From patchwork Tue May 26 01:15:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 11569741 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A67681752 for ; Tue, 26 May 2020 01:15:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9042520706 for ; Tue, 26 May 2020 01:15:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="kWOUn7sk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387888AbgEZBPw (ORCPT ); Mon, 25 May 2020 21:15:52 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:54362 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388402AbgEZBPv (ORCPT ); Mon, 25 May 2020 21:15:51 -0400 Received: from pendragon.bb.dnainternet.fi (81-175-216-236.bb.dnainternet.fi [81.175.216.236]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 6A4421C77; Tue, 26 May 2020 03:15:47 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1590455747; bh=A3wvAQ1/fmCJ/WxNEpmFu/Z515r4c8m3BRuPMd5cR18=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kWOUn7skoGDq5C9dnqJ4p527+8N61Y7Njym/nblesEuwTGiwp8T+2/IJqf3HdOrvO JNMur+bL8tUo+zQQ0Yfba673nziwnEPI+vIgSZg1zr0FFQbBcVQxVHRoLXAli9rbsY t9lQOPWUbmb8ox3Dy9fkWWxcy/L96/+/klyp9Fd0= From: Laurent Pinchart To: dri-devel@lists.freedesktop.org Cc: linux-renesas-soc@vger.kernel.org, Andrzej Hajda , Jernej Skrabec , Jonas Karlman , Neil Armstrong , Sam Ravnborg , Kieran Bingham Subject: [PATCH 23/27] drm: bridge: dw-hdmi: Attach to next bridge if available Date: Tue, 26 May 2020 04:15:01 +0300 Message-Id: <20200526011505.31884-24-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200526011505.31884-1-laurent.pinchart+renesas@ideasonboard.com> References: <20200526011505.31884-1-laurent.pinchart+renesas@ideasonboard.com> MIME-Version: 1.0 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org On all platforms except i.MX and Rockchip, the dw-hdmi DT bindings require a video output port connected to an HDMI sink (most likely an HDMI connector, in rare cases another bridges converting HDMI to another protocol). For those platforms, retrieve the next bridge and attach it from the dw-hdmi bridge attach handler. Signed-off-by: Laurent Pinchart Reviewed-by: Neil Armstrong --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 52 ++++++++++++++++++++++- include/drm/bridge/dw_hdmi.h | 2 + 2 files changed, 53 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index 6148a022569a..512e67bb1c32 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -143,6 +143,7 @@ struct dw_hdmi_phy_data { struct dw_hdmi { struct drm_connector connector; struct drm_bridge bridge; + struct drm_bridge *next_bridge; unsigned int version; @@ -2797,7 +2798,8 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge, struct dw_hdmi *hdmi = bridge->driver_private; if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) - return 0; + return drm_bridge_attach(bridge->encoder, hdmi->next_bridge, + bridge, flags); return dw_hdmi_connector_create(hdmi); } @@ -3179,6 +3181,50 @@ static void dw_hdmi_init_hw(struct dw_hdmi *hdmi) hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data); } +static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi) +{ + struct device_node *endpoint; + struct device_node *remote; + + if (!hdmi->plat_data->output_port) + return 0; + + endpoint = of_graph_get_endpoint_by_regs(hdmi->dev->of_node, + hdmi->plat_data->output_port, + -1); + if (!endpoint) { + /* + * Don't treat this as a fatal error as the Rockchip DW-HDMI + * binding doesn't make the output port mandatory. + */ + dev_dbg(hdmi->dev, "Missing endpoint in port@%u\n", + hdmi->plat_data->output_port); + return 0; + } + + remote = of_graph_get_remote_port_parent(endpoint); + of_node_put(endpoint); + if (!remote) { + dev_err(hdmi->dev, "Endpoint in port@%u unconnected\n", + hdmi->plat_data->output_port); + return -ENODEV; + } + + if (!of_device_is_available(remote)) { + dev_err(hdmi->dev, "port@%u remote device is disabled\n", + hdmi->plat_data->output_port); + of_node_put(remote); + return -ENODEV; + } + + hdmi->next_bridge = of_drm_find_bridge(remote); + of_node_put(remote); + if (!hdmi->next_bridge) + return -EPROBE_DEFER; + + return 0; +} + static struct dw_hdmi * __dw_hdmi_probe(struct platform_device *pdev, const struct dw_hdmi_plat_data *plat_data) @@ -3216,6 +3262,10 @@ __dw_hdmi_probe(struct platform_device *pdev, mutex_init(&hdmi->cec_notifier_mutex); spin_lock_init(&hdmi->audio_lock); + ret = dw_hdmi_parse_dt(hdmi); + if (ret < 0) + return ERR_PTR(ret); + ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0); if (ddc_node) { hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node); diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index ea34ca146b82..8ebeb65d6371 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -126,6 +126,8 @@ struct dw_hdmi_phy_ops { struct dw_hdmi_plat_data { struct regmap *regm; + unsigned int output_port; + unsigned long input_bus_encoding; bool use_drm_infoframe; bool ycbcr_420_allowed;