Linux: am5728 HDMI

Hi Jiabo,

Have you checked this wiki page from TI ?
processors.wiki.ti.com/.../TI81XX_PSP_HDMI_Driver_User_Guide

The above guide may not help you directly but it will surely help you understand better about HDMI driver.
Please do share your knowing/queries for further learning.

thanks,
Prabhuraj
BlackPepper Technologies

Thank you prabhuraj tavag20 .

The wiki page you posted i have checked.But I couldn't find out the hdmi device file node in /dev/ still.

Anyone coould help me ?

thanks.

Hi Jiabo,

We can find the HDMI driver node in following way :
If the HDMI driver is loaded as module, then once the HDMI display is up, just do "lsmod" command.
Once you see HDMI driver being present, please run ls -hl /dev/* and enter. Please paste the output in a text file and share it here.


Thanks,
Prabhuraj
BlackPepper Technologies

Hi prabhuraj tavag20.

I have tryed as you point out.showing as follow:


root@am57xx-evm:~# lsmod
Module Size Used by
bc_example 7186 0
xhci_plat_hcd 5247 0
xhci_hcd 109138 1 xhci_plat_hcd
usbcore 194665 2 xhci_plat_hcd,xhci_hcd
rpmsg_proto 7597 0
rpmsg_rpc 19668 0
rpmsg_pru 4962 0
cbc 2324 0
drbg 13425 1
dwc3 64055 0
udc_core 12063 1 dwc3
virtio_rpmsg_bus 13080 3 rpmsg_pru,rpmsg_rpc,rpmsg_proto
bluetooth 325678 2
xfrm_user 23228 2
xfrm4_tunnel 2040 0
ipcomp 2473 0
xfrm_ipcomp 4695 1 ipcomp
esp4 6465 0
ah4 5665 0
af_key 27563 0
xfrm_algo 6970 5 ah4,esp4,af_key,xfrm_user,xfrm_ipcomp
pru_rproc 11732 4
pruss_intc 7227 5 pru_rproc
ecb 1909 0
snd_soc_simple_card 7760 0
snd_soc_omap_hdmi_audio 4737 0
sha512_generic 9903 0
sha512_arm 12079 0
ti_vip 39918 0
sha256_generic 9503 1
ahci_platform 3218 0
libahci_platform 8821 1 ahci_platform
libahci 27891 2 libahci_platform,ahci_platform
pvrsrvkm 412372 5 bc_example
libata 196388 3 libahci,libahci_platform,ahci_platform
hmac 2735 1
md5 1897 0
sha1_generic 2621 0
sha1_arm_neon 6261 0
sha1_arm 3862 1 sha1_arm_neon
omap_aes_driver 19230 0
pruss 11186 1 pru_rproc
omap_sham 21089 0
scsi_mod 129717 1 libata
ti_vpe 19292 0
omap_wdt 4570 0
ti_sc 24714 2 ti_vip,ti_vpe
ti_csc 2313 2 ti_vip,ti_vpe
ti_vpdma 15166 2 ti_vip,ti_vpe
dwc3_omap 5054 0
snd_soc_tlv320aic3x 48260 1
mt9t11x 14769 0
extcon_palmas 6347 0
extcon 13943 3 dwc3,extcon_palmas,dwc3_omap
