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From: Rahul Navale <rahulnavale04@gmail.com>
To: Folker Schwesinger <dev@folker-schwesinger.de>
Cc: Rahul Navale <rahul.navale@ifm.com>,
	dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, vkoul@kernel.org,
	Frank.Li@kernel.org, michal.simek@amd.com, suraj.gupta2@amd.com,
	thomas.gessler@brueckmann-gmbh.de, radhey.shyam.pandey@amd.com,
	tomi.valkeinen@ideasonboard.com, rahulnavale04@gmail.com,
	marex@nabladev.com, marex@denx.de
Subject: Re: [RFC PATCH] dmaengine: xilinx_dma: Fix per-channel direction reporting via device_caps
Date: Thu, 26 Feb 2026 13:05:10 +0530	[thread overview]
Message-ID: <20260226073512.4595-1-rahulnavale04@gmail.com> (raw)
In-Reply-To: <DGHGTCJRRZCW.9TGXQW44V6RR@folker-schwesinger.de>

From: Rahul Navale <rahul.navale@ifm.com>

>in the RFC patch, rebuild and exercise your use case. Then please do
>dmesg|grep xilinx_dma_device_caps

Hi Folker,

Thanks for the suggestion.
I applied your RFC patch and added printk() in xilinx_dma_device_caps()
around the assignment of caps->directions.

After rebuilding and booting, I exercised the audio playback use case
and collected the requested logs. The callback is reached and prints
appear both during early boot and during playback. Issue still persists.
cyclic playback fails after the first buffer period.

Output of `dmesg | grep xilinx_dma_device_caps`:
root@pdm3:~# aplay closetoyou.wav
Playing WAVE 'closetoyou.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
^CAborted by signal Interrupt...
aplay: pcm_write:2178: write error: Interrupted system call
root@pdm3:~# aplay closetoyou.wav root@pdm3:~# dmesg | grep xilinx_dma_device_caps
[    0.318827] xilinx_dma_device_caps: caps->directions = 0x00000001
[    0.318832] xilinx_dma_device_caps: caps->directions = 0x00000001
[    0.319170] xilinx_dma_device_caps: caps->directions = 0x00000002
[    0.319175] xilinx_dma_device_caps: caps->directions = 0x00000002
[    6.375745] xilinx_dma_device_caps: caps->directions = 0x00000001
[    6.375762] xilinx_dma_device_caps: caps->directions = 0x00000001
[  133.401497] xilinx_dma_device_caps: caps->directions = 0x00000001
[  133.401513] xilinx_dma_device_caps: caps->directions = 0x00000001
root@pdm3:~#
root@pdm3:~# aplay closetoyou.wav
Playing WAVE 'closetoyou.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo

aplay: pcm_write:2178: write error: Interrupted system call
root@pdm3:~# aplay closetoyou.wav root@pdm3:~# dmesg | grep xilinx_dma_device_caps
[    0.318827] xilinx_dma_device_caps: caps->directions = 0x00000001
[    0.318832] xilinx_dma_device_caps: caps->directions = 0x00000001
[    0.319170] xilinx_dma_device_caps: caps->directions = 0x00000002
[    0.319175] xilinx_dma_device_caps: caps->directions = 0x00000002
[    6.375745] xilinx_dma_device_caps: caps->directions = 0x00000001
[    6.375762] xilinx_dma_device_caps: caps->directions = 0x00000001
[  133.401497] xilinx_dma_device_caps: caps->directions = 0x00000001
[  133.401513] xilinx_dma_device_caps: caps->directions = 0x00000001
[  167.802636] xilinx_dma_device_caps: caps->directions = 0x00000001
[  167.802651] xilinx_dma_device_caps: caps->directions = 0x00000001



  parent reply	other threads:[~2026-02-26  7:35 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-17 18:49 [RFC PATCH] dmaengine: xilinx_dma: Fix per-channel direction reporting via device_caps Folker Schwesinger
2026-02-20  9:14 ` Rahul Navale
2026-02-20  9:30   ` Pandey, Radhey Shyam
2026-02-20 13:28 ` Rahul Navale
2026-02-20 19:09   ` Folker Schwesinger
2026-02-24  9:30 ` Rahul Navale
2026-02-24 15:10   ` Folker Schwesinger
2026-02-26  7:35 ` Rahul Navale [this message]
2026-02-26 20:06   ` Folker Schwesinger
2026-02-26  8:02 ` Rahul Navale
2026-03-02  7:24 ` Rahul Navale
2026-03-03 20:09   ` Folker Schwesinger
2026-03-03 20:19     ` Folker Schwesinger
2026-03-04  8:35 ` Rahul Navale
2026-03-04 14:49   ` Folker Schwesinger
2026-03-05  7:23 ` Rahul Navale
2026-03-05  8:22   ` Folker Schwesinger
2026-03-05  8:29 ` Rahul Navale
2026-03-05  8:32   ` Folker Schwesinger
2026-03-05 11:27 ` Rahul Navale
2026-03-06 10:38   ` Folker Schwesinger
2026-03-09  7:28 ` Rahul Navale
2026-03-14  8:35   ` Folker Schwesinger
2026-03-16 22:35     ` Marek Vasut
2026-03-14  8:45 ` Folker Schwesinger
2026-03-17 10:49 ` Rahul Navale
2026-03-17 17:20   ` Marek Vasut
2026-03-18 12:35 ` Rahul Navale
2026-03-27 14:51   ` Marek Vasut
2026-03-25 14:22 ` Rahul Navale
2026-03-27 11:43   ` Michal Simek

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