xref: /linux/drivers/platform/x86/amd/pmf/spc.c (revision 021bc4b9)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * AMD Platform Management Framework Driver - Smart PC Capabilities
4  *
5  * Copyright (c) 2023, Advanced Micro Devices, Inc.
6  * All Rights Reserved.
7  *
8  * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
9  *          Patil Rajesh Reddy <Patil.Reddy@amd.com>
10  */
11 
12 #include <acpi/button.h>
13 #include <linux/amd-pmf-io.h>
14 #include <linux/power_supply.h>
15 #include <linux/units.h>
16 #include "pmf.h"
17 
18 #ifdef CONFIG_AMD_PMF_DEBUG
19 static const char *ta_slider_as_str(unsigned int state)
20 {
21 	switch (state) {
22 	case TA_BEST_PERFORMANCE:
23 		return "PERFORMANCE";
24 	case TA_BETTER_PERFORMANCE:
25 		return "BALANCED";
26 	case TA_BEST_BATTERY:
27 		return "POWER_SAVER";
28 	default:
29 		return "Unknown TA Slider State";
30 	}
31 }
32 
33 void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
34 {
35 	dev_dbg(dev->dev, "==== TA inputs START ====\n");
36 	dev_dbg(dev->dev, "Slider State: %s\n", ta_slider_as_str(in->ev_info.power_slider));
37 	dev_dbg(dev->dev, "Power Source: %s\n", amd_pmf_source_as_str(in->ev_info.power_source));
38 	dev_dbg(dev->dev, "Battery Percentage: %u\n", in->ev_info.bat_percentage);
39 	dev_dbg(dev->dev, "Designed Battery Capacity: %u\n", in->ev_info.bat_design);
40 	dev_dbg(dev->dev, "Fully Charged Capacity: %u\n", in->ev_info.full_charge_capacity);
41 	dev_dbg(dev->dev, "Drain Rate: %d\n", in->ev_info.drain_rate);
42 	dev_dbg(dev->dev, "Socket Power: %u\n", in->ev_info.socket_power);
43 	dev_dbg(dev->dev, "Skin Temperature: %u\n", in->ev_info.skin_temperature);
44 	dev_dbg(dev->dev, "Avg C0 Residency: %u\n", in->ev_info.avg_c0residency);
45 	dev_dbg(dev->dev, "Max C0 Residency: %u\n", in->ev_info.max_c0residency);
46 	dev_dbg(dev->dev, "GFX Busy: %u\n", in->ev_info.gfx_busy);
47 	dev_dbg(dev->dev, "LID State: %s\n", in->ev_info.lid_state ? "close" : "open");
48 	dev_dbg(dev->dev, "User Presence: %s\n", in->ev_info.user_present ? "Present" : "Away");
49 	dev_dbg(dev->dev, "Ambient Light: %d\n", in->ev_info.ambient_light);
50 	dev_dbg(dev->dev, "==== TA inputs END ====\n");
51 }
52 #else
53 void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in) {}
54 #endif
55 
56 static void amd_pmf_get_smu_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
57 {
58 	u16 max, avg = 0;
59 	int i;
60 
61 	memset(dev->buf, 0, sizeof(dev->m_table));
62 	amd_pmf_send_cmd(dev, SET_TRANSFER_TABLE, 0, 7, NULL);
63 	memcpy(&dev->m_table, dev->buf, sizeof(dev->m_table));
64 
65 	in->ev_info.socket_power = dev->m_table.apu_power + dev->m_table.dgpu_power;
66 	in->ev_info.skin_temperature = dev->m_table.skin_temp;
67 
68 	/* Get the avg and max C0 residency of all the cores */
69 	max = dev->m_table.avg_core_c0residency[0];
70 	for (i = 0; i < ARRAY_SIZE(dev->m_table.avg_core_c0residency); i++) {
71 		avg += dev->m_table.avg_core_c0residency[i];
72 		if (dev->m_table.avg_core_c0residency[i] > max)
73 			max = dev->m_table.avg_core_c0residency[i];
74 	}
75 
76 	avg = DIV_ROUND_CLOSEST(avg, ARRAY_SIZE(dev->m_table.avg_core_c0residency));
77 	in->ev_info.avg_c0residency = avg;
78 	in->ev_info.max_c0residency = max;
