From patchwork Wed Dec 14 12:58:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 634109 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 64804C001B2 for ; Wed, 14 Dec 2022 13:01:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238493AbiLNNBD (ORCPT ); Wed, 14 Dec 2022 08:01:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238496AbiLNNAk (ORCPT ); Wed, 14 Dec 2022 08:00:40 -0500 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3974B1E3CF for ; Wed, 14 Dec 2022 05:00:29 -0800 (PST) Received: by mail-pj1-x102c.google.com with SMTP id hd14-20020a17090b458e00b0021909875bccso3684286pjb.1 for ; Wed, 14 Dec 2022 05:00:29 -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=reAzV85TkTxD1WK0rGG72gcOzphutndqWeG8pF/PWes=; b=HTPrpriNi43M0tAYQw0K5Nhukn3g6rLc229936jxO7KwviJtf2DwN+wNbgn68IynOZ ty2M4PVqAjYGtCpnVhHdSMG6qx8y8/2OiqrBpRPPxz7Fry9/k0J323OX+akB2V7fkikM OOSHSz8F/tKPO2XMi9IjhhyShXwApQ36WqL5c= 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=reAzV85TkTxD1WK0rGG72gcOzphutndqWeG8pF/PWes=; b=cRmgAzwosmyaq58FhSkOH5kZZMbtiKvjCZyHwXxvgBq6jgZMGe2w8FGIOfpTLKxbXG SmRKbn4fAR8Gw2F84sJFi3/Lny409vf8R3xX/1SKbH9dibBvCPT+Vyht3CPEMelzUNKr qCshALEATM7bC/BoBlEVtXWYiOvflKfAHvxjqtNB74OHR5W3CZqvwsoN0G3osUk1SRLE IK7xnQy7g5ZRuhGFKyV/tPllUXYSo2WRs17y3OS0ZUOaNQjFJbZRcIiIQebjcFSQtXT8 RaL9yNLMxdVzr7F1rxHhtWmrF08RZM9bBrdxRbp4P3ZjOJIDBkJf6iRfsG9SZzllCTvC n1Lw== X-Gm-Message-State: ANoB5pk/E9HLlOVmvlipn5D1Lb7kBwAd3JqXPfvGTKhlbFYFu3vNiln+ M+h4l/IYiwAh0FqCgeomaUBBjA== X-Google-Smtp-Source: AA0mqf6SgKd8ofd//fxvH6v++cm8mxZjxhlZI05RzL0BM/RTpHIxqly1BfZ9U6mz0ZpANIInOLwf2Q== X-Received: by 2002:a17:903:3043:b0:189:bf92:ec8c with SMTP id u3-20020a170903304300b00189bf92ec8cmr22486241pla.7.1671022828579; Wed, 14 Dec 2022 05:00:28 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a809:5e03:faf:846e:352d]) by smtp.gmail.com with ESMTPSA id ix17-20020a170902f81100b001895f7c8a71sm1838651plb.97.2022.12.14.05.00.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Dec 2022 05:00:27 -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: [PATCH v10 08/18] drm: exynos: dsi: Handle proper host initialization Date: Wed, 14 Dec 2022 18:28:57 +0530 Message-Id: <20221214125907.376148-9-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221214125907.376148-1-jagan@amarulasolutions.com> References: <20221214125907.376148-1-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. Signed-off-by: Jagan Teki Signed-off-by: Marek Szyprowski Reviewed-by: Frieder Schrempf --- 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 fdaf514b39f2..5792f9883cee 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, @@ -1344,6 +1347,9 @@ 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); @@ -1356,6 +1362,8 @@ 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; } @@ -1411,6 +1419,16 @@ 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, @@ -1557,12 +1575,9 @@ 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)