linux-kernel - Re: [PATCH] drm/rockchip: vop2: Fix the update of LAYER/PORT select registers when there are multi display output on rk3588/rk3568

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Message-ID: <175199006061.1731917.645367019907326857.b4-ty@sntech.de>
Date: Tue,  8 Jul 2025 19:35:12 +0200
From: Heiko Stuebner <heiko@...ech.de>
To: Andy Yan <andyshrk@....com>
Cc: Heiko Stuebner <heiko@...ech.de>,
	hjc@...k-chips.com,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	derek.foreman@...labora.com,
	daniel@...ishbar.org,
	Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH] drm/rockchip: vop2: Fix the update of LAYER/PORT select registers when there are multi display output on rk3588/rk3568


On Mon, 21 Apr 2025 18:21:54 +0800, Andy Yan wrote:
> The all video ports of rk3568/rk3588 share the same OVL_LAYER_SEL
> and OVL_PORT_SEL registers, and the configuration of these two registers
> can be set to take effect when the vsync signal arrives at a certain Video
> Port.
> 
> If two threads for two display output choose to update these two registers
> simultaneously to meet their own plane adjustment requirements(change plane
> zpos or switch plane from one crtc to another), then no matter which Video
> Port'svsync signal we choose to follow for these two registers, the display
> output of the other Video Port will be abnormal.
> This is because the configuration of this Video Port does not take
> effect at the right time (its configuration should take effect when its
> VSYNC signal arrives).
> 
> [...]

Applied, thanks!

[1/1] drm/rockchip: vop2: Fix the update of LAYER/PORT select registers when there are multi display output on rk3588/rk3568
      commit: 3e89a8c6835476aa782da80585dee9ddae651eea

Best regards,
-- 
Heiko Stuebner <heiko@...ech.de>