From: "Markus Schneider-Pargmann" <msp@baylibre.com>
To: "Frank Li" <Frank.li@oss.nxp.com>,
"Markus Schneider-Pargmann (TI)" <msp@baylibre.com>
Cc: "Vinod Koul" <vkoul@kernel.org>, "Frank Li" <Frank.Li@kernel.org>,
"Tony Lindgren" <tony@atomide.com>,
"Daniel Mack" <zonque@gmail.com>, <dmaengine@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
"Julien Panis" <jpanis@baylibre.com>,
"Mendez, Judith" <jm@ti.com>,
"Francis, Sebin" <sebin.francis@ti.com>, <stable@vger.kernel.org>
Subject: Re: [PATCH 1/4] dmaengine: ti: cppi41: Use td_queue to restore DMA_TDFDQ
Date: Wed, 04 Nov 2026 20:50:28 +0100 [thread overview]
Message-ID: <DMMORNOEOVC1.W8WMKFFWRVGU@baylibre.com> (raw)
In-Reply-To: <autue--8pip-cNQk@SMW015318>
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On Wed Nov 4, 2026 at 6:42 PM CET, Frank Li wrote:
> On Tue, Nov 03, 2026 at 08:37:28PM +0100, Markus Schneider-Pargmann (TI) wrote:
>> [You don't often get email from msp@baylibre.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
>>
>> In init_cppi41() td_queue.submit is used to setup DMA_TDFDQ. In
>> suspend/resume the same value is read, stored and restored.
>>
>> To get rid of the suspend register access, use td_queue.submit in resume
>> as well to restore the value.
>>
>> Cc: stable@vger.kernel.org
>
> Do you fix some problem? why only have cc stable without fixes tag?
This in itself does not fix an issue. But without removing the register
read in suspend the follow up patch would not be enough to make it work.
Best
Markus
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next prev parent reply other threads:[~2026-11-04 19:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 19:37 [PATCH 0/4] dmaengine: ti: cppi41: Fix suspend/resume issues Markus Schneider-Pargmann (TI)
2026-11-03 19:37 ` [PATCH 1/4] dmaengine: ti: cppi41: Use td_queue to restore DMA_TDFDQ Markus Schneider-Pargmann (TI)
2026-11-04 8:56 ` Adivi, Sai Sree Kartheek
2026-11-04 17:42 ` Frank Li
2026-11-04 19:50 ` Markus Schneider-Pargmann [this message]
2026-11-03 19:37 ` [PATCH 2/4] dmaengine: ti: cppi41: Fix register access in suspend_late Markus Schneider-Pargmann (TI)
2026-11-04 8:58 ` Adivi, Sai Sree Kartheek
2026-11-04 17:47 ` Frank Li
2026-11-03 19:37 ` [PATCH 3/4] dmaengine: ti: cppi41: Restore QMGR_MEMCTRL in resume Markus Schneider-Pargmann (TI)
2026-11-04 9:00 ` Adivi, Sai Sree Kartheek
2026-11-04 17:54 ` Frank Li
2026-11-03 19:37 ` [PATCH 4/4] dmaengine: ti: cppi41: Share register setup with resume Markus Schneider-Pargmann (TI)
2026-11-04 9:02 ` Adivi, Sai Sree Kartheek
2026-11-04 17:58 ` Frank Li
2026-11-04 16:32 ` [PATCH 0/4] dmaengine: ti: cppi41: Fix suspend/resume issues Judith Mendez
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