From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D644C43219 for ; Thu, 10 Nov 2022 20:21:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231956AbiKJUVX (ORCPT ); Thu, 10 Nov 2022 15:21:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231248AbiKJUVP (ORCPT ); Thu, 10 Nov 2022 15:21:15 -0500 Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49B8419013 for ; Thu, 10 Nov 2022 12:21:10 -0800 (PST) Received: by mail-lj1-x22b.google.com with SMTP id u2so2242623ljl.3 for ; Thu, 10 Nov 2022 12:21:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:in-reply-to:from:references:cc:to:subject :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=RE1ZPfOOMkFTJRsPaLh2a/8p9Ky7brLI2mjtWUnhvIU=; b=ZLbRJjSDhoU17vkT0JEuuvPOmTbk4IoXMGZIvXZ8p8FHI55PUrqBVTmkTfbYJ6+7Rz 2pXIRKfXZtYrUgDDp1mxDGiyYxOQRt6Dov61UIrPUYGHB2WwEUAO+i8NSYkDFzOQu7hz aTLCom2m2CxW5qSWrP30eIz/U6tvb07lw/WUlQXV1/Gy7iSXKiHhZoSp3U5RuqZx2Odv zK8v5+SEKj1Qrl5QHN7H0jJ/Sx2g0u7ZWyP2Y1gpAb8AmsD7/CwCNWVj6/tykv8WbH3B 12zzuXeWM6PR+YVJf/KkAmBkEk7Xyc9OLUCndyvvbwc+Iq+PO/6Vj6GvHK1owWOF68D3 AiNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to:subject :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=RE1ZPfOOMkFTJRsPaLh2a/8p9Ky7brLI2mjtWUnhvIU=; b=r5mZH5GGg0B2cQLlfL5t7NOf/Nv4M57qcQ0PfJHs7GV9iVmuy0vYhEhuKwB6CMJEzS aOzyhbJpn5ARslJjfyks3vLF1xetwi+7yYOPDumAScqbK8SOhlid+vz7rF2eKsW90z1b YFfGT7NBl5furUpBIVMRy4Vgt8EQfW1hvFojZ0rBtGVixBlevw/1AeDa8uqinh/51HUJ 4mS+ToCRF4Qs4vC1maendRI7zs8Ff1H8BLXIqIzrbHVQ1W8zXtB+0HASk91Y+sxJC60K CcbXbNk36WtVBmIPeLAzdWEZVA7W7D28W7MiaDw3uI+rbS1C8xI3r5F9G6C0tmfWF4aZ Plpg== X-Gm-Message-State: ACrzQf1MmB77mng8tFGsYthN8fJUdpRELKlzRo8ZTGM5znaFope/nOsJ BW20ZJJxQJZ/jySvajXv+frQaw== X-Google-Smtp-Source: AMsMyM4sMRnEHSTwff8SGR2Q6I/T5vMDqoKpIMchh+5/G9OopKUdfo2OKHM9bAkUgMEiwowd3KUpsg== X-Received: by 2002:a2e:9899:0:b0:277:8144:2eb6 with SMTP id b25-20020a2e9899000000b0027781442eb6mr8265779ljj.45.1668111668640; Thu, 10 Nov 2022 12:21:08 -0800 (PST) Received: from [192.168.1.112] (95.49.32.193.neoplus.adsl.tpnet.pl. [95.49.32.193]) by smtp.gmail.com with ESMTPSA id q21-20020a056512211500b004b3c505a71dsm10679lfr.92.2022.11.10.12.21.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 10 Nov 2022 12:21:08 -0800 (PST) Message-ID: <52fa0ebd-e431-7159-ef1e-a2cde7c7a4e2@linaro.org> Date: Thu, 10 Nov 2022 21:21:05 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.4.1 Subject: Re: [PATCH v3 6/8] drm/msm/dpu: add support for MDP_TOP blackhole To: Dmitry Baryshkov , Andy Gross , Bjorn Andersson , Rob Clark , Sean Paul , Abhinav Kumar , Rob Herring , Krzysztof Kozlowski Cc: Stephen Boyd , David Airlie , Daniel Vetter , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, Vinod Koul References: <20221104130324.1024242-1-dmitry.baryshkov@linaro.org> <20221104130324.1024242-7-dmitry.baryshkov@linaro.org> <5c791922-1371-c9e7-4bdc-e1909956633f@linaro.org> From: Konrad Dybcio In-Reply-To: <5c791922-1371-c9e7-4bdc-e1909956633f@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On 10/11/2022 21:19, Dmitry Baryshkov wrote: > On 04/11/2022 16:58, Konrad Dybcio wrote: >> >> On 04/11/2022 14:03, Dmitry Baryshkov wrote: >>> On sm8450 a register block was removed from MDP TOP. Accessing it during >>> snapshotting results in NoC errors / immediate reboot. Skip accessing >>> these registers during snapshot. >> >> Must have been fun to debug.. >> >> >>> >>> Tested-by: Vinod Koul >>> Reviewed-by: Vinod Koul >>> Signed-off-by: Dmitry Baryshkov >>> --- >>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h |  1 + >>>   drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c        | 11 +++++++++-- >>>   2 files changed, 10 insertions(+), 2 deletions(-) >>> >>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h >>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h >>> index 38aa38ab1568..4730f8268f2a 100644 >>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h >>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h >>> @@ -92,6 +92,7 @@ enum { >>>       DPU_MDP_UBWC_1_0, >>>       DPU_MDP_UBWC_1_5, >>>       DPU_MDP_AUDIO_SELECT, >>> +    DPU_MDP_PERIPH_0_REMOVED, >>>       DPU_MDP_MAX >>>   }; >>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c >>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c >>> index f3660cd14f4f..95d8765c1c53 100644 >>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c >>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c >>> @@ -927,8 +927,15 @@ static void dpu_kms_mdp_snapshot(struct >>> msm_disp_state *disp_state, struct msm_k >>>           msm_disp_snapshot_add_block(disp_state, cat->wb[i].len, >>>                   dpu_kms->mmio + cat->wb[i].base, "wb_%d", i); >>> -    msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len, >>> -            dpu_kms->mmio + cat->mdp[0].base, "top"); >>> +    if (dpu_kms->hw_mdp->caps->features & >>> BIT(DPU_MDP_PERIPH_0_REMOVED)) { >>> +        msm_disp_snapshot_add_block(disp_state, 0x380, >>> +                dpu_kms->mmio + cat->mdp[0].base, "top"); >>> +        msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len - >>> 0x3a8, >>> +                dpu_kms->mmio + cat->mdp[0].base + 0x3a8, "top_2"); >> >> Are these values expected to stay the same on different new-gen SoCs? >> Maybe it would >> >> be worth making it dynamic. > > I do not want to overcomplicate this. Let's make it dynamic once there > is need for that. For now I expect this will be static. Let's roll with that. Reviewed-by: Konrad Dybcio Konrad > >> >> >> Konrad >> >>> +    } else { >>> +        msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len, >>> +                dpu_kms->mmio + cat->mdp[0].base, "top"); >>> +    } >>>       pm_runtime_put_sync(&dpu_kms->pdev->dev); >>>   } >