79 	in->ev_info.gfx_busy = dev->m_table.avg_gfx_activity;
80 }
81 
82 static const char * const pmf_battery_supply_name[] = {
83 	"BATT",
84 	"BAT0",
85 };
86 
87 static int amd_pmf_get_battery_prop(enum power_supply_property prop)
88 {
89 	union power_supply_propval value;
90 	struct power_supply *psy;
91 	int i, ret;
92 
93 	for (i = 0; i < ARRAY_SIZE(pmf_battery_supply_name); i++) {
94 		psy = power_supply_get_by_name(pmf_battery_supply_name[i]);
95 		if (!psy)
96 			continue;
97 
98 		ret = power_supply_get_property(psy, prop, &value);
99 		if (ret) {
100 			power_supply_put(psy);
101 			return ret;
102 		}
103 	}
104 
105 	return value.intval;
106 }
107 
108 static int amd_pmf_get_battery_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
109 {
110 	int val;
111 
112 	val = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_PRESENT);
113 	if (val < 0)
114 		return val;
115 	if (val != 1)
116 		return -ENODEV;
117 
118 	in->ev_info.bat_percentage = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_CAPACITY);
119 	/* all values in mWh metrics */
120 	in->ev_info.bat_design = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN) /
121 		MILLIWATT_PER_WATT;
122 	in->ev_info.full_charge_capacity = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_ENERGY_FULL) /
123 		MILLIWATT_PER_WATT;
124 	in->ev_info.drain_rate = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_POWER_NOW) /
125 		MILLIWATT_PER_WATT;
126 
127 	return 0;
128 }
129 
130 static int amd_pmf_get_slider_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
131 {
132 	int val;
133 
134 	switch (dev->current_profile) {
135 	case PLATFORM_PROFILE_PERFORMANCE:
136 		val = TA_BEST_PERFORMANCE;
137 		break;
138 	case PLATFORM_PROFILE_BALANCED:
139 		val = TA_BETTER_PERFORMANCE;
140 		break;
141 	case PLATFORM_PROFILE_LOW_POWER:
142 		val = TA_BEST_BATTERY;
143 		break;
144 	default:
145 		dev_err(dev->dev, "Unknown Platform Profile.\n");
146 		return -EOPNOTSUPP;
147 	}
148 	in->ev_info.power_slider = val;
149 
150 	return 0;
151 }
152 
153 static int amd_pmf_get_sensor_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
154 {
155 	struct amd_sfh_info sfh_info;
156 	int ret;
157 
158 	/* Get ALS data */
159 	ret = amd_get_sfh_info(&sfh_info, MT_ALS);
160 	if (!ret)
161 		in->ev_info.ambient_light = sfh_info.ambient_light;
162 	else
163 		return ret;
164 
165 	/* get HPD data */
166 	ret = amd_get_sfh_info(&sfh_info, MT_HPD);
167 	if (ret)
168 		return ret;
169 
170 	switch (sfh_info.user_present) {
171 	case SFH_NOT_DETECTED:
172 		in->ev_info.user_present = 0xff; /* assume no sensors connected */
173 		break;
174 	case SFH_USER_PRESENT:
175 		in->ev_info.user_present = 1;
176 		break;
177 	case SFH_USER_AWAY:
178 		in->ev_info.user_present = 0;
179 		break;
180 	}
181 
182 	return 0;
183 }
184 
185 void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
186 {
187 	/* TA side lid open is 1 and close is 0, hence the ! here */
188 	in->ev_info.lid_state = !acpi_lid_open();
189 	in->ev_info.power_source = amd_pmf_get_power_source();
190 	amd_pmf_get_smu_info(dev, in);
191 	amd_pmf_get_battery_info(dev, in);
192 	amd_pmf_get_slider_info(dev, in);
193 	amd_pmf_get_sensor_info(dev, in);
194 }
195