From patchwork Thu Jan 26 14:44:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 13117288 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 D563AC61DA2 for ; Thu, 26 Jan 2023 14:46:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1BFA510E91F; Thu, 26 Jan 2023 14:46:19 +0000 (UTC) Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by gabe.freedesktop.org (Postfix) with ESMTPS id EAE9610E91F for ; Thu, 26 Jan 2023 14:46:16 +0000 (UTC) Received: by mail-pj1-x1034.google.com with SMTP id m11so1751046pji.0 for ; Thu, 26 Jan 2023 06:46:16 -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=aUy6DNNvAiPX9eeWAOGTVXrnTQlr6Vuyr0HCYZSKb9Q=; b=dh6luB/qRaLS7gvu5TpqMAIr02u7Fjrfvnmrw61ngdnlECseug3s5QUtEDdLjizuC0 FR+VfCiuQG+SHFWpLtMBwHLvHmZLywc/Zc8GS0L6eCzYSU++s9wUmAGReJ1aKkq0YfoP CDKO3pyqimC1wU/0d/D2WFtaPGq2g9h8Atm/Y= 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=aUy6DNNvAiPX9eeWAOGTVXrnTQlr6Vuyr0HCYZSKb9Q=; b=0pLpPEPSddY79w1kjVsslDvRtsIkVHWfkOpgRg0FzyYBhOaOH/GyT+cueBXIEpKNKc 6LODyqSC9Aho6K0fWXagD3yAG0GbEEqwHQpHg4PwivctDbjC6AkBUQCKdkW+bMSD1wmw c0QAJ5K0o/lbHDn+0wIaDVxZaOylrgsZJh1RxUOgr4vbQYL/rGZa6t/2LD1OoyGLChnW XYO5ZLtXzLdPoeg0Mieq71LYLoYn/V14D3nBdkQspsgmTzzPVISVay662i36ZxTIAX2q DUmOY6T1qp83dJ4YwqD1pBICBp3We9d1lUsBtWh3twvyzvYYwlz2/tfukYDmBufVFARK 3dFg== X-Gm-Message-State: AO0yUKXvX3JTTMGwBqqY5lFVCd2sJP6fv6oUOBj97Be2k5M77TknU4SP MWOzo77R9ovXafRRJZQLkeLZUQ== X-Google-Smtp-Source: AK7set/oBf1SiZHL0FSQHPOMS+OpOG2xNWQFQDQZQLMBlGqjs1UhUpN0TR0TN+Cn8irMMp6MRI/yGA== X-Received: by 2002:a05:6a20:a89c:b0:bb:b945:4865 with SMTP id ca28-20020a056a20a89c00b000bbb9454865mr6751320pzb.8.1674744376555; Thu, 26 Jan 2023 06:46:16 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a238:3cb1:2156:ef87:8af5]) by smtp.gmail.com with ESMTPSA id d197-20020a6336ce000000b0042988a04bfdsm823660pga.9.2023.01.26.06.46.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Jan 2023 06:46:15 -0800 (PST) From: Jagan Teki To: Andrzej Hajda , Inki Dae , Marek Szyprowski , Seung-Woo Kim , Kyungmin Park , Frieder Schrempf , Tim Harvey , Adam Ford , Robert Foss , Laurent Pinchart , Marek Vasut Subject: [PATCH v12 08/18] drm: exynos: dsi: Handle proper host initialization Date: Thu, 26 Jan 2023 20:14:17 +0530 Message-Id: <20230126144427.607098-9-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230126144427.607098-1-jagan@amarulasolutions.com> References: <20230126144427.607098-1-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" 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: Marek Vasut Reviewed-by: Frieder Schrempf Signed-off-by: Marek Szyprowski Signed-off-by: Jagan Teki --- Changes for v12: - collect RB from Marek 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)