linux-kernel - [PATCH v3 0/2] gpu/drm: tegra: add DSI support for Tegra20/Tegra30

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Message-ID: <20260125131323.45108-1-clamor95@gmail.com>
Date: Sun, 25 Jan 2026 15:13:21 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Thierry Reding <thierry.reding@...il.com>,
	Mikko Perttunen <mperttunen@...dia.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Diogo Ivo <diogo.ivo@...nico.ulisboa.pt>,
	Svyatoslav Ryhel <clamor95@...il.com>
Cc: dri-devel@...ts.freedesktop.org,
	linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/2] 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

Changes in v3:
- switched from version DSI to boolean flags
- added comment regarding Tegra30 clock configuration
- commits were picked:
  "clk: tegra20: reparent dsi clock to pll_d_out0"
  "ARM: tegra: adjust DSI nodes for Tegra20/Tegra30"
- commit adapted to recent DSI changes:
  "gpu/drm: tegra: dsi: move prepare function at the top of encoder
    enable" > "gpu/drm: tegra: dsi: re-add clear enable register if
    DSI was powered by bootloader"
---

Svyatoslav Ryhel (2):
  gpu/drm: tegra: dsi: add support for Tegra20/Tegra30
  gpu/drm: tegra: dsi: re-add clear enable register if DSI was powered
    by bootloader

 drivers/gpu/drm/tegra/drm.c |   2 +
 drivers/gpu/drm/tegra/dsi.c | 116 ++++++++++++++++++++++++++----------
 drivers/gpu/drm/tegra/dsi.h |  10 ++++
 3 files changed, 97 insertions(+), 31 deletions(-)

-- 
2.51.0