From nobody Sun Feb 8 17:42:49 2026 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0DDB420ADDF; Mon, 3 Feb 2025 16:16:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.198 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738599379; cv=none; b=PLz78V9Wz6hX0rDbFrO4N7p4EP31SdufuqOeSMukhPjzd2MIeQqTg+v/azQ/F4/Tk/oJu8+DdGZMpTXSHhfyw1RAIw47AW/mmapFGnyGVCExhJRJsL7Adn7k/pYamMlTfyG2XsjAQtwrvrv/US8T2PnnNAjqQ4DaJuPiZLV63XA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738599379; c=relaxed/simple; bh=asBk/Nh4HCaOWSrCJ+WvYDyEM2K5ZU9+gGTYfkKmS5w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=urRxinP1hjffDfLxpI7rZ132P0GqurEm77czUQrSaPFRzm4XQRutGF69kO26Cc9ibZ204UL2PgRSTArYWHsmguQst17deyQQIuv80dB9d9QvEn03FZ+I8fu4hBdP4Pq8jFsurN1bvN0sO7uQp/VhduVVLy7/OAgyL4YrF7880+E= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=PLv8ugY1; arc=none smtp.client-ip=217.70.183.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="PLv8ugY1" Received: by mail.gandi.net (Postfix) with ESMTPA id F2E9844292; Mon, 3 Feb 2025 16:16:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1738599374; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LmwX/1Q1RNDl1aoU1BI0wydrMi9PXMOL1skPCsvzrM8=; b=PLv8ugY1SVyiSl27A/DJL1gzKKC6xFXa4dP9xqGetlX9i3OAPMPHWYViMLQnDt6KYC+FRc /lq2aE+3bmD3D6b6ojWXS/gHx4N99Sxks7CBHASB/JYP0nZmOO7ipL+lqZ8+tfb9svban8 mxuBE0TcenRS3Bbm9snNwB9emekj6eER+blOAG1D/mT8ggC+fFwwWyV1GiQyNVKcMJa3Rc d3rjeBoKa0F1DAz/pvjOeL3W/Px7xpl0Ep6GBOeWUdHbybWPErTiChS8Lgkvk5QWQqNN8m WBgpKsV8SbJbXWkSlEj04yRGKVoWdra1VV2xHiqfbRSZ0ELmjFYVptns29jPLA== From: Herve Codina To: Alexander Stein , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dave Stevenson , =?UTF-8?q?Ma=C3=ADra=20Canal?= , Raspberry Pi Kernel Maintenance , Marek Vasut Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Louis Chauvet , Luca Ceresoli , Thomas Petazzoni , Herve Codina Subject: [PATCH v5 2/4] drm/atomic-helper: Introduce drm_atomic_helper_reset_crtc() Date: Mon, 3 Feb 2025 17:16:04 +0100 Message-ID: <20250203161607.223731-3-herve.codina@bootlin.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250203161607.223731-1-herve.codina@bootlin.com> References: <20250203161607.223731-1-herve.codina@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddukedtiecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepjfgvrhhvvgcuvehoughinhgruceohhgvrhhvvgdrtghoughinhgrsegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeehffeigfejueelueeuffelueefgfelhfejhfehieegudekteeiledttdfhffekffenucfkphepledtrdekledrudeifedruddvjeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeeltddrkeelrdduieefrdduvdejpdhhvghloheplhhotggrlhhhohhsthdrlhhotggrlhguohhmrghinhdpmhgrihhlfhhrohhmpehhvghrvhgvrdgtohguihhnrgessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepvdeipdhrtghpthhtoheprghlvgigrghnuggvrhdrshhtvghinhesvgifrdhtqhdqghhrohhuphdrtghomhdprhgtphhtthhopegrnhgurhiivghjrdhhrghjuggrsehinhhtvghlrdgtohhmpdhrtghpthhtohepnhgvihhlrdgrrhhmshhtrhhonhhgsehlihhnrghrohdrohhrghdprhgtphhtthhopehrfhhoshhssehkvghrnhgvlhdrohhrghdprhgtphhtthhopefnrghurhgvnhhtr dhpihhntghhrghrthesihguvggrshhonhgsohgrrhgurdgtohhmpdhrtghpthhtohepjhhonhgrsheskhifihgsohhordhsvgdprhgtphhtthhopehjvghrnhgvjhdrshhkrhgrsggvtgesghhmrghilhdrtghomhdprhgtphhtthhopegrihhrlhhivggusehgmhgrihhlrdgtohhm X-GND-Sasl: herve.codina@bootlin.com Content-Type: text/plain; charset="utf-8" drm_atomic_helper_reset_crtc() allows to reset the CRTC active outputs. This resets all active components available between the CRTC and connectors. Signed-off-by: Herve Codina Reviewed-by: Dmitry Baryshkov Reviewed-by: Maxime Ripard --- drivers/gpu/drm/drm_atomic_helper.c | 41 +++++++++++++++++++++++++++++ include/drm/drm_atomic_helper.h | 2 ++ 2 files changed, 43 insertions(+) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atom= ic_helper.c index 5186d2114a50..0a636c398578 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3362,6 +3362,47 @@ int drm_atomic_helper_disable_all(struct drm_device = *dev, } EXPORT_SYMBOL(drm_atomic_helper_disable_all); =20 +/** + * drm_atomic_helper_reset_crtc - reset the active outputs of a CRTC + * @crtc: DRM CRTC + * @ctx: lock acquisition context + * + * Reset the active outputs by indicating that connectors have changed. + * This implies a reset of all active components available between the CRT= C and + * connectors. + * + * Returns: + * 0 on success or a negative error code on failure. + */ +int drm_atomic_helper_reset_crtc(struct drm_crtc *crtc, + struct drm_modeset_acquire_ctx *ctx) +{ + struct drm_atomic_state *state; + struct drm_crtc_state *crtc_state; + int ret; + + state =3D drm_atomic_state_alloc(crtc->dev); + if (!state) + return -ENOMEM; + + state->acquire_ctx =3D ctx; + + crtc_state =3D drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) { + ret =3D PTR_ERR(crtc_state); + goto out; + } + + crtc_state->connectors_changed =3D true; + + ret =3D drm_atomic_commit(state); +out: + drm_atomic_state_put(state); + + return ret; +} +EXPORT_SYMBOL(drm_atomic_helper_reset_crtc); + /** * drm_atomic_helper_shutdown - shutdown all CRTC * @dev: DRM device diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helpe= r.h index 9aa0a05aa072..53382fe93537 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -139,6 +139,8 @@ int drm_atomic_helper_set_config(struct drm_mode_set *s= et, =20 int drm_atomic_helper_disable_all(struct drm_device *dev, struct drm_modeset_acquire_ctx *ctx); +int drm_atomic_helper_reset_crtc(struct drm_crtc *crtc, + struct drm_modeset_acquire_ctx *ctx); void drm_atomic_helper_shutdown(struct drm_device *dev); struct drm_atomic_state * drm_atomic_helper_duplicate_state(struct drm_device *dev, --=20 2.47.1