mainboard/clevo/mtl-h/variants/dgpu/ramstage.c: dGPU only global reset

Signed-off-by: Filip Lewiński <filip.lewinski@3mdeb.com>

Author: filipleple

src/ec/system76/ec/system76_ec.c

@@ -115,7 +115,7 @@ uint8_t system76_read_option(uint8_t option, uint8_t *value)
 	*value = system76_ec_read(REG_DATA);
 
 	return (system76_ec_read(REG_RESULT));
-	
+
 }
 
 uint8_t system76_ec_read_version(uint8_t *data)

src/mainboard/clevo/mtl-h/variants/dgpu/ramstage.c

@@ -30,10 +30,10 @@ void variant_devtree_update(void)
 
 static void set_dgpu_only(void)
 {
-	uint8_t option_state = 99;
-	system76_read_option(OPT_GPU_MUX_CTRL, &option_state);
-	printk(BIOS_ERR, "MUX_CTRL_BIOS state in coreboot: %d", option_state);
-	
+	uint8_t initial_option_state = 99;
+	system76_read_option(OPT_GPU_MUX_CTRL, &initial_option_state);
+	printk(BIOS_ERR, "MUX_CTRL_BIOS state in coreboot: %d", initial_option_state);
+
 	/*
 	 * If the MUX_CTRL_BIOS option needs to be changed to match the settings, we need a
 	 * global reset
@@ -48,12 +48,21 @@ static void set_dgpu_only(void)
 	};
 
 	if (dasharo_dgpu_state() == DGPU_ONLY) {
-		printk(BIOS_ERR, "dgpu_state = dgpu_only, index = %d, value = %d; calling global reset \n", cmd.index, cmd.value);
 		system76_ec_smfi_cmd(CMD_OPTION_SET, sizeof(cmd) / sizeof(uint8_t), (uint8_t *)&cmd);
-		// do_global_reset();
+		if (initial_option_state == 0) {
+			printk(BIOS_ERR, "dgpu_state = dgpu_only, index = %d, value = %d; calling global reset \n", cmd.index, initial_option_state);
+			do_global_reset();
+		}
+	} else {
+		cmd.value = 0;
+		system76_ec_smfi_cmd(CMD_OPTION_SET, sizeof(cmd) / sizeof(uint8_t), (uint8_t *)&cmd);
+		if (initial_option_state == 1) {
+			printk(BIOS_ERR, "dgpu_state = dgpu_only, index = %d, value = %d; calling global reset \n", cmd.index, initial_option_state);
+			do_global_reset();
+		}
 	}
 
-	printk(BIOS_ERR, "dgpu_state = %d, index = %d, value = %d; global reset not called \n", dasharo_dgpu_state(), cmd.index, cmd.value);
+	printk(BIOS_ERR, "dgpu_state = %d, index = %d, value = %d; global reset not called \n", dasharo_dgpu_state(), cmd.index, initial_option_state);
 }
 
 void variant_final(void)