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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 6E1E8C072B5 for ; Fri, 24 May 2019 11:19:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C94121773 for ; Fri, 24 May 2019 11:19:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390982AbfEXLTl (ORCPT ); Fri, 24 May 2019 07:19:41 -0400 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:60747 "EHLO relay6-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390743AbfEXLTl (ORCPT ); Fri, 24 May 2019 07:19:41 -0400 X-Originating-IP: 90.88.147.134 Received: from localhost (aaubervilliers-681-1-27-134.w90-88.abo.wanadoo.fr [90.88.147.134]) (Authenticated sender: maxime.ripard@bootlin.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 71F01C0006; Fri, 24 May 2019 11:19:29 +0000 (UTC) Date: Fri, 24 May 2019 13:19:28 +0200 From: Maxime Ripard To: Jagan Teki Cc: Andrzej Hajda , Laurent Pinchart , Chen-Yu Tsai , David Airlie , Daniel Vetter , Rob Herring , Mark Rutland , Michael Trimarchi , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, linux-amarula@amarulasolutions.com Subject: Re: [PATCH v2 3/6] drm/sun4i: dsi: Add bridge support Message-ID: <20190524111928.ourdmraxw7vrhaar@flea> References: <20190524104317.20287-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190524104317.20287-1-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 Hi, On Fri, May 24, 2019 at 04:13:14PM +0530, Jagan Teki wrote: > Some display panels would come up with a non-DSI output which > can have an option to connect DSI interface by means of bridge > converter. > > This DSI to non-DSI bridge converter would require a bridge > driver that would communicate the DSI controller for bridge > functionalities. > > So, add support for bridge functionalities in Allwinner DSI > controller. > > Signed-off-by: Jagan Teki > --- > drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 60 +++++++++++++++++++------- > drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 1 + > 2 files changed, 45 insertions(+), 16 deletions(-) > > diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > index ae2fe31b05b1..2b4b1355a88f 100644 > --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > @@ -775,6 +775,9 @@ static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) > if (!IS_ERR(dsi->panel)) > drm_panel_prepare(dsi->panel); > > + if (!IS_ERR(dsi->bridge)) > + drm_bridge_pre_enable(dsi->bridge); > + drm_panel_bridge provides what's needed to deal with both a panel and a bridge, I guess it would make sense to use this instead of duplicating everything. Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com