From patchwork Fri May 19 13:29:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 684025 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 8B842C77B7F for ; Fri, 19 May 2023 13:29:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231727AbjESN3X (ORCPT ); Fri, 19 May 2023 09:29:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231689AbjESN3W (ORCPT ); Fri, 19 May 2023 09:29:22 -0400 Received: from mail-lj1-x230.google.com (mail-lj1-x230.google.com [IPv6:2a00:1450:4864:20::230]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23B4B12C for ; Fri, 19 May 2023 06:29:21 -0700 (PDT) Received: by mail-lj1-x230.google.com with SMTP id 38308e7fff4ca-2af2958db45so2093801fa.1 for ; Fri, 19 May 2023 06:29:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1684502960; x=1687094960; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=doFIHuCbi1YVLGjN4vxnw9b75i10GnebCx9q/QOL15k=; b=vpC3ulkASRqGn8JDBs5tnXu2hHqQIx4ICIOpPmVLaDtQLh9IcY1j2VIAg4oQTPi2VZ 5+1WsiWBj47Au35av90euQMg8riW7tadqA1QMvKRCqt8Q2Pq2K2rKPQtTWV4kmvwTQqK S/WjN4MxV3mBkbDcbJ2upI+GVVpJGrsY4SmOEIZOGqauNhy7qFaSH6SmZ9s7IUCyUOo+ gUuMN74J6bJ62kPEIICPLxEb5VnjMNdaHfzh4Fv1NFz2uXAcLHy4hOAU6PoSe2Cl/+ju LB8SRb767qiigjewmeKGZBr7UANxz4ACVhjSqRkZI5rn3qZTRpDMjlzRaBg/M2uS9N9z 6NxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684502960; x=1687094960; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=doFIHuCbi1YVLGjN4vxnw9b75i10GnebCx9q/QOL15k=; b=e/OCYWi57e8A7BqXkCjatRuGMEsb4ZywXh1Zv3bcT7MtwuomJgMTNLcXVxYbFPpfvT +HYF3YD1eDm1m1nk+XvInLZGI/BQckCH8aHdJQSSLq1aqYwlygsxo6gc9WDj7J5zkDge 6nOhkPCfB7RX0HJ5hkJthvojm+lEDez9l/MZVQdJQENS7iYD6GPRzetynFw3VZtzx9Nx x10ozxC4pJom55rMEWyTyt63FOZdc5vM03j3R2hdg+/9iC1KsxYnaLLFA+kGsdWovHFK HEyGQKQqMCJBvXobgZzCuvI/7FyEDrn29WvQc3ff2SrB3GU6ODAOS+NgS1fAzVOEA6Da TwNQ== X-Gm-Message-State: AC+VfDwZiSZKOpm3AXm7D6RG8qHgf5sZ9mR8BqGAEoQwOtCpmTZgFSWp Bs/hi2xIrqCChWNsMFBK8HqJ/A== X-Google-Smtp-Source: ACHHUZ50bmhAbe1oi24zRF/8KffXoT3mBKIYDg3bqRNVsvlHDe8AFm3aTVWehD8gfdv1uUdgzNLnqw== X-Received: by 2002:a2e:9008:0:b0:2a8:e44e:c75a with SMTP id h8-20020a2e9008000000b002a8e44ec75amr701082ljg.32.1684502960706; Fri, 19 May 2023 06:29:20 -0700 (PDT) Received: from [192.168.1.101] (abxi58.neoplus.adsl.tpnet.pl. [83.9.2.58]) by smtp.gmail.com with ESMTPSA id q24-20020a2e9698000000b002ad92dff470sm821384lji.134.2023.05.19.06.29.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 06:29:20 -0700 (PDT) From: Konrad Dybcio Date: Fri, 19 May 2023 15:29:08 +0200 Subject: [PATCH v2 3/6] drm/msm/a6xx: Skip empty protection ranges entries MIME-Version: 1.0 Message-Id: <20230517-topic-a7xx_prep-v2-3-5b9daa2b2cf0@linaro.org> References: <20230517-topic-a7xx_prep-v2-0-5b9daa2b2cf0@linaro.org> In-Reply-To: <20230517-topic-a7xx_prep-v2-0-5b9daa2b2cf0@linaro.org> To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter Cc: Marijn Suijten , Jonathan Marek , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1684502955; l=1049; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=3GlljK/1BVjiAo5f22OuFyyc96OvFEAFjCCjuTjlQ3o=; b=bKZaZzUq5kYs/sf4jVMg+tulUXXSPOs9cKM9Zmu9anxjshVp8a3LrjoUZMPM461mYhJbXqfEg