1 /* -----------------------------------------------------------------------
3 * Copyright 2011 Intel Corporation; author Matt Fleming
5 * This file is part of the Linux kernel, and is made available under
6 * the terms of the GNU General Public License version 2.
8 * ----------------------------------------------------------------------- */
10 #include <linux/efi.h>
11 #include <linux/screen_info.h>
13 #include <asm/setup.h>
15 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
23 while (!(mask & 0x1)) {
39 setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
40 struct efi_pixel_bitmask pixel_info, int pixel_format)
42 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
44 si->lfb_linelength = pixels_per_scan_line * 4;
53 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
55 si->lfb_linelength = pixels_per_scan_line * 4;
64 } else if (pixel_format == PIXEL_BIT_MASK) {
65 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
66 find_bits(pixel_info.green_mask, &si->green_pos,
68 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
69 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
71 si->lfb_depth = si->red_size + si->green_size +
72 si->blue_size + si->rsvd_size;
73 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
76 si->lfb_linelength = si->lfb_width / 2;
89 setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si,
90 efi_guid_t *proto, unsigned long size, void **gop_handle)
92 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
93 unsigned long nr_gops;
95 u32 pixels_per_scan_line;
98 struct efi_pixel_bitmask pixel_info;
101 u32 *handles = (u32 *)(unsigned long)gop_handle;
107 nr_gops = size / sizeof(u32);
108 for (i = 0; i < nr_gops; i++) {
109 struct efi_graphics_output_protocol_mode_32 *mode;
110 struct efi_graphics_output_mode_info *info = NULL;
111 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
112 bool conout_found = false;
114 efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
117 status = efi_call_early(handle_protocol, h,
118 proto, (void **)&gop32);
119 if (status != EFI_SUCCESS)
122 status = efi_call_early(handle_protocol, h,
123 &conout_proto, &dummy);
124 if (status == EFI_SUCCESS)
127 mode = (void *)(unsigned long)gop32->mode;
128 info = (void *)(unsigned long)mode->info;
129 current_fb_base = mode->frame_buffer_base;
131 if ((!first_gop || conout_found) &&
132 info->pixel_format != PIXEL_BLT_ONLY) {
134 * Systems that use the UEFI Console Splitter may
135 * provide multiple GOP devices, not all of which are
136 * backed by real hardware. The workaround is to search
137 * for a GOP implementing the ConOut protocol, and if
138 * one isn't found, to just fall back to the first GOP.
140 width = info->horizontal_resolution;
141 height = info->vertical_resolution;
142 pixel_format = info->pixel_format;
143 pixel_info = info->pixel_information;
144 pixels_per_scan_line = info->pixels_per_scan_line;
145 fb_base = current_fb_base;
148 * Once we've found a GOP supporting ConOut,
149 * don't bother looking any further.
157 /* Did we find any GOPs? */
159 return EFI_NOT_FOUND;
161 /* EFI framebuffer */
162 si->orig_video_isVGA = VIDEO_TYPE_EFI;
164 si->lfb_width = width;
165 si->lfb_height = height;
166 si->lfb_base = fb_base;
168 ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
170 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
171 si->ext_lfb_base = ext_lfb_base;
176 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
178 si->lfb_size = si->lfb_linelength * si->lfb_height;
180 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
186 setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
187 efi_guid_t *proto, unsigned long size, void **gop_handle)
189 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
190 unsigned long nr_gops;
192 u32 pixels_per_scan_line;
195 struct efi_pixel_bitmask pixel_info;
198 u64 *handles = (u64 *)(unsigned long)gop_handle;
204 nr_gops = size / sizeof(u64);
205 for (i = 0; i < nr_gops; i++) {
206 struct efi_graphics_output_protocol_mode_64 *mode;
207 struct efi_graphics_output_mode_info *info = NULL;
208 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
209 bool conout_found = false;
211 efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
214 status = efi_call_early(handle_protocol, h,
215 proto, (void **)&gop64);
216 if (status != EFI_SUCCESS)
219 status = efi_call_early(handle_protocol, h,
220 &conout_proto, &dummy);
221 if (status == EFI_SUCCESS)
224 mode = (void *)(unsigned long)gop64->mode;
225 info = (void *)(unsigned long)mode->info;
226 current_fb_base = mode->frame_buffer_base;
228 if ((!first_gop || conout_found) &&
229 info->pixel_format != PIXEL_BLT_ONLY) {
231 * Systems that use the UEFI Console Splitter may
232 * provide multiple GOP devices, not all of which are
233 * backed by real hardware. The workaround is to search
234 * for a GOP implementing the ConOut protocol, and if
235 * one isn't found, to just fall back to the first GOP.
237 width = info->horizontal_resolution;
238 height = info->vertical_resolution;
239 pixel_format = info->pixel_format;
240 pixel_info = info->pixel_information;
241 pixels_per_scan_line = info->pixels_per_scan_line;
242 fb_base = current_fb_base;
245 * Once we've found a GOP supporting ConOut,
246 * don't bother looking any further.
254 /* Did we find any GOPs? */
256 return EFI_NOT_FOUND;
258 /* EFI framebuffer */
259 si->orig_video_isVGA = VIDEO_TYPE_EFI;
261 si->lfb_width = width;
262 si->lfb_height = height;
263 si->lfb_base = fb_base;
265 ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
267 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
268 si->ext_lfb_base = ext_lfb_base;
273 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
275 si->lfb_size = si->lfb_linelength * si->lfb_height;
277 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
283 * See if we have Graphics Output Protocol
285 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
286 struct screen_info *si, efi_guid_t *proto,
290 void **gop_handle = NULL;
292 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
293 size, (void **)&gop_handle);
294 if (status != EFI_SUCCESS)
297 status = efi_call_early(locate_handle,
298 EFI_LOCATE_BY_PROTOCOL,
299 proto, NULL, &size, gop_handle);
300 if (status != EFI_SUCCESS)
303 if (efi_is_64bit()) {
304 status = setup_gop64(sys_table_arg, si, proto, size,
307 status = setup_gop32(sys_table_arg, si, proto, size,
312 efi_call_early(free_pool, gop_handle);