From patchwork Mon Nov 14 13:00:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13042308 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id DD0CCC4167B for ; Mon, 14 Nov 2022 13:02:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2F29510E2AD; Mon, 14 Nov 2022 13:01:21 +0000 (UTC) Received: from new4-smtp.messagingengine.com (new4-smtp.messagingengine.com [66.111.4.230]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5809910E293; Mon, 14 Nov 2022 13:00:54 +0000 (UTC) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailnew.nyi.internal (Postfix) with ESMTP id B81A358015F; Mon, 14 Nov 2022 08:00:53 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Mon, 14 Nov 2022 08:00:53 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h=cc :cc:content-transfer-encoding:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to; s=fm2; t=1668430853; x= 1668438053; bh=c5RJi0M8Q1SE//r8kHa3xrGioqqVyBLDq6u+CcpOVQk=; b=O sB816SfgQofkGOWZbvzJ9GYybxr+ZPKmZSWSHnENRKg+utcxHrNcpTsiyBRSWub8 MEtnPEA9lslDypEnRgTNMLNWeDLh73GidPDsEzH8qhFFfODr93yPhEn8v9yPQu7f wxlykI/uQQTFkL3TkdcQnbz3C4Ox19TvhqYUkvoOUyL83L1E4gwjy4VUVN4+ANZ4 nm0JAtsjfc2iVsNY/V8zhfkrPlr5pVQZPGtLqybZWzaStFVJwWQAOZ0CH4n8GR4d CHlssmHsRv1pDpg+eQgY+aMeY8iYQ0fcFBqm8oVHGF1ecrzl1uCBytMTAGAQrgpp 7MBFVIttd8wjbwmW6yiTw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm1; t=1668430853; x= 1668438053; bh=c5RJi0M8Q1SE//r8kHa3xrGioqqVyBLDq6u+CcpOVQk=; b=W XE1Zaj9Nj3RWinIqhJ331TpyNylggfJ8TGCxzQvXXlhW4InlFZY6jRTjHGuVGaOM Hfg/HpCRs0/CuFdZsa+6LAVuRz8lD0mcwJ2gv4wez/0+6r152TXFAFjMkP/G3s39 Jwy31zDTXrMeqP2IjFh0VeeQ+vOtYm6XqjsmRW7qqjxCPSGhl9uIcUGmPV2hHwUv JVlfwFDf5Vi2IrGkOU4nwUSipB9z7kpHunkrEapt4+a7W0F8OptSWpx+uqSeV7ih qTlPonPDzqmLL814nzZSMmXxyPO6TPdwj8Zxukfwr0OhxZrCYJTRkxSG9ixWydOX KTJIfiNzTbi7qcO2jeJbA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvgedrgedvgddvtdcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhfffuggfgtgfkfhgjvfevofesthekredtredtjeenucfhrhhomhepofgrgihi mhgvucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtffrrg htthgvrhhnpedvgfevjefhtdetveevhfelieeuueetgfdvgeevkeegudejffegfffgtedt leelhfenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpe hmrgigihhmvgestggvrhhnohdrthgvtghh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 14 Nov 2022 08:00:51 -0500 (EST) From: Maxime Ripard Date: Mon, 14 Nov 2022 14:00:28 +0100 Subject: [PATCH v9 09/25] drm/modes: Move named modes parsing to a separate function MIME-Version: 1.0 Message-Id: <20220728-rpi-analog-tv-properties-v9-9-24b168e5bcd5@cerno.tech> References: <20220728-rpi-analog-tv-properties-v9-0-24b168e5bcd5@cerno.tech> In-Reply-To: <20220728-rpi-analog-tv-properties-v9-0-24b168e5bcd5@cerno.tech> To: Maxime Ripard , Karol Herbst , Samuel Holland , Joonas Lahtinen , Daniel Vetter , Chen-Yu Tsai , Maarten Lankhorst , Lyude Paul , Thomas Zimmermann , Emma Anholt , Jani Nikula , Rodrigo Vivi , Ben Skeggs , Tvrtko Ursulin , David Airlie , Jernej Skrabec X-Mailer: b4 0.11.0-dev-99e3a X-Developer-Signature: v=1; a=openpgp-sha256; l=3806; i=maxime@cerno.tech; h=from:subject:message-id; bh=gJftk6Nvc/pYwNn1PcqGXwDIYm8zDBtvZRiBH7cMPJw=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDMlF1q8PvxS+1CvMz5k1rWLWzgn/9ot7Xl9d2rS060pD6ss2 842eHaUsDGJcDLJiiiwxwuZL4k7Net3JxjcPZg4rE8gQBi5OAZhIyG+G/zHHFjXcbE6XW6+69vClac eLY6Vcl2iK7th8xkBv82+duTsY/td3duhvOGl4eIrni2nPf9rt7f5oU7H82zo3hf+H5/VY/+YBAA== X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D 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: =?unknown-8bit?q?Dom_Cobley_=3Cdom=40raspberrypi=2Ecom=3E=2C_Dave_Steven?= =?unknown-8bit?q?son_=3Cdave=2Estevenson=40raspberrypi=2Ecom=3E=2C_nouveau?= =?unknown-8bit?q?=40lists=2Efreedesktop=2Eorg=2C_intel-gfx=40lists=2Efreede?= =?unknown-8bit?q?sktop=2Eorg=2C_linux-kernel=40vger=2Ekernel=2Eorg=2C_dri-d?= =?unknown-8bit?q?evel=40lists=2Efreedesktop=2Eorg=2C_Mateusz_Kwiatkowski_?