linux-kernel - [PATCH 0/4] drm/tidss: Add OLDI bridge support

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Date: Sun, 12 May 2024 01:00:51 +0530
From: Aradhya Bhatia <a-bhatia1@...com>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Jyri Sarha
	<jyri.sarha@....fi>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Laurent Pinchart
	<Laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...il.com>, Daniel
 Vetter <daniel@...ll.ch>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: DRI Development List <dri-devel@...ts.freedesktop.org>,
        Devicetree List
	<devicetree@...r.kernel.org>,
        Linux Kernel List
	<linux-kernel@...r.kernel.org>,
        Nishanth Menon <nm@...com>, Vignesh
 Raghavendra <vigneshr@...com>,
        Praneeth Bajjuri <praneeth@...com>, Udit Kumar
	<u-kumar1@...com>,
        Francesco Dolcini <francesco@...cini.it>,
        Alexander
 Sverdlin <alexander.sverdlin@...mens.com>,
        Randolph Sapp <rs@...com>, Devarsh
 Thakkar <devarsht@...com>,
        Jayesh Choudhary <j-choudhary@...com>, Jai Luthra
	<j-luthra@...com>,
        Aradhya Bhatia <a-bhatia1@...com>
Subject: [PATCH 0/4] drm/tidss: Add OLDI bridge support

Hello all,

This patch series add support for the dual OLDI TXes supported in Texas
Instruments' AM62x and AM62Px family of SoCs. The OLDI TXes support single-lvds,
lvds-clone, and dual-lvds modes. These have now been represented through DRM
bridges within TI-DSS.

The OLDI configuration should happen before the video-port configuration takes
place in tidss_crtc_atomic_enable hook. I have posted a patch allowing DRM
bridges to get enabled before the CRTC of that bridge is enabled[0]. The patch
4/4 of this series uses the bridge hooks introduced in [0], and hence will not
compile without [0].

This patch series is a complete re-vamp from the previously posted series[1] and
hence, the version index has been reset to v1. The OLDI support from that series
was dropped and only the base support for AM625 DSS was kept (and eventually
merged)[2].

These patches have been tested on AM625 based platforms, SK-AM625 EVM with a
Microptis dual-lvds panel (SK-LCD1), and Beagleplay with a Lincolntech dual-lvds
panel (LCD-185T). The patches with complete support including the expected
devicetree configuration of the OLDI TXes can be found in the
"next_oldi_finals-v1-tests" branch of my github fork[3].

Thanks,
Aradhya

[0]: Dependency Patch: Introduce early_enable / late_disable drm bridge APIs
https://lore.kernel.org/all/20240511153051.1355825-7-a-bhatia1@ti.com/

[1]: AM62 OLDI Series - v7
https://lore.kernel.org/all/20230125113529.13952-1-a-bhatia1@ti.com/

[2]: AM62 DSS Series - v9
https://lore.kernel.org/all/20230616150900.6617-1-a-bhatia1@ti.com/

[3]: GitHub Fork for OLDI tests
https://github.com/aradhya07/linux-ab/tree/next_oldi_finals-v1-tests


Aradhya Bhatia (4):
  dt-bindings: display: ti,am65x-dss: Minor Cleanup
  dt-bindings: display: ti: Add schema for AM625 OLDI Transmitter
  dt-bindings: display: ti,am65x-dss: Add OLDI properties for AM625 DSS
  drm/tidss: Add OLDI bridge support

 .../bindings/display/ti/ti,am625-oldi.yaml    | 153 +++++
 .../bindings/display/ti/ti,am65x-dss.yaml     | 178 +++++-
 MAINTAINERS                                   |   1 +
 drivers/gpu/drm/tidss/Makefile                |   3 +-
 drivers/gpu/drm/tidss/tidss_dispc.c           |  11 +-
 drivers/gpu/drm/tidss/tidss_dispc.h           |   4 +
 drivers/gpu/drm/tidss/tidss_drv.c             |  13 +-
 drivers/gpu/drm/tidss/tidss_drv.h             |   4 +
 drivers/gpu/drm/tidss/tidss_oldi.c            | 568 ++++++++++++++++++
 drivers/gpu/drm/tidss/tidss_oldi.h            |  73 +++
 10 files changed, 983 insertions(+), 25 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml
 create mode 100644 drivers/gpu/drm/tidss/tidss_oldi.c
 create mode 100644 drivers/gpu/drm/tidss/tidss_oldi.h


base-commit: 75fa778d74b786a1608d55d655d42b480a6fa8bd
-- 
2.34.1