linux-kernel - Re: [PATCH v3 0/2] MIPI DSI phy for rk3588

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Message-ID: <20241120093702.9018-1-dse@thaumatec.com>
Date: Wed, 20 Nov 2024 10:36:38 +0100
From: Daniel Semkowicz <dse@...umatec.com>
To: heiko@...ech.de
Cc: conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	kishon@...nel.org,
	krzk+dt@...nel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-phy@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	quentin.schulz@...rry.de,
	robh@...nel.org,
	sebastian.reichel@...labora.com,
	vkoul@...nel.org,
	Daniel Semkowicz <dse@...umatec.com>
Subject: Re: [PATCH v3 0/2] MIPI DSI phy for rk3588

Hello Heiko,

> This adds the phy driver need for DSI output on rk3588.
> 
> The phy itself is used for both DSI output and CSI input, though the
> CSI part for the whole chain needs a lot more work, so is left out for
> now and only the DSI part implemented.
> 
> This allows the rk3588 with its current VOP support to drive a DSI display
> using the DSI2 controller driver I'll submit in a next step.
> 
> Only generic phy interfaces are used, so the DSI part is pretty straight
> forward.
> 
> changes in v3:
> - add Krzysztof review tag to the binding
> - address Sebastian's review comments
>   - better error handling
>   - dropping empty function
>   - headers
>   - not using of_match_ptr - this should also make the
>     test-robot happier
> 
> changes in v2:
> - fix error in dt-binding example
> - drop unused frequency table
> - pull in some more recent improvements from the vendor-kernel
>   which includes a lot less magic values
> - already include the support for rk3576
> - use dev_err_probe
> 
> Heiko Stuebner (2):
>   dt-bindings: phy: Add Rockchip MIPI CSI/DSI PHY schema
>   phy: rockchip: Add Samsung CSI/DSI Combo DCPHY driver
> 
>  .../phy/rockchip,rk3588-mipi-dcphy.yaml       |   82 +
>  drivers/phy/rockchip/Kconfig                  |   12 +
>  drivers/phy/rockchip/Makefile                 |    1 +
>  .../phy/rockchip/phy-rockchip-samsung-dcphy.c | 1647 +++++++++++++++++
>  4 files changed, 1742 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/rockchip,rk3588-mipi-dcphy.yaml
>  create mode 100644 drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
> 
> -- 
> 2.45.2

Thank you very much for these patches!

I tested this series on top of v6.12 with DSI/LVDS bridge
in the following configuration:

RK3588 Tiger SoM (dsi0) --> TC358775 DSI/LVDS bridge --> LVDS display

I did not observe any undesirable artifacts on the display.
Display blank/unblank works correctly.

Tested-by: Daniel Semkowicz <dse@...umatec.com>

Kind regards
Daniel