video.md

Asus Chromebook c100 flip veyron - linux 5.x video hardware drivers with mainline kernel

Official specs
• Quad-core ARM Mali-T760 MP4 GPU
• clocked at 650 MHz
• supporting OpenGL ES 1.1/2.0/3.0/3.1
• OpenCL 1.1
• Renderscript
• Direct3D 11.1
• 1080P video encoding for H.264 and VP8, MVC
• 4K H.264 and 10bits H.265 video decode, 1080P multi video decode (MPP)
• Supports 4Kx2K H.265 resolution
• Up to 3840x2160 display output, HDMI 2.0

Video components status

feature	rockchip name / kernel driver	kernel status	userspace driver	userspace status
Internal display 1280x800	VOP: panfrost,	OK	x11/wayland ?	?
2D acceleration	RGA2	OK	V4L2 ?	?
3D acceleration	panfrost kernel driver kmssink etc mali-midgard dkms(legacy)	OK	mesa (buggy)	?
video acceleration (x264,hevc etc..)	Rockchip VDEC(rkvdec)-4K h264 dec only / Hantro H1 co-dec	OK	vaapi / V4L2	?
HDMI video out	?	?	?	?
HDMI cec	?	?	?	?
rk video enhancement	IEP	?	?	?

Kernel config

Panfrost Mali driver (3D acceleration only)

CONFIG_DRM_ROCKCHIP
CONFIG_DRM_DW_HDMI_CEC

RGA/RGA2 (2D acceleration)

CONFIG_VIDEO_ROCKCHIP_RGA

h264/hevc codec / hantro codec

CONFIG_RK_VCODEC --> CONFIG_VIDEO_ROCKCHIP_VDEC (rockchip kernel?) CONFIG_STAGING
CONFIG_STAGING_MEDIA
CONFIG_VIDEO_HANTRO
CONFIG_VIDEO_HANTRO_ROCKCHIP

rkvdec.ko drivers/staging/ rockchip-vdec.ko

Test

panfrost ffa30000.gpu: clock rate = 400000000
panfrost ffa30000.gpu: [drm:panfrost_devfreq_init] *ERROR* Couldn't set OPP regulators
panfrost ffa30000.gpu: clock rate = 400000000
panfrost ffa30000.gpu: mali-t760 id 0x750 major 0x0 minor 0x0 status 0x1
panfrost ffa30000.gpu: features: 00000000,100277bf, issues: 00000000,24040400
panfrost ffa30000.gpu: Features: L2:0x07120206 Shader:0x00000000 Tiler:0x00000809 Mem:0x1 MMU:0x00002830 AS:0xff JS:0x7
panfrost ffa30000.gpu: shader_present=0xf l2_present=0x1
[drm] Initialized panfrost 1.1.0 20180908 for ffa30000.gpu on minor 2


dwhdmi-rockchip ff980000.hdmi: Detected HDMI TX controller v2.00a with HDCP (DWC MHL PHY)
dwhdmi-rockchip ff980000.hdmi: registered DesignWare HDMI I2C bus driver
rockchip-drm display-subsystem: bound ff980000.hdmi (ops 0xc0c42f4c)

userland libraries / kernel connectors

libdrm - not needed mesa kms -?

userland test apps

v4l2: ffmpeg configure: --enable-rkmpp ffmpeg -hwaccels /sys/class/video4linux

vdpau:
https://github.com/wzyy2/libvdpau-rockchip X11-dev,rkdec-264d, drm-dev
https://gitlab.freedesktop.org/vdpau/libvdpau/-/tree/master (generic)

va-api(wayland): https://github.com/hizukiayaka/rockchip-video-driver

mpp: full hd, no 4k

kmssink: gstreamer 1.19

glx(wayland): /usr/lib//libEGL..

cec-utils, vainfo,

$ vainfo
libva info: VA-API version 1.1.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exit

v4l-cec

cec-client -l