Difference between revisions of "MIPI-DSI"
From Rockchip open source Document
| (One intermediate revision by the same user not shown) | |||
| Line 13: | Line 13: | ||
If the MIPI display card has been created, it would create a sysfs debug directory. | If the MIPI display card has been created, it would create a sysfs debug directory. | ||
| − | <pre | + | <pre>$ ls /sys/class/drm/card0-DSI-1</code> |
</pre> | </pre> | ||
| Line 24: | Line 24: | ||
== Check MIPI display card status: status, enabled, modes == | == Check MIPI display card status: status, enabled, modes == | ||
| − | <pre | + | <pre>$ cd /sys/class/drm/card0-DSI-1 |
$ cat status # should printed "connected" or "disconnected" | $ cat status # should printed "connected" or "disconnected" | ||
$ cat enabled # should printed "enabled" or "disabled" | $ cat enabled # should printed "enabled" or "disabled" | ||
| − | $ cat modes # should printed the available mode list, like 1536x2048 | + | $ cat modes # should printed the available mode list, like 1536x2048 |
</pre> | </pre> | ||
| Line 34: | Line 34: | ||
*Check the MIPI panel power supply. | *Check the MIPI panel power supply. | ||
*Check the panel datasheet, ensure you have configured the timing and power sequence rightly. | *Check the panel datasheet, ensure you have configured the timing and power sequence rightly. | ||
| − | *Check the hardware connected status, or test the panel on workable board. | + | *Check the hardware connected status, or test the panel on workable board. |
| − | |||
| − | |||
Latest revision as of 07:37, 11 October 2017
Contents
References
Tips
Whether MIPI display card has been registered successfully
If the MIPI display card has been created, it would create a sysfs debug directory.
$ ls /sys/class/drm/card0-DSI-1</code>
So you just need to check that directory. If that directory is missing in your machine board, please check:
- Whether MIPI have been enabled in DTS files.
- Whether MIPI panel have been registered successfully.
- Whether you have available VOP module for MIPI.
- Check the kernel log for more detail (dmesg | grep mipi)
Check MIPI display card status: status, enabled, modes
$ cd /sys/class/drm/card0-DSI-1 $ cat status # should printed "connected" or "disconnected" $ cat enabled # should printed "enabled" or "disabled" $ cat modes # should printed the available mode list, like 1536x2048
If you still have no picture on MIPI panel, please check bellow information:
- Check the MIPI panel power supply.
- Check the panel datasheet, ensure you have configured the timing and power sequence rightly.
- Check the hardware connected status, or test the panel on workable board.
