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Fri, 24 Jan 2020 12:05:46 -0600 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Fri, 24 Jan 2020 12:05:45 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Fri, 24 Jan 2020 12:05:45 -0600 Received: from [192.168.2.10] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 00OI5gfU118628; Fri, 24 Jan 2020 12:05:43 -0600 Subject: Re: [PATCH for-next] arm64: defconfig: Set bcm2835-dma as built-in To: Nicolas Saenz Julienne , Ulf Hansson References: From: Peter Ujfalusi Message-ID: Date: Fri, 24 Jan 2020 20:07:51 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200124_100553_542821_665D2200 X-CRM114-Status: GOOD ( 16.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: f.fainelli@gmail.com, Catalin Marinas , linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, Will Deacon , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Nicolas, On 1/24/20 4:47 PM, Nicolas Saenz Julienne wrote: >> If you need MMC rootfs then the DMA needs to be built in or have initrd >> with the modules. >> The driver expects to have DMA channel and it is going to wait for it to >> appear unless the request fails. >> >> Without moving the DMA as built in and removing the deferred probe >> handling form the MMC driver, one can just remove the DMA support from >> the mmc-bcm2835 as it is not used at all. > > Oh sorry, I meant to ask if the 'Fixes:' tag was really needed. Complements: or Needed-for: would be better, but with the Fixed tag this patch would be picked in case the dma_request_chan() conversion patch gets backported for stable. > The > patch itself is very much needed since not everyone uses initrds in the > RPi world, and we want to keep being compatible as much as possible with > older device-trees. Sure. Just checked on my RPi with libreELEC that at least they have the DMA built in, I assume other distros do the same. It would be great if this patch would make it to linux-next as soon as it is possible for sure. >> I wonder why this is not signaled by automated boot testing, if any >> exists for bcm2835> > Actually now that you mention it, it's failing since today here: > https://kernelci.org/boot/bcm2837-rpi-3-b/ Oh, so you can even have a bug report to back this patch ;) - Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel