From patchwork Mon Mar 10 11:31:21 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Bezdeka X-Patchwork-Id: 872373 Received: from mta-64-228.siemens.flowmailer.net (mta-64-228.siemens.flowmailer.net [185.136.64.228]) (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 D623F1805A for ; Mon, 10 Mar 2025 11:31:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.136.64.228 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741606295; cv=none; b=eMDQcKQHwrbJ8FmyNZm95SdTAM1ktxEkMNUcmTbDIhhG1amZ2GhMPxzXh5NQW2rXBOAF793wAVmn9Os5h99t9q00Guj8p2DBzAXS2Nz7we1xciVfcougqXpd13JWcPPS5gCY+EngTUuR/B7fYVH8eN60wZ0Ai7F2JPl6eN5eaSI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741606295; c=relaxed/simple; bh=PmUJco581eI84QWVAENDTeGlBhPo2oHBhob0vs32eJo=; h=Message-ID:Subject:From:To:Cc:Date:Content-Type:MIME-Version; b=is0ipQ4sfmTMo/JfE0kaGE39JBDRIkP2rXlzf45YETyeUsLbNlV5xmFsVWyxzeBdfXx/vSgqZIpRMNvWZLlmXRI4zsJseBZMxUdMpF9Ffy50dU35I1OpjHcMSL2Z+iDASiEUAIywafwTxK8RfXWWRTyzroxWBYF7SG3AlDjLTk8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=siemens.com; spf=pass smtp.mailfrom=rts-flowmailer.siemens.com; dkim=pass (2048-bit key) header.d=siemens.com header.i=florian.bezdeka@siemens.com header.b=KQIK4H7S; arc=none smtp.client-ip=185.136.64.228 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=siemens.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rts-flowmailer.siemens.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=siemens.com header.i=florian.bezdeka@siemens.com header.b="KQIK4H7S" Received: by mta-64-228.siemens.flowmailer.net with ESMTPSA id 20250310113122a8ef1b46a1511a159b for ; Mon, 10 Mar 2025 12:31:22 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=fm1; d=siemens.com; i=florian.bezdeka@siemens.com; h=Date:From:Subject:To:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:Cc; bh=Sl4cTxmC0cH4u29M3rasbJ1MhRSnXaRK9pTj+m4LCUs=; b=KQIK4H7SIV/qElolQ1yatSIoMo7hXgRdS9AGbSSNknu+lRWtYHdjSP9We0TtZ9p1UTJjyg XkbzuHF+UhKb0GaP3wma85LH8ovgj9K0jsLoU7HCa30J8B3ustj2WlW/pLn4aK2bRx3Fodu8 AkAidIOTe5ZGQE+aoFh81ZBsSCtBKWVlOzE+nKeQ5DMphpCPGdzDxC+O7a3x9sk4EdGWEs/0 sRqbgCopWI0/Qw0jvpxyESz+FKilIAIxT4NgAya353ZlB0Uj/t6eRZkESLE1hdoKYgPfHwar 4CtQjDJA5ai6qeuI78Sk23INA+FaB1eqmlwsi0LH63mFuvMBk+i9ibQw==; Message-ID: Subject: 6.12: i915 not allowed in combination with RT From: Florian Bezdeka To: linux-rt-users@vger.kernel.org Cc: Sebastian Andrzej Siewior , Quirin Gylstorff , Jan Kiszka Date: Mon, 10 Mar 2025 12:31:21 +0100 Precedence: bulk X-Mailing-List: linux-rt-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Flowmailer-Platform: Siemens Feedback-ID: 519:519-68982:519-21489:flowmailer Hi all, the following commit (taken from 6.6-rt branch) resides in all stable- rt branches but is not part of mainline 6.12 and above, which makes it impossible to use i915 in combination with PREEMPT_RT enabled. Is that by intention? Are there any known issues that makes it necessary to disable i915 in combination with RT in current releases? Best regards, Florian commit f532acfe5c63d53756c86e3d3fb1a51b02d29762 Author: Sebastian Andrzej Siewior Date: Mon Feb 21 17:59:14 2022 +0100 Revert "drm/i915: Depend on !PREEMPT_RT." Once the known issues are addressed, it should be safe to enable the driver. Signed-off-by: Sebastian Andrzej Siewior diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig index 3efce05d7b57..392d51703096 100644 --- a/drivers/gpu/drm/i915/Kconfig +++ b/drivers/gpu/drm/i915/Kconfig @@ -3,7 +3,6 @@ config DRM_I915 tristate "Intel 8xx/9xx/G3x/G4x/HD Graphics" depends on DRM depends on X86 && PCI - depends on !PREEMPT_RT select INTEL_GTT if X86 select INTERVAL_TREE # we need shmfs for the swappable backing store, and in particular