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From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Robin Murphy <robin.murphy@arm.com>,
	chunkuang.hu@kernel.org, p.zabel@pengutronix.de
Cc: yong.wu@mediatek.com, airlied@gmail.com, daniel@ffwll.ch,
	matthias.bgg@gmail.com, dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3] drm/mediatek: Stop using iommu_present()
Date: Mon, 27 Nov 2023 09:56:07 +0100	[thread overview]
Message-ID: <c823cde4-5b64-4144-87b8-7d6c847d1eb3@collabora.com> (raw)
In-Reply-To: <fd1b62aa006556f29f37535814abfe41be63f7ae.1700746094.git.robin.murphy@arm.com>

Il 23/11/23 14:41, Robin Murphy ha scritto:
> Remove the pointless check. If an IOMMU is providing transparent DMA API
> ops for any device(s) we care about, the DT code will have enforced the
> appropriate probe ordering already. And if the IOMMU *is* entirely
> absent, then attempting to go ahead with CMA and either suceeding or
> failing decisively seems more useful than deferring forever.
> 
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>


Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>




WARNING: multiple messages have this Message-ID (diff)
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Robin Murphy <robin.murphy@arm.com>,
	chunkuang.hu@kernel.org, p.zabel@pengutronix.de
Cc: dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, matthias.bgg@gmail.com,
	yong.wu@mediatek.com
Subject: Re: [PATCH v3] drm/mediatek: Stop using iommu_present()
Date: Mon, 27 Nov 2023 09:56:07 +0100	[thread overview]
Message-ID: <c823cde4-5b64-4144-87b8-7d6c847d1eb3@collabora.com> (raw)
In-Reply-To: <fd1b62aa006556f29f37535814abfe41be63f7ae.1700746094.git.robin.murphy@arm.com>

Il 23/11/23 14:41, Robin Murphy ha scritto:
> Remove the pointless check. If an IOMMU is providing transparent DMA API
> ops for any device(s) we care about, the DT code will have enforced the
> appropriate probe ordering already. And if the IOMMU *is* entirely
> absent, then attempting to go ahead with CMA and either suceeding or
> failing decisively seems more useful than deferring forever.
> 
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>


Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>



WARNING: multiple messages have this Message-ID (diff)
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Robin Murphy <robin.murphy@arm.com>,
	chunkuang.hu@kernel.org, p.zabel@pengutronix.de
Cc: yong.wu@mediatek.com, airlied@gmail.com, daniel@ffwll.ch,
	matthias.bgg@gmail.com, dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3] drm/mediatek: Stop using iommu_present()
Date: Mon, 27 Nov 2023 09:56:07 +0100	[thread overview]
Message-ID: <c823cde4-5b64-4144-87b8-7d6c847d1eb3@collabora.com> (raw)
In-Reply-To: <fd1b62aa006556f29f37535814abfe41be63f7ae.1700746094.git.robin.murphy@arm.com>

Il 23/11/23 14:41, Robin Murphy ha scritto:
> Remove the pointless check. If an IOMMU is providing transparent DMA API
> ops for any device(s) we care about, the DT code will have enforced the
> appropriate probe ordering already. And if the IOMMU *is* entirely
> absent, then attempting to go ahead with CMA and either suceeding or
> failing decisively seems more useful than deferring forever.
> 
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>


Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>



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  reply	other threads:[~2023-11-27  8:56 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-23 13:41 [PATCH v3] drm/mediatek: Stop using iommu_present() Robin Murphy
2023-11-23 13:41 ` Robin Murphy
2023-11-23 13:41 ` Robin Murphy
2023-11-27  8:56 ` AngeloGioacchino Del Regno [this message]
2023-11-27  8:56   ` AngeloGioacchino Del Regno
2023-11-27  8:56   ` AngeloGioacchino Del Regno
2023-12-07 23:31 ` Chun-Kuang Hu
2023-12-07 23:31   ` Chun-Kuang Hu
2023-12-07 23:31   ` Chun-Kuang Hu

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