I installed Android to sd and it boots, but there’s no display output at all.
Not on the 7", not on my 1080p and not on my 4K.
I connected the debug UART and it mentions HDMI failed to get EDID.
In attachment the full output.
Here the part about HDMI :
ensure_path_mounted path=/cache/recovery/command
E:[libfs_mgr]Failed to open '/dev/block/by-name/cache': No such file or directory
I:[libfs_mgr]__mount(source=/dev/block/by-name/cache(missing),target=/cache,type=ext4)=-1: No such file or directory
E:[libfs_mgr]Failed to mount /cache: No such file or directory
E:[libfs_mgr]Failed to mount for path [/cache/recovery/command]
ensure_path_mounted path=/cache/recovery/last_locale
E:[libfs_mgr]Failed to open '/dev/block/by-name/cache': No such file or directory
I:[libfs_mgr]__mount(source=/dev/block/by-name/cache(missing),target=/cache,type=ext4)=-1: No such file or directory
libc: Unable to set property "ro.boottime.init.mount.cache" to "0": error code: 0xb
E:[libfs_mgr]Failed to mount /cache: No such file or directory
E:[libfs_mgr]Failed to mount for path [/cache/recovery/last_locale]
E:Can't mount /cache/recovery/last_locale
Loading make_device from librecovery_ui_ext.so
W:Failed to read max brightness: No such file or directory
I:Screensaver disabled
[ 9.620008][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 9.723297][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 9.826602][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 9.930126][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.033402][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.136797][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.136893][ T196] dwhdmi-rockchip fde80000.hdmi: get hdcp2.x capable failed:-11
[ 10.137045][ T196] dwhdmi-rockchip fde80000.hdmi: failed to get edid
[ 10.240158][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.343466][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.446791][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.550127][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.653461][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.756794][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.756884][ T196] dwhdmi-rockchip fde80000.hdmi: get hdcp2.x capable failed:-11
[ 10.756972][ T196] dwhdmi-rockchip fde80000.hdmi: failed to get edid
[ 10.860120][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 10.963456][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.066794][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.170125][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.273583][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.376791][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.376902][ T196] dwhdmi-rockchip fde80000.hdmi: get hdcp2.x capable failed:-11
[ 11.377051][ T196] dwhdmi-rockchip fde80000.hdmi: failed to get edid
[ 11.480121][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.583458][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.686792][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.790126][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.893460][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.996794][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 11.996904][ T196] dwhdmi-rockchip fde80000.hdmi: get hdcp2.x capable failed:-11
[ 11.997054][ T196] dwhdmi-rockchip fde80000.hdmi: failed to get edid
[ 12.100125][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.203567][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.306786][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.410116][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.513451][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.616790][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.616900][ T196] dwhdmi-rockchip fde80000.hdmi: get hdcp2.x capable failed:-11
Display Mode 0 resolution: 1024 x 600 @ 60 FPS
[ 12.617032][ T196] dwhdmi-rockchip fde80000.hdmi: failed to get edid
Choosing display mode #0
Display Mode 0 resolution: 1920 x 1080 @ 60 FPS
Choosing display mode #0
Allocating buffer with resolution 1024 x 600 pitch: 4096 bpp: 32, size: 2457600
Framebuffer of size 2457600 allocated @ 0x7b32794000
Allocating buffer with resolution 1024 x 600 pitch: 4096 bpp: 32, size: 2457600
Framebuffer of size 2457600 allocated @ 0x7b3253c000
Allocating buffer with resolution 1920 x 1080 pitch: 7680 bpp: 32, size: 8294400
Framebuffer of size 8294400 allocated @ 0x7b31d53000
Allocating buffer with resolution 1920 x 1080 pitch: 7680 bpp: 32, size: 8294400
Framebuffer of size 8294400 allocated @ 0x7b3156a000
[ 12.780140][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.883461][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 12.986790][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 13.090167][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 13.193461][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 13.296795][ T196] dwhdmi-rockchip fde80000.hdmi: i2c read time out!
[ 13.296876][ T196] dwhdmi-rockchip fde80000.hdmi: get hdcp2.x capable failed:-11
[ 13.296953][ T196] dwhdmi-rockchip fde80000.hdmi: failed to get edid
erasing_text: en (47 x 19 @ 700)
no_command_text: en (83 x 19 @ 700)
error_text: en (33 x 19 @ 700)
W:Failed to load bitmap cancel_wipe_data_text for locale en-US (error -1). Falling back to use default locale.
E:Failed to load bitmap cancel_wipe_data_text for locale en-US (error -1)
W:Failed to load bitmap factory_data_reset_text for locale en-US (error -1). Falling back to use default locale.
E:Failed to load bitmap factory_data_reset_text for locale en-US (error -1)
W:Failed to load bitmap try_again_text for locale en-US (error -1). Falling back to use default locale.
E:Failed to load bitmap try_again_text for locale en-US (error -1)
W:Failed to load bitmap wipe_data_confirmation_text for locale en-US (error -1). Falling back to use default locale.
E:Failed to load bitmap wipe_data_confirmation_text for locale en-US (error -1)
W:Failed to load bitmap wipe_data_menu_header_text for locale en-US (error -1). Falling back to use default locale.
E:Failed to load bitmap wipe_data_menu_header_text for locale en-US (error -1)
I:Starting recovery (pid 196) on Fri Jan 1 12:00:02 2021