From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5955EC43470 for ; Fri, 30 Apr 2021 10:58:56 +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 022A861466 for ; Fri, 30 Apr 2021 10:58:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 022A861466 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de 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 C9C146E1BE; Fri, 30 Apr 2021 10:58:51 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id DA3116E25A for ; Fri, 30 Apr 2021 10:58:47 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 6CAABB28F; Fri, 30 Apr 2021 10:58:46 +0000 (UTC) From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, mripard@kernel.org, kraxel@redhat.com, corbet@lwn.net, lgirdwood@gmail.com, broonie@kernel.org, sam@ravnborg.org, robh@kernel.org, emil.l.velikov@gmail.com, geert+renesas@glider.be, hdegoede@redhat.com, bluescreen_avenger@verizon.net, gregkh@linuxfoundation.org Subject: [PATCH v5 6/9] drm/simpledrm: Initialize framebuffer data from device-tree node Date: Fri, 30 Apr 2021 12:58:37 +0200 Message-Id: <20210430105840.30515-7-tzimmermann@suse.de> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210430105840.30515-1-tzimmermann@suse.de> References: <20210430105840.30515-1-tzimmermann@suse.de> 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: Maxime Ripard , virtualization@lists.linux-foundation.org, Thomas Zimmermann , dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" A firmware framebuffer might also be specified via device-tree files. If no device platform data is given, try the DT device node. v2: * add Device Tree match table * clean-up parser wrappers Signed-off-by: Thomas Zimmermann Acked-by: Maxime Ripard Tested-by: nerdopolis --- drivers/gpu/drm/tiny/simpledrm.c | 89 ++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 64e8a8581d9a..53d6bec7d0b2 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -114,6 +114,74 @@ simplefb_get_format_pd(struct drm_device *dev, return simplefb_get_validated_format(dev, pd->format); } +static int +simplefb_read_u32_of(struct drm_device *dev, struct device_node *of_node, + const char *name, u32 *value) +{ + int ret = of_property_read_u32(of_node, name, value); + + if (ret) + drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n", + name, ret); + return ret; +} + +static int +simplefb_read_string_of(struct drm_device *dev, struct device_node *of_node, + const char *name, const char **value) +{ + int ret = of_property_read_string(of_node, name, value); + + if (ret) + drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n", + name, ret); + return ret; +} + +static int +simplefb_get_width_of(struct drm_device *dev, struct device_node *of_node) +{ + u32 width; + int ret = simplefb_read_u32_of(dev, of_node, "width", &width); + + if (ret) + return ret; + return simplefb_get_validated_int0(dev, "width", width); +} + +static int +simplefb_get_height_of(struct drm_device *dev, struct device_node *of_node) +{ + u32 height; + int ret = simplefb_read_u32_of(dev, of_node, "height", &height); + + if (ret) + return ret; + return simplefb_get_validated_int0(dev, "height", height); +} + +static int +simplefb_get_stride_of(struct drm_device *dev, struct device_node *of_node) +{ + u32 stride; + int ret = simplefb_read_u32_of(dev, of_node, "stride", &stride); + + if (ret) + return ret; + return simplefb_get_validated_int(dev, "stride", stride); +} + +static const struct drm_format_info * +simplefb_get_format_of(struct drm_device *dev, struct device_node *of_node) +{ + const char *format; + int ret = simplefb_read_string_of(dev, of_node, "format", &format); + + if (ret) + return ERR_PTR(ret); + return simplefb_get_validated_format(dev, format); +} + /* * Simple Framebuffer device */ @@ -166,6 +234,7 @@ static int simpledrm_device_init_fb(struct simpledrm_device *sdev) struct drm_device *dev = &sdev->dev; struct platform_device *pdev = sdev->pdev; const struct simplefb_platform_data *pd = dev_get_platdata(&pdev->dev); + struct device_node *of_node = pdev->dev.of_node; if (pd) { width = simplefb_get_width_pd(dev, pd); @@ -180,6 +249,19 @@ static int simpledrm_device_init_fb(struct simpledrm_device *sdev) format = simplefb_get_format_pd(dev, pd); if (IS_ERR(format)) return PTR_ERR(format); + } else if (of_node) { + width = simplefb_get_width_of(dev, of_node); + if (width < 0) + return width; + height = simplefb_get_height_of(dev, of_node); + if (height < 0) + return height; + stride = simplefb_get_stride_of(dev, of_node); + if (stride < 0) + return stride; + format = simplefb_get_format_of(dev, of_node); + if (IS_ERR(format)) + return PTR_ERR(format); } else { drm_err(dev, "no simplefb configuration found\n"); return -ENODEV; @@ -534,9 +616,16 @@ static int simpledrm_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id simpledrm_of_match_table[] = { + { .compatible = "simple-framebuffer", }, + { }, +}; +MODULE_DEVICE_TABLE(of, simpledrm_of_match_table); + static struct platform_driver simpledrm_platform_driver = { .driver = { .name = "simple-framebuffer", /* connect to sysfb */ + .of_match_table = simpledrm_of_match_table, }, .probe = simpledrm_probe, .remove = simpledrm_remove, -- 2.31.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel