From: Simon Ser <contact@emersion.fr>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: "daniel@ffwll.ch" <daniel@ffwll.ch>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"mjourdan@baylibre.com" <mjourdan@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-amlogic@lists.infradead.org"
<linux-amlogic@lists.infradead.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 7/8] drm/fourcc: amlogic: Add modifier definitions for the Scatter layout
Date: Wed, 25 Mar 2020 09:04:09 +0000 [thread overview]
Message-ID: <JgBZ7eZYMgXRNu_-E4ItS1bud9mEe15xptZEX_XhsM_h8_iIZTOmPokEVxPJYwX0wP0pmb5p-ymubyyZP3kVbcfuDNdmM0__L8wBR5IykfE=@emersion.fr> (raw)
In-Reply-To: <20200325085025.30631-8-narmstrong@baylibre.com>
On Wednesday, March 25, 2020 9:50 AM, Neil Armstrong <narmstrong@baylibre.com> wrote:
> Amlogic uses a proprietary lossless image compression protocol and format
> for their hardware video codec accelerators, either video decoders or
> video input encoders.
>
> This introduces the Scatter Memory layout, means the header contains IOMMU
> references to the compressed frames content to optimize memory access
> and layout.
>
> In this mode, only the header memory address is needed, thus the content
> memory organization is tied to the current producer execution and cannot
> be saved/dumped neither transferrable between Amlogic SoCs supporting this
> modifier.
I don't think this is suitable for modifiers. User-space relies on
being able to copy a buffer from one machine to another over the
network. It would be pretty annoying for user-space to have a blacklist
of modifiers that don't work this way.
Example of such user-space:
https://gitlab.freedesktop.org/mstoeckl/waypipe/
WARNING: multiple messages have this Message-ID (diff)
From: Simon Ser <contact@emersion.fr>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: "mjourdan@baylibre.com" <mjourdan@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"daniel@ffwll.ch" <daniel@ffwll.ch>,
"linux-amlogic@lists.infradead.org"
<linux-amlogic@lists.infradead.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 7/8] drm/fourcc: amlogic: Add modifier definitions for the Scatter layout
Date: Wed, 25 Mar 2020 09:04:09 +0000 [thread overview]
Message-ID: <JgBZ7eZYMgXRNu_-E4ItS1bud9mEe15xptZEX_XhsM_h8_iIZTOmPokEVxPJYwX0wP0pmb5p-ymubyyZP3kVbcfuDNdmM0__L8wBR5IykfE=@emersion.fr> (raw)
In-Reply-To: <20200325085025.30631-8-narmstrong@baylibre.com>
On Wednesday, March 25, 2020 9:50 AM, Neil Armstrong <narmstrong@baylibre.com> wrote:
> Amlogic uses a proprietary lossless image compression protocol and format
> for their hardware video codec accelerators, either video decoders or
> video input encoders.
>
> This introduces the Scatter Memory layout, means the header contains IOMMU
> references to the compressed frames content to optimize memory access
> and layout.
>
> In this mode, only the header memory address is needed, thus the content
> memory organization is tied to the current producer execution and cannot
> be saved/dumped neither transferrable between Amlogic SoCs supporting this
> modifier.
I don't think this is suitable for modifiers. User-space relies on
being able to copy a buffer from one machine to another over the
network. It would be pretty annoying for user-space to have a blacklist
of modifiers that don't work this way.
Example of such user-space:
https://gitlab.freedesktop.org/mstoeckl/waypipe/
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Simon Ser <contact@emersion.fr>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: "mjourdan@baylibre.com" <mjourdan@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linux-amlogic@lists.infradead.org"
<linux-amlogic@lists.infradead.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 7/8] drm/fourcc: amlogic: Add modifier definitions for the Scatter layout
Date: Wed, 25 Mar 2020 09:04:09 +0000 [thread overview]
Message-ID: <JgBZ7eZYMgXRNu_-E4ItS1bud9mEe15xptZEX_XhsM_h8_iIZTOmPokEVxPJYwX0wP0pmb5p-ymubyyZP3kVbcfuDNdmM0__L8wBR5IykfE=@emersion.fr> (raw)
In-Reply-To: <20200325085025.30631-8-narmstrong@baylibre.com>
On Wednesday, March 25, 2020 9:50 AM, Neil Armstrong <narmstrong@baylibre.com> wrote:
> Amlogic uses a proprietary lossless image compression protocol and format
> for their hardware video codec accelerators, either video decoders or
> video input encoders.
>
> This introduces the Scatter Memory layout, means the header contains IOMMU
> references to the compressed frames content to optimize memory access
> and layout.
