From patchwork Fri Nov 25 20:31:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 13056249 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 74169C4708B for ; Fri, 25 Nov 2022 20:31:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229583AbiKYUbS (ORCPT ); Fri, 25 Nov 2022 15:31:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229975AbiKYUbQ (ORCPT ); Fri, 25 Nov 2022 15:31:16 -0500 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 B6A3B419AD for ; Fri, 25 Nov 2022 12:31:11 -0800 (PST) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed10:d898:271f:7512:e47f]) by albert.telenet-ops.be with bizsmtp id okX62800E4su47u06kX6PU; Fri, 25 Nov 2022 21:31:08 +0100 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 1oyfLj-001aQ8-Se; Fri, 25 Nov 2022 21:31:03 +0100 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oyfLj-003Kx4-Fq; Fri, 25 Nov 2022 21:31:03 +0100 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 v3 2/2] drm/modes: Add support for driver-specific named modes Date: Fri, 25 Nov 2022 21:31:01 +0100 Message-Id: <577fd80ce4b98a5517564eccf7b4dceaf823c545.1669405382.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 named mode list, which is currently limited to "NTSC" and "PAL". Provide a mechanism for drivers to override this list to support custom modes. 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 --- I don't expect this patch to be acceptable as-is, but it's a dependency for posting the RFC Atari DRM driver. v3: - Update for the switch from names to named mode descriptors, v2: - Add Reviewed-by. --- drivers/gpu/drm/drm_modes.c | 19 ++++++++----------- include/drm/drm_connector.h | 18 ++++++++++++++++++ 2 files changed, 26 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 45b9e6aab766002a..9ea928b35e728d13 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1751,14 +1751,6 @@ static int drm_mode_parse_cmdline_options(const char *str, return 0; } -struct drm_named_mode { - const char *name; - unsigned int pixel_clock_khz; - unsigned int xres; - unsigned int yres; - unsigned int flags; -}; - #define NAMED_MODE(_name, _pclk, _x, _y, _flags) \ { \ .name = _name, \ @@ -1771,12 +1763,15 @@ struct drm_named_mode { static const struct drm_named_mode drm_named_modes[] = { NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE), NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE), + { /* sentinel */ } }; static int drm_mode_parse_cmdline_named_mode(const char *name, unsigned int name_end, + const struct drm_connector *connector, struct drm_cmdline_mode *cmdline_mode) { + const struct drm_named_mode *named_modes; unsigned int i; if (!name_end) @@ -1802,8 +1797,9 @@ static int drm_mode_parse_cmdline_named_mode(const char *name, * 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); i++) { - const struct drm_named_mode *mode = &drm_named_modes[i]; + named_modes = connector->named_modes ? : drm_named_modes; + for (i = 0; named_modes[i].name; i++) { + const struct drm_named_mode *mode = &named_modes[i]; int ret; ret = str_has_prefix(name, mode->name); @@ -1903,7 +1899,8 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, if (!mode_end) return false; - ret = drm_mode_parse_cmdline_named_mode(name, mode_end, mode); + ret = drm_mode_parse_cmdline_named_mode(name, mode_end, connector, + mode); if (ret < 0) return false; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 565cf9d3c550926f..ff78ac214e475086 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1315,6 +1315,14 @@ struct drm_cmdline_mode { struct drm_connector_tv_margins tv_margins; }; +struct drm_named_mode { + const char *name; + unsigned int pixel_clock_khz; + unsigned int xres; + unsigned int yres; + unsigned int flags; +}; + /** * struct drm_connector - central DRM connector control structure * @@ -1708,6 +1716,16 @@ struct drm_connector { /** @hdr_sink_metadata: HDR Metadata Information read from sink */ struct hdr_sink_metadata hdr_sink_metadata; + + /** + * @named_modes: + * + * 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 struct drm_named_mode *named_modes; }; #define obj_to_connector(x) container_of(x, struct drm_connector, base)