Co-existence of full frame and partial frame idle image updates
Disclosed herein are techniques to coordinate power management between a platform and a panel. Provided are apparatuses, techniques, and circuitry to determine whether to initiate power management features in a panel and send a signal from a platform to the panel including an indication that no frame updates are expected and power management functions can be initiated.
1. A display panel comprising:
a receiver to:
receive, from a transmitter and after a first frame boundary, a first packet comprising a symbol that indicates that a frame update is not expected; and
receive, from the transmitter and after a second frame boundary, a second packet comprising a symbol that indicates that a frame update is not expected, wherein the second frame boundary is the next frame boundary after the first frame boundary; and
a display controller to initiate one or more power management functions based on a value of the symbol in the first packet, wherein to initiate the one or more power management functions comprises to gate a clock signal for one or more components of the display panel.
2. The display panel of claim 1 , wherein the receiver is to receive the first packet and the second packet over a link with the transmitter, wherein, based on the value of the symbol in the first packet, the link with the transmitter is shut down.
3. The display panel of claim 1 , further comprising a timer, wherein the timer is to use a timing of the second packet to synchronize with the transmitter.
4. The display panel of claim 1 , wherein the receiver is to receive the first packet and the second packet in an in-band channel.
5. A system comprising the display panel of claim 1 and the transmitter, the transmitter to:
transmit the first packet to the display panel; and
transmit the second packet to the display panel.
6. The system of claim 5 , wherein the transmitter is to transmit the first packet and the second packet in an in-band channel.
7. The system of claim 5 , wherein the transmitter is to transmit the first packet to the display panel over a link, wherein, after the transmitter transmits the first packet over the link, the link is shut down.
8. The system of claim 5 , wherein the system is a cell phone.
9. An apparatus comprising:
a display engine comprising a transmitter, the transmitter to:
transmit, after a first frame boundary, a first packet to a display panel, wherein the first packet comprises a symbol that indicates that a frame update is not expected; and
transmit, after a second frame boundary, a second packet to the display panel, wherein the second packet comprises a symbol that indicates that a frame update is not expected, wherein the second frame boundary is the next frame boundary after the first frame boundary,
wherein receipt of the first packet is to cause the display panel to initiate one or more power management functions, wherein the display panel is to receive the first packet and the second packet over a link with the transmitter, wherein, based on the value of the symbol in the first packet, the link with the transmitter is shut down.
10. The apparatus of claim 9 , wherein the transmitter is to transmit the first packet and the second packet in an in-band channel.
11. The apparatus of claim 9 , further comprising the display panel, wherein the display panel comprises:
a receiver to receive, from the transmitter, the first packet and the second packet; and
a display controller to initiate one or more power management functions based on a value of the symbol in the first packet.
12. The apparatus of claim 11 , wherein to initiate the one or more power management functions comprises to gate a clock signal for one or more components of the display panel.
13. The apparatus of claim 11 , wherein the display panel further comprising a timer, wherein the timer is to use a timing of the second packet to synchronize with the transmitter.
14. The apparatus of claim 9 , wherein the transmitter is to transmit the first packet to the display panel over a link, wherein, after the transmitter transmits the first packet over the link, the link is shut down.
15. A method comprising:
transmitting, after a first frame boundary, a first packet to a display panel, wherein the first packet comprises a symbol that indicates that a frame update is not expected;
transmitting, after a second frame boundary, a second packet to the display panel, wherein the second packet comprises a symbol that indicates that a frame update is not expected, wherein the second frame boundary is the next frame boundary after the first frame boundary; and
initiating, by the display panel, one or more power management functions based on a value of the symbol in the first packet, wherein initiating the one or more power management functions comprises gating a clock signal for one or more components of the display panel.
16. The method of claim 15 , wherein transmitting the first packet comprises transmitting the first packet over a link, further comprising shutting down the link after transmission of the first packet over the link.
17. The method of claim 15 , wherein transmitting the first packet comprises transmitting the first packet in an in-band channel.
18. The method of claim 15 , further comprising using a timing of the second packet to synchronize a timer of the display panel with a transmitter that transmitted the first packet.