From patchwork Mon Jan 23 15:12:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 13112372 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 7203AC38142 for ; Mon, 23 Jan 2023 15:14:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232437AbjAWPOB (ORCPT ); Mon, 23 Jan 2023 10:14:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232380AbjAWPNn (ORCPT ); Mon, 23 Jan 2023 10:13:43 -0500 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0AE7129405 for ; Mon, 23 Jan 2023 07:13:28 -0800 (PST) Received: by mail-pj1-x102a.google.com with SMTP id dw9so11926647pjb.5 for ; Mon, 23 Jan 2023 07:13:28 -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=ye7rK8XP7CKFg3FA4ZUZc/27br4/mG8uE4vofYp7eK4=; b=GTAGiMWTkM+UiZZwCH2uvGr9uNUQaH1ulTDGalDgijsQMk47GyiRtugz59uYlnXlcJ iIM3soHB+uYblDR3yaM2voJIIHs0uk9ymghTpKyaWsQ02D6o8kumc7BvqtguUGsLAYoE 1PEIzxQ+fhQoJaI3kJJiaEt7Fzf42mKkCJlj4= 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=ye7rK8XP7CKFg3FA4ZUZc/27br4/mG8uE4vofYp7eK4=; b=3nLk2Y9VxTYS9bRES03Zumdfa6tvGKZMx6zMVpxiFea3Qfip8Gm7iFEeTjNEWM2jLw WoZKh9kfGdh9UBIlWmTHxkOJYsMaSE37piNQk13LsT3RlFomUW3JSJGYZ+wQWlwGgION ID8uKJYBEB3Mt0qW1KVtxVbACQi/5ut5ymSl61jsB0ciyJ0mn1UDf1t7D5K5AkI9Ui4S /GOfb+v5CLTkauns8s0KIRwc+qiZZTtkf9/7aemoqquTjLQpgELipisuWD0kf2Koxyah 70fqN3byKevsmPBx7kKlX4D9LtTqEOpqtYfNct/oI/0dm0c9DYN2o7btVDhn5zRlZpo4 w5tQ== X-Gm-Message-State: AFqh2kqek8vIkHdk0ODwi8BYIENgJRZotPfU1UmLvgW0m9vXEtt21A42 ouZ/5K4Vnxd0iGuD+HKoHP+B8A== X-Google-Smtp-Source: AMrXdXs8DTjFKb2OWtb66z2sea0wlZNVlzC1mqLlF08ZXPfpn4bUQBpuonL5dGy7dq1e/7wxDD8URQ== X-Received: by 2002:a17:903:11c7:b0:194:58c7:ab79 with SMTP id q7-20020a17090311c700b0019458c7ab79mr32632612plh.63.1674486807702; Mon, 23 Jan 2023 07:13:27 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a15f:2279:f361:f93b:7971]) by smtp.gmail.com with ESMTPSA id d5-20020a170903230500b001754fa42065sm19207111plh.143.2023.01.23.07.13.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jan 2023 07:13:27 -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: [RESEND PATCH v11 08/18] drm: exynos: dsi: Handle proper host initialization Date: Mon, 23 Jan 2023 20:42:02 +0530 Message-Id: <20230123151212.269082-9-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230123151212.269082-1-jagan@amarulasolutions.com> References: <20230123151212.269082-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org From: Marek Szyprowski Host transfer() in the DSI master will invoke only when the DSI commands are sent from DSI devices like DSI Panel or DSI bridges and this host the 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 updates the DSI host initialization by calling host to init from bridge pre_enable as the bridge pre_enable API is invoked by core as it is common across all classes of DSI device drivers. The host init during pre_enable is conditional and not invoked for Exynos as existing downstream drm panels and bridges in Exynos are expecting the host initialization during DSI transfer. Reviewed-by: Frieder Schrempf Signed-off-by: Marek Szyprowski Signed-off-by: Jagan Teki Reviewed-by: Marek Vasut --- Changes for v11: - collect RB from Frieder Changes for v10: - update the to simple logic to handle all platforms Changs for v9 - v8: - none Changes for v2: - check initialized state in samsung_dsim_init Changes for v1: - keep DSI init in host transfer drivers/gpu/drm/exynos/exynos_drm_dsi.c | 27 +++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 902bd46964cb..d4a976d86f08 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -254,6 +254,9 @@ struct exynos_dsi_transfer { #define DSIM_STATE_CMD_LPM BIT(2) #define DSIM_STATE_VIDOUT_AVAILABLE BIT(3) +#define exynos_dsi_hw_is_exynos(hw) \ + ((hw) >= DSIM_TYPE_EXYNOS3250 && (hw) <= DSIM_TYPE_EXYNOS5433) + enum exynos_dsi_type { DSIM_TYPE_EXYNOS3250, DSIM_TYPE_EXYNOS4210, @@ -1343,6 +1346,9 @@ static int exynos_dsi_init(struct exynos_dsi *dsi) { const struct exynos_dsi_driver_data *driver_data = dsi->driver_data; + if (dsi->state & DSIM_STATE_INITIALIZED) + return 0; + exynos_dsi_reset(dsi); exynos_dsi_enable_irq(dsi); @@ -1355,6 +1361,8 @@ static int exynos_dsi_init(struct exynos_dsi *dsi) exynos_dsi_set_phy_ctrl(dsi); exynos_dsi_init_link(dsi); + dsi->state |= DSIM_STATE_INITIALIZED; + return 0; } @@ -1410,6 +1418,16 @@ static void exynos_dsi_atomic_pre_enable(struct drm_bridge *bridge, } dsi->state |= DSIM_STATE_ENABLED; + + /* + * For Exynos-DSIM the downstream bridge, or panel are expecting + * the host initialization during DSI transfer. + */ + if (!exynos_dsi_hw_is_exynos(dsi->plat_data->hw_type)) { + ret = exynos_dsi_init(dsi); + if (ret) + return; + } } static void exynos_dsi_atomic_enable(struct drm_bridge *bridge, @@ -1556,12 +1574,9 @@ static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host, if (!(dsi->state & DSIM_STATE_ENABLED)) return -EINVAL; - if (!(dsi->state & DSIM_STATE_INITIALIZED)) { - ret = exynos_dsi_init(dsi); - if (ret) - return ret; - dsi->state |= DSIM_STATE_INITIALIZED; - } + ret = exynos_dsi_init(dsi); + if (ret) + return ret; ret = mipi_dsi_create_packet(&xfer.packet, msg); if (ret < 0)