How to drive a edp interface LCD
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There are many options for LCD with Cool Pi driving edp interface.
- DP directly drives edp
The two protocols are basically the same. At present, only a few edp interface screens can not be lit normally according to the test results.
DP PIN number Signal edp Signal 16 DP_AUXP eDP_AUXP 18 DP_AUXN eDP_AUXN 3 DP_TX0P eDP_TX0P 5 DP_TX0N eDP_TX0N 9 DP_TX1P eDP_TX1P 11 DP_TX1N eDP_TX1N -
Mipi dsi to edp
Specification LT8911EXB_Datasheet_R1.0.pdf
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HDMI interface direct drive
The RK3588S HDMI interface can be compatible with HDMI or edp functions. By modifying the DTS configuration, the HDMI interface signal can be directly used as an edp signal. The following figure lists the corresponding relationship between HDMI and edp signals.
HDMI PIN number Signal edp Signal 2 HDMI0_SBDP eDP_AUXP 1 HDMI0_SBDN eDP_AUXN 9 HDMI0_TX0P_PORT eDP_TX0P 11 HDMI0_TX0N_PORT eDP_TX0N 6 HDMI0_TX1P_PORT eDP_TX1P 8 HDMI0_TX1N_PORT eDP_TX1N 3 HDMI0_TX2P_PORT eDP_TX2P 5 HDMI0_TX2N_PORT eDP_TX2N 12 HDMI0_TX3P_PORT eDP_TX3P 14 HDMI0_TX3N_PORT eDP_TX3N - DP directly drives edp