Kapil Porwal 400f1aade8 soc/intel/common: Add support for AP initiated mode entry ... Add support for AP initiated mode entry. The code flow has been optimized as below - Code flow when AP initiated mode entry is disabled: +-------+ | Start | +---+---+ | | +---------+---------+ |wait_for_connection| | Is DP ALT mode | | available? | +---------+---------+ | +--------------->-------+ Yes| No | +---------+---------+ | |Skip enter_dp_mode | | +---------+---------+ | | | | | +-----------+----------+ | |wait_for_dp_mode_entry| | | Is DP flag set? | | +-----------+----------+ | | | +--------------->-------- Yes| No | +-----------+----------+ | | wait_for_hpd | | | Is HPD_LVL flag set? | | +-----------+----------+ | | | +--------------->-------- Yes| No | +-----------+----------+ | | Rest of the code | | +-----------+----------+ | | | +---------------<-------+ | +---+---+ | End | +-------+ Code flow when AP initiated mode entry is enabled: +-------+ | Start | +---+---+ | +------------+-----------+ |Skip wait_for_connection| +------------+-----------+ | +--------+-------+ | enter_dp_mode | | Is USB device? | +--------+-------+ | +--------------->-------+ Yes| No | +---------+---------+ | | enter_dp_mode | | | Send DP mode | | | entry command | | +---------+---------+ | | | +-----------+----------+ | |wait_for_dp_mode_entry| | | Is DP flag set? | | | (If not, loop wait | | | until timed out) | | +-----------+----------+ | | | +--------------->-------- Yes| No | +-----------+----------+ | | wait_for_hpd | | | Is HPD_LVL flag set? | | | (If not, loop wait | | | until timed out) | | +-----------+----------+ | | | +--------------->-------- Yes| No | +-----------+----------+ | | Rest of the code | | +-----------+----------+ | | | +---------------<-------+ | +---+---+ | End | +-------+ BUG=b:247670186 TEST=Verify display over TCSS and its impact on boot time for google/rex Time taken by enter_dp_mode / wait_for_dp+hpd / MultiPhaseSiInit functions with this patch train: 1. When AP Mode entry is enabled - With type-c display on C1 and SuzyQ on C0: 6.9ms / 420ms / 616ms - With USB key on C1 and SuzyQ on C0 : 6.0ms / 505ms / 666ms - Without any device on C1 and SuzyQ on C0 : 3.7ms / 0ms / 178ms 2. When AP Mode entry is disabled - With type-c display on C1 and SuzyQ on C0: 1.7ms / 2.5ms / 213ms - With USB key on C1 and SuzyQ on C0 : 0.9ms / 3.3ms / 177ms - Without any device on C1 and SuzyQ on C0 : 0.8ms / 1.8ms / 165ms Without this patch train, wait_for_hpd would cause a constant delay of WAIT_FOR_HPD_TIMEOUT_MS (i.e. 3 seconds) per type-c port when there is no device connected. Signed-off-by: Kapil Porwal <kapilporwal@google.com> Change-Id: I514ccbdbaf905c49585dc00746d047554d7c7a58 Reviewed-on: https://review.coreboot.org/c/coreboot/+/76366 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com> Reviewed-by: Subrata Banik <subratabanik@google.com>		2023-07-15 12:48:01 +00:00
..
alderlake	soc/intel/adl: Add Raptor Lake-HX definitions	2023-07-14 14:31:24 +00:00
apollolake	soc/intel/apl: Use newer function for resource declarations	2023-07-12 09:15:08 +00:00
baytrail	soc/intel/baytrail: Use newer function for resource declarations	2023-07-13 14:13:26 +00:00
braswell	soc/intel/braswell: Use newer function for resource declarations	2023-07-13 14:14:21 +00:00
broadwell	soc/intel/broadwell: Use newer function for resource declarations	2023-07-12 09:14:16 +00:00
cannonlake	soc/intel/cannonlake: Hook up ucode for CML-S	2023-07-14 18:49:33 +00:00
common	soc/intel/common: Add support for AP initiated mode entry	2023-07-15 12:48:01 +00:00
denverton_ns	acpi/gnvs.c: Drop unused pointer to the cbmem console	2023-07-06 13:54:30 +00:00
elkhartlake	soc/intel: Rename pcr.asl to pch_pcr.asl	2023-07-13 16:37:56 +00:00
jasperlake	soc/intel: Rename pcr.asl to pch_pcr.asl	2023-07-13 16:37:56 +00:00
meteorlake	soc/intel: Rename pcr.asl to pch_pcr.asl	2023-07-13 16:37:56 +00:00
skylake	soc/intel: Rename pcr.asl to pch_pcr.asl	2023-07-13 16:37:56 +00:00
tigerlake	soc/intel: Rename pcr.asl to pch_pcr.asl	2023-07-13 16:37:56 +00:00
xeon_sp	soc/intel: Rename pcr.asl to pch_pcr.asl	2023-07-13 16:37:56 +00:00
Makefile.inc