From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9F6CF60720F5 for ; Thu, 5 Nov 2026 15:56:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=pEJfZOVm; dkim=fail reason="signature verification failed" (1024-bit key, unprotected) header.d=collabora.com header.i=@collabora.com header.a=rsa-sha256 header.s=zohomail header.b=Da0wH/cG DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=sXVdw7vU5ofz/MC7RbWYsGV4+QyERagQ3Me77tggaqA=; b=pEJfZOVmHD25Ux kuhEHNcnKI0e1yxH8d3K8BIXK/29/Zy0oN3GtuOHW5hYau+74qb2TyU8WmgpEVPfRSXA2Ck2/K+uf IdkPYNCtX5fFcczdFghDw3WTk71Sbxp7pHGVKTbz/POe4i/7ae1zb5BwAzUvxmeLyY0Ch45ps8bqn vcEru5wyf1VyvOySxSoOJqm7X8htESvxgwCIxNYUUFhA0LJK/EfP+n2+quzYugINWqM83tBDQQOoQ yWYaGHiYv9Rp8k5ObrDKIiX1FRYOGF6u2ond7Fprl0Bmoerr+TIbA7kD9q6I79YfyTb0NpmHfcPlZ cN8vCHl2y2JLnWCc7mIg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOzpS-00000009UgP-4Bva; Thu, 05 Nov 2026 15:56:43 +0000 Received: from sender4-pp-f112.zoho.com ([136.143.188.112]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOzny-00000009Tjt-3Lgz; Thu, 05 Nov 2026 15:55:21 +0000 ARC-Seal: i=1; a=rsa-sha256; t=1793894005; cv=none; d=zohomail.com; s=zohoarc; b=R7uf2llnfIu0oqpbnc9sVETu5emQPBr69ahcUBhDgAgKf7TgqdbSkw+oYDyF4JOdNOKwBuwVfsZI/d9c/nE1eLBKB/NlVeC0O1QiIL+b6MtkQHBqEDg2M6TlFyJUF6jont21YyNmG66ZBR/zOaqPDIamx321zrfI5keTmIM2qcc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1793894005; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=sXVdw7vU5ofz/MC7RbWYsGV4+QyERagQ3Me77tggaqA=; b=DsNrNti6LrJiJzr7cUcac6V2ny95DWA5mJfQ8d5ezJgpFH7oRH80dMv+w3fB5M7XGgUWvGvQ0RHH2Vk8deSwxwJe94UsoQXQUgx+wHJ99iCXsL1e+xAaOwbOhabVhk2IiUNM8zkOyD4P6NIqaEOxCf6MHpnj1gGdro+XUuK4y3M= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=nicolas.frattaroli@collabora.com; dmarc=pass header.from= DKIM-Signature: a=rsa-sha256; b=Da0wH/cGyb1nyuZoG2Y+e2i436r0rCOAR3nUQui+vXs3iDVpWmjqAxKTNDi/II5cva0TJDNNg3LnWDDADgT9cTrh3Zon0XUYukoaE6OSqBkPWArm4iJ26EJ69jV0vU9Az86uzcr2gHr3f+eXo4vhmRtcXl2EhnNg8cBEezQmHbo=; c=relaxed/relaxed; s=zohomail; d=collabora.com; v=1; bh=sXVdw7vU5ofz/MC7RbWYsGV4+QyERagQ3Me77tggaqA=; h=Content-Description:Content-ID:Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Owner:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Resent-Sender:Resent-Cc:Resent-Date:Resent-To:Reply-To:Resent-Message-ID:Resent-From:Sender:Subject:To:Date:From:Message-Id:Reply-To:Subject:To:Cc; Received: by smtp.zohomail.com with SMTPS id 179389400272574.3566153246461; Thu, 5 Nov 2026 07:53:22 -0800 (PST) From: Nicolas Frattaroli Date: Thu, 05 Nov 2026 16:51:59 +0100 Subject: [PATCH v2 08/27] drm/connector: Add drm_display_info_is_vrr_capable X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261105-vrr-limiter-uapi-v2-8-55f4215be2c2@collabora.com> References: <20261105-vrr-limiter-uapi-v2-0-55f4215be2c2@collabora.com> In-Reply-To: <20261105-vrr-limiter-uapi-v2-0-55f4215be2c2@collabora.com> To: Xaver Hugl , Vidith Madhu , "Borah, Chaitanya Kumar" , Leo Li , Harry Wentland , Fangzhi Zuo , Daniel Stone , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Helge Deller , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , =?utf-8?q?Michel_D=C3=A4nzer?= Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, Derek Foreman , wayland-devel@lists.freedesktop.org, Nicolas Frattaroli X-Mailer: b4 0.15.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261105_075511_492877_B944C7AA X-CRM114-Status: GOOD ( 12.09 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Add a function to return whether a sink, as described by a drm_display_info struct, is capable of receiving VRR signals. For HDMI sinks, this can just check the HDMI specific vrr_cap.supported field, which is set by the EDID parsing code. For other types of displays, the generally agreed-upon method appears to be to check whether the monitor range's minimum frequency is above 0. Signed-off-by: Nicolas Frattaroli --- drivers/gpu/drm/drm_connector.c | 19 +++++++++++++++++++ include/drm/drm_connector.h | 2 ++ 2 files changed, 21 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 65c14b6e47a6..a44afba8c5ff 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -1378,6 +1378,25 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info, } EXPORT_SYMBOL(drm_display_info_set_bus_formats); +/** + * drm_display_info_is_vrr_capable - Check whether sink is VRR capable + * @info: pointer to a &struct drm_display_info representing the sink + * + * Check whether the sink supports variable refresh rate signals. + * + * Returns: + * - true if variable refresh rate is supported by the sink + * - false otherwise + */ +bool drm_display_info_is_vrr_capable(const struct drm_display_info *info) +{ + if (info->is_hdmi) + return info->hdmi.vrr_cap.supported; + + return info->monitor_range.min_vfreq > 0; +} +EXPORT_SYMBOL(drm_display_info_is_vrr_capable); + /* Optional connector properties. */ static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { { DRM_MODE_SCALE_NONE, "None" }, diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 9df745ecff92..5b6920c1a996 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1078,6 +1078,8 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info, const u32 *formats, unsigned int num_formats); +bool drm_display_info_is_vrr_capable(const struct drm_display_info *info); + /** * struct drm_connector_tv_margins - TV connector related margins * -- 2.56.0