linux-kernel - Re: [PATCH v8 0/8] dmaengine: sh: rz-dmac: Add tx

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Message-ID: <721cc697-0091-4938-80e9-93005f38c98d@tuxon.dev>
Date: Thu, 29 Jan 2026 11:44:18 +0200
From: Claudiu Beznea <claudiu.beznea@...on.dev>
To: vkoul@...nel.org, geert+renesas@...der.be, biju.das.jz@...renesas.com,
 fabrizio.castro.jz@...esas.com, prabhakar.mahadev-lad.rj@...renesas.com
Cc: dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v8 0/8] dmaengine: sh: rz-dmac: Add tx_status and
 pause/resume support

Hi,

Gentle ping on this series.

Thank you,
Claudiu

On 1/20/26 15:33, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Hi,
> 
> Series adds tx_status and pause/resume support for the rz-dmac driver.
> Along with it were added fixes and improvements identified while working
> on the above mentioned enhancements.
> 
> Previous versions were addressed by Biju. The previous versions were
> posted here:
> 
> v4: https://lore.kernel.org/all/20240628151728.84470-1-biju.das.jz@bp.renesas.com/
> v3: https://lore.kernel.org/all/20230412152445.117439-1-biju.das.jz@bp.renesas.com/
> v2: https://lore.kernel.org/all/20230405140842.201883-1-biju.das.jz@bp.renesas.com/
> v1: https://lore.kernel.org/all/20230324094957.115071-1-biju.das.jz@bp.renesas.com/
> 
> Changes in v8:
> - rebased on top of https://lore.kernel.org/all/20260105114445.878262-1-cosmin-gabriel.tanislav.xa@renesas.com/
> - populated engine->residue_granularity in patch 7/8
> - report proper residue in case the channel is paused in patch 8/8
> 
> Changes in v7:
> - adjusted the pause/resume support
> - collected tags
> 
> Changes in v6:
> - added patches:
> -- dmaengine: sh: rz-dmac: Drop read of CHCTRL register
> -- dmaengine: sh: rz-dmac: Drop goto instruction and label
> - use vc lock in IRQ handler only for the error path
> - fixed typos
> - adjusted patch
>    "dmaengine: sh: rz-dmac: Add device_{pause,resume}() callbacks"
> 
> Changes in v5:
> - added patches
> -- dmaengine: sh: rz-dmac: Add rz_dmac_invalidate_lmdesc()
> -- dmaengine: sh: rz-dmac: Protect the driver specific lists
> -- dmaengine: sh: rz-dmac: Move all CHCTRL updates under spinlock
> -- dmaengine: sh: rz-dmac: Drop unnecessary local_irq_save() call
> -- dmaengine: sh: rz-dmac: Add device_{pause,resume}() callbacks
> -- dmaengine: sh: rz-dmac: Add rz_dmac_invalidate_lmdesc()
> - for pause/resume used the DMA controller support to pause/resume
>    transfers compared with previous versions
> - adjusted patches:
> -- dmaengine: sh: rz-dmac: Add device_tx_status() callback
> 
> Thank you,
> Claudiu
> 
> Biju Das (2):
>    dmaengine: sh: rz-dmac: Add rz_dmac_invalidate_lmdesc()
>    dmaengine: sh: rz-dmac: Add device_tx_status() callback
> 
> Claudiu Beznea (6):
>    dmaengine: sh: rz-dmac: Protect the driver specific lists
>    dmaengine: sh: rz-dmac: Move CHCTRL updates under spinlock
>    dmaengine: sh: rz-dmac: Drop read of CHCTRL register
>    dmaengine: sh: rz-dmac: Drop goto instruction and label
>    dmaengine: sh: rz-dmac: Drop unnecessary local_irq_save() call
>    dmaengine: sh: rz-dmac: Add device_{pause,resume}() callbacks
> 
>   drivers/dma/sh/rz-dmac.c | 289 ++++++++++++++++++++++++++++++++-------
>   1 file changed, 239 insertions(+), 50 deletions(-)
>