qMBLVFezKetD8NdwTyoRO+QuKHUO87LXt8BxebSTJjMvJVRYH/9MjAv X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some specific SKUs leave certain protection range registers empty. Allow for that behavior. Signed-off-by: Konrad Dybcio --- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index deed42675fe2..8707e8b6ac7e 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -778,8 +778,11 @@ static void a6xx_set_cp_protect(struct msm_gpu *gpu) */ gpu_write(gpu, REG_A6XX_CP_PROTECT_CNTL, BIT(0) | BIT(1) | BIT(3)); - for (i = 0; i < count - 1; i++) - gpu_write(gpu, REG_A6XX_CP_PROTECT(i), regs[i]); + for (i = 0; i < count - 1; i++) { + /* Intentionally skip writing to some registers */ + if (regs[i]) + gpu_write(gpu, REG_A6XX_CP_PROTECT(i), regs[i]); + } /* last CP_PROTECT to have "infinite" length on the last entry */ gpu_write(gpu, REG_A6XX_CP_PROTECT(count_max - 1), regs[i]); } From patchwork Fri May 19 13:29:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 684024 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 C1E7FC77B75 for ; Fri, 19 May 2023 13:29:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231792AbjESN31 (ORCPT ); Fri, 19 May 2023 09:29:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48972 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231740AbjESN3Z (ORCPT ); Fri, 19 May 2023 09:29:25 -0400 Received: from mail-lj1-x229.google.com (mail-lj1-x229.google.com [IPv6:2a00:1450:4864:20::229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A4D7BC2 for ; Fri, 19 May 2023 06:29:23 -0700 (PDT) Received: by mail-lj1-x229.google.com with SMTP id 38308e7fff4ca-2ac89e6a5a1so36264761fa.0 for ; Fri, 19 May 2023 06:29:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1684502962; x=1687094962; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=aSc4FWFPOC7I3VWo73gY6L/30rahECGBPz2uIJ+lIl8=; b=WhLqizIUe0ihV8op6KYQ0ETVO1lZwrmjCRYqWNskYT4M3x6dwxEX/V+1VnG7Nb1DyG 0GQfht9+nzzHag994JeqCPRSHTLir5EovjTPlbjcFfRY8iNgvHcdzuszw76BufcbftcR bbHC1HS2uRbBmdWLpaTJh2akWO8ABZe2e1xPTFJxzqErbQcAe6so5wu5yVOxrFY9WYS6 ObVRDZz6qOQIQphahTtRDSndv3iDWoRg+kodvI38/oQsEr3dj64qmjjkNty9lBu6u61o cRBeb+WTDxkNMdRXl1dHwkthjorYO6mk46zBmfa93w2hQ1MTh/NKgJLNzcJJvD6okzig HtAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684502962; x=1687094962; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=aSc4FWFPOC7I3VWo73gY6L/30rahECGBPz2uIJ+lIl8=; b=QTDlYE9uQgPcfgU+6gx1PuknH4albC+qDBx3y2JlBTtFTAKXeYVjLt6BWZ326utwx2 GP9aUryObsdX7FnFehnukFtg4UP2OQvkeYE78bLzdZ82mcCe3l+kkOXIUESCGvaA2AOC vugt3SviASNLuNQEcmKFSM0JduLO1ZHxY+xsrd5vL5bLfqYngW97BV/KNhc7xTKAdSjP uqMOyUJgUubZddbJeext8cpLEwDBJZfRXAS6zd52tcqLnkHYXEKFIRddPf7S5StEvgQh iGLC1sgKzlJjw11hPciMHkPcmperJcWpgSMSnYHPtXKRMsL/862MUuXMJLLpN9QurJBn gmEQ== X-Gm-Message-State: AC+VfDzA36u8JoM5C93r3ZBMxVgQ6C6IUpTdlMcShesvyaK6UCFigAq0 NKgz8tgfpcYOCD8Y5gTVm2vOew== X-Google-Smtp-Source: ACHHUZ6oQv/6he5gGsXdMkQwEMtJlcbnBQCVhPWcr7LRJ1ol8If4CkHMG4T72Ez2SOllmCtresWkIA== X-Received: by 2002:a2e:87c4:0:b0:2af:164c:fe2 with SMTP id v4-20020a2e87c4000000b002af164c0fe2mr912523ljj.5.1684502962058; Fri, 19 May 2023 06:29:22 -0700 (PDT) Received: from [192.168.1.101] (abxi58.neoplus.adsl.tpnet.pl. [83.9.2.58]) by smtp.gmail.com with ESMTPSA id q24-20020a2e9698000000b002ad92dff470sm821384lji.134.2023.05.19.06.29.