rtc_palmas 5187 0
rtc_omap 8272 0
omap_des 11446 0
pixcir_i2c_ts 6570 0
omap_rng 4835 0
rng_core 8011 1 omap_rng
rtc_ds1307 11278 0
debugss_kmodule 6848 0
omap_remoteproc 12389 4
remoteproc 27121 5 omap_remoteproc,pruss,pru_rproc,rpmsg_rpc,rpmsg_proto
virtio 7580 2 remoteproc,virtio_rpmsg_bus
virtio_ring 12291 2 remoteproc,virtio_rpmsg_bus
sch_fq_codel 8251 3
uio_module_drv 7353 0
uio 9329 1 uio_module_drv
gdbserverproxy 4671 0
cryptodev 37405 2
cmemk 35174 2
root@am57xx-evm:~# ls -hl /dev/*
crw------- 1 root root 10, 235 Jul 18 14:19 /dev/autofs
crw-rw-rw- 1 root root 241, 0 Jul 18 14:20 /dev/bc_example
crw------- 1 root root 245, 0 Jul 18 14:19 /dev/cmem
crw------- 1 root root 5, 1 Jul 18 14:20 /dev/console
crw------- 1 root root 10, 62 Jul 18 14:19 /dev/cpu_dma_latency
crw-rw-rw- 1 root root 10, 57 Jul 18 14:19 /dev/crypto
crw------- 1 root root 242, 1 Jul 18 14:19 /dev/dce-callback
crw------- 1 root root 10, 56 Jul 18 14:19 /dev/debugss
lrwxrwxrwx 1 root root 3 Jul 18 14:19 /dev/fb -> fb0
crw-rw---- 1 root video 29, 0 Jul 18 14:19 /dev/fb0
lrwxrwxrwx 1 root root 13 Mar 30 00:56 /dev/fd -> /proc/self/fd
crw-rw-rw- 1 root root 1, 7 Jul 18 14:19 /dev/full
crw------- 1 root root 240, 0 Jul 18 14:20 /dev/gdbtty0
crw------- 1 root root 240, 1 Jul 18 14:20 /dev/gdbtty1
crw------- 1 root root 10, 183 Jul 18 14:19 /dev/hwrng
crw------- 1 root root 89, 0 Mar 30 00:56 /dev/i2c-0
crw------- 1 root root 89, 2 Mar 30 00:56 /dev/i2c-2
crw------- 1 root root 89, 4 Mar 30 00:56 /dev/i2c-4
lrwxrwxrwx 1 root root 25 Mar 30 00:56 /dev/initctl -> /run/systemd/initctl/fifo
crw-r----- 1 root kmem 1, 2 Jul 18 14:19 /dev/kmem
crw-r--r-- 1 root root 1, 11 Jul 18 14:19 /dev/kmsg
lrwxrwxrwx 1 root root 28 Mar 30 00:56 /dev/log -> /run/systemd/journal/dev-log
crw-rw---- 1 root disk 10, 237 Jul 18 14:19 /dev/loop-control
brw-rw---- 1 root disk 7, 0 Jul 18 14:19 /dev/loop0
brw-rw---- 1 root disk 7, 1 Jul 18 14:19 /dev/loop1
brw-rw---- 1 root disk 7, 2 Jul 18 14:19 /dev/loop2
brw-rw---- 1 root disk 7, 3 Jul 18 14:19 /dev/loop3
brw-rw---- 1 root disk 7, 4 Jul 18 14:19 /dev/loop4
brw-rw---- 1 root disk 7, 5 Jul 18 14:19 /dev/loop5
brw-rw---- 1 root disk 7, 6 Jul 18 14:19 /dev/loop6
brw-rw---- 1 root disk 7, 7 Jul 18 14:19 /dev/loop7
