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From: Peter Rosin <peda@axentia.se>
To: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Josh Wu <rainyfeeling@outlook.com>,
	linux-kernel@vger.kernel.org, Marek Vasut <marek.vasut@gmail.com>,
	linux-mtd@lists.infradead.org,
	Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>,
	Brian Norris <computersforpeace@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] mtd: nand: raw: atmel: add module param to avoid using dma
Date: Wed, 11 Apr 2018 17:10:43 +0200	[thread overview]
Message-ID: <bb64d0b1-bb3a-06b0-9e90-0caf7531f3c5@axentia.se> (raw)
In-Reply-To: <20180411165925.2be0d45b@bbrezillon>

On 2018-04-11 16:59, Boris Brezillon wrote:
> On Wed, 11 Apr 2018 16:44:10 +0200
> Peter Rosin <peda@axentia.se> wrote:
> 
>> Hi Nicolas,
>>
>> Boris asked for your input on this (the datasheet difference appears to
>> have no bearing on the issue) elsewhere in the tree of messages. It's
>> now been a week or so and I'm starting to wonder if you missed this
>> altogether or if you are simply out of office or something?
> 
> I was wondering if you had given up on this problem, it seems you did
> not.

I have my local patch to disable dma for the flash, but local patches
are always a disappointment.

>      Did you try forcing the HLCDC to use the 2nd interface (ahb_id=1)
> instead of the first one?

Just tried, and it's better that way, but the problem still exist and is
very visible on some (but apparently not all) flash accesses.

Cheers,
Peter

WARNING: multiple messages have this Message-ID (diff)
From: peda@axentia.se (Peter Rosin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] mtd: nand: raw: atmel: add module param to avoid using dma
Date: Wed, 11 Apr 2018 17:10:43 +0200	[thread overview]
Message-ID: <bb64d0b1-bb3a-06b0-9e90-0caf7531f3c5@axentia.se> (raw)
In-Reply-To: <20180411165925.2be0d45b@bbrezillon>

On 2018-04-11 16:59, Boris Brezillon wrote:
> On Wed, 11 Apr 2018 16:44:10 +0200
> Peter Rosin <peda@axentia.se> wrote:
> 
>> Hi Nicolas,
>>
>> Boris asked for your input on this (the datasheet difference appears to
>> have no bearing on the issue) elsewhere in the tree of messages. It's
>> now been a week or so and I'm starting to wonder if you missed this
>> altogether or if you are simply out of office or something?
> 
> I was wondering if you had given up on this problem, it seems you did
> not.

I have my local patch to disable dma for the flash, but local patches
are always a disappointment.

>      Did you try forcing the HLCDC to use the 2nd interface (ahb_id=1)
> instead of the first one?

Just tried, and it's better that way, but the problem still exist and is
very visible on some (but apparently not all) flash accesses.

Cheers,
Peter

  reply	other threads:[~2018-04-11 15:10 UTC|newest]