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 06:29:21 -0700 (PDT) From: Konrad Dybcio Date: Fri, 19 May 2023 15:29:09 +0200 Subject: [PATCH v2 4/6] drm/msm/a6xx: Ensure clean GMU state in a6xx_gmu_fw_start MIME-Version: 1.0 Message-Id: <20230517-topic-a7xx_prep-v2-4-5b9daa2b2cf0@linaro.org> References: <20230517-topic-a7xx_prep-v2-0-5b9daa2b2cf0@linaro.org> In-Reply-To: <20230517-topic-a7xx_prep-v2-0-5b9daa2b2cf0@linaro.org> To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter Cc: Marijn Suijten , Jonathan Marek , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1684502955; l=1213; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=AafR4gmpdLdCW49giEqj+iQDIXWZqQQlcHizyhfpHRg=; b=pn8OzaI5Ri6hDvb1u3A6LhAH/dRqj6QnBpKwRfCAUssKQJEc/UFbcCZZluulJqAJ8z5pIPGJ3 Tgrjt9hQs5UCewF2cCU5c8ZpISMVuhyKSrMMyazf8e/v79yi6BQEW+K X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org While it's not very well understood, there is some sort of a fault handler implemented in the GMU firmware which triggers when a certain bit is set, resulting in the M3 core not booting up the way we expect it to. Write a magic value to a magic register to hopefully prevent that from happening. Signed-off-by: Konrad Dybcio --- drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c index e16b4b3f8535..ea6d671e7c6c 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c @@ -796,6 +796,12 @@ static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state) gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_RANGE_0, (1 << 31) | (0xa << 18) | (0xa0)); + /* + * Snapshots toggle the NMI bit which will result in a jump to the NMI + * handler instead of __main. Set the M3 config value to avoid that. + */ + gmu_write(gmu, REG_A6XX_GMU_CM3_CFG, 0x4052); + chipid = adreno_gpu->rev.core << 24; chipid |= adreno_gpu->rev.major << 16; chipid |= adreno_gpu->rev.minor << 12; From patchwork Fri May 19 13:29:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 684023 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 86881C77B7F for ; Fri, 19 May 2023 13:29:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231807AbjESN33 (ORCPT ); Fri, 19 May 2023 09:29:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231773AbjESN30 (ORCPT ); Fri, 19 May 2023 09:29:26 -0400 Received: from mail-lj1-x231.google.com (mail-lj1-x231.google.com [IPv6:2a00:1450:4864:20::231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF122132 for ; Fri, 19 May 2023 06:29:24 -0700 (PDT) Received: by mail-lj1-x231.google.com with SMTP id 38308e7fff4ca-2af29b37bd7so1105931fa.1 for ; Fri, 19 May 2023 06:29:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1684502963; x=1687094963; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=Xbg/GarYLH0aFj2Z0GcGyUdxXKd4AWIEjgCUU5KwNKM=; b=vJuSxGYk/KQ7DJM8LMmmyVUgzqptU4GWlxJl2iPW+t5MM4OSpQeXAOGSISVK5GBoZ5 