linux-kernel - [PATCH v3 0/2] Add DSS support for TI AM62A7 SoC

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Message-ID: <20231108171619.978438-1-a-bhatia1@ti.com>
Date:   Wed, 8 Nov 2023 22:46:17 +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>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.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>,
        Devarsh Thakkar <devarsht@...com>,
        Jayesh Choudhary <j-choudhary@...com>,
        Jai Luthra <j-luthra@...com>, Aradhya Bhatia <a-bhatia1@...com>
Subject: [PATCH v3 0/2] Add DSS support for TI AM62A7 SoC

This patch series adds a new compatible for the Display SubSystem (DSS)
controller on TI's AM62A7 SoC. It further adds the required support, for
the same, in the tidss driver.

The DSS controller is similar to the recently added AM625 DSS, with the
key difference being the absence of VP1 output on the SoC. The VP1 in
AM62A7 DSS is tied off and cannot be used, unlike in AM625, where the
VP1 was connected to 2 OLDI TXes. The video pipeline that corresponds to
VP1 still exists and can be used to overlay planes on the VP2's primary
plane. This can be done using the overlay managers inside the SoC.
Moreover, DSS VP2 can output Full-HD RGB888 DPI video signals.

I have tested these patches on AM62A7 SK-EVM, which converts DPI signals
to HDMI on the platform using the Sil9022A HDMI transmitter. All the
patches, required to enable display on AM62A7-SK, can be found on my
github fork[0] in the branch "next_am62a-v3".

Regards
Aradhya

[0]: https://github.com/aradhya07/linux-ab/tree/next_am62a-v3

Change Log:
V2 -> V3:
  - Add Krzysztof Kozlowski's R-b in patch 1/2.
  - Add new DISPC_VP_TIED_OFF for tied-off video-ports in patch 2/2.

V1 -> V2:
  - Correctly sort DISPC_AM62A7 macro after DISPC_AM625 in patch 2/2.

Previous Versions:
V1: https://lore.kernel.org/all/20230818131750.4779-1-a-bhatia1@ti.com/
V2: https://lore.kernel.org/all/20230818142124.8561-1-a-bhatia1@ti.com/

Aradhya Bhatia (2):
  dt-bindings: display: ti: Add support for am62a7 dss
  drivers/tidss: Add support for AM62A7 DSS

 .../bindings/display/ti/ti,am65x-dss.yaml     | 14 +++++
 drivers/gpu/drm/tidss/tidss_dispc.c           | 59 +++++++++++++++++++
 drivers/gpu/drm/tidss/tidss_dispc.h           |  3 +
 drivers/gpu/drm/tidss/tidss_drv.c             |  1 +
 4 files changed, 77 insertions(+)

base-commit: 2220f68f4504aa1ccce0fac721ccdb301e9da32f
-- 
2.42.0