crw-r----- 1 root kmem 1, 1 Jul 18 14:19 /dev/mem
crw------- 1 root root 10, 59 Jul 18 14:19 /dev/memory_bandwidth
brw-rw---- 1 root disk 179, 0 Mar 30 00:56 /dev/mmcblk0
brw-rw---- 1 root disk 179, 1 Jul 18 14:19 /dev/mmcblk0p1
brw-rw---- 1 root disk 179, 2 Jul 18 14:19 /dev/mmcblk0p2
brw-rw---- 1 root disk 179, 16 Mar 30 00:56 /dev/mmcblk1
brw-rw---- 1 root disk 179, 32 Jul 18 14:19 /dev/mmcblk1boot0
brw-rw---- 1 root disk 179, 48 Jul 18 14:19 /dev/mmcblk1boot1
brw-rw---- 1 root disk 179, 17 Jul 18 14:19 /dev/mmcblk1p1
brw-rw---- 1 root disk 179, 18 Jul 18 14:19 /dev/mmcblk1p2
crw------- 1 root root 10, 61 Jul 18 14:19 /dev/network_latency
crw------- 1 root root 10, 60 Jul 18 14:19 /dev/network_throughput
crw-rw-rw- 1 root root 1, 3 Jul 18 14:19 /dev/null
crw-r----- 1 root kmem 1, 4 Jul 18 14:19 /dev/port
crw------- 1 root root 10, 1 Jul 18 14:19 /dev/psaux
crw-rw-rw- 1 root tty 5, 2 Jul 18 14:19 /dev/ptmx
crw------- 1 root root 251, 0 Jul 18 14:19 /dev/ptp0
crw------- 1 root root 2, 176 Jul 18 14:19 /dev/ptya0
......
crw------- 1 root root 2, 255 Jul 18 14:19 /dev/ptyef
crw------- 1 root root 2, 0 Jul 18 14:19 /dev/ptyp0
crw------- 1 root root 2, 175 Jul 18 14:19 /dev/ptyzf
crw-rw-rw- 1 root root 1, 8 Jul 18 14:19 /dev/random
crw-rw-r-- 1 root root 10, 63 Jul 18 14:19 /dev/rfkill
crw------- 1 root root 242, 0 Jul 18 14:19 /dev/rpc_example_2
crw------- 1 root root 242, 2 Jul 18 14:19 /dev/rpmsg-dce
crw------- 1 root root 243, 0 Jul 18 14:19 /dev/rpmsg_pru30
crw------- 1 root root 243, 1 Jul 18 14:19 /dev/rpmsg_pru31
crw------- 1 root root 243, 2 Jul 18 14:19 /dev/rpmsg_pru32
crw------- 1 root root 243, 3 Jul 18 14:19 /dev/rpmsg_pru33
lrwxrwxrwx 1 root root 4 Jul 18 14:19 /dev/rtc -> rtc0
crw------- 1 root root 254, 0 Jul 18 14:19 /dev/rtc0
crw------- 1 root root 254, 1 Jul 18 14:19 /dev/rtc1
crw------- 1 root root 254, 2 Jul 18 14:19 /dev/rtc2
lrwxrwxrwx 1 root root 15 Mar 30 00:56 /dev/stderr -> /proc/self/fd/2
lrwxrwxrwx 1 root root 15 Mar 30 00:56 /dev/stdin -> /proc/self/fd/0
lrwxrwxrwx 1 root root 15 Mar 30 00:56 /dev/stdout -> /proc/self/fd/1
crw-rw-rw- 1 root tty 5, 0 Jul 18 14:19 /dev/tty
crw--w---- 1 root tty 4, 0 Jul 18 14:19 /dev/tty0
......
crw------- 1 root root 3, 175 Jul 18 14:19 /dev/ttyzf

