From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 72F5C309F08; Tue, 10 Mar 2026 16:07:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773158829; cv=none; b=tUT9goQluBCOUWpTkN8m6uuLlrTBqjR8YidnK/p3AsEHbsoXF+oxDBiu1i2AHkUgJQFEVI8K5UrKTuKl3E/rkaTd2alcrhpl055yxka8L5qvAJoGH+z83egZBMGEqCajNdvgGALhNychjxuudrCr+BGvHSvjrpvkksSGHg7yupU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773158829; c=relaxed/simple; bh=Qq3X3N7gOYGl/sml9oYcc/UUAUhuLd5AlHRoJX3DFnI=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=ujNB7QSjCegrKXFYEBYf04HELIBXJFVAnTlBCIhRZcV48wmR0V6N2livtwSWCK7CsZDXYWl4/ik/Ol4TUQP3MtvKL8OVbRgk7HXSJjTGhHkOleWzpfikpwZhK3A5IwxQQNiCSDh4lH0euM6fY20EBlScZrToMlvwt+1Nx/y6Ank= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kXZcD01E; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kXZcD01E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2404C19423; Tue, 10 Mar 2026 16:07:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773158829; bh=Qq3X3N7gOYGl/sml9oYcc/UUAUhuLd5AlHRoJX3DFnI=; h=From:Subject:Date:To:Cc:From; b=kXZcD01Ew7k40ulLinffclGQghOeR6bCmU4TKHH6Dlr7G9UVyMNfkQ1/sV9DW8+qX 8BGIBoOo3ze2Xq5GJRzQDSzBBxpby7zbRmOcl48bw0V/VMUviWrUakbI9f4QCeFcGx ReVtmB4+uk4CJaPqv++MKTCo+bpIpRIeH0SuUFEta+D2TnfhGV2FCqMEcKrAZnfNSL XWuxzF2JtmbRmlR9D72bgQcM+BLmNAAlO7DfyDp+iaF2FZEYrPwxIiHtBfpF87hjyb vXMhUfdPhWmTrR9vjM9miQ/iFNTR7EIWfNYGDHQLcNvoh4kU5gNhx5xZ/UX55ZyIlN Ub4AF9XOql6lg== From: Maxime Ripard Subject: [PATCH 00/14] drm/atomic: Rework initial state allocation Date: Tue, 10 Mar 2026 17:06:52 +0100 Message-Id: <20260310-drm-mode-config-init-v1-0-de7397c8e1cf@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/02OQQqDMBBFryKz7kCSGi1epbiIZrRTSLRJKoJ49 0bddPnmM+//DSIFpghNsUGghSNPPoO8FdC/jB8J2WYGJVQl7lKgDQ7dZAn7yQ88IntOKEkOWnV 1qa2A/DoHGng9tc/24kCfb7an6widiYfCOU5NcTo59uhpTXhUoVCoKvhf0RQ50FKIx7lhDryYR Dh1bwwUKaEhSaoupVC1aRYN7b7/AMFUgnTfAAAA X-Change-ID: 20260310-drm-mode-config-init-1e1f52b745d0 To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Jonathan Corbet , Shuah Khan , Dmitry Baryshkov , Jyri Sarha , Tomi Valkeinen , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Maxime Ripard X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3440; i=mripard@kernel.org; h=from:subject:message-id; bh=Qq3X3N7gOYGl/sml9oYcc/UUAUhuLd5AlHRoJX3DFnI=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDJkbHBdnvgvgyniVOntjZkD/9vbAcj3ztkmTFx2YsknyZ /Yjg6/SHVNZGIQ5GWTFFFmeyISdXt6+uMrBfuUPmDmsTCBDGLg4BWAiZ9kZ69RYpy218VD723nB VcqGI23x7kUT5lyuku2f/Vgwi3H6mbpJVWL7T71nWMbzcf5n6xVqaoz14VPf3Nh/wMFJeXryk0Z PRTttr+Vr2N+GP5U209Y8b1z9S6aCn2U2e/U09ohdXPH1a0sA X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D Hi, This series started from my work on the hardware state readout[1], and more specifically a discussion with Thomas[2]. This series expands the work that has been merged recently to make drm_private_obj and drm_private_state allocation a bit more consistent and ended up creating a new atomic_create_state callback to allocate a new state with no side effect. The first patches are a documentation of the existing behaviour and some random cleanups. Then, we add the new atomic_create_state callback to every other DRM object. Next, we leverage those new callbacks to create a new helper, drm_mode_config_create_state() to create the initial state for all the objects of a driver. Finally, we hook that new helper in drm_dev_register and start converting a few drivers. This was tested on a TI SK-AM62, with the tidss driver. Let me know what you think, Maxime 1: https://lore.kernel.org/dri-devel/20250902-drm-state-readout-v1-0-14ad5315da3f@kernel.org/ 2: https://lore.kernel.org/dri-devel/5920ffe5-b6b1-484b-b320-332b9eb9db82@suse.de/ Signed-off-by: Maxime Ripard --- Maxime Ripard (14): drm/atomic: Document atomic state lifetime drm/atomic: Drop drm_private_state.obj assignment from create_state drm/mode-config: Mention drm_mode_config_reset() culprits drm/atomic-state-helper: Fix __drm_atomic_helper_plane_reset() doc typo drm/plane: Add new atomic_create_state callback drm/crtc: Add new atomic_create_state callback drm/connector: Add new atomic_create_state callback drm/mode-config: Create drm_mode_config_create_state() drm/drv: Call drm_mode_config_create_state() by default drm/atomic: Drop private obj state allocation drm/drv: Drop drm_mode_config_reset() from our skeleton drm/tidss: Drop call to drm_mode_config_reset at probe time drm/tidss: Convert to atomic_create_state drm/bridge_connector: Convert to atomic_create_state Documentation/gpu/drm-kms.rst | 6 ++ drivers/gpu/drm/display/drm_bridge_connector.c | 15 ++- drivers/gpu/drm/drm_atomic.c | 67 ++++++++++-- drivers/gpu/drm/drm_atomic_state_helper.c | 128 +++++++++++++++++++++- drivers/gpu/drm/drm_drv.c | 6 +- drivers/gpu/drm/drm_mode_config.c | 141 +++++++++++++++++++++++++ drivers/gpu/drm/tidss/tidss_crtc.c | 17 ++- drivers/gpu/drm/tidss/tidss_kms.c | 2 - drivers/gpu/drm/tidss/tidss_plane.c | 2 +- include/drm/drm_atomic_state_helper.h | 12 +++ include/drm/drm_connector.h | 13 +++ include/drm/drm_crtc.h | 13 +++ include/drm/drm_mode_config.h | 1 + include/drm/drm_plane.h | 13 +++ 14 files changed, 408 insertions(+), 28 deletions(-) --- base-commit: 7b80021b1f0daed917ecc7f75077df799a8a698c change-id: 20260310-drm-mode-config-init-1e1f52b745d0 prerequisite-change-id: 20251008-drm-private-obj-reset-ae1e2741027a:v5 prerequisite-patch-id: 9684f0ca4b16455c1340409561e8fb32f98b327a prerequisite-patch-id: e177eb92b269436a94d7ef603d44436799be7469 prerequisite-patch-id: fef6d20ab33358c1db6cd9d21aa8ec0990cae758 prerequisite-patch-id: 2dcc96d43f34d8f6237829ed29d0087c092954d1 Best regards, -- Maxime Ripard