From patchwork Mon Mar 22 14:01:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 12154855 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFB40C433DB for ; Mon, 22 Mar 2021 14:02:27 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 89B0F6197F for ; Mon, 22 Mar 2021 14:02:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89B0F6197F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0F26189DBD; Mon, 22 Mar 2021 14:02:27 +0000 (UTC) Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by gabe.freedesktop.org (Postfix) with ESMTPS id C107889DBD for ; Mon, 22 Mar 2021 14:02:26 +0000 (UTC) Received: by mail-pg1-x533.google.com with SMTP id v2so8676285pgk.11 for ; Mon, 22 Mar 2021 07:02:26 -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=tNbrx86DmSZYrQGPtYW/NrYWvp0JiJ6t7g8UyTa2yps=; b=Idm1TRUwyS7zoyZ0x5Jvarukc5YvesuKKpp07dpHvp2f6ETWIWw1+hJgNs8cqOkYVN MTQHCYi83l/IIH2ga0WYbDvz+orKOal6INF2WsCpg1YiA9/HixP5tg2gWFUPQuoqEfwG 14G5gC0WAkIz7nZeQsvBsWWUpzlDe54IsKw40= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=tNbrx86DmSZYrQGPtYW/NrYWvp0JiJ6t7g8UyTa2yps=; b=m1JbNQXS+qzp41HPj784IKQwsjU4Ph754c56R+lRVfxATHVpt2DeW49ssgxAbn7log ky5zKF9rsS0IyglHHfPwopr4Sscu7o+Y/+bw6aFbAtgG7FdTV0c/6lljrgqlbJMVuELE wvK5ewTJfhtsLX59egEbw3Z7xcI63AnKReetno6IDHCkZ6RQRtIY3aeLEdsoAUt4gMtr xB2hGAGgH39Ns1QshnGKalUtlRMgirgrP2OhMtsBAM5KDVE8k5vkK/2tqyGc1eHkVZG5 HYq3dJYXWpIkVkhms2JnqZ8BCCL0kmGSAegFl9OzvTP1fHel8cD6CNqb8g9RZPCecngx a18g== X-Gm-Message-State: AOAM531h3+9CQJ9orE6gXTJ6X9onBWzXerpQ0NOl9xa972Q1bq9OrtJ1 3ZoClDQS5Z/D8vsVrgPlH+0U4Q== X-Google-Smtp-Source: ABdhPJymBCVrrkdCj22Ow4zPjS5VbcwN1e3vMrGoJ7v1KJtcbO5PMqdgf77gob6DFaR3v/wQx6YRaw== X-Received: by 2002:a63:5044:: with SMTP id q4mr22407823pgl.178.1616421746216; Mon, 22 Mar 2021 07:02:26 -0700 (PDT) Received: from localhost.localdomain ([2405:201:c00a:a884:15c1:9a30:414f:d84b]) by smtp.gmail.com with ESMTPSA id gg22sm14112997pjb.20.2021.03.22.07.02.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Mar 2021 07:02:25 -0700 (PDT) From: Jagan Teki To: Maxime Ripard , Chen-Yu Tsai , Jernej Skrabec , Laurent Pinchart , Samuel Holland Subject: [PATCH v4 2/4] drm: sun4i: dsi: Add bridge support Date: Mon, 22 Mar 2021 19:31:50 +0530 Message-Id: <20210322140152.101709-3-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210322140152.101709-1-jagan@amarulasolutions.com> References: <20210322140152.101709-1-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-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-sunxi@googlegroups.com, Jagan Teki , linux-amarula@amarulasolutions.com, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Some display panels would come up with a non-DSI output which can have an option to connect DSI interface by means of bridge converter. This DSI to non-DSI bridge converter would require a bridge driver that would communicate the DSI controller for bridge functionalities. So, add support for bridge functionalities in Allwinner DSI controller. Cc: Samuel Holland Signed-off-by: Jagan Teki --- Note: Samuel Holland, The existing kms hotplug dropped in order to attach the bridge properly. However, I did try several ways to support hotplug with the bridge but it's resulting in a deadlock where bind never attach bridge until bridge pointer found and bridge pointer cannot found until bind finishes. Any inputs on this would be appreciated. Changes for v4: - none Changes for v3: - updated with new API's drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 34 +++++++++++++++++--------- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 2 +- 2 files changed, 23 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 2e9e7b2d4145..39321299dc27 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -773,6 +773,9 @@ static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) if (dsi->panel) drm_panel_prepare(dsi->panel); + if (dsi->panel_bridge) + dsi->panel_bridge->funcs->pre_enable(dsi->panel_bridge); + /* * FIXME: This should be moved after the switch to HS mode. * @@ -788,6 +791,9 @@ static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) if (dsi->panel) drm_panel_enable(dsi->panel); + if (dsi->panel_bridge) + dsi->panel_bridge->funcs->enable(dsi->panel_bridge); + sun6i_dsi_start(dsi, DSI_START_HSC); udelay(1000); @@ -804,6 +810,9 @@ static void sun6i_dsi_encoder_disable(struct drm_encoder *encoder) if (dsi->panel) { drm_panel_disable(dsi->panel); drm_panel_unprepare(dsi->panel); + } else if (dsi->panel_bridge) { + dsi->panel_bridge->funcs->disable(dsi->panel_bridge); + dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge); } phy_power_off(dsi->dphy); @@ -964,23 +973,17 @@ static int sun6i_dsi_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); - struct drm_panel *panel; int ret; ret = drm_of_find_panel_or_bridge(dsi->dev->of_node, 0, 0, - &panel, NULL); + &dsi->panel, &dsi->panel_bridge); if (ret) return ret; - if (!dsi->drm || !dsi->drm->registered) - return -EPROBE_DEFER; - - dsi->panel = panel; dsi->device = device; - drm_kms_helper_hotplug_event(dsi->drm); - - dev_info(host->dev, "Attached device %s\n", device->name); + dev_info(host->dev, "Attached %s %s\n", + device->name, dsi->panel ? "panel" : "bridge"); return 0; } @@ -991,9 +994,10 @@ static int sun6i_dsi_detach(struct mipi_dsi_host *host, struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); dsi->panel = NULL; + dsi->panel_bridge = NULL; dsi->device = NULL; - drm_kms_helper_hotplug_event(dsi->drm); + drm_of_panel_bridge_remove(dsi->dev->of_node, 0, 0); return 0; } @@ -1082,7 +1086,13 @@ static int sun6i_dsi_bind(struct device *dev, struct device *master, drm_connector_attach_encoder(&dsi->connector, &dsi->encoder); - dsi->drm = drm; + if (dsi->panel_bridge) { + ret = drm_bridge_attach(&dsi->encoder, dsi->panel_bridge, NULL, 0); + if (ret) { + dev_err(dsi->dev, "Couldn't attach drm bridge\n"); + goto err_cleanup_connector; + } + } return 0; @@ -1096,7 +1106,7 @@ static void sun6i_dsi_unbind(struct device *dev, struct device *master, { struct sun6i_dsi *dsi = dev_get_drvdata(dev); - dsi->drm = NULL; + drm_encoder_cleanup(&dsi->encoder); } static const struct component_ops sun6i_dsi_ops = { diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h index c863900ae3b4..370ecb356a63 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h @@ -29,8 +29,8 @@ struct sun6i_dsi { struct device *dev; struct mipi_dsi_device *device; - struct drm_device *drm; struct drm_panel *panel; + struct drm_bridge *panel_bridge; }; static inline struct sun6i_dsi *host_to_sun6i_dsi(struct mipi_dsi_host *host)