Entry | |
---|---|
R0 | 0: Unblank display |
1: Blank display | |
R1 | DPMS state when blanking display: |
0 = Gate pixel clock | |
1 = Gate pixel and HSync clocks | |
2 = Gate pixel and VSync clocks | |
3 = Gate all clocks | |
R4 | Bits 0-23: 4 (reason code) |
Bits 24-31: Driver number |
Exit | |
---|---|
R4 | 0 |
- | All other registers preserved |
The kernel issues this call in order to instruct the display driver to enable or disable the display, putting the display into the indicated DPMS state if possible. The appropriate driver should respond by performing the requested action and setting R4 to 0 to claim the call.