From: Philipp Zabel <p.zabel@pengutronix.de>
To: Abhilash Kesavan <a.kesavan@samsung.com>
Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
hirokazu.takata.wj@renesas.com, catalin.marinas@arm.com,
Will.Deacon@arm.com, heiko@sntech.de, shc_work@mail.ru,
nicoleotsuka@gmail.com, padma.v@samsung.com, arnd@arndb.de,
alsa-devel@alsa-project.org, shawn.guo@linaro.org,
bcousson@baylibre.com, tony@atomide.com, kernel@pengutronix.de,
kgene@kernel.org
Subject: Re: [PATCH v2 3/3] misc: sram: switch to ioremap_wc from ioremap
Date: Fri, 06 Feb 2015 17:10:07 +0100 [thread overview]
Message-ID: <1423239007.3864.44.camel@pengutronix.de> (raw)
In-Reply-To: <1423230328-6721-4-git-send-email-a.kesavan@samsung.com>
Am Freitag, den 06.02.2015, 19:15 +0530 schrieb Abhilash Kesavan:
> Currently, the SRAM allocator returns device memory via ioremap.
> This causes issues on ARM64 when the internal SoC SRAM allocated by
> the generic sram driver is used for audio playback. The destination
> buffer address (which is ioremapped SRAM) is not 64-bit aligned for
> certain streams (e.g. 44.1k sampling rate). In such cases we get
> unhandled alignment faults. Use ioremap_wc in place of ioremap which
> gives us normal non-cacheable memory instead of device memory.
>
> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
> Tested-by: Tony Lindgren <tony@atomide.com>
> Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
regards
Philipp
next prev parent reply other threads:[~2015-02-06 16:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-06 13:45 [PATCH v2 0/3] Switch to ioremap_wc in the SRAM allocator code Abhilash Kesavan
2015-02-06 13:45 ` [PATCH v2 1/3] m32r: add definition of ioremap_wc to io.h Abhilash Kesavan
2015-02-06 13:45 ` [PATCH v2 2/3] lib: devres: add a helper function for ioremap_wc Abhilash Kesavan
2015-02-06 13:45 ` [PATCH v2 3/3] misc: sram: switch to ioremap_wc from ioremap Abhilash Kesavan
2015-02-06 16:10 ` Philipp Zabel [this message]
2015-02-06 15:44 ` [PATCH v2 0/3] Switch to ioremap_wc in the SRAM allocator code Catalin Marinas
2015-03-01 16:30 ` [alsa-devel] " Abhilash Kesavan
2015-03-01 16:43 ` gregkh
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