crw------- 1 root root 10, 58 Jul 18 14:19 /dev/ubi_ctrl
-rw-r--r-- 1 root root 18 Jul 18 14:19 /dev/udev_network_queue
crw-rw-rw- 1 root root 1, 9 Jul 18 14:19 /dev/urandom
crw-rw---- 1 root tty 7, 0 Jul 18 14:19 /dev/vcs
crw-rw---- 1 root tty 7, 1 Jul 18 14:19 /dev/vcs1
crw-rw---- 1 root tty 7, 2 Jul 18 14:19 /dev/vcs2
crw-rw---- 1 root tty 7, 3 Jul 18 14:19 /dev/vcs3
crw-rw---- 1 root tty 7, 4 Jul 18 14:19 /dev/vcs4
crw-rw---- 1 root tty 7, 5 Jul 18 14:19 /dev/vcs5
crw-rw---- 1 root tty 7, 6 Jul 18 14:19 /dev/vcs6
crw-rw---- 1 root tty 7, 128 Jul 18 14:19 /dev/vcsa
crw-rw---- 1 root tty 7, 129 Jul 18 14:19 /dev/vcsa1
crw-rw---- 1 root tty 7, 130 Jul 18 14:19 /dev/vcsa2
crw-rw---- 1 root tty 7, 131 Jul 18 14:19 /dev/vcsa3
crw-rw---- 1 root tty 7, 132 Jul 18 14:19 /dev/vcsa4
crw-rw---- 1 root tty 7, 133 Jul 18 14:19 /dev/vcsa5
crw-rw---- 1 root tty 7, 134 Jul 18 14:19 /dev/vcsa6
crw-rw---- 1 root video 81, 2 Jul 18 14:19 /dev/video0
crw-rw---- 1 root video 81, 1 Jul 18 14:19 /dev/video10
crw-rw---- 1 root video 81, 0 Jul 18 14:19 /dev/video11
crw------- 1 root root 10, 130 Jul 18 14:19 /dev/watchdog
crw------- 1 root root 248, 0 Jul 18 14:19 /dev/watchdog0
crw-rw-rw- 1 root root 1, 5 Jul 18 14:19 /dev/zero

