Difference between revisions of "MIPI-DSI"
From Rockchip open source Document
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| − | = | + | = References = |
| − | -- | + | [https://github.com/rockchip-linux/kernel/tree/release-4.4/drivers/gpu/drm/rockchip source code] |
| − | + | [https://github.com/rockchip-linux/kernel/blob/release-4.4/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt device-tree document] | |
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| − | = | + | = Tips = |
| − | + | == Whether MIPI display card has been registered successfully == | |
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> | ||
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*Check the kernel log for more detail (dmesg | grep mipi) | *Check the kernel log for more detail (dmesg | grep mipi) | ||
| − | + | == 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> | ||
| − | + | == If you still have no picture on MIPI panel, please check bellow information: == | |
*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. |
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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.
