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Commit 3e7f51bd authored by Maxime Jourdan's avatar Maxime Jourdan Committed by Mauro Carvalho Chehab
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media: meson: add v4l2 m2m video decoder driver 



Amlogic SoCs feature a powerful video decoder unit able to
decode many formats, with a performance of usually up to 4k60.

This is a driver for this IP that is based around the v4l2 m2m framework.

It features decoding for:
- MPEG 1
- MPEG 2

Supported SoCs are: GXBB (S905), GXL (S905X/W/D), GXM (S912)

There is also a hardware bitstream parser (ESPARSER) that is handled here.

Signed-off-by: default avatarMaxime Jourdan <mjourdan@baylibre.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent a1ccca0e

drivers/staging/media/Kconfig

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@@ -28,6 +28,8 @@ source "drivers/staging/media/davinci_vpfe/Kconfig" 


source "drivers/staging/media/imx/Kconfig"



source "drivers/staging/media/meson/vdec/Kconfig"



source "drivers/staging/media/omap4iss/Kconfig"



source "drivers/staging/media/rockchip/vpu/Kconfig"

drivers/staging/media/Makefile

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@@ -3,6 +3,7 @@ obj-$(CONFIG_VIDEO_ALLEGRO_DVT) += allegro-dvt/ 
obj-$(CONFIG_I2C_BCM2048)	+= bcm2048/

obj-$(CONFIG_VIDEO_IMX_MEDIA)	+= imx/

obj-$(CONFIG_VIDEO_DM365_VPFE)	+= davinci_vpfe/

obj-$(CONFIG_VIDEO_MESON_VDEC)	+= meson/vdec/

obj-$(CONFIG_VIDEO_OMAP4)	+= omap4iss/

obj-$(CONFIG_VIDEO_SUNXI)	+= sunxi/

obj-$(CONFIG_TEGRA_VDE)		+= tegra-vde/

drivers/staging/media/meson/vdec/Kconfig

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# SPDX-License-Identifier: GPL-2.0



config VIDEO_MESON_VDEC

	tristate "Amlogic video decoder driver"

	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA

	depends on ARCH_MESON || COMPILE_TEST

	select VIDEOBUF2_DMA_CONTIG

	select V4L2_MEM2MEM_DEV

	select MESON_CANVAS

	help

	Support for the video decoder found in gxbb/gxl/gxm chips.

drivers/staging/media/meson/vdec/Makefile

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# SPDX-License-Identifier: GPL-2.0

# Makefile for Amlogic meson video decoder driver



meson-vdec-objs = esparser.o vdec.o vdec_helpers.o vdec_platform.o

meson-vdec-objs += vdec_1.o

meson-vdec-objs += codec_mpeg12.o



obj-$(CONFIG_VIDEO_MESON_VDEC) += meson-vdec.o

drivers/staging/media/meson/vdec/TODO

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This driver is in staging until the V4L2 documentation about stateful video

decoders is finalized, as well as the corresponding compliance tests.



It is at the moment not guaranteed to work properly with a userspace

stack that follows the latest version of the specification, especially

with compression standards like MPEG1/2 where the driver does not support

dynamic resolution switching, including the first one used to determine coded

resolution.