From patchwork Wed Jul 20 15:52:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 12924250 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9AA65C433EF for ; Wed, 20 Jul 2022 15:53:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF3E38EC77; Wed, 20 Jul 2022 15:53:14 +0000 (UTC) Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4DBFD8D5BB for ; Wed, 20 Jul 2022 15:53:13 +0000 (UTC) Received: by mail-pj1-x102a.google.com with SMTP id a15so18167328pjs.0 for ; Wed, 20 Jul 2022 08:53:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=WZjdCys1wARNaHGqSCSF1WaRxrhPvglBL2HzzeN8DBY=; b=f9BPhYSsRKAu5C5CWgSOnopXYAxlWSFoYzx3Z/Sboktz59ZhlB20+IjyUmLgJnP4Ie 1obZII1hQGecpTgT+o7l3kc5qdK0WyzyOx9zitLfkIiNrZDHzY20nE6+Qj8HrK3UXGgL ZnUeuLDqbTjPxzclypHTYbGT/Pmx1tJOjhznI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WZjdCys1wARNaHGqSCSF1WaRxrhPvglBL2HzzeN8DBY=; b=s9WAOxoiuFtLaMJmPU3igo4p8UmAtWiOqhSby1g3cCpjyHGZFFYIgRWfBjbK2J6Vm+ 3tBryNqFQGWUi6QXu4zeMexaTkiYEQAnYJE86wxlte9/hnH7IkGUY8OYqR3f2EuHEkir qib3/EsM4zV1qQKfSLuS773Lkau5IOa7s5gOssVN9WH/HIZrwGaClvzBx0oT9oc+ExyB d4m4Sr9f8ZQpWaI/mjvHblXy7mdxJ4a9ITOCR8eHCiND4qJ0CLFvKYMWPQr+65kWU6Kr 7wFwFIxnYqDUaZNPUAbUqsW2BNflrk5btyfhb3nRdTRLBmvqrOJ1CbxOCH3MG4mRwBkc YINA== X-Gm-Message-State: AJIora+40HkIb6U1LC4tiB4TmLSl3wHa7qzDZ5Td2T4D4X0W8E3RCSL6 6anBp98lzH+ZcR3b7GFP9RMUkA== X-Google-Smtp-Source: AGRyM1uJVjan2ZkGWRXvL7eayCwSTD8uXDMJM2c548Wbuu2YYcfaD3HTSqO7wvCrQjAkfjxWvjKjoQ== X-Received: by 2002:a17:902:da8f:b0:16d:1c82:624b with SMTP id j15-20020a170902da8f00b0016d1c82624bmr5257608plx.163.1658332392789; Wed, 20 Jul 2022 08:53:12 -0700 (PDT) Received: from localhost.localdomain ([2405:201:c00a:a073:d177:d5:aee:4f03]) by smtp.gmail.com with ESMTPSA id a8-20020a170902710800b0015e8d4eb1d7sm13919198pll.33.2022.07.20.08.53.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jul 2022 08:53:12 -0700 (PDT) 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 Subject: [PATCH v3 06/13] drm: bridge: samsung-dsim: Add DSI init in bridge pre_enable() Date: Wed, 20 Jul 2022 21:22:03 +0530 Message-Id: <20220720155210.365977-7-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220720155210.365977-1-jagan@amarulasolutions.com> References: <20220720155210.365977-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-samsung-soc@vger.kernel.org, Matteo Lisi , dri-devel@lists.freedesktop.org, NXP Linux Team , linux-amarula , linux-arm-kernel@lists.infradead.org, Jagan Teki Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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. 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 | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 9b74a3f98a17..b07909a52f2d 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1258,6 +1258,9 @@ static int samsung_dsim_init(struct samsung_dsim *dsi) { const struct samsung_dsim_driver_data *driver_data = dsi->driver_data; + if (dsi->state & DSIM_STATE_INITIALIZED) + return 0; + samsung_dsim_reset(dsi); samsung_dsim_enable_irq(dsi); @@ -1270,6 +1273,8 @@ static int samsung_dsim_init(struct samsung_dsim *dsi) samsung_dsim_set_phy_ctrl(dsi); samsung_dsim_init_link(dsi); + dsi->state |= DSIM_STATE_INITIALIZED; + return 0; } @@ -1289,6 +1294,10 @@ static void samsung_dsim_atomic_pre_enable(struct drm_bridge *bridge, } dsi->state |= DSIM_STATE_ENABLED; + + ret = samsung_dsim_init(dsi); + if (ret) + return; } static void samsung_dsim_atomic_enable(struct drm_bridge *bridge, @@ -1464,12 +1473,9 @@ 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); + if (ret) + return ret; ret = mipi_dsi_create_packet(&xfer.packet, msg); if (ret < 0)