From patchwork Sat Jun 22 03:41:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Derek Basehore X-Patchwork-Id: 11011213 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DCDC11395 for ; Sat, 22 Jun 2019 03:43:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD94228B7D for ; Sat, 22 Jun 2019 03:43:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C0EC228BA8; Sat, 22 Jun 2019 03:43:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6CA3228B7D for ; Sat, 22 Jun 2019 03:43:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tvAfmeC9cRWh6jBgKBf1RtODXCyK2MIXXkPQYhamCEg=; b=tbVh9cec9Z8KCV ssCnHfIDoNs02EI5KGVtm6btcRricfPyYi8LNTDa3hX0u7R2N4t85fY7JPzVPu6Un+3/RjIS33GMX 0Ap7Tq50aWM5dxGwsxXaUk0Pja9IIRZ7KyhXFHg7iBeiFqOY9a8vsOLba9RF0hoXZV0hUqTeJ71/L rMnVXkCKea4JJmrgwBAtkDzToytnA0+M5yTIjpneK947Jv0f5srzSNfiUHLWmiKZP9u8XYfD6dnQt 0MPlU/xmEPEOodryLRRxl2nD2pF3L19bWaWhrp+FTyFuU1a74Qff8r2fIuDzim6nb5ANRn5GoQW55 BDshUbWPUkrGHX8sf0Ng==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1heWvO-00038P-2c; Sat, 22 Jun 2019 03:42:46 +0000 Received: from mail-pl1-x642.google.com ([2607:f8b0:4864:20::642]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1heWtv-0001lI-9J for linux-arm-kernel@lists.infradead.org; Sat, 22 Jun 2019 03:41:22 +0000 Received: by mail-pl1-x642.google.com with SMTP id p1so3907301plo.2 for ; Fri, 21 Jun 2019 20:41:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=VR+1gVBeNp5zLQOTjis3BU5nyFYrQmMm0AGMlO4tl+8=; b=Hz1UANN1roomVyU9jl8Q45f5XfmMGxREC6DBubcmkHxA8N1aR36jWxl686CM4zFQL/ 7MiFPw3h+X4133oN0+Q3yDg/27rL+fCVzFuuMjiJdEJ0QbnbArUJNJK5+nHiqylNnq3C XXbpjYWXPs4o9kfi5BLzH73e3K1SmGKI8+SCU= 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=VR+1gVBeNp5zLQOTjis3BU5nyFYrQmMm0AGMlO4tl+8=; b=HuA/eil08W1CryDCYpJ1VU9Bzh/Kf2Oao935jtTnxmY3ZlLo9Cxox/26hGp3qCDNDr Z2doRAHMx//yhHkhs+P10Z/rBtaEEjax5kEO3M1ymAWHYdwLtMbureW1F5Nnu/pTogEn +3QwnHi0nqfNf7xOgU7eY6i9VIkS0GpDp/PwcYscGTZOq40V8k6WXc81HqAQ0BoioyqW h71qMxj2tf/GEdGUhrFZUMnW08t69PKoW5n/2+MbUofujl0gLa1goTr9zKtJHYaPi7NJ dBGraiksllmVYhKTeScPIVC0NW7jP6dzIOi4yZekVZfgY14U8Yd04BtCJBhH7C2wYKWL J7yA== X-Gm-Message-State: APjAAAVct4uOQde1sYZDDO9EYZRaYx6PP6zkVo/xcKcszH3g/gy8vbvS SL2BRCh/Vt9+kRKP+zY0yBBskA== X-Google-Smtp-Source: APXvYqy7OZlNIJV/wKk0qzH/BBdfdv3svSddCMNCO3q2GvadO7lmbf1GC5jUG+WPh26RLzF0aYG8KQ== X-Received: by 2002:a17:902:e58b:: with SMTP id cl11mr113259716plb.24.1561174872149; Fri, 21 Jun 2019 20:41:12 -0700 (PDT) Received: from exogeni.mtv.corp.google.com ([2620:15c:202:1:5be8:f2a6:fd7b:7459]) by smtp.gmail.com with ESMTPSA id u128sm4756688pfu.26.2019.06.21.20.41.11 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 21 Jun 2019 20:41:11 -0700 (PDT) From: Derek Basehore To: linux-kernel@vger.kernel.org Subject: [PATCH v3 1/4] drm/panel: Add helper for reading DT rotation Date: Fri, 21 Jun 2019 20:41:02 -0700 Message-Id: <20190622034105.188454-2-dbasehore@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190622034105.188454-1-dbasehore@chromium.org> References: <20190622034105.188454-1-dbasehore@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190621_204115_685377_C18075F7 X-CRM114-Status: GOOD ( 14.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Derek Basehore , Philipp Zabel , Maxime Ripard , Sam Ravnborg , intel-gfx@lists.freedesktop.org, Joonas Lahtinen , Maarten Lankhorst , Jani Nikula , David Airlie , Thierry Reding , Matthias Brugger , dri-devel@lists.freedesktop.org, Daniel Vetter , Rodrigo Vivi , CK Hu , linux-mediatek@lists.infradead.org, Sean Paul , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds a helper function for reading the rotation (panel orientation) from the device tree. Signed-off-by: Derek Basehore --- drivers/gpu/drm/drm_panel.c | 42 +++++++++++++++++++++++++++++++++++++ include/drm/drm_panel.h | 7 +++++++ 2 files changed, 49 insertions(+) diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index dbd5b873e8f2..507099af4b57 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -172,6 +172,48 @@ struct drm_panel *of_drm_find_panel(const struct device_node *np) return ERR_PTR(-EPROBE_DEFER); } EXPORT_SYMBOL(of_drm_find_panel); + +/** + * of_drm_get_panel_orientation - look up the rotation of the panel using a + * device tree node + * @np: device tree node of the panel + * @orientation: orientation enum to be filled in + * + * Looks up the rotation of a panel in the device tree. The rotation in the + * device tree is counter clockwise. + * + * Return: 0 when a valid rotation value (0, 90, 180, or 270) is read or the + * rotation property doesn't exist. -EERROR otherwise. + */ +int of_drm_get_panel_orientation(const struct device_node *np, + enum drm_panel_orientation *orientation) +{ + int rotation, ret; + + ret = of_property_read_u32(np, "rotation", &rotation); + if (ret == -EINVAL) { + /* Don't return an error if there's no rotation property. */ + *orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; + return 0; + } + + if (ret < 0) + return ret; + + if (rotation == 0) + *orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; + else if (rotation == 90) + *orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; + else if (rotation == 180) + *orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; + else if (rotation == 270) + *orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; + else + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL(of_drm_get_panel_orientation); #endif MODULE_AUTHOR("Thierry Reding "); diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index 8c738c0e6e9f..3564952f1a4f 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -197,11 +197,18 @@ int drm_panel_detach(struct drm_panel *panel); #if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL) struct drm_panel *of_drm_find_panel(const struct device_node *np); +int of_drm_get_panel_orientation(const struct device_node *np, + enum drm_panel_orientation *orientation); #else static inline struct drm_panel *of_drm_find_panel(const struct device_node *np) { return ERR_PTR(-ENODEV); } +int of_drm_get_panel_orientation(const struct device_node *np, + enum drm_panel_orientation *orientation) +{ + return -ENODEV; +} #endif #endif