From patchwork Mon Oct 19 12:39:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 11844317 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=-12.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 DFC01C433E7 for ; Mon, 19 Oct 2020 12:39:42 +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 776DA21D81 for ; Mon, 19 Oct 2020 12:39:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ti.com header.i=@ti.com header.b="e89qMVWR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 776DA21D81 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.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 E14F86E95F; Mon, 19 Oct 2020 12:39:40 +0000 (UTC) Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) by gabe.freedesktop.org (Postfix) with ESMTPS id 546116E95F for ; Mon, 19 Oct 2020 12:39:39 +0000 (UTC) Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 09JCdXJo017303; Mon, 19 Oct 2020 07:39:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1603111173; bh=arKDrdf8UEKjyd63cRuI2E1qsiNW35jQzibdyvfghWU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=e89qMVWRX0PzvN/2SQR/aV7SlbsaInBJ2CTITkmLVBXcdPFDqPRkbFk/1xHoPIE03 AuAaaMxuotwjDDtjNZ1hts6m0iTwybIfxM6rT4FTUxlIOx6E09VhQp6qDaObSnGAmS WwDHz6WBICw/wAqFuosV/D55Mq6J/uQDayLC/i5A= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 09JCdXfd015231 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 19 Oct 2020 07:39:33 -0500 Received: from DFLE115.ent.ti.com (10.64.6.36) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Mon, 19 Oct 2020 07:39:32 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Mon, 19 Oct 2020 07:39:32 -0500 Received: from deskari.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 09JCdP8X060195; Mon, 19 Oct 2020 07:39:30 -0500 From: Tomi Valkeinen To: , Rob Herring , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Laurent Pinchart , Andrzej Hajda , Neil Armstrong Subject: [PATCH v3 2/2] drm/bridge: display-connector: add DP support Date: Mon, 19 Oct 2020 15:39:04 +0300 Message-ID: <20201019123904.259146-3-tomi.valkeinen@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201019123904.259146-1-tomi.valkeinen@ti.com> References: <20201019123904.259146-1-tomi.valkeinen@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 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: David Airlie , Tomi Valkeinen , Swapnil Kashinath Jakhade Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add DP support to display-connector driver. The driver will support HPD via a GPIO and DP PWR. DP PWR will be enabled at probe, which is not optimal, but I'm not sure what would be a good place to enable and disable DP PWR. Perhaps attach/detach, but I don't know if enabling HW is something that attach is supposed to do. In any case, I don't think there's much difference in power consumption between the version in this patch and enabling the regulator later: if the driver probes, supposedly it will attach very soon afterwards, and we need to enable the DP PWR as soon as possible. Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/bridge/display-connector.c | 46 +++++++++++++++++++++- 1 file changed, 44 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c index 4d278573cdb9..04362feccd75 100644 --- a/drivers/gpu/drm/bridge/display-connector.c +++ b/drivers/gpu/drm/bridge/display-connector.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include @@ -20,6 +21,8 @@ struct display_connector { struct gpio_desc *hpd_gpio; int hpd_irq; + + struct regulator *dp_pwr; }; static inline struct display_connector * @@ -172,11 +175,12 @@ static int display_connector_probe(struct platform_device *pdev) of_property_read_string(pdev->dev.of_node, "label", &label); /* - * Get the HPD GPIO for DVI and HDMI connectors. If the GPIO can provide + * Get the HPD GPIO for DVI, HDMI and DP connectors. If the GPIO can provide * edge interrupts, register an interrupt handler. */ if (type == DRM_MODE_CONNECTOR_DVII || - type == DRM_MODE_CONNECTOR_HDMIA) { + type == DRM_MODE_CONNECTOR_HDMIA || + type == DRM_MODE_CONNECTOR_DisplayPort) { conn->hpd_gpio = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); if (IS_ERR(conn->hpd_gpio)) { @@ -223,6 +227,38 @@ static int display_connector_probe(struct platform_device *pdev) } } + /* Get the DP PWR for DP connector */ + if (type == DRM_MODE_CONNECTOR_DisplayPort) { + int r; + + conn->dp_pwr = devm_regulator_get_optional(&pdev->dev, "dp-pwr"); + + if (IS_ERR(conn->dp_pwr)) { + r = PTR_ERR(conn->dp_pwr); + + switch (r) { + case -ENODEV: + conn->dp_pwr = NULL; + break; + + case -EPROBE_DEFER: + return -EPROBE_DEFER; + + default: + dev_err(&pdev->dev, "failed to get DP PWR regulator: %d\n", r); + return r; + } + } + + if (conn->dp_pwr) { + r = regulator_enable(conn->dp_pwr); + if (r) { + dev_err(&pdev->dev, "failed to enable DP PWR regulator: %d\n", r); + return r; + } + } + } + conn->bridge.funcs = &display_connector_bridge_funcs; conn->bridge.of_node = pdev->dev.of_node; @@ -251,6 +287,9 @@ static int display_connector_remove(struct platform_device *pdev) { struct display_connector *conn = platform_get_drvdata(pdev); + if (conn->dp_pwr) + regulator_disable(conn->dp_pwr); + drm_bridge_remove(&conn->bridge); if (!IS_ERR(conn->bridge.ddc)) @@ -275,6 +314,9 @@ static const struct of_device_id display_connector_match[] = { }, { .compatible = "vga-connector", .data = (void *)DRM_MODE_CONNECTOR_VGA, + }, { + .compatible = "dp-connector", + .data = (void *)DRM_MODE_CONNECTOR_DisplayPort, }, {}, };