From patchwork Thu Oct 21 07:39:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 12574177 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 876BDC433FE for ; Thu, 21 Oct 2021 07:42:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F9F060EFE for ; Thu, 21 Oct 2021 07:42:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231978AbhJUHoi (ORCPT ); Thu, 21 Oct 2021 03:44:38 -0400 Received: from wnew3-smtp.messagingengine.com ([64.147.123.17]:44643 "EHLO wnew3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232013AbhJUHnm (ORCPT ); Thu, 21 Oct 2021 03:43:42 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailnew.west.internal (Postfix) with ESMTP id 3FDAE2B0046A; Thu, 21 Oct 2021 03:41:25 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute4.internal (MEProxy); Thu, 21 Oct 2021 03:41:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm1; bh=3aQjtC+OIX1dD SUs4abOhDu7UcQuzLgRDPAEOeXSI5o=; b=XmjkmpdKYLBYTdvxEy78AkuiGSYiA 146qEjXfHcrB3u+hM/kxxcPR6+L+EKwrFfWNXTDK7jiP8nvM7TrxAV+DdJTtGAgt jHkgiDXq5ANdBK3eHQaCghZLB/RFEj4lM8WSv8SCOvz7a06Fl5wmaY/k0o8NfE+3 c/TF6gb4JprZjWjlo3oB3A0DEucNz6TMW8I/dTn72IQEPKNKduDk72DG6eOUuOoO poFf3z2L694G0c7XjQmsd84csbstbhHiSavaJ4S/Zv1PquM2nKnjCjaCJ+1tdVIX M7Cfe3t83oF/0iq+pVTw7Zfc+jYFHi3AV+aiy1+V2MxzTHfafkxoavB5A== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=3aQjtC+OIX1dDSUs4abOhDu7UcQuzLgRDPAEOeXSI5o=; b=kwO5iryX GO9W54hNqi2TgLB/eMj3vG8fbe2X6+Q8KTYgOp3Kgf7ZnNAmoXMSPChYjiNxNiNs H7BAqmt+kgszPN8BqhaXl0BAX7tqxU0AcBqCZV7nUNbUK8YBCSifSUTa3NMrfgbO 1PuqNkm7pD6SC/Ji1kH7Sd74C0Sfo0ebNBXzr3CHIgEeWrJRtGi/OnfsAycDEXpH MCaZAh8Ue6LH4oZwsHhlbJtHtYQZOh5wNRoeynayiZdzpRfvDx9J2x5MbpZ77+ch 3+96yrtEa/lx8uX19efqqe+yhAgW5iqTMbcnGeuKebVdO2zXccwwZzSS/OkHrziu oN33cIwV+U48mw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrvddvhedgudduiecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefhvffufffkofgjfhgggfestdekredtredttdenucfhrhhomhepofgrgihi mhgvucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtffrrg htthgvrhhnpedvkeelveefffekjefhffeuleetleefudeifeehuddugffghffhffehveev heehvdenucevlhhushhtvghrufhiiigvpeegnecurfgrrhgrmhepmhgrihhlfhhrohhmpe hmrgigihhmvgestggvrhhnohdrthgvtghh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 21 Oct 2021 03:41:24 -0400 (EDT) From: Maxime Ripard To: Laurent Pinchart , Maarten Lankhorst , Thomas Zimmermann , Maxime Ripard , Sam Ravnborg , Daniel Vetter , David Airlie , Thierry Reding , Andrzej Hajda , Robert Foss , Neil Armstrong , Jonas Karlman , Jernej Skrabec Cc: Seung-Woo Kim , Xinliang Liu , linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Tian Tao , freedreno@lists.freedesktop.org, Chen Feng , Joonyoung Shim , Kyungmin Park , John Stultz , Rob Clark , linux-arm-msm@vger.kernel.org, Sean Paul , Inki Dae , Xinwei Kong , dri-devel@lists.freedesktop.org Subject: [PATCH v5 20/21] drm/kirin: dsi: Adjust probe order Date: Thu, 21 Oct 2021 09:39:46 +0200 Message-Id: <20211021073947.499373-21-maxime@cerno.tech> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211021073947.499373-1-maxime@cerno.tech> References: <20211021073947.499373-1-maxime@cerno.tech> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Without proper care and an agreement between how DSI hosts and devices drivers register their MIPI-DSI entities and potential components, we can end up in a situation where the drivers can never probe. Most drivers were taking evasive maneuvers to try to workaround this, but not all of them were following the same conventions, resulting in various incompatibilities between DSI hosts