From patchwork Thu Jul 14 09:04:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 590572 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 84FCFCCA483 for ; Thu, 14 Jul 2022 10:39:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238413AbiGNKjN (ORCPT ); Thu, 14 Jul 2022 06:39:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238350AbiGNKjI (ORCPT ); Thu, 14 Jul 2022 06:39:08 -0400 Received: from albert.telenet-ops.be (albert.telenet-ops.be [IPv6:2a02:1800:110:4::f00:1a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2CB249B59 for ; Thu, 14 Jul 2022 03:39:02 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by albert.telenet-ops.be with bizsmtp id uyez2700L4C55Sk06yezsT; Thu, 14 Jul 2022 12:39:01 +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-8p; Thu, 14 Jul 2022 12:20:03 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oBulZ-00Bf1F-Go; 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 1/5] drm/modes: parse_cmdline: Handle empty mode name part Date: Thu, 14 Jul 2022 11:04:06 +0200 Message-Id: <302d0737539daa2053134e8f24fdf37e3d939e1e.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 If no mode name part was specified, mode_end is zero, and the "ret == mode_end" check does the wrong thing. Fix this by skipping all named mode handling when mode_end is zero. Fixes: 7b1cce760afe38b4 ("drm/modes: parse_cmdline: Allow specifying stand-alone options") Signed-off-by: Geert Uytterhoeven Reviewed-by: Hans de Goede Acked-by: Thomas Zimmermann --- v2: - Add Reviewed-by, Acked-by, - Keep "ret == mode_end" check. --- drivers/gpu/drm/drm_modes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 14b746f7ba975954..67773740c74c9ba0 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1823,7 +1823,7 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, } /* First check for a named mode */ - for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { + 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) 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 */ From patchwork Thu Jul 14 09:04:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 590573 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 3072AC43334 for ; Thu, 14 Jul 2022 10:39:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231927AbiGNKjM (ORCPT ); Thu, 14 Jul 2022 06:39:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47842 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237658AbiGNKjC (ORCPT ); Thu, 14 Jul 2022 06:39:02 -0400 Received: from laurent.telenet-ops.be (laurent.telenet-ops.be [IPv6:2a02:1800:110:4::f00:19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2D4129CB1 for ; Thu, 14 Jul 2022 03:39:00 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by laurent.telenet-ops.be with bizsmtp id uyex270084C55Sk01yexDE; Thu, 14 Jul 2022 12:38:58 +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-2S; Thu, 14 Jul 2022 12:20:03 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oBulZ-00Bf1n-I5; 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 3/5] drm/modes: parse_cmdline: Make mode->*specified handling more uniform Date: Thu, 14 Jul 2022 11:04:08 +0200 Message-Id: <3696bcbf95fa1ae98f452c7ea32072642b46caa7.1657788997.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 The various mode->*specified flags are not handled in an uniform way: some flags are set by the corresponding drm_mode_parse_cmdline_*() function, some flags by the caller of the function, and some flags by both. Make this uniform by making this the responsibility of the various parsing helpers, i.e. - Move the setting of mode->specified from caller to callee, - Drop the duplicate setting of mode->bpp_specified and mode->refresh_specified from callers. Signed-off-by: Geert Uytterhoeven Reviewed-by: Hans de Goede Acked-by: Thomas Zimmermann Acked-by: Maxime Ripard --- v2: - Add Reviewed-by, Acked-by. --- drivers/gpu/drm/drm_modes.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index a3df18fccb31fa77..0cbf0467f263b30a 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1599,6 +1599,7 @@ static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, mode->yres = yres; mode->cvt = cvt; mode->rb = rb; + mode->specified = true; return 0; } @@ -1861,8 +1862,6 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, mode); if (ret) return false; - - mode->specified = true; } /* No mode? Check for freestanding extras and/or options */ @@ -1884,8 +1883,6 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); if (ret) return false; - - mode->bpp_specified = true; } if (refresh_ptr) { @@ -1893,8 +1890,6 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, &refresh_end_ptr, mode); if (ret) return false; - - mode->refresh_specified = true; } /* From patchwork Thu Jul 14 09:04:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 590574 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 E352ECCA482 for ; Thu, 14 Jul 2022 10:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231895AbiGNKUM (ORCPT ); Thu, 14 Jul 2022 06:20:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237599AbiGNKUL (ORCPT ); Thu, 14 Jul 2022 06:20:11 -0400 Received: from xavier.telenet-ops.be (xavier.telenet-ops.be [IPv6:2a02:1800:120:4::f00:14]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1BECE2229A for ; Thu, 14 Jul 2022 03:20:07 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by xavier.telenet-ops.be with bizsmtp id uyL32700G4C55Sk01yL3Cw; Thu, 14 Jul 2022 12:20:05 +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-0z; Thu, 14 Jul 2022 12:20:03 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oBulZ-00Bf27-Ik; 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 4/5] drm/modes: Add support for driver-specific named modes Date: Thu, 14 Jul 2022 11:04:09 +0200 Message-Id: <528b126b3d932bff055ff085e598b91e2e690a4e.