From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Nicolae Rosia <nicolae.rosia@gmail.com>, jiwang <jiada_wang@mentor.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>,
gregkh@linuxfoundation.org, jslaby@suse.cz,
linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
anton_bondarenko@mentor.com, dirk.behme@de.bosch.com
Subject: Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled
Date: Wed, 06 May 2015 18:12:51 +0200 [thread overview]
Message-ID: <554A3D83.8040707@linutronix.de> (raw)
In-Reply-To: <CAH=tA9G2sPaV5uoWrW0FwHd4FUtPL-A8=jgp3p6Y9ijxDLgdTw@mail.gmail.com>
On 05/06/2015 06:08 PM, Nicolae Rosia wrote:
> Hi,
> I believe I'm also affected by this BUG. I'm receiving lots of 0 and 1
> (ASCII, as presented by cat /dev/ttymxcX) and RX buffer is
> overflowing.
>
>> the firmware only supports imx6 series, AFAIK,
>> I checked with Freescale imx6 support team, due to
>> licensing issue, I am not entitled to upstream FSL SDMA firmware.
>> so seems currently disable SDMA support for uart is our only option
>> at the moment.
>>
>
> Have you submited a patch for this issue?
> How do I disable SDMA?
I reverted this patch. I am going to send a revert to Greg tomorrow
including why this is done and CC stable. I haven't yet received a
working SDMA firmware nor a hint where it is.
> Best regards,
> Nicolae Rosia
Sebastian
next prev parent reply other threads:[~2015-05-06 16:12 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-09 9:11 [PATCH v1 00/15] serial: imx: misc fix and features Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 01/15] serial: imx: add CREAD flag support Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 02/15] serial: imx: use locking to stop concurrent access of UCR1 Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 03/15] serial: imx: remove unneeded imx_transmit_buffer() from imx_start_tx() Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 04/15] serial: imx: TX DMA: clean up sg initialization Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 05/15] serial: imx: unmap sg in case of dmaengine_prep_slave_sg() failure Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 06/15] serial: imx: unmap scatter gather list in imx_flush_buffer Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 07/15] serial: imx: use dma_is_txing to synchronize dma_tx_callback and imx_dma_tx Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 08/15] Revert "serial: imx: always wake up the processes in the TX callback" Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 09/15] serial: imx: call imx_dma_tx() again in dma_tx_callback Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 10/15] serial: imx: disable TDMAEN in imx_flush_buffer() Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2015-04-09 12:00 ` Sebastian Andrzej Siewior
2015-04-13 7:40 ` jiwang
2015-04-13 7:40 ` jiwang
2015-04-13 8:06 ` Sebastian Andrzej Siewior
2015-04-17 9:18 ` jiwang
2015-04-17 9:18 ` jiwang
2015-04-17 10:31 ` Sebastian Andrzej Siewior
2015-05-06 16:08 ` Nicolae Rosia
2015-05-06 16:12 ` Sebastian Andrzej Siewior [this message]
2015-05-06 16:46 ` Nicolae Rosia
2015-05-06 17:30 ` Sebastian Andrzej Siewior
2015-05-07 13:55 ` Nicolae Rosia
2015-05-07 13:58 ` Sebastian Andrzej Siewior
2014-12-09 9:11 ` [PATCH v1 12/15] serial: imx: start rx_dma once RXFIFO is not empty Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 13/15] serial: imx: Enable UCR4_OREN in startup interface Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 14/15] serial: imx: Fix issue in software flow control Jiada Wang
2014-12-09 9:11 ` Jiada Wang
2014-12-09 9:11 ` [PATCH v1 15/15] serial: imx: Support sw flow control in DMA mode Jiada Wang
2014-12-09 9:11 ` Jiada Wang
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