/dev/block:
lrwxrwxrwx 1 root root 10 Mar 30 00:56 179:0 -> ../mmcblk0
lrwxrwxrwx 1 root root 12 Jul 18 14:19 179:1 -> ../mmcblk0p1
lrwxrwxrwx 1 root root 10 Mar 30 00:56 179:16 -> ../mmcblk1
lrwxrwxrwx 1 root root 12 Jul 18 14:19 179:17 -> ../mmcblk1p1
lrwxrwxrwx 1 root root 12 Jul 18 14:19 179:18 -> ../mmcblk1p2
lrwxrwxrwx 1 root root 12 Jul 18 14:19 179:2 -> ../mmcblk0p2
lrwxrwxrwx 1 root root 15 Jul 18 14:19 179:32 -> ../mmcblk1boot0
lrwxrwxrwx 1 root root 15 Jul 18 14:19 179:48 -> ../mmcblk1boot1
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:0 -> ../loop0
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:1 -> ../loop1
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:2 -> ../loop2
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:3 -> ../loop3
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:4 -> ../loop4
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:5 -> ../loop5
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:6 -> ../loop6
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:7 -> ../loop7

/dev/bus:
drwxr-xr-x 4 root root 80 Jul 18 14:19 usb

/dev/char:
lrwxrwxrwx 1 root root 8 Jul 18 14:19 10:1 -> ../psaux
lrwxrwxrwx 1 root root 11 Jul 18 14:19 10:130 -> ../watchdog
lrwxrwxrwx 1 root root 8 Jul 18 14:19 10:183 -> ../hwrng
lrwxrwxrwx 1 root root 9 Jul 18 14:19 10:235 -> ../autofs
lrwxrwxrwx 1 root root 15 Jul 18 14:19 10:237 -> ../loop-control
lrwxrwxrwx 1 root root 10 Jul 18 14:19 10:56 -> ../debugss
lrwxrwxrwx 1 root root 9 Jul 18 14:19 10:57 -> ../crypto
lrwxrwxrwx 1 root root 11 Jul 18 14:19 10:58 -> ../ubi_ctrl
lrwxrwxrwx 1 root root 19 Jul 18 14:19 10:59 -> ../memory_bandwidth
lrwxrwxrwx 1 root root 21 Jul 18 14:19 10:60 -> ../network_throughput
lrwxrwxrwx 1 root root 18 Jul 18 14:19 10:61 -> ../network_latency
lrwxrwxrwx 1 root root 18 Jul 18 14:19 10:62 -> ../cpu_dma_latency
lrwxrwxrwx 1 root root 9 Jul 18 14:19 10:63 -> ../rfkill
lrwxrwxrwx 1 root root 16 Jul 18 14:19 116:2 -> ../snd/controlC1
lrwxrwxrwx 1 root root 15 Jul 18 14:19 116:3 -> ../snd/pcmC1D0p
lrwxrwxrwx 1 root root 12 Jul 18 14:19 116:33 -> ../snd/timer
lrwxrwxrwx 1 root root 16 Jul 18 14:19 116:4 -> ../snd/controlC0
lrwxrwxrwx 1 root root 15 Jul 18 14:19 116:5 -> ../snd/pcmC0D0p
lrwxrwxrwx 1 root root 15 Jul 18 14:19 116:6 -> ../snd/pcmC0D0c
lrwxrwxrwx 1 root root 15 Jul 18 14:19 13:32 -> ../input/mouse0
lrwxrwxrwx 1 root root 13 Jul 18 14:19 13:63 -> ../input/mice
lrwxrwxrwx 1 root root 15 Jul 18 14:19 13:64 -> ../input/event0
lrwxrwxrwx 1 root root 15 Jul 18 14:19 13:65 -> ../input/event1
lrwxrwxrwx 1 root root 18 Jul 18 14:19 189:0 -> ../bus/usb/001/001
lrwxrwxrwx 1 root root 18 Jul 18 14:19 189:1 -> ../bus/usb/001/002
lrwxrwxrwx 1 root root 18 Jul 18 14:19 189:128 -> ../bus/usb/002/001
lrwxrwxrwx 1 root root 18 Jul 18 14:19 189:129 -> ../bus/usb/002/002
lrwxrwxrwx 1 root root 6 Jul 18 14:19 1:1 -> ../mem
lrwxrwxrwx 1 root root 7 Jul 18 14:19 1:11 -> ../kmsg
lrwxrwxrwx 1 root root 7 Jul 18 14:19 1:2 -> ../kmem
lrwxrwxrwx 1 root root 7 Jul 18 14:19 1:3 -> ../null
lrwxrwxrwx 1 root root 7 Jul 18 14:19 1:4 -> ../port