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 The mode parsing code recognizes named modes only if they are explicitly listed in the internal whitelist, which is currently limited to "NTSC" and "PAL". Provide a mechanism for drivers to override this list to support custom mode names. Ideally, this list should just come from the driver's actual list of modes, but connector->probed_modes is not yet populated at the time of parsing. Signed-off-by: Geert Uytterhoeven Reviewed-by: Hans de Goede --- v2: - Add Reviewed-by. --- drivers/gpu/drm/drm_modes.c | 15 +++++++++++---- include/drm/drm_connector.h | 10 ++++++++++ 2 files changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 0cbf0467f263b30a..bfc3a08614522689 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1748,24 +1748,30 @@ static int drm_mode_parse_cmdline_options(const char *str, static const char * const drm_named_modes_whitelist[] = { "NTSC", "PAL", + NULL }; static int drm_mode_parse_cmdline_named_mode(const char *name, unsigned int length, bool refresh, + const struct drm_connector *connector, struct drm_cmdline_mode *mode) { + const char * const *named_modes_whitelist; 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]); + named_modes_whitelist = connector->named_modes_whitelist ? : + drm_named_modes_whitelist; + + for (i = 0; named_modes_whitelist[i]; i++) { + ret = str_has_prefix(name, named_modes_whitelist[i]); if (ret != length) continue; if (refresh) return -EINVAL; /* named + refresh is invalid */ - strcpy(mode->name, drm_named_modes_whitelist[i]); + strcpy(mode->name, named_modes_whitelist[i]); mode->specified = true; return 0; } @@ -1849,7 +1855,8 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, /* First check for a named mode */ if (mode_end) { ret = drm_mode_parse_cmdline_named_mode(name, mode_end, - refresh_ptr, mode); + refresh_ptr, connector, + mode); if (ret) return false; } diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 3ac4bf87f2571c4c..6361f8a596c01107 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1659,6 +1659,16 @@ struct drm_connector { /** @hdr_sink_metadata: HDR Metadata Information read from sink */ struct hdr_sink_metadata hdr_sink_metadata; + + /** + * @named_modes_whitelist: + * + * Optional NULL-terminated array of names to be considered valid mode + * names. This lets the command line option parser distinguish between + * mode names and freestanding extras and/or options. + * If not set, a set of defaults will be used. + */ + const char * const *named_modes_whitelist; }; #define obj_to_connector(x) container_of(x, struct drm_connector, base) From patchwork Thu Jul 14 09:04:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 591043 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 910DDC43334 for ; Thu, 14 Jul 2022 10:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237857AbiGNKUL (ORCPT ); Thu, 14 Jul 2022 06:20:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231895AbiGNKUK (ORCPT ); Thu, 14 Jul 2022 06:20:10 -0400 Received: from baptiste.telenet-ops.be (baptiste.telenet-ops.be [IPv6:2a02:1800:120:4::f00:13]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13B63220D8 for ; Thu, 14 Jul 2022 03:20:07 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by baptiste.telenet-ops.be with bizsmtp id uyL32700G4C55Sk01yL3gf; Thu, 14 Jul 2022 12:20:05 +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 1oBvww-003The-Ue; Thu, 14 Jul 2022 12:20:02 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oBulZ-00Bf2P-JO; 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 5/5] drm/modes: parse_cmdline: Add support for named modes containing dashes Date: Thu, 14 Jul 2022 11:04:10 +0200 Message-Id: <2eb205da88c3cb19ddf04d167ece4e16a330948b.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 It is fairly common for named video modes to contain dashes (e.g. "tt-mid" on Atari, "dblntsc-ff" on Amiga). Currently such mode names are not recognized, as the dash is considered to be a separator between mode name and bpp. Fix this by skipping any dashes that are not followed immediately by a digit when looking for the separator. Signed-off-by: Geert Uytterhoeven Reviewed-by: Hans de Goede --- v2: - Add Reviewed-by. --- drivers/gpu/drm/drm_modes.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index bfc3a08614522689..c5f490de70314176 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1827,6 +1827,8 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, /* Try to locate the bpp and refresh specifiers, if any */ bpp_ptr = strchr(name, '-'); + while (bpp_ptr && !isdigit(bpp_ptr[1])) + bpp_ptr = strchr(bpp_ptr + 1, '-'); if (bpp_ptr) bpp_off = bpp_ptr - name;