From patchwork Thu Jul 14 09:04:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 591042 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01E53CCA480 for ; Thu, 14 Jul 2022 10:39:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237980AbiGNKjB (ORCPT ); Thu, 14 Jul 2022 06:39:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237555AbiGNKjA (ORCPT ); Thu, 14 Jul 2022 06:39:00 -0400 Received: from michel.telenet-ops.be (michel.telenet-ops.be [IPv6:2a02:1800:110:4::f00:18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD98A2B62E for ; Thu, 14 Jul 2022 03:38:58 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by michel.telenet-ops.be with bizsmtp id uyev270084C55Sk06yevaP; Thu, 14 Jul 2022 12:38:56 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1oBvwx-003The-4P; Thu, 14 Jul 2022 12:20:03 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oBulZ-00Bf1L-HR; Thu, 14 Jul 2022 11:04:13 +0200 From: Geert Uytterhoeven To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Hans de Goede Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v2 2/5] drm/modes: Extract drm_mode_parse_cmdline_named_mode() Date: Thu, 14 Jul 2022 11:04:07 +0200 Message-Id: <1371554419ae63cb54c2a377db0c1016fcf200bb.1657788997.git.geert@linux-m68k.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Extract the code to check for a named mode parameter into its own function, to streamline the main parsing flow. Signed-off-by: Geert Uytterhoeven Reviewed-by: Hans de Goede Acked-by: Thomas Zimmermann --- v2: - Add Reviewed-by, Acked-by, - Fix length check. --- drivers/gpu/drm/drm_modes.c | 40 +++++++++++++++++++++++++++---------- 1 file changed, 29 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 67773740c74c9ba0..a3df18fccb31fa77 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1749,6 +1749,29 @@ static const char * const drm_named_modes_whitelist[] = { "PAL", }; +static int drm_mode_parse_cmdline_named_mode(const char *name, + unsigned int length, bool refresh, + struct drm_cmdline_mode *mode) +{ + unsigned int i; + int ret; + + for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { + ret = str_has_prefix(name, drm_named_modes_whitelist[i]); + if (ret != length) + continue; + + if (refresh) + return -EINVAL; /* named + refresh is invalid */ + + strcpy(mode->name, drm_named_modes_whitelist[i]); + mode->specified = true; + return 0; + } + + return 0; +} + /** * drm_mode_parse_command_line_for_connector - parse command line modeline for connector * @mode_option: optional per connector mode option @@ -1785,7 +1808,7 @@ 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; @@ -1823,16 +1846,11 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, } /* First check for a named mode */ - for (i = 0; mode_end && 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 */ - - strcpy(mode->name, drm_named_modes_whitelist[i]); - mode->specified = true; - break; - } + if (mode_end) { + ret = drm_mode_parse_cmdline_named_mode(name, mode_end, + refresh_ptr, mode); + if (ret) + return false; } /* No named mode? Check for a normal mode argument, e.g. 1024x768 */