lrwxrwxrwx 1 root root 7 Jul 18 14:19 1:5 -> ../zero
lrwxrwxrwx 1 root root 7 Jul 18 14:19 1:7 -> ../full
lrwxrwxrwx 1 root root 9 Jul 18 14:19 1:8 -> ../random
lrwxrwxrwx 1 root root 10 Jul 18 14:19 1:9 -> ../urandom
lrwxrwxrwx 1 root root 12 Jul 18 14:20 226:0 -> ../dri/card0
lrwxrwxrwx 1 root root 12 Jul 18 14:19 226:1 -> ../dri/card1
lrwxrwxrwx 1 root root 17 Jul 18 14:19 226:128 -> ../dri/renderD128
lrwxrwxrwx 1 root root 17 Jul 18 14:19 226:129 -> ../dri/renderD129
lrwxrwxrwx 1 root root 17 Jul 18 14:19 226:64 -> ../dri/controlD64
lrwxrwxrwx 1 root root 10 Jul 18 14:19 240:0 -> ../gdbtty0
lrwxrwxrwx 1 root root 10 Jul 18 14:19 240:1 -> ../gdbtty1
lrwxrwxrwx 1 root root 13 Jul 18 14:20 241:0 -> ../bc_example
lrwxrwxrwx 1 root root 16 Jul 18 14:19 242:0 -> ../rpc_example_2
lrwxrwxrwx 1 root root 15 Jul 18 14:19 242:1 -> ../dce-callback
lrwxrwxrwx 1 root root 12 Jul 18 14:19 242:2 -> ../rpmsg-dce
lrwxrwxrwx 1 root root 14 Jul 18 14:19 243:0 -> ../rpmsg_pru30
lrwxrwxrwx 1 root root 14 Jul 18 14:19 243:1 -> ../rpmsg_pru31
lrwxrwxrwx 1 root root 14 Jul 18 14:19 243:2 -> ../rpmsg_pru32
lrwxrwxrwx 1 root root 14 Jul 18 14:19 243:3 -> ../rpmsg_pru33
lrwxrwxrwx 1 root root 7 Jul 18 14:19 245:0 -> ../cmem
lrwxrwxrwx 1 root root 12 Jul 18 14:19 248:0 -> ../watchdog0
lrwxrwxrwx 1 root root 7 Jul 18 14:19 251:0 -> ../ptp0
lrwxrwxrwx 1 root root 7 Jul 18 14:19 254:0 -> ../rtc0
lrwxrwxrwx 1 root root 7 Jul 18 14:19 254:1 -> ../rtc1
lrwxrwxrwx 1 root root 7 Jul 18 14:19 254:2 -> ../rtc2
lrwxrwxrwx 1 root root 6 Jul 18 14:19 29:0 -> ../fb0
lrwxrwxrwx 1 root root 8 Jul 18 14:19 2:0 -> ../ptyp0
lrwxrwxrwx 1 root root 8 Jul 18 14:19 2:1 -> ../ptyp1
lrwxrwxrwx 1 root root 8 Jul 18 14:19 2:10 -> ../ptypa
......
lrwxrwxrwx 1 root root 6 Jul 18 14:19 5:0 -> ../tty
lrwxrwxrwx 1 root root 10 Jul 18 14:19 5:1 -> ../console
lrwxrwxrwx 1 root root 7 Jul 18 14:19 5:2 -> ../ptmx
lrwxrwxrwx 1 root root 6 Jul 18 14:19 7:0 -> ../vcs
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:1 -> ../vcs1
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:128 -> ../vcsa
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:129 -> ../vcsa1
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:130 -> ../vcsa2
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:131 -> ../vcsa3
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:132 -> ../vcsa4
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:133 -> ../vcsa5
lrwxrwxrwx 1 root root 8 Jul 18 14:19 7:134 -> ../vcsa6
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:2 -> ../vcs2
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:3 -> ../vcs3
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:4 -> ../vcs4
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:5 -> ../vcs5
lrwxrwxrwx 1 root root 7 Jul 18 14:19 7:6 -> ../vcs6
lrwxrwxrwx 1 root root 10 Jul 18 14:19 81:0 -> ../video11
lrwxrwxrwx 1 root root 10 Jul 18 14:19 81:1 -> ../video10
lrwxrwxrwx 1 root root 9 Jul 18 14:19 81:2 -> ../video0
lrwxrwxrwx 1 root root 8 Mar 30 00:56 89:0 -> ../i2c-0
lrwxrwxrwx 1 root root 8 Mar 30 00:56 89:2 -> ../i2c-2
lrwxrwxrwx 1 root root 8 Mar 30 00:56 89:4 -> ../i2c-4