and devices. Now that we have a sequence agreed upon and documented, let's convert kirin to it. Tested-by: John Stultz Signed-off-by: Maxime Ripard --- drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 52 +++++++++++++------- 1 file changed, 33 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c index 952cfdb1961d..1d556482bb46 100644 --- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c +++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c @@ -81,7 +81,7 @@ struct dsi_hw_ctx { struct dw_dsi { struct drm_encoder encoder; - struct drm_bridge *bridge; + struct device *dev; struct mipi_dsi_host host; struct drm_display_mode cur_mode; struct dsi_hw_ctx *ctx; @@ -720,10 +720,13 @@ static int dw_drm_encoder_init(struct device *dev, return 0; } +static const struct component_ops dsi_ops; static int dsi_host_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *mdsi) { struct dw_dsi *dsi = host_to_dsi(host); + struct device *dev = host->dev; + int ret; if (mdsi->lanes < 1 || mdsi->lanes > 4) { DRM_ERROR("dsi device params invalid\n"); @@ -734,13 +737,20 @@ static int dsi_host_attach(struct mipi_dsi_host *host, dsi->format = mdsi->format; dsi->mode_flags = mdsi->mode_flags; + ret = component_add(dev, &dsi_ops); + if (ret) + return ret; + return 0; } static int dsi_host_detach(struct mipi_dsi_host *host, struct mipi_dsi_device *mdsi) { - /* do nothing */ + struct device *dev = host->dev; + + component_del(dev, &dsi_ops); + return 0; } @@ -768,7 +778,17 @@ static int dsi_host_init(struct device *dev, struct dw_dsi *dsi) static int dsi_bridge_init(struct drm_device *dev, struct dw_dsi *dsi) { struct drm_encoder *encoder = &dsi->encoder; - struct drm_bridge *bridge = dsi->bridge; + struct drm_bridge *bridge; + struct device_node *np = dsi->dev->of_node; + int ret; + + /* + * Get the endpoint node. In our case, dsi has one output port1 + * to which the external HDMI bridge is connected. + */ + ret = drm_of_find_panel_or_bridge(np, 1, 0, NULL, &bridge); + if (ret) + return ret; /* associate the bridge to dsi encoder */ return drm_bridge_attach(encoder, bridge, NULL, 0); @@ -785,10 +805,6 @@ static int dsi_bind(struct device *dev, struct device *master, void *data) if (ret) return ret; - ret = dsi_host_init(dev, dsi); - if (ret) - return ret; - ret = dsi_bridge_init(drm_dev, dsi); if (ret) return ret; @@ -809,17 +825,7 @@ static const struct component_ops dsi_ops = { static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi) { struct dsi_hw_ctx *ctx = dsi->ctx; - struct device_node *np = pdev->dev.of_node; struct resource *res; - int ret; - - /* - * Get the endpoint node. In our case, dsi has one output port1 - * to which the external HDMI bridge is connected. - */ - ret = drm_of_find_panel_or_bridge(np, 1, 0, NULL, &dsi->bridge); - if (ret) - return ret; ctx->pclk = devm_clk_get(&pdev->dev, "pclk"); if (IS_ERR(ctx->pclk)) { @@ -852,6 +858,7 @@ static int dsi_probe(struct platform_device *pdev) dsi = &data->dsi; ctx = &data->ctx; dsi->ctx = ctx; + dsi->dev = &pdev->dev; ret = dsi_parse_dt(pdev, dsi); if (ret) @@ -859,12 +866,19 @@ static int dsi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); - return component_add(&pdev->dev, &dsi_ops); + ret = dsi_host_init(&pdev->dev, dsi); + if (ret) + return ret; + + return 0; } static int dsi_remove(struct platform_device *pdev) { - component_del(&pdev->dev, &dsi_ops); + struct dsi_data *data = platform_get_drvdata(pdev); + struct dw_dsi *dsi = &data->dsi; + + mipi_dsi_host_unregister(&dsi->host); return 0; }