Thread overview: 117+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-29 13:10 [PATCH] mtd: nand: raw: atmel: add module param to avoid using dma Peter Rosin
2018-03-29 13:10 ` Peter Rosin
2018-03-29 13:33 ` Boris Brezillon
2018-03-29 13:33   ` Boris Brezillon
2018-03-29 13:37   ` Peter Rosin
2018-03-29 13:37     ` Peter Rosin
2018-03-29 13:44     ` Boris Brezillon
2018-03-29 13:44       ` Boris Brezillon
2018-03-29 14:27       ` Peter Rosin
2018-03-29 14:27         ` Peter Rosin
2018-03-30 21:43         ` Peter Rosin
2018-03-30 21:43           ` Peter Rosin
2018-04-02 12:22         ` Boris Brezillon
2018-04-02 12:22           ` Boris Brezillon
2018-04-02 17:59           ` Peter Rosin
2018-04-02 17:59             ` Peter Rosin
2018-04-02 19:28             ` Boris Brezillon
2018-04-02 19:28               ` Boris Brezillon
2018-04-02 20:20               ` Boris Brezillon
2018-04-02 20:20                 ` Boris Brezillon
2018-04-02 20:32                 ` Boris Brezillon
2018-04-02 20:32                   ` Boris Brezillon
2018-04-03  6:11                 ` Peter Rosin
2018-04-03  6:11                   ` Peter Rosin
2018-04-03  7:18                   ` Boris Brezillon
2018-04-03  7:18                     ` Boris Brezillon
2018-04-11 14:44                     ` Peter Rosin
2018-04-11 14:44                       ` Peter Rosin
2018-04-11 14:59                       ` Boris Brezillon
2018-04-11 14:59                         ` Boris Brezillon
2018-04-11 15:10                         ` Peter Rosin [this message]
2018-04-11 15:10                           ` Peter Rosin
2018-04-11 15:34                           ` Boris Brezillon
2018-04-11 15:34                             ` Boris Brezillon
2018-04-11 15:34                       ` Nicolas Ferre
2018-04-11 15:34                         ` Nicolas Ferre
2018-04-12  7:18                         ` Peter Rosin
2018-04-12  7:18                           ` Peter Rosin
2018-05-22 18:03                         ` Peter Rosin
2018-05-22 18:03                           ` Peter Rosin
2018-05-23 10:42                           ` Boris Brezillon
2018-05-23 10:42                             ` Boris Brezillon
2018-05-25 14:51                         ` Tudor Ambarus
2018-05-25 14:51                           ` Tudor Ambarus
2018-05-26 17:40                           ` Peter Rosin
2018-05-26 17:40                             ` Peter Rosin
2018-05-27  9:18                           ` Peter Rosin
2018-05-27  9:18                             ` Peter Rosin
2018-05-27 22:11                             ` Peter Rosin
2018-05-27 22:11                               ` Peter Rosin
2018-05-28 10:10                               ` Peter Rosin
2018-05-28 10:10                                 ` Peter Rosin
2018-05-28 14:27                                 ` Boris Brezillon
2018-05-28 14:27                                   ` Boris Brezillon
2018-05-28 15:52                                   ` Peter Rosin
2018-05-28 15:52                                     ` Peter Rosin
2018-05-28 16:09                                     ` Boris Brezillon
2018-05-28 16:09                                       ` Boris Brezillon
2018-05-28 16:09                                     ` Nicolas Ferre
2018-05-28 16:09                                       ` Nicolas Ferre
2018-05-29  6:30                                 ` Eugen Hristev
2018-05-29  6:30                                   ` Eugen Hristev
2018-05-29  7:10                                   ` Peter Rosin
2018-05-29  7:10                                     ` Peter Rosin
2018-05-29  7:25                                     ` Eugen Hristev
2018-05-29  7:25                                       ` Eugen Hristev
2018-05-29 14:49                                   ` Boris Brezillon
2018-05-29 14:49                                     ` Boris Brezillon
2018-05-29 15:01                                     ` Eugen Hristev
2018-05-29 15:01                                       ` Eugen Hristev
2018-05-29 15:15                                       ` Boris Brezillon
2018-05-29 15:15                                         ` Boris Brezillon
2018-05-29 15:21                                         ` Eugen Hristev
2018-05-29 15:21                                           ` Eugen Hristev
2018-05-29 15:46                                           ` Boris Brezillon
2018-05-29 15:46                                             ` Boris Brezillon
2018-05-29 17:57                                             ` Boris Brezillon
2018-05-29 17:57                                               ` Boris Brezillon
2018-05-29 21:37                                               ` Peter Rosin
2018-05-29 21:37                                                 ` Peter Rosin
2018-06-04 15:46                                 ` Tudor Ambarus
2018-06-04 15:46                                   ` Tudor Ambarus
2018-06-04 16:03                                   ` Boris Brezillon
2018-06-04 16:03                                     ` Boris Brezillon
2022-06-16 15:54                           ` SAMA5D3 Display FIFO underflow (Was: Re: [PATCH] mtd: nand: raw: atmel: add module param to avoid using dma) Ahmad Fatoum
2022-07-25 14:17                             ` Ahmad Fatoum
2022-07-28  8:03                               ` Tudor.Ambarus
2018-04-03  6:51                 ` [PATCH] mtd: nand: raw: atmel: add module param to avoid using dma Peter Rosin
2018-04-03  6:51                   ` Peter Rosin
2018-04-03  7:15                   ` Boris Brezillon
2018-04-03  7:15                     ` Boris Brezillon
2018-04-03  7:32                     ` Boris Brezillon
2018-04-03  7:32                       ` Boris Brezillon
2018-04-03  8:14                     ` Peter Rosin
2018-04-03  8:14                       ` Peter Rosin
2018-04-03  8:30                       ` Boris Brezillon
2018-04-03  8:30                         ` Boris Brezillon
2018-04-02 20:23               ` Peter Rosin
2018-04-02 20:23                 ` Peter Rosin
2018-04-02 20:35                 ` Boris Brezillon
2018-04-02 20:35                   ` Boris Brezillon
2018-04-03  7:18                 ` Alexandre Belloni
2018-04-03  7:18                   ` Alexandre Belloni
2018-04-03  8:37                   ` Peter Rosin
2018-04-03  8:37                     ` Peter Rosin
2018-03-29 14:20 ` Nicolas Ferre
2018-03-29 14:20   ` Nicolas Ferre
2018-03-29 14:23   ` Peter Rosin
2018-03-29 14:23     ` Peter Rosin
2018-03-29 14:29   ` Boris Brezillon
2018-03-29 14:29     ` Boris Brezillon
2018-06-18  8:39 ` Boris Brezillon
2018-06-18  8:39   ` Boris Brezillon
2018-06-18 14:00   ` Miquel Raynal
2018-06-18 14:00     ` Miquel Raynal
2018-06-25 12:31   ` Miquel Raynal
2018-06-25 12:31     ` Miquel Raynal

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