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Beginner

SX20 DVI input problem

I know SX20 is not designed to be integrated, but all been working great with C20's.

I was able to extend camera via HDMI to CAT6 extender, mic's and speakears are fine.

My problem is with the presentation source.

I have two presentation sources in the room: workstation (for people without laptops) and laptop hookup.

The workstation presentation works fine, laptop hookup looks like it has a broken cable (image is dark and has horizontal lines).

The funny thing  - if I swap SX to C20 - all works fine.

I would blame it to local problem, but I already have 2 rooms like that.

Tried 3 different SX's.

It looks like there is some kind of compatablilty issue between SX and Extron boxes I use to connect laptop to the codec.

My question is: what's different between DVI input on SX and C20?

I see that there is some autodetect feature in SX20 - disabled it without results.

Any ideas appreciated.

Thank you.

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5 REPLIES 5
Highlighted
Cisco Employee

SX20 DVI input problem

Hello

Can you provide bit more information please:

- Version of software for SX and C20

- Model of Extron

- What is exactly your setup? How you connect Extron box/laptop and what type of the cables do you use?

Did you check supported resolutions:

http://www.cisco.com/en/US/prod/collateral/ps7060/ps11304/ps11333/data_sheet_c78-628621_ps11424_Products_Data_Sheet.html

Regarding autodetect please hard code your input and try again.

Thanks

Rafal

Highlighted
Cisco Employee

SX20 DVI input problem

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??

Highlighted
Beginner

SX20 DVI input problem

Hi all,

Thank you for getting back.

Setup description:

Laptop -- VGA--(Extron TP T 15HD A, twisted pair transmitter) -- CAT6 -- (TP R 15HD A, twisted pair reciever) -- VGA -- (Extron RGB-DVI 300 RGB to DVI scaller) --DVI-- (Extron SW2 DVI Plus, controlled DVI switch) -- DVI -- SX20.

Some additional info:

As a workaround, I was able to improve the image by adjusting H.Shift (horisontal image position) on TP T 15HD or on RGB-DVI 300. For some reason, when I move image to the right it becomes brighter and the lines are gone.

Log output below

Workstation (working fine):

[VA-CORP-SOUTHWING-101:~] $ v4l2-ctl -d1 --log-status

Status Log:

   sx20-v4l2: ==================  START STATUS CARD      ==================
   sx20-v4l2: Version: 0.1.0
   sx20-v4l2: dvi-d: cable detect 1
   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 detected (+5V power)
   adv7604 4-0020: TMDS signal detected and locked
   adv7604 4-0020: prim-mode = 0x5, video std = 0x1e
   adv7604 4-0020: CP free run: off
   adv7604 4-0020: STDI locked: lcf (frame height - 1) = 1124, bl = 3384, lcvs (vsync) = 6, fcl = 1864, progressive, -hsync, -vsync
   adv7604 4-0020: Format (CEA):  1920x1080p59 (2200x1125)
   adv7604 4-0020: receive DVI-D signal (AVI infoframe not supported)
   sx20-v4l2: ==================   END STATUS CARD   ==================
[VA-CORP-SOUTHWING-101:~] $ 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): ok)
DV preset: 18
DV timings:
        Width: 1920
        Height: 1080
        Frame format: progressive
        Polarities: 3
        Pixelclock: 148250000 Hz
        Horizontal frontporch: 88
        Horizontal sync: 44
        Horizontal backporch: 148
        Vertical frontporch: 4
        Vertical sync: 6
        Vertical backporch: 35

Laptop:

[VA-CORP-SOUTHWING-101:~] $ v4l2-ctl -d1 --log-status

Status Log:

   sx20-v4l2: ==================  START STATUS CARD      ==================
   sx20-v4l2: Version: 0.1.0
   sx20-v4l2: dvi-d: cable detect 1
   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 detected (+5V power)
   adv7604 4-0020: TMDS signal detected and locked
   adv7604 4-0020: prim-mode = 0x5, video std = 0x1e
   adv7604 4-0020: CP free run: off
   adv7604 4-0020: STDI locked: lcf (frame height - 1) = 805, bl = 4726, lcvs (vsync) = 6, fcl = 1863, progressive, +hsync, +vsync
   adv7604 4-0020: Format:  1024x768p60 (1344x806)
   adv7604 4-0020: AVI infoframe version 2 (13 byte)
   adv7604 4-0020:      6f 00 00 00 00 00 00 00 00 00 00 00 00 00
   adv7604 4-0020:      RGB Default
   sx20-v4l2: ==================   END STATUS CARD   ==================
[VA-CORP-SOUTHWING-101:~] $ 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): ok)
DV preset: 18
DV timings:
        Width: 1024
        Height: 768
        Frame format: progressive
        Polarities: 0
        Pixelclock: 65000000 Hz
        Horizontal frontporch: 24
        Horizontal sync: 136
        Horizontal backporch: 160
        Vertical frontporch: 3
        Vertical sync: 6
        Vertical backporch: 29

Highlighted
Cisco Employee

SX20 DVI input problem

Hello,

thanks for the output of those commands.

I sent these to our escalation team in Oslo to get their feedback and Johan Randby came back with the comment below.

There has been an issue with lack of support for some resolutions on  SX20 (only DMT and CEA formats). You can read more about in these bugs:

CSCty19431 Implement support for CVT and GTF formats in ADV7604

CSCtz77758 1680x1050 VGA input detected as 1400x1050

Recommendation at this point seems to be to change your laptop resolution.

Highlighted
Beginner

SX20 DVI input problem

It is not that easy  - I'm limited to output resolution from twisted pair extender.

Hopefully it can be resolved - SX can be a nice alternative for C40.

Thank you for looking into it.

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