From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Date: Fri, 19 May 2017 20:03:30 +0200 Message-ID: <20170519180330.7hpfkdqk3r2x3kn5@flea.home> References: <20170517164354.16399-1-icenowy@aosc.io> <20170517164354.16399-8-icenowy@aosc.io> Reply-To: maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="p2w6z7xlkbrkzjzj" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Content-Disposition: inline In-Reply-To: <20170517164354.16399-8-icenowy-h8G6r0blFSE@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Icenowy Zheng Cc: Rob Herring , Chen-Yu Tsai , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org List-Id: devicetree@vger.kernel.org --p2w6z7xlkbrkzjzj Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline On Thu, May 18, 2017 at 12:43:50AM +0800, Icenowy Zheng wrote: > Allwinner H3 features a TV encoder similar to the one in earlier SoCs, > but with some different points about clocks: > - It has a mod clock and a bus clock. > - The mod clock must be at a fixed rate to generate signal. Why? Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com --p2w6z7xlkbrkzjzj--