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[80.56.140.230]) by smtp.gmail.com with ESMTPSA id h8sm17612145pgs.3.2022.01.19.04.36.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Jan 2022 04:36:18 -0800 (PST) Message-ID: Date: Wed, 19 Jan 2022 13:36:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 From: Arend van Spriel Subject: Re: [PATCH v2 21/35] brcmfmac: chip: Only disable D11 cores; handle an arbitrary number To: Hector Martin , Kalle Valo , "David S. Miller" , Jakub Kicinski , Rob Herring , "Rafael J. Wysocki" , Len Brown , Arend van Spriel , Franky Lin , Hante Meuleman , Chi-hsien Lin , Wright Feng , Dmitry Osipenko Cc: Sven Peter , Alyssa Rosenzweig , Mark Kettenis , =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= , Pieter-Paul Giesberts , Linus Walleij , Hans de Goede , "John W. Linville" , "brian m. carlson" , Andy Shevchenko , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com References: <20220104072658.69756-1-marcan@marcan.st> <20220104072658.69756-22-marcan@marcan.st> In-Reply-To: <20220104072658.69756-22-marcan@marcan.st> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000f3853105d5eea190" Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org --000000000000f3853105d5eea190 Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/4/2022 8:26 AM, Hector Martin wrote: > At least on BCM4387, the D11 cores are held in reset on cold startup and > firmware expects to release reset itself. Just assert reset here and let > firmware deassert it. Premature deassertion results in the firmware > failing to initialize properly some of the time, with strange AXI bus > errors. > > Also, BCM4387 has 3 cores, up from 2. The logic for handling that is in > brcmf_chip_ai_resetcore(), but since we aren't using that any more, just > handle it here. Makes sense. 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