From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_NEOMUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E5C9C43441 for ; Mon, 19 Nov 2018 08:27:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6FF0B20684 for ; Mon, 19 Nov 2018 08:27:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6FF0B20684 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727132AbeKSSuE (ORCPT ); Mon, 19 Nov 2018 13:50:04 -0500 Received: from mail.bootlin.com ([62.4.15.54]:36958 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726175AbeKSSuE (ORCPT ); Mon, 19 Nov 2018 13:50:04 -0500 Received: by mail.bootlin.com (Postfix, from userid 110) id 3168820D0D; Mon, 19 Nov 2018 09:27:08 +0100 (CET) Received: from localhost (aaubervilliers-681-1-13-146.w90-88.abo.wanadoo.fr [90.88.134.146]) by mail.bootlin.com (Postfix) with ESMTPSA id 0481C2039F; Mon, 19 Nov 2018 09:27:08 +0100 (CET) Date: Mon, 19 Nov 2018 09:27:07 +0100 From: Maxime Ripard To: Jagan Teki Cc: Maarten Lankhorst , Sean Paul , David Airlie , Rob Herring , Chen-Yu Tsai , Icenowy Zheng , Jernej Skrabec , Vasily Khoruzhick , Thierry Reding , Mark Rutland , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Michael Trimarchi , TL Lim , linux-sunxi@googlegroups.com, linux-amarula@amarulasolutions.com Subject: Re: [PATCH v2 01/12] drm/sun4i: sun6i_mipi_dsi: Compute burst mode loop N1 instruction delay Message-ID: <20181119082707.kbsw2gyntxxbh6no@flea> References: <20181116163916.29621-1-jagan@amarulasolutions.com> <20181116163916.29621-2-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="e76qeq3cbnztemdd" Content-Disposition: inline In-Reply-To: <20181116163916.29621-2-jagan@amarulasolutions.com> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --e76qeq3cbnztemdd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Nov 16, 2018 at 10:09:05PM +0530, Jagan Teki wrote: > Loop N1 instruction delay for burst mode lcd panel are > computed as per BSP code. >=20 > Reference code is available in BSP (from linux-sunxi > drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) >=20 > dsi_dev[sel]->dsi_inst_loop_num.bits.loop_n1=3D > (panel->lcd_ht-panel->lcd_x)*(150)/(panel->lcd_dclk_freq*8) - 50; > =3D> (((mode->htotal - mode->hdisplay) * 150) / > ((mode->clock / 1000) * 8)) - 50; >=20 > So use the similar computation for loop N1 delay. >=20 > Signed-off-by: Jagan Teki *why* are you doing this? What is it fixing? on which devices? Maxime --=20 Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --e76qeq3cbnztemdd Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCW/Jz2wAKCRDj7w1vZxhR xaDJAP4i/bU7ARuwyxeR6o5j7V/Cqzn5B9hG3uEfoPH7UGCvpQEAnNfUq8RCoLIV u3MSC11YJN5XolzUO0Ae2lWI/69uwgw= =TqW6 -----END PGP SIGNATURE----- --e76qeq3cbnztemdd--