[TRACKING] Framework AMD Ryzen 7040 Series lid wakeup behavior feedback

Kieran_Levin · November 3, 2023, 4:20am

One theory I have is that this code in the EC may be causing an additional interrupt to the host on wake:

FrameworkComputer/EmbeddedController/blob/lotus-zephyr/zephyr/program/lotus/azalea/src/power_sequence.c#L313


      
          
          
/*
           * Issue : 866a60d67
           * for this issue, if into S3 and resume back by keyboard, system would not wake
           * because scan code was send before espi_rst, at the moment system would not
           * take any scan code, co-work with BIOS when Keyboard event send,
           * do this workaround to send a scan code again
           */
          static void key_stuck_wa(void);
          DECLARE_DEFERRED(key_stuck_wa);
          static void key_stuck_wa(void)
          {
          	int wa_bit = *host_get_memmap(EC_CUSTOMIZED_MEMMAP_DISPLAY_ON);
          
          
	if (wa_bit) {
          		*host_get_memmap(EC_CUSTOMIZED_MEMMAP_DISPLAY_ON) = 0;
          		hook_call_deferred(&key_stuck_wa_data, -1);
          		simulate_keyboard(SCANCODE_UNASSIGNED, 1);
          		simulate_keyboard(SCANCODE_UNASSIGNED, 0);
          	} else
          		hook_call_deferred(&key_stuck_wa_data, 10 * MSEC);

When we go from S0i3 to S0ix, the EC will send some dummy key presses to the host so the keyboard will keep working. This may cause the host to wake up to screen on, and stay there.

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[TRACKING] Framework AMD Ryzen 7040 Series lid wakeup behavior feedback

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