linux-kernel - [PATCH v2 0/4] gpu/drm: tegra: add DSI support for Tegra20/Tegra30

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Message-ID: <20250906131655.239340-1-clamor95@gmail.com>
Date: Sat,  6 Sep 2025 16:16:51 +0300
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Thierry Reding <treding@...dia.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Mikko Perttunen <mperttunen@...dia.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Svyatoslav Ryhel <clamor95@...il.com>,
	Dmitry Osipenko <digetx@...il.com>,
	Charan Pedumuru <charan.pedumuru@...il.com>
Cc: devicetree@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH v2 0/4] gpu/drm: tegra: add DSI support for Tegra20/Tegra30

Tegra20/Tegra30 DSI is quite similar to Tegra114+ apart MIPI calibration
logic and clocks. With a few minor tweaks, existing tegra DSI driver
should work on Tegra20/Tegra30 devices just fine. Tested on
Motorola Atrix 4G (T20) and ASUS VivoTab RT TF600T (T30).

This patchset depends on Tegra20/Tegra30 CSI bringup since both share
MIPI calibration logic. Ideally these patches should be picked after
CSI bringup but they will not break anything even if picked before
CSI patches.

---
Changes in v2:
- removed all MIPI calibration, it is handled within CSI bringup
- added per-soc structures into of_match
- added fix for hang caused by register access with uninited hw
---

Svyatoslav Ryhel (4):
  clk: tegra20: reparent dsi clock to pll_d_out0
  gpu/drm: tegra: dsi: move prepare function at the top of encoder
    enable
  gpu/drm: tegra: dsi: add support for Tegra20/Tegra30
  ARM: tegra: adjust DSI nodes for Tegra20/Tegra30

 arch/arm/boot/dts/nvidia/tegra20.dtsi |   4 ++
 arch/arm/boot/dts/nvidia/tegra30.dtsi |   8 +++
 drivers/clk/tegra/clk-tegra20.c       |   6 +-
 drivers/gpu/drm/tegra/drm.c           |   2 +
 drivers/gpu/drm/tegra/dsi.c           | 100 ++++++++++++++++----------
 drivers/gpu/drm/tegra/dsi.h           |  15 ++++
 6 files changed, 95 insertions(+), 40 deletions(-)

-- 
2.48.1