Template:Glsdk psdk200 DSS

Running DSS application

DSS applications are omapdrm based. These will demonstrate the clone mode, extended mode, overlay window, z-order and alpha blending features. To demonstrate clone and extended mode, HDMI display must be connected to board. Application requires the supported mode information of connected displays and plane ids. One can get these information by running the modetest application in the filesystem.

  target #  modetest

Running drmclone application

This displays same test pattern on both LCD and HDMI (clone). Overlay window also displayed on LCD. To test clone mode, execute the following command:

  target #  drmclone -l <lcd_w>x<lcd_h> -p <plane_w>x<plane_h>:<x>+<y> -h <hdmi_w>x<hdmi_h>

e.g.: target # drmclone -l 1280x800 -p 320x240:0+0 -h 640x480

We can change position of overlay window by changing x+y values. eg. 240+120 will show @ center

Running drmextended application

This displays different test pattern on LCD and HDMI. Overlay window also displayed on LCD. To test extended mode, execute the following command:

  target # drmextended -l <lcd_w>x<lcd_h> -p <plane_w>x<plane_h>:<x>+<y> -h <hdmi_w>x<hdmi_h>

e.g.: target # drmextended -l 1280x800 -p 320x240:0+0 -h 640x480

Running drmzalpha application

Z-order:

It determines, which overlay window appears on top of the other.

Range: 0 to 3

lowest value for bottom

highest value for top

Alpha Blend:

It determines transparency level of image as a result of both global alpha & pre multiplied alpha value.

Global alpha range: 0 to 255

0 - fully transparent

127 - semi transparent

255 - fully opaque

Pre multipled alpha value: 0 or 1

0 - source is not premultiply with alpha

1 - source is premultiply with alpha

To test drmzalpha, execute the following command:

  target # drmzalpha -s <crtc_w>x<crtc_h> -w <plane1_id>:<z_val>:<glo_alpha>:<pre_mul_alpha> -w <plane2_id>:<z_val>:<glo_alpha>:<pre_mul_alpha>

e.g.: target # drmzalpha -s 1280x800 -w 19:1:255:1 -w 20:2:255:1

Testing with FPDLink Display setup

H/W setup

• DRA7xx EVM + 12V supply for the EVM.
• FPDLink Cable between DRA7xx and De-serilzer board (DS90UB928Q).
• 5V power supply for De-serializer board.
• LCD Adapter board (DS90UH928Q) that sits on De-serializer board.
• LCD Adapter cable which is between LCD panel and the Adapter board.
• 12V power supply for LCD Adapter board.
• The actual LCD panel (LG101(10.1in) or AUO (7.1 in))
• Please refer the picture which shows the overall setup attached here

Kernel Configuration

    -> Device Drivers
      -> Graphics support
        -> OMAP2+ Display Subsystem support (OMAP2_DSS [=y])
          -> OMAP2/3 Display Device Drivers
            <*> LG101 LCD Panel
    -> Device Drivers
      -> Graphics support
        -> OMAP2+ Display Subsystem support (OMAP2_DSS [=y])
          -> OMAP2/3 Display Device Drivers
            <*> SERLINK
    -> Device Drivers
      -> Graphics support
        -> OMAP2+ Display Subsystem support (OMAP2_DSS [=y])
          -> OMAP2/3 Display Device Drivers
            <*> DSERLINK

Testing

On power-cycle, the EVM should boot and show the Tux Logo.
Given below is a snippet from the modetest - it should show the FPDLink Display connected via the following path. The connector-id, crtc-id or plane-ids may change based on the release or kernel version.

Encoders:
id      crtc    type    possible crtcs  possible clones
3       10      TMDS    0x00000003      0x00000000
11      14      TMDS    0x00000002      0x00000000 ---------------------------> FPDLink

Connectors:
id      encoder status          type    size (mm)       modes   encoders
4       3       connected       unknown 0x0             1       3
  modes:
        name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
  800x480 60 800 841 890 931 480 493 497 526 flags: nhsync, nvsync; type: preferred, driver
  props:
        1 EDID:
                flags: immutable blob
                blobs:

                value:  2 DPMS:
                flags: enum
                enums: On=0 Standby=1 Suspend=2 Off=3
                value: 0
12      11      connected       unknown 0x0             1       11 -----------> FPDLink
  modes:
        name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
  1280x800 57 1280 1312 1360 1440 800 804 807 814 flags: nhsync, nvsync; type: preferred, driver
  props:
        1 EDID:
                flags: immutable blob
                blobs:

                value:  2 DPMS:
                flags: enum
                enums: On=0 Standby=1 Suspend=2 Off=3
                value: 0