From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Xilin Wu <sophon@radxa.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] arm64: dts: qcom: sc8280xp: Mark FastRPC context banks as dma-coherent
Date: Wed, 9 Sep 2026 14:53:46 +0200 [thread overview]
Message-ID: <e4615794-843b-4351-9a1c-c69da5d36044@oss.qualcomm.com> (raw)
In-Reply-To: <20260909-sc8280xp-fastrpc-dma-coherent-v3-1-d38184e8cf9d@radxa.com>
On 9/9/26 10:08 AM, Xilin Wu wrote:
> The FastRPC context banks are DMA-coherent on SC8280XP. Describe this in
> the device tree so that the DMA API uses the appropriate coherency
> attributes for their mappings.
>
> When FastRPC allocates shared buffers from the system DMA heap, the
> missing property can cause intermittent failures while loading DSP
> libraries. Both fastrpc_test and the QAIRT platform validator can fail
> with DSP loader errors such as "mmap hdrs failed" and "bad address".
>
> Mark the ADSP, CDSP and SLPI FastRPC context banks as dma-coherent to fix
> these failures and allow QAIRT applications to run on the CDSP. It also
> matches the behavior of the Windows driver.
>
> Signed-off-by: Xilin Wu <sophon@radxa.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2026-09-09 12:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-09 8:08 Xilin Wu
2026-09-09 12:53 ` Konrad Dybcio [this message]
2026-09-18 1:49 ` Bjorn Andersson
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