From patchwork Sat Jun 12 15:17:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 12317139 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D40E6C48BCF for ; Sat, 12 Jun 2021 15:23:13 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 49A5A6120E for ; Sat, 12 Jun 2021 15:23:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 49A5A6120E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=i2se.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7595A6E1E6; Sat, 12 Jun 2021 15:23:12 +0000 (UTC) X-Greylist: delayed 310 seconds by postgrey-1.36 at gabe; Sat, 12 Jun 2021 15:23:10 UTC Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.187]) by gabe.freedesktop.org (Postfix) with ESMTPS id 508046E1E6 for ; Sat, 12 Jun 2021 15:23:10 +0000 (UTC) Received: from [192.168.1.107] ([37.4.249.157]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MHXSD-1m5Zuy2GSv-00Dbhy; Sat, 12 Jun 2021 17:17:53 +0200 To: Maxime Ripard , Nicolas Saenz Julienne From: Stefan Wahren Subject: vc4_bo_create: Failed to allocate from CMA Autocrypt: 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Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: DRI Development Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi, while testing the mainline kernel (arm64, defconfig) on Raspberry Pi 3 B Plus with Raspberry Pi OS - 64 bit, sometimes X doesn't start into desktop properly (unexpected and unusable login screen instead of auto login or mouse pointer is show shorty and than switch back to black screen in a loop). In that case dmesg shows the following: [   74.737106] [drm:vc4_bo_create [vc4]] *ERROR* Failed to allocate from CMA: [   74.737558] vc4-drm soc:gpu: [drm]                            V3D:  28976kb BOs (10) [   74.737602] vc4-drm soc:gpu: [drm]                     V3D shader:     44kb BOs (11) [   74.737632] vc4-drm soc:gpu: [drm]                           dumb:   4564kb BOs (5) [   74.737664] vc4-drm soc:gpu: [drm]                         binner:  16384kb BOs (1) [   74.737697] vc4-drm soc:gpu: [drm]                total purged BO:      4kb BOs (1) [   74.739039] [drm:vc4_bo_create [vc4]] *ERROR* Failed to allocate from CMA: [   74.739466] vc4-drm soc:gpu: [drm]                            V3D:  28972kb BOs (9) [   74.739512] vc4-drm soc:gpu: [drm]                     V3D shader:     44kb BOs (11) [   74.739541] vc4-drm soc:gpu: [drm]                           dumb:   4564kb BOs (5) [   74.739570] vc4-drm soc:gpu: [drm]                         binner:  16384kb BOs (1) [   74.739602] vc4-drm soc:gpu: [drm]                total purged BO:      4kb BOs (1) [   74.740718] [drm:vc4_bo_create [vc4]] *ERROR* Failed to allocate from CMA: [   74.741138] vc4-drm soc:gpu: [drm]                            V3D:  28972kb BOs (9) [   74.741171] vc4-drm soc:gpu: [drm]                     V3D shader:     44kb BOs (11) [   74.741202] vc4-drm soc:gpu: [drm]                           dumb:   4564kb BOs (5) [   74.741231] vc4-drm soc:gpu: [drm]                         binner:  16384kb BOs (1) [   74.741263] vc4-drm soc:gpu: [drm]                total purged BO:      4kb BOs (1) ... I have only seen this issue on arm64 with latest mainline kernel (5.13.0-rc5-00130-gf21b807c3cf8), but also with older kernel versions. So it's not a regression. It seems 64 bit needs more CMA. In case X started properly i was also able to reproduce these errors above by dis- and reconneting HDMI. So i increased CMA in bcm283x.dtsi and the problem disappeared: iff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi index b83a864..d1304cb 100644 The questions are: Is this the right way (tm) to fix this problem? And what is a sensible value (don't have a 4K display to test)? Best regards Stefan --- a/arch/arm/boot/dts/bcm283x.dtsi +++ b/arch/arm/boot/dts/bcm283x.dtsi @@ -37,7 +37,7 @@            cma: linux,cma {              compatible = "shared-dma-pool"; -            size = <0x4000000>; /* 64MB */ +            size = <0x6000000>; /* 96MB */              reusable;              linux,cma-default;          };