Difference between revisions of "Jetson TX2/28 Display debug"
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'''For T186(TX2).''' Note that TX2 still uses driver code of T210. <br> | '''For T186(TX2).''' Note that TX2 still uses driver code of T210. <br> | ||
kernel/t18x/drivers/video/tegra/dc <br> | kernel/t18x/drivers/video/tegra/dc <br> | ||
| + | |||
| + | ==Tips== | ||
| + | *Capture edid | ||
| + | sudo cat /sys/kernel/debug/tegradc.X/edid #X=0,1,2. | ||
| + | * Forcing edid | ||
| + | **Method 1 Driver | ||
| + | # Prepare a known 256byte EDID. | ||
| + | # set use_fallback = true; in tegra_edid_get_monspecs() under edid.c. | ||
| + | # fill in the known EDID to default_720p_edid[256]. | ||
| + | |||
| + | |||
==Known issues== | ==Known issues== | ||
Revision as of 23:45, 8 January 2018
Get prepared
This section focuses on debug display driver issue on rel-28.x release.
Drivers of tegra display controller are under kernel source: https://developer.nvidia.com/embedded/downloads
Location:
For T210(TX1)
kernel/display/drivers/video/tegra/dc/
For T186(TX2). Note that TX2 still uses driver code of T210.
kernel/t18x/drivers/video/tegra/dc
Tips
- Capture edid
sudo cat /sys/kernel/debug/tegradc.X/edid #X=0,1,2.
- Forcing edid
- Method 1 Driver
- Prepare a known 256byte EDID.
- set use_fallback = true; in tegra_edid_get_monspecs() under edid.c.
- fill in the known EDID to default_720p_edid[256].
Known issues
- HDMI
- Display is not be able to up. Moreover, system is not able to up.(Fix after rel-28.2)
