linux-kernel - Re: [PATCH] drm/mediatek: make imported PRIME buffers contiguous

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Message-ID: <CAAFQd5CfCrKLVb9obuXcMpFzBUxyZhK4NAuUOEUTviN-mZ9H6w@mail.gmail.com>
Date:   Wed, 24 Jul 2019 13:22:03 +0900
From:   Tomasz Figa <tfiga@...omium.org>
To:     Alexandre Courbot <acourbot@...omium.org>
Cc:     CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        "list@....net:IOMMU DRIVERS <iommu@...ts.linux-foundation.org>, Joerg
        Roedel <joro@...tes.org>," <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/mediatek: make imported PRIME buffers contiguous

On Tue, Jul 23, 2019 at 2:34 PM Alexandre Courbot <acourbot@...omium.org> wrote:
>
> This driver requires imported PRIME buffers to appear contiguously in
> its IO address space. Make sure this is the case by setting the maximum
> DMA segment size to a better value than the default 64K on the DMA
> device, and use said DMA device when importing PRIME buffers.
>
> Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c | 47 ++++++++++++++++++++++++--
>  drivers/gpu/drm/mediatek/mtk_drm_drv.h |  2 ++
>  2 files changed, 46 insertions(+), 3 deletions(-)
>

Reviewed-by: Tomasz Figa <tfiga@...omium.org>

Best regards,
Tomasz