linux-kernel - [PATCH v3 0/6] Support for Exynos7870's display stack (DECON, MIPIPHY, DSIM, etc.)

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Message-Id: <20250928-exynos7870-drm-dts-v3-0-bb7d8e570860@disroot.org>
Date: Sun, 28 Sep 2025 23:26:34 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH v3 0/6] Support for Exynos7870's display stack (DECON,
 MIPIPHY, DSIM, etc.)

Exynos7870 has a IP subsystem in its architecture dedicated to display
management. Notably, this block includes the Display Enhancement
Controller (DECON), and the DSI Master (DSIM).

The following series and its sub-series implement all components for a
functioning display pipeline. All vital information which helped shaping
up the patches have been retrieved from Exynos7870 vendor kernel sources
as provided by Samsung.

Testing has been done on all three devices available upstream, i.e.
Samsung Galaxy J7 Prime (samsung-on7xelte), Samsung Galaxy A2 Core
(samsung-a2corelte), and Samsung Galaxy J6 (samsung-j6lte). Regrettably,
I've only been able to test the functionality on video mode, as none of
the devices have panels working in command mode.

This series implements changes in the SoC subsystem, which includes
devicetree additions. It depends on all sub-series listed below:
(Legend: [R]eviewed, [A]ccepted)

exynos-sysmmu-resv-regions A https://lore.kernel.org/r/20250712-exynos-sysmmu-resv-regions-v1-1-e79681fcab1a@disroot.org
exynos7870-mipi-phy        A https://lore.kernel.org/r/20250612-exynos7870-mipi-phy-v1-0-3fff0b62d9d3@disroot.org
exynos7870-mipi-phy-fix    A https://lore.kernel.org/r/20250710-exynos7870-mipi-phy-fix-v2-1-5cf50d69c9d7@disroot.org
exynos7870-dsim            A https://lore.kernel.org/r/20250706-exynos7870-dsim-v3-0-9879fb9a644d@disroot.org
exynosdrm-decon            A https://lore.kernel.org/r/20250706-exynosdrm-decon-v4-0-735fd215f4b3@disroot.org
panel-samsung-s6e8aa5x01   A https://lore.kernel.org/r/20250721-panel-samsung-s6e8aa5x01-v5-0-1a315aba530b@disroot.org
panel-synaptics-tddi       - https://lore.kernel.org/r/20250625-panel-synaptics-tddi-v2-0-7a62ab1d13c7@disroot.org

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
Changes in v3:
- fixed minor issues with devicetree in regards to compliance
- added memory-region to framebuffer region for decon device
- added related patchset to list: exynos-sysmmu-resv-regions
- replaced exynos7870-pmu with exynos7-pmu compatible to the list
  allowing a MIPI PHY subnode (krzk)
- updated compatible string and dt node for j6lte's panel
- reorder properties: ${x}, followed by ${x}-names (krzk)
- Link to v2: https://lore.kernel.org/r/20250627-exynos7870-drm-dts-v2-0-d4a59207390d@disroot.org

Changes in v2:
- modified compatible hierarchy to use non-deprecated syntax (krzk)
- fixed subject prefixes of [v1 2/5], [v1 3/5], [v1 4/5], [v1 5/5] (krzk)
- removed simplefb nodes instead of disabling it (krzk)
- added dt-bindings patch to allow mipi-phy node under PMU
- changed clock names of dsim node
- Link to v1: https://lore.kernel.org/r/20250612-exynos7870-drm-dts-v1-0-88c0779af6cb@disroot.org

---
Kaustabh Chakraborty (6):
      dt-bindings: samsung: exynos-sysreg: add exynos7870 sysregs
      dt-bindings: soc: samsung: exynos-pmu: allow mipi-phy subnode for Exynos7 PMU
      arm64: dts: exynos7870: add DSI support
      arm64: dts: exynos7870-on7xelte: enable display panel support
      arm64: dts: exynos7870-a2corelte: enable display panel support
      arm64: dts: exynos7870-j6lte: enable display panel support

 .../bindings/soc/samsung/exynos-pmu.yaml           |  1 +
 .../soc/samsung/samsung,exynos-sysreg.yaml         |  2 +
 .../arm64/boot/dts/exynos/exynos7870-a2corelte.dts | 57 +++++++++++----
 arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts    | 38 ++++++----
 arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts | 57 +++++++++++----
 arch/arm64/boot/dts/exynos/exynos7870.dtsi         | 84 ++++++++++++++++++++++
 6 files changed, 197 insertions(+), 42 deletions(-)
---
base-commit: 262858079afde6d367ce3db183c74d8a43a0e83f
change-id: 20250523-exynos7870-drm-dts-87ccab731ba9

Best regards,
-- 
Kaustabh Chakraborty <kauschluss@...root.org>