= =?unknown-8bit?q?=3Ckfyatek+publicgit=40gmail=2Ecom=3E=2C_Hans_de_Goede_=3C?= =?unknown-8bit?q?hdegoede=40redhat=2Ecom=3E=2C_Noralf_Tr=C3=B8nnes_=3Cnoral?= =?unknown-8bit?q?f=40tronnes=2Eorg=3E=2C_Geert_Uytterhoeven_=3Cgeert=40linu?= =?unknown-8bit?q?x-m68k=2Eorg=3E=2C_Maxime_Ripard_=3Cmaxime=40cerno=2Etech?= =?unknown-8bit?q?=3E=2C_linux-sunxi=40lists=2Elinux=2Edev=2C_Phil_Elwell_?= =?unknown-8bit?q?=3Cphil=40raspberrypi=2Ecom=3E=2C_linux-arm-kernel=40lists?= =?unknown-8bit?q?=2Einfradead=2Eorg?= Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The current construction of the named mode parsing doesn't allow to extend it easily. Let's move it to a separate function so we can add more parameters and modes. In order for the tests to still pass, some extra checks are needed, so it's not a 1:1 move. Reviewed-by: Noralf Trønnes Tested-by: Mateusz Kwiatkowski Signed-off-by: Maxime Ripard --- Changes in v7: - Add Noralf Reviewed-by Changes in v6: - Simplify the test for connection status extras - Simplify the code path to call drm_mode_parse_cmdline_named_mode Changes in v4: - Fold down all the named mode patches that were split into a single patch again to maintain bisectability --- drivers/gpu/drm/drm_modes.c | 70 +++++++++++++++++++++++++++++++++++++-------- 1 file changed, 58 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 71c050c3ee6b..37542612912b 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -2229,6 +2229,51 @@ static const char * const drm_named_modes_whitelist[] = { "PAL", }; +static int drm_mode_parse_cmdline_named_mode(const char *name, + unsigned int name_end, + struct drm_cmdline_mode *cmdline_mode) +{ + unsigned int i; + + if (!name_end) + return 0; + + /* If the name starts with a digit, it's not a named mode */ + if (isdigit(name[0])) + return 0; + + /* + * If there's an equal sign in the name, the command-line + * contains only an option and no mode. + */ + if (strnchr(name, name_end, '=')) + return 0; + + /* The connection status extras can be set without a mode. */ + if (name_end == 1 && + (name[0] == 'd' || name[0] == 'D' || name[0] == 'e')) + return 0; + + /* + * We're sure we're a named mode at this point, iterate over the + * list of modes we're aware of. + */ + for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { + int ret; + + ret = str_has_prefix(name, drm_named_modes_whitelist[i]); + if (ret != name_end) + continue; + + strcpy(cmdline_mode->name, drm_named_modes_whitelist[i]); + cmdline_mode->specified = true; + + return 1; + } + + return -EINVAL; +} + /** * drm_mode_parse_command_line_for_connector - parse command line modeline for connector * @mode_option: optional per connector mode option @@ -2265,7 +2310,7 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; const char *options_ptr = NULL; char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; - int i, len, ret; + int len, ret; memset(mode, 0, sizeof(*mode)); mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; @@ -2306,18 +2351,19 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, parse_extras = true; } - /* First check for a named mode */ - for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { - ret = str_has_prefix(name, drm_named_modes_whitelist[i]); - if (ret == mode_end) { - if (refresh_ptr) - return false; /* named + refresh is invalid */ + if (!mode_end) + return false; - strcpy(mode->name, drm_named_modes_whitelist[i]); - mode->specified = true; - break; - } - } + ret = drm_mode_parse_cmdline_named_mode(name, mode_end, mode); + if (ret < 0) + return false; + + /* + * Having a mode that starts by a letter (and thus is named) and + * an at-sign (used to specify a refresh rate) is disallowed. + */ + if (ret && refresh_ptr) + return false; /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ if (!mode->specified && isdigit(name[0])) {