From: Vinod Koul <vkoul@kernel.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Andy Gross <agross@kernel.org>, Rob Herring <robh+dt@kernel.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] arm64: dts: sdm845: Add iommus property to qup
Date: Mon, 23 Nov 2020 22:44:22 +0530 [thread overview]
Message-ID: <20201123171422.GE8403@vkoul-mobl> (raw)
In-Reply-To: <20201122034149.626045-1-bjorn.andersson@linaro.org>
On 21-11-20, 19:41, Bjorn Andersson wrote:
> From: Stephen Boyd <swboyd@chromium.org>
>
> The SMMU that sits in front of the QUP needs to be programmed properly
> so that the i2c geni driver can allocate DMA descriptors. Failure to do
> this leads to faults when using devices such as an i2c touchscreen where
> the transaction is larger than 32 bytes and we use a DMA buffer.
>
> arm-smmu 15000000.iommu: Unexpected global fault, this could be serious
> arm-smmu 15000000.iommu: GFSR 0x00000002, GFSYNR0 0x00000002, GFSYNR1 0x000006c0, GFSYNR2 0x00000000
>
> Add the right SID and mask so this works.
Reviewed-by: Vinod Koul <vkoul@kernel.org>
on DB845c with GSI DMA:
Tested-by: Vinod Koul <vkoul@kernel.org>
--
~Vinod
next prev parent reply other threads:[~2020-11-23 17:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-22 3:41 [PATCH v2] arm64: dts: sdm845: Add iommus property to qup Bjorn Andersson
2020-11-23 17:14 ` Vinod Koul [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-11-23 5:16 Caleb Connolly
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