Part Number: TDA4VM
Other Parts Discussed in Thread: TFP410
Hi experts,
I am trying to control dss on Linux A72 side on our customer board, and display by HDMI.
run modetest command :
root@j7-evm:~# modetest -M tidss -c
Connectors:
id encoder status name size (mm) modes encoders
39 38 unknown HDMI-A-1 0x0 25 38
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
#0 1024x768 60.00 1024 1048 1184 1344 768 771 777 806 65000 flags: nhsync, nvsync; type: preferred, driver
#1 1920x1200 59.95 1920 1968 2000 2080 1200 1203 1209 1235 154000 flags: phsync, nvsync; type: driver
#2 1920x1080 60.00 1920 2008 2052 2200 1080 1084 1089 1125 148500 flags: nhsync, nvsync; type: driver
#3 1600x1200 60.00 1600 1664 1856 2160 1200 1201 1204 1250 162000 flags: phsync, pvsync; type: driver
#4 1680x1050 59.95 1680 1784 1960 2240 1050 1053 1059 1089 146250 flags: nhsync, pvsync; type: driver
#5 1680x1050 59.88 1680 1728 1760 1840 1050 1053 1059 1080 119000 flags: phsync, nvsync; type: driver
#6 1400x1050 59.98 1400 1488 1632 1864 1050 1053 1057 1089 121750 flags: nhsync, pvsync; type: driver
#7 1400x1050 59.95 1400 1448 1480 1560 1050 1053 1057 1080 101000 flags: phsync, nvsync; type: driver
#8 1600x900 60.00 1600 1624 1704 1800 900 901 904 1000 108000 flags: phsync, pvsync; type: driver
#9 1280x1024 60.02 1280 1328 1440 1688 1024 1025 1028 1066 108000 flags: phsync, pvsync; type: driver
#10 1440x900 59.89 1440 1520 1672 1904 900 903 909 934 106500 flags: nhsync, pvsync; type: driver
#11 1440x900 59.90 1440 1488 1520 1600 900 903 909 926 88750 flags: phsync, nvsync; type: driver
#12 1280x960 60.00 1280 1376 1488 1800 960 961 964 1000 108000 flags: phsync, pvsync; type: driver
#13 1366x768 59.79 1366 1436 1579 1792 768 771 774 798 85500 flags: phsync, pvsync; type: driver
#14 1366x768 60.00 1366 1380 1436 1500 768 769 772 800 72000 flags: phsync, pvsync; type: driver
#15 1360x768 60.02 1360 1424 1536 1792 768 771 777 795 85500 flags: phsync, pvsync; type: driver
#16 1280x800 59.81 1280 1352 1480 1680 800 803 809 831 83500 flags: nhsync, pvsync; type: driver
#17 1280x800 59.91 1280 1328 1360 1440 800 803 809 823 71000 flags: phsync, nvsync; type: driver
#18 1280x768 59.87 1280 1344 1472 1664 768 771 778 798 79500 flags: nhsync, pvsync; type: driver
#19 1280x768 59.99 1280 1328 1360 1440 768 771 778 790 68250 flags: phsync, nvsync; type: driver
#20 1280x720 60.00 1280 1390 1430 1650 720 725 730 750 74250 flags: phsync, pvsync; type: driver
#21 800x600 60.32 800 840 968 1056 600 601 605 628 40000 flags: phsync, pvsync; type: driver
#22 800x600 56.25 800 824 896 1024 600 601 603 625 36000 flags: phsync, pvsync; type: driver
#23 848x480 60.00 848 864 976 1088 480 486 494 517 33750 flags: phsync, pvsync; type: driver
#24 640x480 59.94 640 656 752 800 480 490 492 525 25175 flags: nhsync, nvsync; type: driver
props:
1 EDID:
flags: immutable blob
blobs:
value:
2 DPMS:
flags: enum
enums: On=0 Standby=1 Suspend=2 Off=3
value: 0
5 link-status:
flags: enum
enums: Good=0 Bad=1
value: 0
6 non-desktop:
flags: immutable range
values: 0 1
value: 0
4 TILE:
flags: immutable blob
blobs:
value:
20 CRTC_ID:
flags: object
value: 37
Run cmd: modetest -M tidss -D 0 -a -s 39@37:1920x1080 -P 31@37:1920x1080 -Ftiles
or kmstest -c hdmi -r 1920x1080
There is no output on HDMI display.
Check the dss register DSS0_VP_SIZE_SCREEN :
root@j7-evm:~# devmem2 0x4aa0050
/dev/mem opened.
Memory mapped at address 0xffff8f240000.
Read at address 0x04AA0050 (0xffff8f240050): 0x0437077F
The resolution changed to 1920x1080, but still no output.
Hdmi montior works well if dss control by r5f.
Any suggestions?