/dev/disk:
drwxr-xr-x 2 root root 160 Jul 18 14:19 by-id
drwxr-xr-x 2 root root 80 Jul 18 14:19 by-label
drwxr-xr-x 2 root root 160 Jul 18 14:19 by-path
drwxr-xr-x 2 root root 120 Jul 18 14:19 by-uuid

/dev/dri:
crw-rw---- 1 root video 226, 0 Jul 18 14:20 card0
crw-rw---- 1 root video 226, 1 Jul 18 14:19 card1
crw-rw---- 1 root video 226, 64 Jul 18 14:19 controlD64
crw-rw---- 1 root video 226, 128 Jul 18 14:19 renderD128
crw-rw---- 1 root video 226, 129 Jul 18 14:19 renderD129

/dev/input:
drwxr-xr-x 2 root root 80 Jul 18 14:19 by-path
crw-rw---- 1 root input 13, 64 Jul 18 14:19 event0
crw-rw---- 1 root input 13, 65 Jul 18 14:19 event1
crw-rw---- 1 root input 13, 63 Jul 18 14:19 mice
crw-rw---- 1 root input 13, 32 Jul 18 14:19 mouse0
lrwxrwxrwx 1 root root 6 Jul 18 14:19 touchscreen0 -> event1

/dev/mqueue:

/dev/pts:
c--------- 1 root root 5, 2 Jan 1 1970 ptmx

/dev/shm:
-rw-r--r-- 1 root root 128.0K Jul 18 14:19 HeapManager

/dev/snd:
drwxr-xr-x 2 root root 80 Jul 18 14:19 by-path
crw-rw---- 1 root audio 116, 4 Jul 18 14:19 controlC0
crw-rw---- 1 root audio 116, 2 Jul 18 14:19 controlC1
crw-rw---- 1 root audio 116, 6 Jul 18 14:19 pcmC0D0c
crw-rw---- 1 root audio 116, 5 Jul 18 14:19 pcmC0D0p
crw-rw---- 1 root audio 116, 3 Jul 18 14:19 pcmC1D0p
crw-rw---- 1 root audio 116, 33 Jul 18 14:19 timer

/dev/v4l:
drwxr-xr-x 2 root root 80 Jul 18 14:19 by-path
root@am57xx-evm:~#

Could you find out anything to solve the problem ?

Thanks!

Hi Jiabo,

Thanks for sharing the details. After going through your logs and AM572x display subsystem, what I have understood is that HDMI is controlled by DSS (display subsystem) which is exposed as omapdrm linux driver. So, you cannot find a separate HDMI driver being loaded.
As per the wiki pages, please try to open and control /dev/dri/card0 or card1 (just experiment and check) to manipulate HDMI display.
You can also go through omapdrm test code to verify and understand better.

Have a look at the wiki pages which will give you better insight :

processors.wiki.ti.com/.../Linux_Core_DSS_User's_Guide
processors.wiki.ti.com/.../Processor_Linux_SDK_Graphics_and_Display
processors.wiki.ti.com/.../Processor_SDK_VIP_Driver
git.ti.com/.../master
processors.wiki.ti.com/.../Linux_Core_DSS_User's_Guide

I hope this information helps and I could give you details you were looking for. Please share your knowing/learning for further discussion.

thanks,
Prabhuraj
BlackPepper Technologies

Thanks.prabhuraj tavag20.

I have checked the pages your posted.But i donn't have any ideas to solve the problem.

HDMI module is the new to me. I think i can do best if you give me some demos or point out how to solve my problem.

and do you have any other consumer using the HDMI?

Thank you.

Hi Jiabo,

I provided you the HDMI device file info based on your requirements.
You can refer the code from git.ti.com/.../master which gives you pointers to test HDMI and understand from application perspective. You have already used this code as commands like "kmscube"

If you can elaborate on what exactly you are trying to do with HDMI, we can look into it.
a) Are you looking to modify HDMI for your custom board needs?
b) Are you trying to utilize HDMI display to draw UI application?

Let me know.

Thanks,
Prabhuraj
BlackPepper Technologies

Hi,prabhuraj tavag20

I cann't open the link you posted.

could you upload the codes here?

I should answer the qestions you want to know;

first, HDMI device problem was occuerd on the sdk board buyed from TI.

second,transmitting data is arm to solve the ethcat project problem and the data is not the graphic.





Thank you.

Hi Jiabo,

Please refer below link for omapdrm tests. I don't have a AM572x board so I can't test. Please cross compile and test at your set up and let me know the results. If you refer the the code, you can also find the details about the device file being used for display.

github.com/.../omapdrmtest

Thanks,
Prabhuraj
BlackPepper Technologies

Hi,prabhuraj tavag20;

I have downloaded the codes lined with github.com/.../omapdrmtest.

But i cann't compile right,ocuuring the wrong message:

fatal error : libdce.h No such file or directory;

How could i solve the probelm?

Thank you.