Hello,
C20 and SX20 are very different, hardware-wise. C20 follows same architecture of the C-Series, i.e. video DSPs and FPGAs controlling video inputs/outputs, whilst the SX20 is based on a single chip design doing video and audio. No FPGA in the picture here. On C-Series we can get more details on video input/output by looking at the FPGA. On SX20 we have some other commands we can use to check the same.
E.g. following command can be used to check the DVI input.
[dderidde-sx20:~] $ v4l2-ctl -d1 --log-status
Status Log:
sx20-v4l2: ================== START STATUS CARD ==================
sx20-v4l2: Version: 0.1.0
sx20-v4l2: dvi-d: cable detect 0
sx20-v4l2: dvi-a: hsync detect 0
adv7604 4-0020: connector type: DVI-D
adv7604 4-0020: EDID enabled
adv7604 4-0020: CEC disabled
adv7604 4-0020: digital cable not detected (+5V power)
adv7604 4-0020: TMDS signal not detected
adv7604 4-0020: prim-mode = 0x5, video std = 0x1e
adv7604 4-0020: CP free run: on
adv7604 4-0020: STDI not locked
adv7604 4-0020: No video detected
adv7604 4-0020: receive DVI-D signal (AVI infoframe not supported)
sx20-v4l2: ================== END STATUS CARD ==================
[dderidde-sx20:~] $
[dderidde-sx20:~] $ v4l2-ctl -d1 --all
Driver Info (not using libv4l2):
Driver name : sx20-v4l2
Card type : Cisco SX20 v4l2
Bus info : netra
Driver version: 0.1.0
Capabilities : 0x00000001
Video Capture
Format Video Capture:
Width/Height : 0/0
Pixel Format : ''
Field : Any
Bytes per Line: 0
Size Image : 0
Colorspace : Unknown (00000000)
Video input : 0 (DVI input (digital): no signal)
DV preset: 18
DV timings:
Width: 0
Height: 0
Frame format: progressive
Polarities: 0
Pixelclock: 0 Hz
Horizontal frontporch: 0
Horizontal sync: 0
Horizontal backporch: 0
Vertical frontporch: 0
Vertical sync: 0
Vertical backporch: 0
[dderidde-sx20:~] $
[dderidde-sx20:~] $ v4l2-ctl -d1 -V -D -I --verbose
VIDIOC_QUERYCAP: ok
Driver Info (not using libv4l2):
Driver name : sx20-v4l2
Card type : Cisco SX20 v4l2
Bus info : netra
Driver version: 0.1.0
Capabilities : 0x00000001
Video Capture
VIDIOC_G_FMT: ok
Format Video Capture:
Width/Height : 0/0
Pixel Format : ''
Field : Any
Bytes per Line: 0
Size Image : 0
Colorspace : Unknown (00000000)
VIDIOC_G_INPUT: ok
Video input : 0 (DVI input (digital): no signal)
[dderidde-sx20:~] $
What do these commands return when you are seeing the DVI issue??
