linux-kernel - Re: [PATCH] drm/msm: Fix MSM_INFO_GET

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Date:   Sun, 3 Jan 2021 02:30:18 +0100
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Iskren Chernev <iskren.chernev@...il.com>,
        Rob Clark <robdclark@...il.com>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm: Fix MSM_INFO_GET_IOVA with carveout

Kind reminder that MSM8974, 8994, 8992 and friends are held back by the lack of IOMMU support upstream. There has been an attempt back in 2014(!) [1], but it was either overlooked or forgotten about ever since. I'd be more than happy to see someone look into this, as I have some other bits (almost) ready for both 8974 and 94, but MMUs aren't something I understand well enough yet.

Konrad

[1] https://lists.linuxfoundation.org/pipermail/iommu/2014-June/008993.html