On 20-04-2026 18:24, Tomi Valkeinen wrote:
This series aims to add display support for all display interfaces on
BeagleY-AI board. More generally, it adds display support for TI AM62P,
J722S, and related SoCs, and, as a bit extra, improves AM62L's DPI
handling.
The main topics to highlight:
- The ti,am625-dss-dpi0-clk-ctrl feels a bit like a hack.
But it is a single quirk register, among other registers that belong
to either the firmware or other drivers. So what other options are
there? This has already been discussed e.g. in
https://lore.kernel.org/all/20250730-fix-edge-handling-v1-0-1bdfb3fe7922%40bootlin.com/
without proper conclusion.
- The tidss OLDI support will now use auxiliary device/driver. This seems
to solve quite neatly the requirement to have a power-domain for each
OLDI. The main issue that remains is that on AM62P (and similar) we
will have three OLDI TX DT nodes, even if there are only two in the
hardware.
With this series one can use the HDMI output on BeagleY-AI. I have also
tested the DSI output with Raspberry Pi's 7" DSI display, and OLDI
output with an oscilloscope (I don't have a suitable OLDI panel).
Tomi
Signed-off-by: Tomi Valkeinen <[email protected]>
---
The series is tested on TI's AM62P[1] SoC and tested HDMI display and
audio output with BeagleY-AI(AM67A SoC[2]).
Display panels used:
--------------------
DSI Panel: https://www.raspberrypi.com/products/raspberry-pi-touch-display/
OLDI Panel: https://www.ti.com/tool/SK-LCD1
HDMI Panel: https://www.viewsonic.com/in/products/lcd/VA1655-3
Test branch:
https://github.com/jainswamil/linux-next/tree/AM62P_J722S_BEAGLEY_AI_DSS_V1_TEST
Got some DT check warnings with the above test branch[3].
Links
[1]: https://www.ti.com/product/AM62P
[2]: https://www.ti.com/product/AM67A
[3]: https://gist.github.com/jainswamil/945a9859c0f75b41ef21abeede405b2e
Tested-by: Swamil Jain <[email protected]>
Andrew Davis (1):
arm64: dts: ti: beagley-ai: Enable HDMI display and audio
Jayesh Choudhary (1):
arm64: dts: ti: k3-am62p-j722s-common-main: Add support for DSS
Swamil Jain (1):
drm/tidss: Add support for AM62P display subsystem
Tomi Valkeinen (12):
dt-bindings: display: ti: Move ti,am62l-dss binding to a new binding file
dt-bindings: display: ti,am65x-dss: Simplify binding
dt-bindings: mfd: syscon: Add ti,am625-dss-dpi0-clk-ctrl compatible
dt-bindings: display: ti,am625-oldi: Add optional power-domain for OLDI
dt-bindings: display: ti,am65x-dss: Add AM62P DSS
drm/tidss: Remove extra pm_runtime_mark_last_busy
drm/tidss: oldi: Remove define for unused register OLDI_LB_CTRL
drm/tidss: Add mechanism to detect DPI output
drm/tidss: Add external data and sync signal edge configuration
drm/tidss: Add support for DPIENABLE bit
drm/tidss: oldi: Fix OLDI signal polarities
drm/tidss: oldi: Convert OLDI to an aux driver
.../bindings/display/ti/ti,am625-oldi.yaml | 4 +
.../bindings/display/ti/ti,am62l-dss.yaml | 136 ++++++
.../bindings/display/ti/ti,am65x-dss.yaml | 176 +++----
Documentation/devicetree/bindings/mfd/syscon.yaml | 2 +
MAINTAINERS | 1 +
.../boot/dts/ti/k3-am62p-j722s-common-main.dtsi | 112 +++++
arch/arm64/boot/dts/ti/k3-am62p.dtsi | 16 +
arch/arm64/boot/dts/ti/k3-am67a-beagley-ai.dts | 197 ++++++++
arch/arm64/boot/dts/ti/k3-j722s.dtsi | 16 +
drivers/gpu/drm/tidss/tidss_crtc.c | 10 +-
drivers/gpu/drm/tidss/tidss_crtc.h | 4 +-
drivers/gpu/drm/tidss/tidss_dispc.c | 46 +-
drivers/gpu/drm/tidss/tidss_dispc.h | 5 +-
drivers/gpu/drm/tidss/tidss_dispc_regs.h | 5 +
drivers/gpu/drm/tidss/tidss_drv.c | 54 ++-
drivers/gpu/drm/tidss/tidss_drv.h | 5 +-
drivers/gpu/drm/tidss/tidss_kms.c | 55 ++-
drivers/gpu/drm/tidss/tidss_oldi.c | 531 +++++++++++++++------
drivers/gpu/drm/tidss/tidss_oldi.h | 8 +-
19 files changed, 1095 insertions(+), 288 deletions(-)
---
base-commit: 3131ff5a117498bb4b9db3a238bb311cbf8383ce
change-id: 20260420-beagley-ai-display-d7f634cde5f4
prerequisite-message-id: <[email protected]>
prerequisite-patch-id: 654d90f9cddec8b41e6fb1b3776a632606fef88c
Best regards,
