From patchwork Wed Aug 14 19:01:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 819190 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 7516B1BD514 for ; Wed, 14 Aug 2024 19:02:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723662134; cv=none; b=Z33u2HHzM3Pw+WQ3lH0RIWTH55WRtayASJ6gvy6gBfuOMbz9bY2rynqm+L14NwugGc49cYZoQjOEnE847E/Q/wQVAOxFk/xVX4mezbAbUDy6uBk4G6YNdDxcdbPQy7OZHsA/DsfS31cpMoVhKJM8nv+wc6f+CNhPZ++RzDnhb5A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723662134; c=relaxed/simple; bh=DGy+c13+26Igia4lcHdcGdci1sn6tyDhQb+bo4/0JFA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=A19esbuMKBLpkb6cp3C7WaQZQVIXjxhs8w9nV+jBSW+tf7hpsMFAHcRe5EgFb9Xfoz5NUV6wR+cgVip3GtiMsMnTW+kmp7PHeshVAazA+bn3A/Yt31jfhFcYO7kBXgeLHw468Cjuoi3OIBWlDKGTZJ0OTyFMtxVvhNOmxt70kuQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Bmql6bD3; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Bmql6bD3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1723662131; 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=3/HYaNpt+Hxgow8hyB4/IctLXMbXyzlPpsD0bDBpFGE=; b=Bmql6bD3uUY4n6E83qs6luk0Lz4ihuj8FEOswUUre2GqsQNI8RH4GDtAhwel4gyNCqvF59 kgHIfNwHB4KR3HShP6xcQH173sPgSUMoCirXRAO2rMicCJaRz1vk5oIb62CiZ8GzzvpE6T G/cpTZ6st3bgZaI3+JTM0eAT1YfyiXM= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-264-9ojPAhtCPGakEkwjO7Rkug-1; Wed, 14 Aug 2024 15:02:08 -0400 X-MC-Unique: 9ojPAhtCPGakEkwjO7Rkug-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6099A1944CEE; Wed, 14 Aug 2024 19:02:06 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.22]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AC0AB19560AA; Wed, 14 Aug 2024 19:02:03 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko Cc: Hans de Goede , dri-devel@lists.freedesktop.org, linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 1/3] ACPI: video: Add Dell UART backlight controller detection Date: Wed, 14 Aug 2024 21:01:57 +0200 Message-ID: <20240814190159.15650-2-hdegoede@redhat.com> In-Reply-To: <20240814190159.15650-1-hdegoede@redhat.com> References: <20240814190159.15650-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Dell All In One (AIO) models released after 2017 use a backlight controller board connected to an UART. In DSDT this uart port will be defined as: Name (_HID, "DELL0501") Name (_CID, EisaId ("PNP0501") Commit 484bae9e4d6a ("platform/x86: Add new Dell UART backlight driver") has added support for this, but I neglected to tie this into acpi_video_get_backlight_type(). Now the first AIO has turned up which has not only the DSDT bits for this, but also an actual controller attached to the UART, yet it is not using this controller for backlight control. Add support to acpi_video_get_backlight_type() for a new dell_uart backlight type. So that the existing infra to override the backlight control method on the commandline or with DMI quirks can be used. Fixes: 484bae9e4d6a ("platform/x86: Add new Dell UART backlight driver") Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede --- drivers/acpi/video_detect.c | 7 +++++++ include/acpi/video.h | 1 + 2 files changed, 8 insertions(+) diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index c11cbe5b6eaa..e509dcbf3090 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -54,6 +54,8 @@ static void acpi_video_parse_cmdline(void) acpi_backlight_cmdline = acpi_backlight_nvidia_wmi_ec; if (!strcmp("apple_gmux", acpi_video_backlight_string)) acpi_backlight_cmdline = acpi_backlight_apple_gmux; + if (!strcmp("dell_uart", acpi_video_backlight_string)) + acpi_backlight_cmdline = acpi_backlight_dell_uart; if (!strcmp("none", acpi_video_backlight_string)) acpi_backlight_cmdline = acpi_backlight_none; } @@ -918,6 +920,7 @@ enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto static DEFINE_MUTEX(init_mutex); static bool nvidia_wmi_ec_present; static bool apple_gmux_present; + static bool dell_uart_present; static bool native_available; static bool init_done; static long video_caps; @@ -932,6 +935,7 @@ enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto &video_caps, NULL); nvidia_wmi_ec_present = nvidia_wmi_ec_supported(); apple_gmux_present = apple_gmux_detect(NULL, NULL); + dell_uart_present = acpi_dev_present("DELL0501", NULL, -1); init_done = true; } if (native) @@ -962,6 +966,9 @@ enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto if (apple_gmux_present) return acpi_backlight_apple_gmux; + if (dell_uart_present) + return acpi_backlight_dell_uart; + /* Use ACPI video if available, except when native should be preferred. */ if ((video_caps & ACPI_VIDEO_BACKLIGHT) && !(native_available && prefer_native_over_acpi_video())) diff --git a/include/acpi/video.h b/include/acpi/video.h index 3d538d4178ab..044c463138df 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -50,6 +50,7 @@ enum acpi_backlight_type { acpi_backlight_native, acpi_backlight_nvidia_wmi_ec, acpi_backlight_apple_gmux, + acpi_backlight_dell_uart, }; #if IS_ENABLED(CONFIG_ACPI_VIDEO) From patchwork Wed Aug 14 19:01:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 820334 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 0F2271BE234 for ; Wed, 14 Aug 2024 19:02:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723662139; cv=none; b=mRWAKj4KlJagvMJlK/PvmeBl5DphlIwjrIM6XlB/RsUWK1/LENwqXB6f7ArhIixCfOK5tK3mJ2Ncut7X2IQadKS6SfRSH69QUO0ZC4zVOYm5DWbSNh9ValGlbHBtSs2EOum0ozI7NRGkPJlQJWyjXW/p297Ss10nxSJpjXsDs9A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723662139; c=relaxed/simple; 