lQLfAMinnu3hVvPIQx7So0vMnFfLrNF1Xbro3spArt3sitaMsyprZCiRmesL3LzsFqTe bue4u8C7eXuVRgCx9jdHpIMOF6JkQKkkJESB2rUnksQ/SuBvAYmKLxTebQALspUgY6iZ GLFAgQ3iOk64ezVs0Q37K3j1Vw81Wyv97Pvo11VMrMS1eqAO/+o+vQCrBBGzlbfvWjHB 2GkLVfJ1zfm5Hz1mKURus7lkBUYYNighIwJoXV0cFsrJxqxhcq9op8TMrb5/WPlOLjJY /fdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684502963; x=1687094963; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Xbg/GarYLH0aFj2Z0GcGyUdxXKd4AWIEjgCUU5KwNKM=; b=O9p+U0QxqJuOVa9sLNLNG+9xu4JfBUQlk1fPA2iwnDMfB9qTTBwUYkGxaAFAcEFtAr gR1xKlg9VJe7gMDhSyaOfzlpY+//F3sr65NXOmGGt54NpdX7cNLA7x6EnKskI8zEmpBv rzlYvlQQ2acAcVDHONjMoOHgwLa+Si7hES9Y7Hxx8kxCjt4E7ONoRK5DMT/rYr0YGu8d 3PvLY2voXyrYJBt9EEqSlq51z44YdWOyF+iJJgIrzR/wsCRhj//IBOhGepFLOO6Tl3QQ GA+7XgOh8IM9BNUgFJKbb+doeWu3gk1ra5mOgu2ev30y1HJVXYsau8CyWuqtYiMKKNzc MMXA== X-Gm-Message-State: AC+VfDxmjgM4oxMmxqX5DseOdwPGunNj+wudqTHc/SXVAVM4RwJngPA0 pfYNTbc80Ue2X/6DHpJIhVUPqQ== X-Google-Smtp-Source: ACHHUZ4Yth2SAVNi+Eug5CJ7mED480E+0pZkEVoxH2yZS/EH5piYwWMVhulX5pbYglTdS2y1CwboTQ== X-Received: by 2002:a2e:2417:0:b0:2aa:3cee:c174 with SMTP id k23-20020a2e2417000000b002aa3ceec174mr887376ljk.13.1684502963335; Fri, 19 May 2023 06:29:23 -0700 (PDT) Received: from [192.168.1.101] (abxi58.neoplus.adsl.tpnet.pl. [83.9.2.58]) by smtp.gmail.com with ESMTPSA id q24-20020a2e9698000000b002ad92dff470sm821384lji.134.2023.05.19.06.29.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 06:29:23 -0700 (PDT) From: Konrad Dybcio Date: Fri, 19 May 2023 15:29:10 +0200 Subject: [PATCH v2 5/6] drm/msm/a6xx: Improve GMU force shutdown sequence MIME-Version: 1.0 Message-Id: <20230517-topic-a7xx_prep-v2-5-5b9daa2b2cf0@linaro.org> References: <20230517-topic-a7xx_prep-v2-0-5b9daa2b2cf0@linaro.org> In-Reply-To: <20230517-topic-a7xx_prep-v2-0-5b9daa2b2cf0@linaro.org> To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter Cc: Marijn Suijten , Jonathan Marek , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1684502955; l=999; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=tIqOHRwnY5c8M0EJh8c6iF51VO5nfDTSDxvclL4zDow=; b=KYPo2qeuYKLdvjj9oKoR1uGIGtpjAhcYDxd18dm3Lwi5iPiyTSKITY8bEUzM2vOEEa3w8ByAg sTMUWlNlnzwBn7Mt3wFvyNRhmol24Y9mXySPWHFi9n360y5ZUZIDaAF X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The GMU force shutdown sequence involves some additional register cleanup which was not implemented previously. Do so. Signed-off-by: Konrad Dybcio --- drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c index ea6d671e7c6c..8004b582e45f 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c @@ -930,6 +930,13 @@ static void a6xx_gmu_force_off(struct a6xx_gmu *gmu) /* Make sure there are no outstanding RPMh votes */ a6xx_gmu_rpmh_off(gmu); + /* Clear the WRITEDROPPED fields and put fence into allow mode */ + gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_STATUS_CLR, 0x7); + gmu_write(gmu, REG_A6XX_GMU_AO_AHB_FENCE_CTRL, 0); + + /* Make sure the above writes go through */ + wmb(); + /* Halt the gmu cm3 core */ gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);