From patchwork Fri Dec 9 15:23:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 13069846 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1F0FC4167B for ; Fri, 9 Dec 2022 15:29:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229759AbiLIP3D (ORCPT ); Fri, 9 Dec 2022 10:29:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229710AbiLIP2m (ORCPT ); Fri, 9 Dec 2022 10:28:42 -0500 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78FAD2935E for ; Fri, 9 Dec 2022 07:28:29 -0800 (PST) Received: by mail-pl1-x634.google.com with SMTP id m4so5229741pls.4 for ; Fri, 09 Dec 2022 07:28:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=m44vPnqg/tFp5+4q15ZzrAAsZWANQlxSVTxmtXu3/9A=; b=EUVyUp9GaIYxpqTpKsJZA/dslfBr1LQitUAbqIQCAmaGpjJ+uCb3d+CQOig4xPRcPc aFC+TX0zNZGmuptvTlgK64AboxxKY5AGoJiETrXiBwSjqibNuz4epAy6S9ePy8OL6lS8 Ojj5+y2GeN5ihsePK5GcNwaRNUE+BrBo9UPmA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=m44vPnqg/tFp5+4q15ZzrAAsZWANQlxSVTxmtXu3/9A=; b=F6A3Qk3RnD3Oxohf/bPiD6ty4fMGeOfzYZJXWrQHyFBL6c6rFqk9S3jN7676255ile sbvP1dikTGUBtvVs71xK3NxMMX5ZbePvLQNobv1162y2H9+riXaDZ+qiMg0nD0B52yAO PSWDkpSyCntbiccEuJbCyBuc0W8svVE8OZpXrlysbQmA2K3mbujdpq0h1X8lofblTIWD BLk5mrvZIGFrZIcdKnLP/7yl87TqbssOU+Et04SwIb1UJXP7JH2YWMoKzDe4BU2BzCsx syvhTamAM2JHntw8pqGvAZNSsmMUWewea8fqscJ/RKVKIAF33ewL2tsNPMK5O+39ZR93 omlg== X-Gm-Message-State: ANoB5pmFPfrRhvLUor9RGI99pp5MVsuGvXiZ0vl6fRtHtBoKDYImyCor dL6888e6nClFtYnln/PHYYxtaw== X-Google-Smtp-Source: AA0mqf6dQt+VkYj1h/ciPSlfHKO+5DZj9mgOoawK+JvVkI95FUXfGcdlpDfODYugKo8sr8nE2IExCw== X-Received: by 2002:a17:902:e892:b0:188:f0da:c25c with SMTP id w18-20020a170902e89200b00188f0dac25cmr9238571plg.14.1670599708957; Fri, 09 Dec 2022 07:28:28 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a809:6ba1:bbda:c542:ba0b]) by smtp.gmail.com with ESMTPSA id x14-20020a170902ec8e00b00188c5f0f9e9sm1477587plg.199.2022.12.09.07.28.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Dec 2022 07:28:28 -0800 (PST) From: Jagan Teki To: Andrzej Hajda , Inki Dae , Marek Szyprowski , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Frieder Schrempf , Fancy Fang , Tim Harvey , Michael Nazzareno Trimarchi , Adam Ford , Neil Armstrong , Robert Foss , Laurent Pinchart , Tommaso Merciai , Marek Vasut Cc: Matteo Lisi , dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, NXP Linux Team , linux-amarula , Jagan Teki Subject: [PATCH v9 14/18] drm: bridge: samsung-dsim: Add input_bus_flags Date: Fri, 9 Dec 2022 20:53:39 +0530 Message-Id: <20221209152343.180139-15-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221209152343.180139-1-jagan@amarulasolutions.com> References: <20221209152343.180139-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org LCDIF-DSIM glue logic inverts the HS/VS/DE signals and expecting the i.MX8M Mini/Nano DSI host to add additional Data Enable signal active low (DE_LOW). This makes the valid data transfer on each horizontal line. So, add additional bus flags DE_LOW setting via input_bus_flags for i.MX8M Mini/Nano platforms. v9: * none v8: * add DE_LOW for i.MX8M Mini/Nano platforms. v7, v6: * none v5: * rebased based on updated bridge changes v4, v3, v2, v1: * none Signed-off-by: Jagan Teki --- drivers/gpu/drm/bridge/samsung-dsim.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index ef0d802d25bf..4de1294f29b3 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1654,6 +1654,10 @@ static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = { .unregister_host = samsung_dsim_unregister_host, }; +static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_low = { + .input_bus_flags = DRM_BUS_FLAG_DE_LOW, +}; + int samsung_dsim_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1736,6 +1740,10 @@ int samsung_dsim_probe(struct platform_device *pdev) dsi->bridge.of_node = dev->of_node; dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; + /* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */ + if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM) + dsi->bridge.timings = &samsung_dsim_bridge_timings_de_low; + if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host) ret = dsi->plat_data->host_ops->register_host(dsi);