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Wed, 14 Aug 2024 19:02:06 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko Cc: Hans de Goede , dri-devel@lists.freedesktop.org, linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 2/3] platform/x86: dell-uart-backlight: Use acpi_video_get_backlight_type() Date: Wed, 14 Aug 2024 21:01:58 +0200 Message-ID: <20240814190159.15650-3-hdegoede@redhat.com> In-Reply-To: <20240814190159.15650-1-hdegoede@redhat.com> References: <20240814190159.15650-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 The dell-uart-backlight driver supports backlight control on Dell All In One (AIO) models using a backlight controller board connected to an UART. In DSDT this uart port will be defined as: Name (_HID, "DELL0501") Name (_CID, EisaId ("PNP0501") Now the first AIO has turned up which has not only the DSDT bits for this, but also an actual controller attached to the UART, yet it is not using this controller for backlight control. Use the acpi_video_get_backlight_type() function from the ACPI video-detect code to check if the dell-uart-backlight driver should actually be used. This allows reusing the existing ACPI video-detect infra to override the backlight control method on the commandline or with DMI quirks. Fixes: 484bae9e4d6a ("platform/x86: Add new Dell UART backlight driver") Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede --- drivers/platform/x86/dell/Kconfig | 1 + drivers/platform/x86/dell/dell-uart-backlight.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig index f711c59fcf1b..11c2cb7d05b0 100644 --- a/drivers/platform/x86/dell/Kconfig +++ b/drivers/platform/x86/dell/Kconfig @@ -162,6 +162,7 @@ config DELL_SMO8800 config DELL_UART_BACKLIGHT tristate "Dell AIO UART Backlight driver" depends on ACPI + depends on ACPI_VIDEO depends on BACKLIGHT_CLASS_DEVICE depends on SERIAL_DEV_BUS help diff --git a/drivers/platform/x86/dell/dell-uart-backlight.c b/drivers/platform/x86/dell/dell-uart-backlight.c index 87d2a20b4cb3..3995f90add45 100644 --- a/drivers/platform/x86/dell/dell-uart-backlight.c +++ b/drivers/platform/x86/dell/dell-uart-backlight.c @@ -20,6 +20,7 @@ #include #include #include +#include #include "../serdev_helpers.h" /* The backlight controller must respond within 1 second */ @@ -332,10 +333,17 @@ struct serdev_device_driver dell_uart_bl_serdev_driver = { static int dell_uart_bl_pdev_probe(struct platform_device *pdev) { + enum acpi_backlight_type bl_type; struct serdev_device *serdev; struct device *ctrl_dev; int ret; + bl_type = acpi_video_get_backlight_type(); + if (bl_type != acpi_backlight_dell_uart) { + dev_dbg(&pdev->dev, "Not loading (ACPI backlight type = %d)\n", bl_type); + return -ENODEV; + } + ctrl_dev = get_serdev_controller("DELL0501", NULL, 0, "serial0"); if (IS_ERR(ctrl_dev)) return PTR_ERR(ctrl_dev); From patchwork Wed Aug 14 19:01:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 820333 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 D46A71BE844 for ; Wed, 14 Aug 2024 19:02:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; 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Wed, 14 Aug 2024 19:02:13 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.22]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 8C3E319560AA; Wed, 14 Aug 2024 19:02:10 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko Cc: Hans de Goede , dri-devel@lists.freedesktop.org, linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 3/3] ACPI: video: Add backlight=native quirk for Dell OptiPlex 7760 AIO Date: Wed, 14 Aug 2024 21:01:59 +0200 Message-ID: <20240814190159.15650-4-hdegoede@redhat.com> In-Reply-To: <20240814190159.15650-1-hdegoede@redhat.com> References: <20240814190159.15650-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Dell All In One (AIO) models released after 2017 may use a backlight controller board connected to an UART. In DSDT this uart port will be defined as: Name (_HID, "DELL0501") Name (_CID, EisaId ("PNP0501") The Dell OptiPlex 7760 AIO has an ACPI device for one if its UARTs with the above _HID + _CID. Loading the dell-uart-backlight driver shows that there actually is a backlight controller board attached to the UART, which reports a firmware version of "G&MX01-V15". But the backlight controller board does not actually control the backlight brightness and the GPU's native backlight control method does work. Add a quirk to use the GPU's native backlight control method on this model. Fixes: 484bae9e4d6a ("platform/x86: Add new Dell UART backlight driver") Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2303936 Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede --- drivers/acpi/video_detect.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index e509dcbf3090..674b9db7a1ef 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -823,6 +823,21 @@ static const struct dmi_system_id video_detect_dmi_table[] = { }, }, + /* + * Dell AIO (All in Ones) which advertise an UART attached backlight + * controller board in their ACPI tables (and may even have one), but + * which need native backlight control nevertheless. + */ + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=2303936 */ + .callback = video_detect_force_native, + /* Dell OptiPlex 7760 AIO */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7760 AIO"), + }, + }, + /* * Models which have nvidia-ec-wmi support, but should not use it. * Note this indicates a likely firmware bug on these models and should