linux-kernel - Re: [PATCH v2 0/7] imx-drm: ipuv3-crtc: Implement mode

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Date:	Fri, 23 Jan 2015 12:44:21 -0200
From:	Fabio Estevam <festevam@...il.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
Cc:	Liu Ying <Ying.Liu@...escale.com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	Steve Longerbeam <steve_longerbeam@...tor.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	Denis Carikli <denis@...rea.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Steve Longerbeam <slongerbeam@...il.com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Subject: Re: [PATCH v2 0/7] imx-drm: ipuv3-crtc: Implement mode_fixup

Hi Philipp,

On Fri, Jan 23, 2015 at 8:50 AM, Philipp Zabel <p.zabel@...gutronix.de> wrote:

> What are this panel timings? The adjustment should increase the vertical
> back porch by up to two lines (so it is at least two lines), reducing
> the front porch or vsync length by the same amount. Does this panel use
> the HSYNC/VSYNC signals embedded in the LVDS stream?

The panel on this board is a Hannstar HSD100PXN1. The timings we use
are described in imx6qdl-sabresd.dtsi:

        display-timings {
            native-mode = <&timing0>;
            timing0: hsd100pxn1 {
                clock-frequency = <65000000>;
                hactive = <1024>;
                vactive = <768>;
                hback-porch = <220>;
                hfront-porch = <40>;
                vback-porch = <21>;
                vfront-porch = <7>;
                hsync-len = <60>;
                vsync-len = <10>;
            };
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