Hi,
This patch-set adds support for the i.MX94 Display Control Interface.
Also, included in the patch-set is patch 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 ([1]), but was never merged;
Thanks,
Laurentiu
[1] https://lkml.org/lkml/2024/11/14/262
---
Changes in v9:
- Rebased to latest linux-next (next-20260611);
- 2/9: Reworked to store the next bridge in fsl_ldb->bridge.next_bridge
(taking a reference with drm_bridge_get()) instead of adding a new
dedicated field. Removed the r-b tags for this patch since it needs a
fresh review;
- 3/9: Fixed the i.MX94 LDB max_clk_khz limit (165 MHz -> 148.5 MHz) to
match the actual hardware limit. Removed the r-b tags for this patch
since it needs a fresh review;
- 4/9: Added a 'required:' properties list to the binding. Removed
Krzysztof's r-b tag for this patch since it needs a fresh review;
- 5/9: Renamed the CRC source helpers (dcif_crc_source_*) and made them
unconditionally available, dropping the CONFIG_DEBUG_FS stubs;
improved CRC source parsing (auto ROI for the full-frame source,
unsigned params, safer string handling); rebased onto the
drm_atomic_state -> drm_atomic_commit rename in linux-next; reworked
CRC/modeset gating with new has_crc and crtc_pm_enabled flags and
proper PM error handling; switched event_lock to spinlock_irq; removed
a redundant connector-attach call and fixed an error format string;
added new pixel formats and full alpha/blend-mode support;
- 6/9: YAML quoting style fix only, no functional change;
- 7/9: Combined the former "arm64: dts: imx943: Add LVDS/DISPLAY CSR
nodes" prerequisite and the "arm64: dts: imx943: Add display pipeline
nodes" patch into a single new patch targeting the shared imx94.dtsi
instead of imx943.dtsi, removing the dependency on Peng Fan's
not-yet-merged patch;
- 8/9: Renamed the IT6263 bridge node to 'hdmi@4c' and fixed its
reset-gpios polarity to GPIO_ACTIVE_LOW;
- Link to v8: https://lore.kernel.org/r/20260304-dcif-upstreaming-v8-0-bec5c047edd4@oss.nxp.com
Changes in v8:
- Rebased to latest linux-next (next-20260303). Patch 2/9 had a minor
conflict bacause of a patch introduced recently;
- 8/9: Fixed CHECK_DTBS errors reported by Rob's bot due to missing
regulators. Removed the r-b tag for this patch because it needs a
fresh review;
- Link to v7: https://lore.kernel.org/r/20260122-dcif-upstreaming-v7-0-19ea17eb046f@oss.nxp.com
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: imx94: 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 | 90 +++
MAINTAINERS | 9 +
arch/arm64/boot/dts/freescale/imx94.dtsi | 82 +++
arch/arm64/boot/dts/freescale/imx943-evk.dts | 86 +++
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 | 215 +++++++
drivers/gpu/drm/imx/dcif/dcif-crc.h | 43 ++
drivers/gpu/drm/imx/dcif/dcif-crtc.c | 705 +++++++++++++++++++++
drivers/gpu/drm/imx/dcif/dcif-drv.c | 233 +++++++
drivers/gpu/drm/imx/dcif/dcif-drv.h | 89 +++
drivers/gpu/drm/imx/dcif/dcif-kms.c | 96 +++
drivers/gpu/drm/imx/dcif/dcif-plane.c | 308 +++++++++
drivers/gpu/drm/imx/dcif/dcif-reg.h | 267 ++++++++
19 files changed, 2299 insertions(+), 20 deletions(-)
---
base-commit: e7b907ffb2cd66314df92360e41f7bd5fdaa8182
change-id: 20260602-dcif-upstreaming-fb177f3c9351
Best regards,
--
Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>