From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Holler Subject: Re: [PATCH v2] ARM: dts: imx6dl: disable dma support for spi on i.mx6dl Date: Wed, 17 Sep 2014 12:56:24 +0200 Message-ID: <541968D8.2060609@ahsoftware.de> References: <1410327012-31185-1-git-send-email-b38343@freescale.com> <5416D26A.4080707@ahsoftware.de> <20140916035204.GB20800@Robin-OptiPlex-780> <541805E3.6080003@ahsoftware.de> <20140917085106.GB6369@Robin-OptiPlex-780> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140917085106.GB6369@Robin-OptiPlex-780> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Robin Gong Cc: shawn.guo-KZfg59tc24xl57MIdRCFDg@public.gmane.org, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, fugang.duan-KZfg59tc24xl57MIdRCFDg@public.gmane.org List-Id: devicetree@vger.kernel.org Am 17.09.2014 10:51, schrieb Robin Gong: > On Tue, Sep 16, 2014 at 11:41:55AM +0200, Alexander Holler wrote: >> Am 16.09.2014 05:52, schrieb Robin Gong: >>> On Mon, Sep 15, 2014 at 01:50:02PM +0200, Alexander Holler wrote: >>>> Am 10.09.2014 07:30, schrieb Robin Gong: >>>>> There is one weird data in rxfifo after one full rx/tx transfer >>>>> done sometimes. It looks a design issue and hard to workaround >>>>> totally, so disable dma functhion here. And will re-enable it >>>>> once the root cause found. >>>> >>>> Hmm, I experience problems with DMA too but on uart3. I'm using the same >>>> workaround for the uart (I've just commented out the dma entries in the DT). >>>> The problem manifests itself here such, that brcm_patchram_plus >>>> hangs while uploading the firmware to a BCM4330 connected at uart3 >>>> (reproducible). (...) > Yes, we just have fixed the BT issue over high speed UART last month. Suggest > you trying our patches based on v3.10. Thanks for the pointer. Will look if I will find these patches. Regards, Alexander Holler -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html