proxy: experiments: Add dp2hdmi.py for manual display config

SMC GPIO support is required for powering the dp2hdmi converter on.
Uses m1n1's C implementation otherwise.

Signed-off-by: Janne Grunau <j@jannau.net>

proxyclient/experiments/dp2hdmi.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: MIT
+
+import sys, pathlib
+sys.path.append(str(pathlib.Path(__file__).resolve().parents[1]))
+
+from m1n1.setup import *
+from m1n1.fw.smc import SMCClient
+
+# init SMC
+smc_addr = u.adt["arm-io/smc"].get_reg(0)[0]
+smc = SMCClient(u, smc_addr, None)
+smc.verbose = 3
+
+smc.start()
+smc.start_ep(0x20)
+
+smcep = smc.epmap[0x20]
+
+# init/start DCP endpoints
+p.display_start_dcp()
+
+# power dp2hdmi converter on
+target_type = u.adt.getprop('target-type')
+if target_type in ["J180d", "J474s", "J475c"]: # mac pro m2 ultra/mini m2 pro/studio m2 max
+    dp2hdmi_node = u.adt["/arm-io/dp2hdmi-gpio0"]
+elif target_type in ["J473"]: # mac mini m2
+    dp2hdmi_node = u.adt["/arm-io/dp2hdmi-gpio"]
+elif target_type in ["J475d"]: # mac studio m2 ultra
+    dp2hdmi_node = u.adt["/arm-io/dp2hdmi-gpio1"]
+
+hdmi_pwr_en_gpio = dp2hdmi_node.getprop('function-hdmi_pwr_en').args[0].to_bytes(4, byteorder='big').decode()
+dp2hdmi_pwr_en_gpio = dp2hdmi_node.getprop('function-dp2hdmi_pwr_en').args[0].to_bytes(4, byteorder='big').decode()
+
+print(f"dp2hdmi_pwr_enable:{dp2hdmi_pwr_en_gpio} hdmi_pwr_enable:{hdmi_pwr_en_gpio}")
+smcep.write32(hdmi_pwr_en_gpio, 0x800001)
+smcep.write32(dp2hdmi_pwr_en_gpio, 0x800001)
+
+smc.stop()
+
+# manual display config
+config = u.malloc(256)
+p.iface.writemem(config, b'1920x1080@60\0')
+p.display_configure(config)