...

Codeblock

language	text
title	modetest
collapse	true

# modetest
trying to open device 'i915'...failed
trying to open device 'amdgpu'...failed
trying to open device 'radeon'...failed
trying to open device 'nouveau'...failed
trying to open device 'vmwgfx'...failed
trying to open device 'omapdrm'...failed
trying to open device 'exynos'...failed
trying to open device 'tilcdc'...failed
trying to open device 'msm'...failed
trying to open device 'sti'...failed
trying to open device 'tegra'...failed
trying to open device 'imx-drm'...failed
trying to open device 'rockchip'...failed
trying to open device 'atmel-hlcdc'...failed
trying to open device 'fsl-dcu-drm'...failed
trying to open device 'vc4'...failed
trying to open device 'virtio_gpu'...failed
trying to open device 'mediatek'...failed
trying to open device 'meson'...failed
trying to open device 'pl111'...failed
trying to open device 'stm'...done
Encoders:
id      crtc    type    possible crtcs  possible clones
3128      0       DPI     0x00000001      0x000000010x00000000
3330      3733      DSI     0x00000001      0x000000020x00000000

So the display controller has two encoders:

...

Codeblock

language	text
title	modtest
collapse	true

Connectors:
id      encoder status          name            size (mm)       modes   encoders
3229      0       disconnectedconnected       HDMI-A-1        0x0520x320         5    0       3128
  propsmodes:
        1index EDID:
name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
  #0 1280x720 60.00 1280 flags:1390 immutable1430 blob
1650 720 725 730 750 74250 flags: phsync, pvsync; type: driver
  #1 1280x720 60.00 1280 blobs:

1390 1430 1650 720 725 730 750 74250 flags: phsync, pvsync; type: driver
  #2 800x600 75.00 800 816 896 1056 600 601 604 625 49500 flags: phsync, pvsync; type: driver
  #3 720x480 59.94 720 736 798 858 480 489 495 525 27000 flags: nhsync, nvsync; type: driver
  #4 720x480 59.94 720 736 798 858 480 489 495 525 27000 flags: nhsync, nvsync; type: driver
  props:
        1 EDID:
                flags: immutable blob
                blobs:

                value:
                        00ffffffffffff0009d10a7845540000
                        1d120103803420782ec5c4a3574a9c23
                        124f52a56b807100810095008180b300
                        a940d1000101283c80a070b023403020
                        360007442100001a000000ff00463738
                        30303937345a4c300a20000000fd0032
                        551f5e11000a202020202020000000fc
                        0042656e51204732343030570a2001e6
                        02031af14604900301850766030c0010
                        00008301000023090707011d007251d0
                        1e206e285500c48e2100001f011d8018
                        711c1620582c2500c48e2100009e8c0a
                        d08a20e02d10103e9600c48e21000019
                        023a801871382d40582c4500c48e2100
                        0006d60980a020e02d1008602200128e
                        2108081800000000000000000000002c
        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
        19 CRTC_ID:
                flags: object
                value: 0
31      30      connected       DSI-1           52x86           1       30
  modes:
        index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
  #0 480x800 50.00 480 578 610 708 800 815 825 839 29700 flags: ; 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
        5 link-status:
                flags: enum
                enums: Good=0 Bad=1
                value: 0
        6 non-desktop:
                flags: immutable range
                values: 0 1
                value: 0
        19 CRTC_ID:
                flags: object
                value: 33

CRTCs:
id      fb      pos     size
33      41      (0,0)   (480x800)
  #0 480x800 50.00 480 578 610 708 800 815 825 839 29700 flags: ; type: preferred, driver
   valueprops:
        220 DPMSACTIVE:
                flags: enumrange
                enumsvalues: On=0 Standby=1 Suspend=2 Off=3
                value: 01
        5 link-status21 MODE_ID:
                flags: enumblob
                enums: Good=0 Bad=1blobs:

                value: 0
        6 non-desktop:
                flags: immutable range
                values: 0 1
  04740000e00142026202c40200002003
              value: 0
        4 TILE:2f033903470300003200000000000000
                flags: immutable blob
      48000000343830783830300000000000
          blobs:

                value:00000000000000000000000000000000
34      33      connected       DSI-1     00000000
      52x86  18 OUT_FENCE_PTR:
        1       33
 flags: modes:range
        index name refresh (Hz) hdisp hss hse htot vdisp vssvalues: vse0 vtot18446744073709551615
  #0 480x800 50.00 480 578 610 708 800 815 825 839 29700 flags: ; type: preferred, driver
  propsvalue: 0
        125 EDIDGAMMA_LUT:
                flags: immutable blob
                blobs:

                value:
        2 DPMS26 GAMMA_LUT_SIZE:
                flags: immutable enumrange
                enumsvalues: On=0 Standby=1 Suspend=2 Off=3
 4294967295
                value: 256

Planes:
id      crtc    fb      CRTC x,y        x,y   value: 0
 gamma size      5 link-status:
possible crtcs
32      33      41    flags: enum
 0,0             0,0  enums: Good=0 Bad=1
  0              value: 00x00000001
  formats: AR24 XR24 RG24 RG16 AR15 6 non-desktop:
  XR15 AR12 XR12 C8  
  props:
        7  flags: immutable rangetype:
                valuesflags: 0immutable 1enum
                valueenums: Overlay=0 Primary=1 Cursor=2
         4 TILE:
      value: 1
        16 flags: immutable blobFB_ID:
                blobsflags: object

                value:

CRTCs:
id 41
      fb  17 IN_FENCE_FD:
   pos     size
37      40  flags:    (0,0)   (480x800)signed range
  #0 480x800 50.00 480 578 610 708 800 815 825 839 29700 flags: ; typevalues: preferred,-1 driver2147483647
  props:
        24 VRR_ENABLED:
      value: -1
        19 flagsCRTC_ID: range
                valuesflags: 0 1object
                value: 033
        2812 GAMMACRTC_LUTX:
                flags: signed blobrange
                blobsvalues: -2147483648 2147483647

                value: 0
        2913 GAMMACRTC_LUT_SIZEY:
                flags: immutablesigned range
                values: 0-2147483648 42949672952147483647
                value: 256

Planes:
id0
        14 CRTC_W:
                crtcflags: range
   fb      CRTC x,y      values: 0 x,y2147483647
     gamma size      possible crtcs
35   value: 480
  37      4015 CRTC_H:
     0,0           flags: range
 0,0     0          values: 0 2147483647
   0x00000001
  formats: AR24 XR24 RG24 RG16 AR15 XR15 AR12 XR12 C8
  propsvalue: 800
        8 typeSRC_X:
                flags: immutable enumrange
                enumsvalues: Overlay=0 Primary=1 Cursor=24294967295
                value: 10
        309 INSRC_FORMATSY:
                flags: immutable blobrange
                blobsvalues: 0 4294967295

                value: 0
        10 SRC_W:
               01000000000000000900000018000000 flags: range
                values: 0 4294967295
      01000000400000004152323458523234
          value: 31457280
        11 SRC_H:
    52473234524731364152313558523135
            flags: range
           41523132585231324338202000000000
     values: 0 4294967295
                value: ff01000000000000000000000000000052428800
34      0       0       0,0         0000000000000000
    0,0     0       in_formats blob decoded:
      0x00000001
  formats: AR24 RG24 RG16 AR15 AR12 C8  
  props:
       AR24:  LINEAR(0x0)7 type:
                flags: immutable enum
       XR24:  LINEAR(0x0)
       enums: Overlay=0 Primary=1 Cursor=2
                RG24value:  LINEAR(0x0)0
        16 FB_ID:
                RG16flags:  LINEAR(0x0)object
                value: 0
        AR15:  LINEAR(0x0)17 IN_FENCE_FD:
                flags: signed range
       XR15:  LINEAR(0x0)
       values: -1 2147483647
                AR12value:  LINEAR(0x0)-1
        19 CRTC_ID:
                XR12flags:  LINEAR(0x0)object
                         C8:  LINEAR(0x0)
38value: 0
      0  12 CRTC_X:
    0       0,0     flags: signed  range
     0,0     0      values: -2147483648  2147483647
      0x00000001
  formats: AR24 RG24 RG16 AR15 AR12 C8
  propsvalue: 0
        813 typeCRTC_Y:
                flags: immutablesigned enumrange
                enumsvalues: Overlay=0 Primary=1 Cursor=2-2147483648 2147483647
                value: 0
        3014 INCRTC_FORMATSW:
                flags: immutable blobrange
                blobs:
values: 0 2147483647
                value: 0
        15 CRTC_H:
                flags: 01000000000000000600000018000000
range
                values: 0 2147483647
             01000000300000004152323452473234
   value: 0
        8 SRC_X:
           52473136415231354152313243382020
     flags: range
                values: 0 3f0000000000000000000000000000004294967295
                value: 0
       0000000000000000
 9 SRC_Y:
              in_formats blob decodedflags: range
                values: 0 4294967295
       AR24:  LINEAR(0x0)
       value: 0
        10 SRC_W:
        RG24:  LINEAR(0x0)
      flags: range
                  RG16values: 0 LINEAR(0x0)4294967295
                value: 0
        AR15:  LINEAR(0x0)11 SRC_H:
                flags: range
        AR12:  LINEAR(0x0)
      values: 0 4294967295
                 C8value:  LINEAR(0x0)0

