1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2
3 #include <boot/coreboot_tables.h>
4 #include <console/console.h>
5 #include <elog.h>
6 #include <fsp/graphics.h>
7 #include <fsp/util.h>
8 #include <soc/intel/common/vbt.h>
9 #include <types.h>
10 #include <framebuffer_info.h>
11
12 enum pixel_format {
13 pixel_rgbx_8bpc = 0,
14 pixel_bgrx_8bpc = 1,
15 pixel_bitmask = 2, /* defined by <rgb>_mask values */
16 };
17
18 static const uint8_t fsp_graphics_info_guid[16] = {
19 0xce, 0x2c, 0xf6, 0x39, 0x25, 0x68, 0x69, 0x46,
20 0xbb, 0x56, 0x54, 0x1a, 0xba, 0x75, 0x3a, 0x07
21 };
22
23 struct hob_graphics_info {
24 uint64_t framebuffer_base;
25 uint32_t framebuffer_size;
26 uint32_t version;
27 uint32_t horizontal_resolution;
28 uint32_t vertical_resolution;
29 uint32_t pixel_format; /* See enum pixel_format */
30 uint32_t red_mask;
31 uint32_t green_mask;
32 uint32_t blue_mask;
33 uint32_t reserved_mask;
34 uint32_t pixels_per_scanline;
35 } __packed;
36
37 struct pixel {
38 uint8_t pos;
39 uint8_t size;
40 };
41
42 static const struct fsp_framebuffer {
43 struct pixel red;
44 struct pixel green;
45 struct pixel blue;
46 struct pixel rsvd;
47 } fsp_framebuffer_format_map[] = {
48 [pixel_rgbx_8bpc] = { {0, 8}, {8, 8}, {16, 8}, {24, 8} },
49 [pixel_bgrx_8bpc] = { {16, 8}, {8, 8}, {0, 8}, {24, 8} },
50 };
51
52 enum fw_splash_screen_status {
53 FW_SPLASH_SCREEN_DISABLED,
54 FW_SPLASH_SCREEN_ENABLED,
55 };
56
57 /* Check and report if an external display is attached */
fsp_soc_report_external_display(void)58 __weak int fsp_soc_report_external_display(void)
59 {
60 /* Default implementation, on-board display enabled */
61 return 0;
62 }
63
64 /*
65 * Update elog with Firmware Splash Screen related information
66 * based on enum fw_splash_screen_status.
67 *
68 * Possible values for input argument are:
69 * TRUE - FSP initializes display when BMP_LOGO config is enabled.
70 * FALSE - Failed to initialize display although BMP_LOGO config is selected.
71 *
72 * Ignore if BMP_LOGO config is not selected.
73 */
update_fw_splash_screen_event(enum fw_splash_screen_status status)74 static void update_fw_splash_screen_event(enum fw_splash_screen_status status)
75 {
76 if (!CONFIG(BMP_LOGO))
77 return;
78
79 printk(BIOS_DEBUG, "Firmware Splash Screen : %s\n",
80 status ? "Enabled" : "Disabled");
81
82 elog_add_event_byte(ELOG_TYPE_FW_SPLASH_SCREEN, status);
83 }
84
fsp_report_framebuffer_info(const uintptr_t framebuffer_bar,enum lb_fb_orientation orientation)85 void fsp_report_framebuffer_info(const uintptr_t framebuffer_bar,
86 enum lb_fb_orientation orientation)
87 {
88 size_t size;
89 const struct hob_graphics_info *ginfo;
90 const struct fsp_framebuffer *fbinfo;
91
92 /*
93 * Pci enumeration happens after silicon init.
94 * After enumeration graphic framebuffer base may be relocated.
95 */
96 if (!framebuffer_bar) {
97 printk(BIOS_ALERT, "Framebuffer BAR invalid\n");
98 update_fw_splash_screen_event(FW_SPLASH_SCREEN_DISABLED);
99 return;
100 }
101
102 ginfo = fsp_find_extension_hob_by_guid(fsp_graphics_info_guid, &size);
103
104 if (!ginfo) {
105 printk(BIOS_ALERT, "Graphics hand-off block not found\n");
106 update_fw_splash_screen_event(FW_SPLASH_SCREEN_DISABLED);
107 return;
108 }
109
110 if (ginfo->pixel_format >= ARRAY_SIZE(fsp_framebuffer_format_map)) {
111 printk(BIOS_ALERT, "FSP set unknown framebuffer format: %d\n",
112 ginfo->pixel_format);
113 update_fw_splash_screen_event(FW_SPLASH_SCREEN_DISABLED);
114 return;
115 }
116
117 update_fw_splash_screen_event(FW_SPLASH_SCREEN_ENABLED);
118 fbinfo = fsp_framebuffer_format_map + ginfo->pixel_format;
119
120 const struct lb_framebuffer fb = {
121 .physical_address = framebuffer_bar,
122 .x_resolution = ginfo->horizontal_resolution,
123 .y_resolution = ginfo->vertical_resolution,
124 .bytes_per_line = ginfo->pixels_per_scanline * 4,
125 .bits_per_pixel = fbinfo->rsvd.size + fbinfo->red.size +
126 fbinfo->green.size + fbinfo->blue.size,
127 .red_mask_pos = fbinfo->red.pos,
128 .red_mask_size = fbinfo->red.size,
129 .green_mask_pos = fbinfo->green.pos,
130 .green_mask_size = fbinfo->green.size,
131 .blue_mask_pos = fbinfo->blue.pos,
132 .blue_mask_size = fbinfo->blue.size,
133 .reserved_mask_pos = fbinfo->rsvd.pos,
134 .reserved_mask_size = fbinfo->rsvd.size,
135 .orientation = orientation,
136 .flags = {
137 .has_external_display = fsp_soc_report_external_display(),
138 },
139 };
140
141 fb_add_framebuffer_info_ex(&fb);
142 }
143