Changes in v4:
> - Addressed remaining DCIF driver comments from Frank;
> - Limit the 'ldb' child node only to CSRs compatible with 'nxp,imx94-lvds-csr'
>   in the binding file. Since LVDS CSRs are a minority, I chose to
>   use the if:then: construct instead of if:not:then:;
> - Remove the '#address-cells' and '#size-cells' from the ldb node, in
>   imx94.dtsi, as they're not needed;
> - Link to v3: https://lore.kernel.org/r/20250806150521.2174797-1-laurentiu.palcu@oss.nxp.com
> 
> Changes in v3:
> - Removed the BLK CTL patches and created a separate patch set [2] for them;
> - Collected r-b tags for 1/9, 2/9, 3/9 and 9/9;
> - Removed the DCIF QoS functionality until I find a better way to
>   implement it through syscon. QoS functionality will be added in
>   subsequent patches. Also, used devm_clk_bulk_get_all() and used
>   dev_err_probe() as suggested;
> - Addressed Frank's and Krzysztof's comments on the DCIF bindings;
> - Addressed Frank's comments on dtsi and dts files;
> - Added a new binding patch, 6/9, for adding 'ldb' optional property to
>   nxp,imx95-blk-ctl.yaml;
> - Link to v2: https://lore.kernel.org/r/20250716081519.3400158-1-laurentiu.palcu@oss.nxp.com
> 
> Changes in v2:
> - reworked the BLK_CTL patch and split in 2 to make it easier for
>   review;
> - split the dts and dtsi patch in 2 separate ones;
> - addressed Frank's comments in DCIF driver;
> - addressed Rob's comments for the bindings files;
> - addressed a couple of checkpatch issues;
> - Link to v1: https://lore.kernel.org/r/20250709122332.2874632-1-laurentiu.palcu@oss.nxp.com
> 
> ---
> Laurentiu Palcu (7):
>       dt-bindings: display: fsl,ldb: Add i.MX94 LDB
>       drm/bridge: fsl-ldb: Add support for i.MX94
>       dt-bindings: display: imx: Add i.MX94 DCIF
>       dt-bindings: clock: nxp,imx95-blk-ctl: Add ldb child node
>       arm64: dts: imx943: Add display pipeline nodes
>       arm64: dts: imx943-evk: Add display support using IT6263
>       MAINTAINERS: Add entry for i.MX94 DCIF driver
> 
> Liu Ying (1):
>       drm/bridge: fsl-ldb: Get the next non-panel bridge
> 
> Sandor Yu (1):
>       drm/imx: Add support for i.MX94 DCIF
> 
>  .../bindings/clock/nxp,imx95-blk-ctl.yaml          |  26 +
>  .../bindings/display/bridge/fsl,ldb.yaml           |   2 +
>  .../bindings/display/imx/nxp,imx94-dcif.yaml       |  82 +++
>  MAINTAINERS                                        |   9 +
>  arch/arm64/boot/dts/freescale/imx943-evk.dts       |  59 ++
>  arch/arm64/boot/dts/freescale/imx943.dtsi          |  53 +-
>  drivers/gpu/drm/bridge/fsl-ldb.c                   |  46 +-
>  drivers/gpu/drm/imx/Kconfig                        |   1 +
>  drivers/gpu/drm/imx/Makefile                       |   1 +
>  drivers/gpu/drm/imx/dcif/Kconfig                   |  15 +
>  drivers/gpu/drm/imx/dcif/Makefile                  |   5 +
>  drivers/gpu/drm/imx/dcif/dcif-crc.c                | 211 +++++++
>  drivers/gpu/drm/imx/dcif/dcif-crc.h                |  52 ++
>  drivers/gpu/drm/imx/dcif/dcif-crtc.c               | 695 +++++++++++++++++++++
>  drivers/gpu/drm/imx/dcif/dcif-drv.c                | 228 +++++++
>  drivers/gpu/drm/imx/dcif/dcif-drv.h                |  86 +++
>  drivers/gpu/drm/imx/dcif/dcif-kms.c                | 100 +++
>  drivers/gpu/drm/imx/dcif/dcif-plane.c              | 269 ++++++++
>  drivers/gpu/drm/imx/dcif/dcif-reg.h                | 267 ++++++++
>  19 files changed, 2185 insertions(+), 22 deletions(-)
> ---
> base-commit: cd8eb1cf3dad15dad65060f5d18a59ab99485d01
> change-id: 20250911-dcif-upstreaming-3e16d89c3385
> prerequisite-patch-id: b2acaaf7e92a5c8e377e6b56f3a9ee7409f64b00
> 
> Best regards,
> --
> Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
> 
> 


My bot found new DTB warnings on the .dts files added or changed in this
series.

Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
are fixed by another series. Ultimately, it is up to the platform
maintainer whether these warnings are acceptable or not. No need to reply
unless the platform maintainer has comments.

If you already ran DT checks and didn't see these error(s), then
make sure dt-schema is up to date:

  pip3 install dtschema --upgrade


This patch series was applied (using b4) to base:
 Deps: looking for dependencies matching 1 patch-ids
 Deps: Applying prerequisite patch: [PATCH v3 6/6] arm64: dts: imx943: Add LVDS/DISPLAY CSR nodes
 Base: base-commit cd8eb1cf3dad15dad65060f5d18a59ab99485d01 not known, ignoring
 Base: attempting to guess base-commit...
 Base: tags/next-20260121 (best guess, 6/8 blobs matched)
 Base: tags/next-20260121 (use --merge-base to override)

If this is not the correct base, please add 'base-commit' tag
(or use b4 which does this automatically)


New warnings running 'make CHECK_DTBS=y for arch/arm64/boot/dts/freescale/' for 20260122-dcif-upstreaming-v7-0-19ea17eb046f@oss.nxp.com:

arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'ivdd-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'ovdd-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'txavcc18-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'txavcc33-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'pvcc1-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'pvcc2-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'avcc-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'anvdd-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml
arch/arm64/boot/dts/freescale/imx943-evk.dtb: lvds-to-hdmi-bridge@4c (ite,it6263): 'apvdd-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml