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[参考译文] AM6548：tidss 在 Linux 6.12.46 上不起作用

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Other Parts Discussed in Thread: AM6548

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1586587/am6548-tidss-does-not-work-on-linux-6-12-46

器件型号： AM6548

尊敬的 TI 团队：

我们遇到了 tidss 无法在 Linux 6.12.46 上工作的问题。

 

 

  • SoC：  AM6548
  • DP 连接器芯片：Toshiba 3588867XBG
  • Linux 内核： v6.12.46 CIP（从 Git：//git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git 下载）

 

系统启动后、/dev/fb0 和/dev/dri/cardo 存在、但 DP 端口没有输出。

问题：

tidss 是否在内核 6.12 中未完成？ 如果是、是否有修补程序用于修复？

 

  • 0
    TI__Guru**** 2645495 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    您好、
    由于您正在尝试集成自定义网桥、因此我们只能提供有限的帮助。

    请浏览 【常见问题解答】AM62P：显示子系统 (DSS)：基本调试和论坛最佳实践 以及此 E2E 上的常规调试命令输出后。

    在运行 kmstest 时是否在 DPI 线路上看到输出？

  • 0
    TI__Guru**** 2645495 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    是的。  

    以下是调试信息： 

    root@iot2050-debian:~/kmsxx# ls -l /dev/dri/card*
crw-rw---- 1 root video 226, 0 Sep 9 08:39 /dev/dri/card0
root@iot2050-debian:~/kmsxx# modetest -M tidss
opened device `TI Keystone DSS` on driver `tidss` (version 1.0.0 at 0)
Encoders:
id crtc type possible crtcs possible clones
40 39 none 0x00000001 0x00000001

Connectors:
id encoder status name size (mm) modes encoders
41 40 connected DP-1 520x330 12 40
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot
#0 1920x1200 59.95 1920 1968 2000 2080 1200 1203 1209 1235 154000 flags: phsync, nvsync; type: preferred, driver
#1 1920x1080 60.00 1920 2008 2052 2200 1080 1084 1089 1125 148500 flags: nhsync, nvsync; type: driver
#2 1680x1050 59.95 1680 1784 1960 2240 1050 1053 1059 1089 146250 flags: nhsync, pvsync; type: driver
#3 1600x900 60.00 1600 1624 1704 1800 900 901 904 1000 108000 flags: phsync, pvsync; type: driver
#4 1280x1024 60.02 1280 1328 1440 1688 1024 1025 1028 1066 108000 flags: phsync, pvsync; type: driver
#5 1440x900 59.89 1440 1520 1672 1904 900 903 909 934 106500 flags: nhsync, pvsync; type: driver
#6 1280x800 59.81 1280 1352 1480 1680 800 803 809 831 83500 flags: nhsync, pvsync; type: driver
#7 1280x720 60.00 1280 1390 1430 1650 720 725 730 750 74250 flags: phsync, pvsync; type: driver
#8 1024x768 60.00 1024 1048 1184 1344 768 771 777 806 65000 flags: nhsync, nvsync; type: driver
#9 800x600 60.32 800 840 968 1056 600 601 605 628 40000 flags: phsync, pvsync; type: driver
#10 640x480 59.94 640 656 752 800 480 490 492 525 25175 flags: nhsync, nvsync; type: driver
#11 720x400 70.08 720 738 846 900 400 412 414 449 28320 flags: nhsync, pvsync; type: driver
props:
1 EDID:
flags: immutable blob
blobs:

value:
00ffffffffffff00220e8f3600000000
02210104a53421783a5cf5a8554ca424
0c5054a10800b30095008100d1c0a9c0
81c0a9408180283c80a070b023403020
360006442100001a000000fd00323c1e
5011010a202020202020000000fc0048
5020453234692047340a2020000000ff
00434e4b33303230465a500a20200046
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:

CRTCs:
id fb pos size
39 50 (0,0) (1920x1200)
#0 1920x1200 59.95 1920 1968 2000 2080 1200 1203 1209 1235 154000 flags: phsync, nvsync; type: preferred, driver
props:
24 VRR_ENABLED:
flags: range
values: 0 1
value: 0
27 CTM:
flags: blob
blobs:

value:
28 GAMMA_LUT:
flags: blob
blobs:

value:
29 GAMMA_LUT_SIZE:
flags: immutable range
values: 0 4294967295
value: 256

Planes:
id crtc fb CRTC x,y x,y gamma size possible crtcs
32 39 50 0,0 0,0 0 0x00000001
formats: AR12 AB12 RA12 RG16 BG16 AR15 AB15 AR24 AB24 RA24 BA24 RG24 BG24 AR30 AB30 XR12 XB12 RX12 XR15 XB15 XR24 XB24 RX24 BX24 XR30 XB30 YUYV UYVY NV12
props:
8 type:
flags: immutable enum
enums: Overlay=0 Primary=1 Cursor=2
value: 1
30 IN_FORMATS:
flags: immutable blob
blobs:

value:
01000000000000001d00000018000000
01000000900000004152313241423132
52413132524731364247313641523135
41423135415232344142323452413234
42413234524732344247323441523330
41423330585231325842313252583132
58523135584231355852323458423234
52583234425832345852333058423330
59555956555956594e56313200000000
ffffff1f000000000000000000000000
0000000000000000
in_formats blob decoded:
AR12: LINEAR(0x0)
AB12: LINEAR(0x0)
RA12: LINEAR(0x0)
RG16: LINEAR(0x0)
BG16: LINEAR(0x0)
AR15: LINEAR(0x0)
AB15: LINEAR(0x0)
AR24: LINEAR(0x0)
AB24: LINEAR(0x0)
RA24: LINEAR(0x0)
BA24: LINEAR(0x0)
RG24: LINEAR(0x0)
BG24: LINEAR(0x0)
AR30: LINEAR(0x0)
AB30: LINEAR(0x0)
XR12: LINEAR(0x0)
XB12: LINEAR(0x0)
RX12: LINEAR(0x0)
XR15: LINEAR(0x0)
XB15: LINEAR(0x0)
XR24: LINEAR(0x0)
XB24: LINEAR(0x0)
RX24: LINEAR(0x0)
BX24: LINEAR(0x0)
XR30: LINEAR(0x0)
XB30: LINEAR(0x0)
YUYV: LINEAR(0x0)
UYVY: LINEAR(0x0)
NV12: LINEAR(0x0)
34 zpos:
flags: range
values: 0 1
value: 0
35 COLOR_ENCODING:
flags: enum
enums: ITU-R BT.601 YCbCr=0 ITU-R BT.709 YCbCr=1
value: 0
36 COLOR_RANGE:
flags: enum
enums: YCbCr limited range=0 YCbCr full range=1
value: 1
37 alpha:
flags: range
values: 0 65535
value: 65535
38 pixel blend mode:
flags: enum
enums: Pre-multiplied=0 Coverage=1
value: 0
42 0 0 0,0 0,0 0 0x00000001
formats: AR12 AB12 RA12 RG16 BG16 AR15 AB15 AR24 AB24 RA24 BA24 RG24 BG24 AR30 AB30 XR12 XB12 RX12 XR15 XB15 XR24 XB24 RX24 BX24 XR30 XB30 YUYV UYVY NV12
props:
8 type:
flags: immutable enum
enums: Overlay=0 Primary=1 Cursor=2
value: 0
30 IN_FORMATS:
flags: immutable blob
blobs:

value:
01000000000000001d00000018000000
01000000900000004152313241423132
52413132524731364247313641523135
41423135415232344142323452413234
42413234524732344247323441523330
41423330585231325842313252583132
58523135584231355852323458423234
52583234425832345852333058423330
59555956555956594e56313200000000
ffffff1f000000000000000000000000
0000000000000000
in_formats blob decoded:
AR12: LINEAR(0x0)
AB12: LINEAR(0x0)
RA12: LINEAR(0x0)
RG16: LINEAR(0x0)
BG16: LINEAR(0x0)
AR15: LINEAR(0x0)
AB15: LINEAR(0x0)
AR24: LINEAR(0x0)
AB24: LINEAR(0x0)
RA24: LINEAR(0x0)
BA24: LINEAR(0x0)
RG24: LINEAR(0x0)
BG24: LINEAR(0x0)
AR30: LINEAR(0x0)
AB30: LINEAR(0x0)
XR12: LINEAR(0x0)
XB12: LINEAR(0x0)
RX12: LINEAR(0x0)
XR15: LINEAR(0x0)
XB15: LINEAR(0x0)
XR24: LINEAR(0x0)
XB24: LINEAR(0x0)
RX24: LINEAR(0x0)
BX24: LINEAR(0x0)
XR30: LINEAR(0x0)
XB30: LINEAR(0x0)
YUYV: LINEAR(0x0)
UYVY: LINEAR(0x0)
NV12: LINEAR(0x0)
44 zpos:
flags: range
values: 0 1
value: 1
45 COLOR_ENCODING:
flags: enum
enums: ITU-R BT.601 YCbCr=0 ITU-R BT.709 YCbCr=1
value: 0
46 COLOR_RANGE:
flags: enum
enums: YCbCr limited range=0 YCbCr full range=1
value: 1
47 alpha:
flags: range
values: 0 65535
value: 65535
48 pixel blend mode:
flags: enum
enums: Pre-multiplied=0 Coverage=1
value: 0

Frame buffers:
id size pitch

root@iot2050-debian:~/kmsxx# kmsprint --device=/dev/dri/card0
Connector 0 (41) DP-1 (connected)
Encoder 0 (40) NONE
Crtc 0 (39) 1920x1200@59.95 154.000 1920/48/32/80/+ 1200/3/6/26/- 60 (59.95) P|D
Plane 0 (32) fb-id: 50 (crtcs: 0) 0,0 1920x1200 -> 0,0 1920x1200 (AR12 AB12 RA12 RG16 BG16 AR15 AB15 AR24 AB24 RA24 BA24 RG24 BG24 AR30 AB30 XR12 XB12 RX12 XR15 XB15 XR24 XB24 RX24 BX24 XR30 XB30 YUYV UYVY NV12)
FB 50 1920x1200 XR24
root@iot2050-debian:~/kmsxx# kmstest --device=/dev/dri/card0
Connector 0/@41: DP-1
Crtc 0/@39: 1920x1200@59.95 154.000 1920/48/32/80/+ 1200/3/6/26/- 60 (59.95) P|D
Plane 0/@32: 0,0-1920x1200
Fb 52 1920x1200-XR24
press enter to exit

root@iot2050-debian:~/kmsxx# dmesg | grep -i dss
[ 0.093713] /bus@100000/i2c@2030000/edp-bridge@f: Fixed dependency cycle(s) with /bus@100000/dss@4a00000
[ 0.093977] /bus@100000/dss@4a00000: Fixed dependency cycle(s) with /bus@100000/i2c@2030000/edp-bridge@f
[ 0.101120] /bus@100000/i2c@2030000/edp-bridge@f: Fixed dependency cycle(s) with /bus@100000/dss@4a00000
[ 0.108335] /bus@100000/i2c@2030000/edp-bridge@f: Fixed dependency cycle(s) with /bus@100000/dss@4a00000
[ 0.108442] /bus@100000/dss@4a00000: Fixed dependency cycle(s) with /bus@100000/i2c@2030000/edp-bridge@f
[ 0.548954] /bus@100000/dss@4a00000: Fixed dependency cycle(s) with /bus@100000/i2c@2030000/edp-bridge@f
[ 0.549112] /bus@100000/i2c@2030000/edp-bridge@f: Fixed dependency cycle(s) with /bus@100000/dss@4a00000
[ 4.681946] [drm] Initialized tidss 1.0.0 for 4a00000.dss on minor 0
[ 6.232732] tidss 4a00000.dss: [drm] fb0: tidssdrmfb frame buffer device

  • 0
    TI__Guru**** 2645495 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    请同时分享 kmstest 结果。

  • 0
    TI__Guru**** 2645495 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    这是 kmstest 结果；

    kmstest --device=/dev/dri/card0
    连接器 0/@41：DP-1
    CRTC 0/@39：1920x1200@59.95 154.000 1920/48/32/80/+ 1200/3/6/26/- 60 (59.95) P|D
    平面 0/@32：0、0-1920x1200
    FB 52 1920x1200-XR24

  • 0
    TI__Guru**** 2645495 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    您的配置似乎可以正常工作、您能否探测电路板上的 DPI 引脚并 检查是否看到信号？

  • 0
    TI__Guru**** 2645495 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    tidss 上有一个问题、有一个修复补丁： lore.kernel.org/.../