From patchwork Fri Dec 9 15:23:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 632836 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 EEB34C4332F for ; Fri, 9 Dec 2022 15:27:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230454AbiLIP1d (ORCPT ); Fri, 9 Dec 2022 10:27:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231169AbiLIP1G (ORCPT ); Fri, 9 Dec 2022 10:27:06 -0500 Received: from mail-pj1-x1031.google.com (mail-pj1-x1031.google.com [IPv6:2607:f8b0:4864:20::1031]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE3FB8F0A8 for ; Fri, 9 Dec 2022 07:27:05 -0800 (PST) Received: by mail-pj1-x1031.google.com with SMTP id t17so5148596pjo.3 for ; Fri, 09 Dec 2022 07:27:05 -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=D8mPqEQPN2em8iTEeAt5Sl90+CybIe48O5qmPtt0W8M=; b=XmeybZQm3pTPGYPcvjrGnRGTBkdUVOxBTsXvAOMWMkQQYxNdVwo6zPcoIDahOR0ZlG yqqRApqHHwoyxylzsm08kWfQybEcjDK7/Oj/ETS2GFORmd8IDGwqozEmTz8mRKqO11gN neLl4HdiTexT9aYZ+6Dm0SjpblU7xCEbWjVs8= 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=D8mPqEQPN2em8iTEeAt5Sl90+CybIe48O5qmPtt0W8M=; b=opp1uD98IATFWIbBXf6Fdo1eVd40XBOCK4K3KR1ey+NIDrtIv9XuezbK4RTyKGOkyL xpi37xJPXMxJxgPusVB30heAugml7P6D57381Hq92mR5CFfGEhfzbEYrnO2rT4pKKtBS jdoI9Tg3imol/k+9Fr2dA9Ki9hJzMVlB9ivnU2/SkaGi59hlU9d8uLlqL6Ptw8uz9HNh l1SfqeChtqe9aRM66vb9aRqYxrzKdnqPKDORjvdm6GFuCJDAyhLsLSvRl8jqntbpALZi bFtUvZ96b+f9twd44ePqijfSUATaI8Y8BR/3wWhSIeb3BrjvBvoKnCbyirxZxUnavvIQ cJ5w== X-Gm-Message-State: ANoB5plq05xJtRD51nSab2qOCE8oAY6+dlVso92iv0glD6HZv7eBSNqW E4ih/eRgNLArRmA9jK9hTPXFqA== X-Google-Smtp-Source: AA0mqf76JqBQs9d553vjd8kdTr5hxdTfGn7UBuUCvJ9UY3SyZ6glN8E/72q9iSEsQt37yAV6zCDUug== X-Received: by 2002:a17:902:8c8d:b0:187:262a:7955 with SMTP id t13-20020a1709028c8d00b00187262a7955mr5610383plo.9.1670599625243; Fri, 09 Dec 2022 07:27:05 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a809:6ba1:bbda:c542:ba0b]) by smtp.gmail.com with ESMTPSA id x14-20020a170902ec8e00b00188c5f0f9e9sm1477587plg.199.2022.12.09.07.26.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Dec 2022 07:27:04 -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 09/18] drm: bridge: samsung-dsim: Add host init in pre_enable Date: Fri, 9 Dec 2022 20:53:34 +0530 Message-Id: <20221209152343.180139-10-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 Host transfer() in DSI master will invoke only when the DSI commands are sent from DSI devices like DSI Panel or DSI bridges and this host transfer wouldn't invoke for I2C-based-DSI bridge drivers. Handling DSI host initialization in transfer calls misses the controller setup for I2C configured DSI bridges. This patch adds the DSI initialization from transfer to bridge pre_enable as the bridge pre_enable API is invoked by core as it is common across all classes of DSI device drivers. v9: * added the patch again v3: * none v2: * check initialized state in samsung_dsim_init v1: * keep DSI init in host transfer Signed-off-by: Jagan Teki --- drivers/gpu/drm/bridge/samsung-dsim.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 9adab5d372cc..2e15d753fdd0 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1250,10 +1250,13 @@ static void samsung_dsim_disable_irq(struct samsung_dsim *dsi) disable_irq(dsi->irq); } -static int samsung_dsim_init(struct samsung_dsim *dsi) +static int samsung_dsim_init(struct samsung_dsim *dsi, unsigned int flag) { const struct samsung_dsim_driver_data *driver_data = dsi->driver_data; + if (dsi->state & flag) + return 0; + samsung_dsim_reset(dsi); samsung_dsim_enable_irq(dsi); @@ -1266,6 +1269,8 @@ static int samsung_dsim_init(struct samsung_dsim *dsi) samsung_dsim_set_phy_ctrl(dsi); samsung_dsim_init_link(dsi); + dsi->state |= flag; + return 0; } @@ -1285,6 +1290,10 @@ static void samsung_dsim_atomic_pre_enable(struct drm_bridge *bridge, } dsi->state |= DSIM_STATE_ENABLED; + + ret = samsung_dsim_init(dsi, DSIM_STATE_INITIALIZED); + if (ret) + return; } static void samsung_dsim_atomic_enable(struct drm_bridge *bridge, @@ -1458,12 +1467,9 @@ static ssize_t samsung_dsim_host_transfer(struct mipi_dsi_host *host, if (!(dsi->state & DSIM_STATE_ENABLED)) return -EINVAL; - if (!(dsi->state & DSIM_STATE_INITIALIZED)) { - ret = samsung_dsim_init(dsi); - if (ret) - return ret; - dsi->state |= DSIM_STATE_INITIALIZED; - } + ret = samsung_dsim_init(dsi, DSIM_STATE_INITIALIZED); + if (ret) + return ret; ret = mipi_dsi_create_packet(&xfer.packet, msg); if (ret < 0)