Frame buffers:
id      size    pitch

We have a HDMI connector, which can be used with the encoder of id 31, that is the DPI encoder. Indeed, the RGB parallel interface of the STM32 processor is fed on the board into an HDMI transceiver, that goes out with HDMI signals on connector CN9. So from the point of view of the SoC, it is a parallel RGB interface, but thanks to the HDMI transceiver on the Discovery board, it is in fact usable as an HDMI connector.

The second connector is the DSI connector, which can be used with encoder of id 3330, i.e the DSI encoder, which makes sense.

So let’s ask modetest to display its test picture on the DSI connector, which has id 34 30 for DSI panel resolution is 480×800, so we’ll use the following command:

# modetest -s 3431:480x800

And voilà:

Now if we plug an HDMI screen to the HDMI connector, the modetest output about connector 32 29 changes as the connector is no longer disconnected:

...

Codeblock

language	text
title	modtest HDMI
collapse	true

Connectors:
id      encoder status          name            size (mm)       modes   encoders
3229      0       connected       HDMI-A-1        520x320         35       3128
  modes:
        index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot
  #0) hdisp hss hse htot vdisp vss vse vtot)
  #0 1280x720 60.00 1280 1390 1430 1650 720 725 730 750 74250 flags: phsync, pvsync; type: driver
  #1 1280x720 60.00 1280 1390 1430 1650 720 725 730 750 74250 flags: phsync, pvsync; type: driver
  #1#2 800x600 75.00 800 816 896 1056 600 601 604 625 49500 flags: phsync, pvsync; type: driver
  #3 720x480 59.94 720 736  #2798 858 480 489 495 525 27000 flags: nhsync, nvsync; type: driver
  #4 720x480 59.94 720 736 798 858 480 489 495 525 27000 flags: nhsync, nvsync; type: driver
  props:
        1 EDID:
                flags: immutable blob
                blobs:

                value:
                        00ffffffffffff0009d10a7845540000
                        1d120103803420782ec5c4a3574a9c23
                        124f52a56b807100810095008180b300
                        a940d1000101283c80a070b023403020
                        360007442100001a000000ff00463738
                        30303937345a4c300a20000000fd0032
                        551f5e11000a202020202020000000fc
                        0042656e51204732343030570a2001e6
                        02031af14604900301850766030c0010
                        00008301000023090707011d007251d0
                        1e206e285500c48e2100001f011d8018
                        711c1620582c2500c48e2100009e8c0a
                        d08a20e02d10103e9600c48e21000019
                        023a801871382d40582c4500c48e2100
                        0006d60980a020e02d1008602200128e
                        2108081800000000000000000000002c
        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
        419 TILECRTC_ID:
                flags: immutable blobobject
                blobs:

value: 0

So we can ask modetest to display a 1280×720 picture on the HDMI screen:

# modetest -s 3229:1280x720

Enabling Qt5 support in Buildroot

...

Seitenhierarchie

Versionen im Vergleich

Alte Version 7

Neue Version 8

Schlüssel

Enabling Qt5 support in Buildroot

Seitenhierarchie

Seitenhistorie

Versionen im Vergleich

Alte Version 7

Neue Version 8

Schlüssel

Enabling Qt5 support in Buildroot