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=-9.8 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_GIT 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 D19B8C433FF for ; Fri, 2 Aug 2019 07:35:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A7B5320665 for ; Fri, 2 Aug 2019 07:35:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389877AbfHBHfB (ORCPT ); Fri, 2 Aug 2019 03:35:01 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:17475 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2389759AbfHBHe7 (ORCPT ); Fri, 2 Aug 2019 03:34:59 -0400 X-IronPort-AV: E=Sophos;i="5.64,337,1559487600"; d="scan'208";a="23151164" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 02 Aug 2019 16:34:58 +0900 Received: from fabrizio-dev.ree.adwin.renesas.com (unknown [10.226.36.196]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 72C0840078B4; Fri, 2 Aug 2019 16:34:55 +0900 (JST) From: Fabrizio Castro To: Laurent Pinchart , Kieran Bingham , Jacopo Mondi , David Airlie , Daniel Vetter Cc: Fabrizio Castro , dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Geert Uytterhoeven , Chris Paterson , Biju Das Subject: [PATCH/RFC 05/12] drm: rcar-du: lvds: Add data swap support Date: Fri, 2 Aug 2019 08:34:02 +0100 Message-Id: <1564731249-22671-6-git-send-email-fabrizio.castro@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1564731249-22671-1-git-send-email-fabrizio.castro@bp.renesas.com> References: <1564731249-22671-1-git-send-email-fabrizio.castro@bp.renesas.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When in vertical stripe mode of operation, there is the option of swapping even data and odd data on the two LVDS interfaces used to drive the video output. Add data swap support by exposing a new DT property named "renesas,swap-data". Signed-off-by: Fabrizio Castro --- drivers/gpu/drm/rcar-du/rcar_lvds.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c index 3aeaf9e..c306fab 100644 --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c @@ -69,6 +69,7 @@ struct rcar_lvds { struct drm_bridge *companion; bool dual_link; + bool stripe_swap_data; }; #define bridge_to_rcar_lvds(bridge) \ @@ -439,12 +440,16 @@ static void rcar_lvds_enable(struct drm_bridge *bridge) rcar_lvds_write(lvds, LVDCHCR, lvdhcr); if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) { - /* - * Configure vertical stripe based on the mode of operation of - * the connected device. - */ - rcar_lvds_write(lvds, LVDSTRIPE, - lvds->dual_link ? LVDSTRIPE_ST_ON : 0); + u32 lvdstripe = 0; + + if (lvds->dual_link) + /* + * Configure vertical stripe based on the mode of + * operation of the connected device. + */ + lvdstripe = LVDSTRIPE_ST_ON | (lvds->stripe_swap_data ? + LVDSTRIPE_ST_SWAP : 0); + rcar_lvds_write(lvds, LVDSTRIPE, lvdstripe); } /* @@ -770,8 +775,12 @@ static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) } } - if (lvds->dual_link) + if (lvds->dual_link) { + lvds->stripe_swap_data = of_property_read_bool( + lvds->dev->of_node, + "renesas,swap-data"); ret = rcar_lvds_parse_dt_companion(lvds); + } done: of_node_put(local_output); -- 2.7.4