>
> In this mode, only the header memory address is needed, thus the content
> memory organization is tied to the current producer execution and cannot
> be saved/dumped neither transferrable between Amlogic SoCs supporting this
> modifier.
I don't think this is suitable for modifiers. User-space relies on
being able to copy a buffer from one machine to another over the
network. It would be pretty annoying for user-space to have a blacklist
of modifiers that don't work this way.
Example of such user-space:
https://gitlab.freedesktop.org/mstoeckl/waypipe/
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
WARNING: multiple messages have this Message-ID (diff)
From: Simon Ser <contact@emersion.fr>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: "mjourdan@baylibre.com" <mjourdan@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"daniel@ffwll.ch" <daniel@ffwll.ch>,
"linux-amlogic@lists.infradead.org"
<linux-amlogic@lists.infradead.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 7/8] drm/fourcc: amlogic: Add modifier definitions for the Scatter layout
Date: Wed, 25 Mar 2020 09:04:09 +0000 [thread overview]
Message-ID: <JgBZ7eZYMgXRNu_-E4ItS1bud9mEe15xptZEX_XhsM_h8_iIZTOmPokEVxPJYwX0wP0pmb5p-ymubyyZP3kVbcfuDNdmM0__L8wBR5IykfE=@emersion.fr> (raw)
In-Reply-To: <20200325085025.30631-8-narmstrong@baylibre.com>
On Wednesday, March 25, 2020 9:50 AM, Neil Armstrong <narmstrong@baylibre.com> wrote:
> Amlogic uses a proprietary lossless image compression protocol and format
> for their hardware video codec accelerators, either video decoders or
> video input encoders.
>
> This introduces the Scatter Memory layout, means the header contains IOMMU
> references to the compressed frames content to optimize memory access
> and layout.
>
> In this mode, only the header memory address is needed, thus the content
> memory organization is tied to the current producer execution and cannot
> be saved/dumped neither transferrable between Amlogic SoCs supporting this
> modifier.
I don't think this is suitable for modifiers. User-space relies on
being able to copy a buffer from one machine to another over the
network. It would be pretty annoying for user-space to have a blacklist
of modifiers that don't work this way.
Example of such user-space:
https://gitlab.freedesktop.org/mstoeckl/waypipe/
_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic
next prev parent reply other threads:[~2020-03-25 9:04 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 8:50 [PATCH v4 0/8] drm/meson: add support for Amlogic Video FBC Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 1/8] drm/fourcc: Add modifier definitions for describing Amlogic Video Framebuffer Compression Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 2/8] drm/meson: add Amlogic Video FBC registers Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 3/8] drm/meson: overlay: setup overlay for Amlogic FBC Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 4/8] drm/meson: crtc: handle commit of Amlogic FBC frames Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 5/8] drm/fourcc: amlogic: Add modifier definitions for Memory Saving option Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 6/8] drm/meson: overlay: setup overlay for Amlogic FBC Memory Saving mode Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 7/8] drm/fourcc: amlogic: Add modifier definitions for the Scatter layout Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 9:04 ` Simon Ser [this message]
2020-03-25 9:04 ` Simon Ser
2020-03-25 9:04 ` Simon Ser
2020-03-25 9:04 ` Simon Ser
2020-03-25 10:24 ` Neil Armstrong
2020-03-25 10:24 ` Neil Armstrong
2020-03-25 10:24 ` Neil Armstrong
2020-03-25 10:24 ` Neil Armstrong
2020-03-25 13:49 ` Pekka Paalanen
2020-03-25 13:49 ` Pekka Paalanen
2020-03-25 13:49 ` Pekka Paalanen
2020-03-25 13:49 ` Pekka Paalanen
2020-03-25 16:18 ` Neil Armstrong
2020-03-25 16:18 ` Neil Armstrong
2020-03-25 16:18 ` Neil Armstrong
2020-03-25 16:18 ` Neil Armstrong
2020-03-26 9:36 ` Pekka Paalanen
2020-03-26 9:36 ` Pekka Paalanen
2020-03-26 9:36 ` Pekka Paalanen
2020-03-26 9:36 ` Pekka Paalanen
2020-03-27 14:14 ` Neil Armstrong
2020-03-27 14:14 ` Neil Armstrong
2020-03-27 14:14 ` Neil Armstrong
2020-03-27 14:14 ` Neil Armstrong
2020-03-30 14:41 ` Pekka Paalanen
2020-03-30 14:41 ` Pekka Paalanen
2020-03-30 14:41 ` Pekka Paalanen
2020-03-30 14:41 ` Pekka Paalanen
2020-03-25 8:50 ` [PATCH v4 8/8] drm/meson: overlay: setup overlay for Amlogic FBC Scatter Memory layout Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong
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