From patchwork Tue May 17 15:23:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 12852635 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AB1D1C433EF for ; Tue, 17 May 2022 15:23:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F417210EE1C; Tue, 17 May 2022 15:23:45 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5A5F810EE00 for ; Tue, 17 May 2022 15:23:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652801023; 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; bh=7nJqaMKU0QZZRpkaVkXvoI5hrSAoyhlwswTv6wQi4hM=; b=jMVd0rXMBYTCn22Tb+Z6YlGPTzK4qAONzWllVVJWHYqL1hr/EeSB4jiz0fPJzCGhhaFEGT ayrdyU3LAj7MBYc+34RJr5nvAkoOMoC/YF0BHl2Qk3s1pw88I8uVJSxXfqdd5Ql3W8N96A HUSwibMPSqAce4u/pGJRSXoCZodzunM= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-152-Q6i2ip8ZM4SjQYuBZ7G8BA-1; Tue, 17 May 2022 11:23:41 -0400 X-MC-Unique: Q6i2ip8ZM4SjQYuBZ7G8BA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5D9183817A6B; Tue, 17 May 2022 15:23:40 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.192.162]) by smtp.corp.redhat.com (Postfix) with ESMTP id 99322C15D7D; Tue, 17 May 2022 15:23:36 +0000 (UTC) From: Hans de Goede To: Ben Skeggs , Karol Herbst , Lyude , Daniel Dadap , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , Pan@freedesktop.org, Xinhui , "Rafael J . Wysocki" , Mika Westerberg , Mark Gross , Andy Shevchenko Date: Tue, 17 May 2022 17:23:17 +0200 Message-Id: <20220517152331.16217-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 Subject: [Intel-gfx] [PATCH 00/14] drm/kms: Stop registering multiple /sys/class/backlight devs for a single display X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-acpi@vger.kernel.org, David Airlie , nouveau@lists.freedesktop.org, intel-gfx , dri-devel@lists.freedesktop.org, platform-driver-x86@vger.kernel.org, amd-gfx@lists.freedesktop.org, Len Brown Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Hi All, As mentioned in my RFC titled "drm/kms: control display brightness through drm_connector properties": https://lore.kernel.org/dri-devel/0d188965-d809-81b5-74ce-7d30c49fee2d@redhat.com/ The first step towards this is to deal with some existing technical debt in backlight handling on x86/ACPI boards, specifically we need to stop registering multiple /sys/class/backlight devs for a single display. This series implements my RFC describing my plan for these cleanups: https://lore.kernel.org/dri-devel/98519ba0-7f18-201a-ea34-652f50343158@redhat.com/ Specifically patches 1-6 implement the "Fixing kms driver unconditionally register their "native" backlight dev" part. And patches 7-14 implement the "Fixing acpi_video0 getting registered for a brief time" time. Note this series does not deal yet with the "Other issues" part, I plan to do a follow up series for that. The changes in this series are good to have regardless of the further "drm/kms: control display brightness through drm_connector properties" plans. So I plan to push these upstream once they are ready (once reviewed). Since this crosses various subsystems / touches multiple kms drivers my plan is to provide an immutable branch based on say 5.19-rc1 and then have that get merged into all the relevant trees. Please review. Regards, Hans Hans de Goede (14): ACPI: video: Add a native function parameter to acpi_video_get_backlight_type() drm/i915: Don't register backlight when another backlight should be used drm/amdgpu: Don't register backlight when another backlight should be used drm/radeon: Don't register backlight when another backlight should be used drm/nouveau: Don't register backlight when another backlight should be used ACPI: video: Drop backlight_device_get_by_type() call from acpi_video_get_backlight_type() ACPI: video: Remove acpi_video_bus from list before tearing it down ACPI: video: Simplify acpi_video_unregister_backlight() ACPI: video: Make backlight class device registration a separate step ACPI: video: Remove code to unregister acpi_video backlight when a native backlight registers drm/i915: Call acpi_video_register_backlight() drm/nouveau: Register ACPI video backlight when nv_backlight registration fails drm/amdgpu: Register ACPI video backlight when skipping amdgpu backlight registration drm/radeon: Register ACPI video backlight when skipping radeon backlight registration drivers/acpi/acpi_video.c | 69 ++++++++++++++----- drivers/acpi/video_detect.c | 53 +++----------- drivers/gpu/drm/Kconfig | 2 + .../gpu/drm/amd/amdgpu/atombios_encoders.c | 14 +++- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 +++ .../gpu/drm/i915/display/intel_backlight.c | 7 ++ drivers/gpu/drm/i915/display/intel_display.c | 1 + drivers/gpu/drm/i915/display/intel_opregion.c | 2 +- drivers/gpu/drm/nouveau/nouveau_backlight.c | 14 ++++ drivers/gpu/drm/radeon/atombios_encoders.c | 7 ++ drivers/gpu/drm/radeon/radeon_encoders.c | 11 ++- .../gpu/drm/radeon/radeon_legacy_encoders.c | 7 ++ drivers/platform/x86/acer-wmi.c | 2 +- drivers/platform/x86/asus-laptop.c | 2 +- drivers/platform/x86/asus-wmi.c | 4 +- drivers/platform/x86/compal-laptop.c | 2 +- drivers/platform/x86/dell/dell-laptop.c | 2 +- drivers/platform/x86/eeepc-laptop.c | 2 +- drivers/platform/x86/fujitsu-laptop.c | 4 +- drivers/platform/x86/ideapad-laptop.c | 2 +- drivers/platform/x86/intel/oaktrail.c | 2 +- drivers/platform/x86/msi-laptop.c | 2 +- drivers/platform/x86/msi-wmi.c | 2 +- drivers/platform/x86/samsung-laptop.c | 2 +- drivers/platform/x86/sony-laptop.c | 2 +- drivers/platform/x86/thinkpad_acpi.c | 4 +- drivers/platform/x86/toshiba_acpi.c | 2 +- include/acpi/video.h | 8 ++- 28 files changed, 156 insertions(+), 84 deletions(-)