1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <types.h>
4 #include <option.h>
5 #include <device/device.h>
6
7 #include <southbridge/intel/common/gpio.h>
8 #include <ec/lenovo/pmh7/pmh7.h>
9 #include <console/console.h>
10
11 #include "hybrid_graphics.h"
12 #include "chip.h"
13
14 /*
15 * Returns the hybrid graphics presence and user's card preferences.
16 */
early_hybrid_graphics(bool * enable_igd,bool * enable_peg)17 void early_hybrid_graphics(bool *enable_igd, bool *enable_peg)
18 {
19 const struct drivers_lenovo_hybrid_graphics_config *config;
20 const struct device *dev;
21 enum hybrid_graphics_req mode;
22
23 /* TODO: Use generic device instead of dummy PNP device */
24 dev = dev_find_slot_pnp(HYBRID_GRAPHICS_PORT, HYBRID_GRAPHICS_DEVICE);
25
26 if (!dev || !dev->chip_info) {
27 printk(BIOS_ERR, "Hybrid graphics: ERROR\n");
28 *enable_igd = true;
29 *enable_peg = false;
30 return;
31 }
32
33 config = dev->chip_info;
34 if (get_gpio(config->detect_gpio) == DGPU_NOT_INSTALLED) {
35 printk(BIOS_DEBUG, "Hybrid graphics:"
36 " No discrete GPU present.\n");
37 *enable_igd = true;
38 *enable_peg = false;
39 return;
40 }
41
42 mode = get_uint_option("hybrid_graphics_mode", HYBRID_GRAPHICS_DEFAULT_GPU);
43
44 if (mode == HYBRID_GRAPHICS_DISCRETE) {
45 printk(BIOS_DEBUG, "Hybrid graphics:"
46 " Disabling integrated GPU.\n");
47
48 *enable_igd = false;
49 *enable_peg = true;
50 } else if (mode == HYBRID_GRAPHICS_INTEGRATED) {
51 printk(BIOS_DEBUG, "Hybrid graphics:"
52 " Disabling discrete GPU.\n");
53
54 *enable_igd = true;
55 *enable_peg = false;
56 } else {
57 printk(BIOS_DEBUG, "Hybrid graphics:"
58 " Activating Switchable (both GPUs).\n");
59
60 *enable_igd = true;
61 *enable_peg = true;
62 }
63
64 /*
65 * Need to do power handling here as we know there's a dGPU.
66 * Support GPIO and Thinker1.
67 */
68 if (config->has_dgpu_power_gpio) {
69 if (*enable_peg)
70 set_gpio(config->dgpu_power_gpio,
71 !config->dgpu_power_off_lvl);
72 else
73 set_gpio(config->dgpu_power_gpio,
74 config->dgpu_power_off_lvl);
75 } else if (config->has_thinker1) {
76 bool power_en = pmh7_dgpu_power_state();
77 if (*enable_peg != power_en)
78 pmh7_dgpu_power_enable(!power_en);
79 } else {
80 printk(BIOS_ERR, "Hybrid graphics:"
81 " FIXME: dGPU power handling not implemented\n");
82 }
83 }
84