From patchwork Wed Oct 26 15:33:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13020793 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 76127FA373E for ; Wed, 26 Oct 2022 15:35:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2CDFD10E50B; Wed, 26 Oct 2022 15:34:11 +0000 (UTC) Received: from new4-smtp.messagingengine.com (new4-smtp.messagingengine.com [66.111.4.230]) by gabe.freedesktop.org (Postfix) with ESMTPS id 782A510E33F; Wed, 26 Oct 2022 15:33:49 +0000 (UTC) Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id D5EA5580391; Wed, 26 Oct 2022 11:33:48 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Wed, 26 Oct 2022 11:33:48 -0400 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=fm3; t=1666798428; x= 1666805628; bh=AzjQD+27iFybW2XxMLzmHNkTgkXQr6tgJryuAJobNU8=; b=m H/NGITpDHSzobXhqeBmgyBMre7N0VqAKwYGxqknEO8BWpG33vojj74ISf0UQpqAw bddf1GTuyfbMQ9xdcnz+qAHV5kd7xeGlKR2gM6L5wVtuH1IAQn4Kvu0Z81SKUWsg oexZLbZbO9O7fKPINW9mNlVNH7rmW973i0CV1NtpAyQagBNLvwGF1HxeEg3+FJ8O GuVeE7ejA0HMMptdMhq7bZwz0HYbrHx8ZteT0smxUOd/wr2LKRAiQ05kbgFKs1d9 rApROl9demDgHuqzJx5nCMMKcR/TkAVKbjlSvynfb4hLw58z8YH9obJuIUyWTf/i Be4h4DERfeQptzAMgdp0A== 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=fm3; t=1666798428; x= 1666805628; bh=AzjQD+27iFybW2XxMLzmHNkTgkXQr6tgJryuAJobNU8=; b=Y u//MUMim6KsuVkbiOCX2pPPa10HV3sxDzMwS6uFtZM0cZJlzUV9fL6UPfTbq02BS P3kAEvnX+6iqYC2lNhEp0um3BpxuyKgAP/Iit1ogRVcrruyg+wRNm+euqf9XKFZ5 LgOCxKDSxp9E5Dpsj/uu87Ae4+OwzovyREDn9ZkVja+5V8QO3+cfjdLmlAV2bGen VK6MTBNFar5h3LQDsf2IZqr9FDp03fup58k5Alxf/J3QuyGxTcv/RNawq2E1qBIT n3KcnPEzTGJeTM0CuMl+V7dx28v57e1W4NY24q61iE1/FaBlLDoWeDhXaL4RV1Oa CAAQzATzQdg7jggd+A1uQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvgedrtddvgdeludcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhfffugggtgffkfhgjvfevofesthekredtredtjeenucfhrhhomhepmhgrgihi mhgvsegtvghrnhhordhtvggthhenucggtffrrghtthgvrhhnpeefudfhgeevhefhfedtue evueeluddutdetuddtvddvgeekheelvefhteekteeihfenucevlhhushhtvghrufhiiigv pedunecurfgrrhgrmhepmhgrihhlfhhrohhmpehmrgigihhmvgestggvrhhnohdrthgvtg hh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 26 Oct 2022 11:33:48 -0400 (EDT) From: maxime@cerno.tech Date: Wed, 26 Oct 2022 17:33:27 +0200 Subject: [PATCH v6 08/23] drm/modes: Move named modes parsing to a separate function MIME-Version: 1.0 Message-Id: <20220728-rpi-analog-tv-properties-v6-8-e7792734108f@cerno.tech> References: <20220728-rpi-analog-tv-properties-v6-0-e7792734108f@cerno.tech> In-Reply-To: <20220728-rpi-analog-tv-properties-v6-0-e7792734108f@cerno.tech> To: Karol Herbst , Emma Anholt , Ben Skeggs , Chen-Yu Tsai , Rodrigo Vivi , Maarten Lankhorst , Jani Nikula , Daniel Vetter , Thomas Zimmermann , Tvrtko Ursulin , Samuel Holland , Jernej Skrabec , David Airlie , Maxime Ripard , Joonas Lahtinen , Lyude Paul X-Mailer: b4 0.11.0-dev-99e3a X-Developer-Signature: v=1; a=openpgp-sha256; l=3649; i=maxime@cerno.tech; h=from:subject:message-id; bh=L8E11yDG8xDlOq4bDAkcnN86+ZzmzsUoFIrf654tiVE=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDMmRwW4Szx4+/8Du88xN6ui+eVuv5c6eEqFdfDro/RZbY2W9 5SUsHaUsDGJcDLJiiiwxwuZL4k7Net3JxjcPZg4rE8gQBi5OAZjIuRkM/z3PrdzE+VC2V8ymxIbHgP XIxpnf7plMmn/3yNREudXssQEM/+sZlVg+6S5/obk4cL7/oujpUz/ovVTmKvZ48z710E5PZxYA 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_linux-sunxi=40lists=2E?= =?unknown-8bit?q?linux=2Edev=2C_Hans_de_Goede_=3Chdegoede=40redhat=2Ecom=3E?= =?unknown-8bit?q?=2C_Noralf_Tr=C3=B8nnes_=3Cnoralf=40tronnes=2Eorg=3E=2C_Ge?= =?unknown-8bit?q?ert_Uytterhoeven_=3Cgeert=40linux-m68k=2Eorg=3E=2C_Maxime_?= =?unknown-8bit?q?Ripard_=3Cmaxime=40cerno=2Etech=3E=2C_Mateusz_Kwiatkowski_?= =?unknown-8bit?q?=3Ckfyatek+publicgit=40gmail=2Ecom=3E=2C_Phil_Elwell_=3Cph?= =?unknown-8bit?q?il=40raspberrypi=2Ecom=3E=2C_linux-arm-kernel=40lists=2Ein?= =?unknown-8bit?q?fradead=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. Signed-off-by: Maxime Ripard Reviewed-by: Noralf Trønnes --- 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])) {