linux-kernel - Re: [PATCH] drm/rockchip: vop: fix vop vsync/hsync polarity

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Date:	Sat, 24 Jan 2015 16:13:46 +0100
From:	Heiko Stübner <heiko@...ech.de>
To:	dri-devel@...ts.freedesktop.org
Cc:	Mark Yao <mark.yao@...k-chips.com>,
	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Daniel Kurtz <djkurtz@...omium.org>,
	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH] drm/rockchip: vop: fix vop vsync/hsync polarity

Am Donnerstag, 22. Januar 2015, 11:15:02 schrieb Mark Yao:
> Vop set wrong vsync/hsync polarity, it may cause some
> display problem. known problem is that caused HDMI hdcp
> authenticate failed, caused pixel offset with hdmi display.
> the polarity description at RK3288 TRM doc:
>   dsp_vsync_pol
>     VSYNC polarity
>       1'b0 : negative
>       1'b1 : positive
>       dsp_hsync_pol
>     HSYNC polarity
>       1'b0 : negative
>       1'b1 : positive
> 
> Signed-off-by: Mark Yao <mark.yao@...k-chips.com>
> ---

on a rk3288-firefly board with a sda7123 vga connector
Tested-by: Heiko Stuebner <heiko@...ech.de>


Heiko
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