1 // SPDX-License-Identifier: GPL-2.0+
3 * EFI application disk support
5 * Copyright (c) 2016 Alexander Graf
10 #include <efi_loader.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 static const efi_guid_t efi_gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
20 * struct efi_gop_obj - graphical output protocol object
22 * @header: EFI object header
23 * @ops: graphical output protocol interface
24 * @info: graphical output mode information
25 * @mode: graphical output mode
26 * @bpix: bits per pixel
30 struct efi_object header;
32 struct efi_gop_mode_info info;
33 struct efi_gop_mode mode;
34 /* Fields we only have access to during init */
39 static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
40 efi_uintn_t *size_of_info,
41 struct efi_gop_mode_info **info)
43 struct efi_gop_obj *gopobj;
44 efi_status_t ret = EFI_SUCCESS;
46 EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);
48 if (!this || !size_of_info || !info || mode_number) {
49 ret = EFI_INVALID_PARAMETER;
53 gopobj = container_of(this, struct efi_gop_obj, ops);
54 ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, sizeof(gopobj->info),
56 if (ret != EFI_SUCCESS)
58 *size_of_info = sizeof(gopobj->info);
59 memcpy(*info, &gopobj->info, sizeof(gopobj->info));
65 static __always_inline struct efi_gop_pixel efi_vid16_to_blt_col(u16 vid)
67 struct efi_gop_pixel blt = {
71 blt.blue = (vid & 0x1f) << 3;
73 blt.green = (vid & 0x3f) << 2;
75 blt.red = (vid & 0x1f) << 3;
79 static __always_inline u16 efi_blt_col_to_vid16(struct efi_gop_pixel *blt)
81 return (u16)(blt->red >> 3) << 11 |
82 (u16)(blt->green >> 2) << 5 |
83 (u16)(blt->blue >> 3);
86 static __always_inline efi_status_t gop_blt_int(struct efi_gop *this,
87 struct efi_gop_pixel *bufferp,
88 u32 operation, efi_uintn_t sx,
89 efi_uintn_t sy, efi_uintn_t dx,
96 struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
97 efi_uintn_t i, j, linelen, slineoff = 0, dlineoff, swidth, dwidth;
98 u32 *fb32 = gopobj->fb;
99 u16 *fb16 = gopobj->fb;
100 struct efi_gop_pixel *buffer = __builtin_assume_aligned(bufferp, 4);
103 /* Check for 4 byte alignment */
105 return EFI_INVALID_PARAMETER;
106 linelen = delta >> 2;
111 /* Check source rectangle */
113 case EFI_BLT_VIDEO_FILL:
115 case EFI_BLT_BUFFER_TO_VIDEO:
116 if (sx + width > linelen)
117 return EFI_INVALID_PARAMETER;
119 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
120 case EFI_BLT_VIDEO_TO_VIDEO:
121 if (sx + width > gopobj->info.width ||
122 sy + height > gopobj->info.height)
123 return EFI_INVALID_PARAMETER;
126 return EFI_INVALID_PARAMETER;
129 /* Check destination rectangle */
131 case EFI_BLT_VIDEO_FILL:
132 case EFI_BLT_BUFFER_TO_VIDEO:
133 case EFI_BLT_VIDEO_TO_VIDEO:
134 if (dx + width > gopobj->info.width ||
135 dy + height > gopobj->info.height)
136 return EFI_INVALID_PARAMETER;
138 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
139 if (dx + width > linelen)
140 return EFI_INVALID_PARAMETER;
144 /* Calculate line width */
146 case EFI_BLT_BUFFER_TO_VIDEO:
149 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
150 case EFI_BLT_VIDEO_TO_VIDEO:
151 swidth = gopobj->info.width;
153 return EFI_UNSUPPORTED;
155 case EFI_BLT_VIDEO_FILL:
161 case EFI_BLT_BUFFER_TO_VIDEO:
162 case EFI_BLT_VIDEO_FILL:
163 case EFI_BLT_VIDEO_TO_VIDEO:
164 dwidth = gopobj->info.width;
166 return EFI_UNSUPPORTED;
168 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
173 slineoff = swidth * sy;
174 dlineoff = dwidth * dy;
175 for (i = 0; i < height; i++) {
176 for (j = 0; j < width; j++) {
177 struct efi_gop_pixel pix;
179 /* Read source pixel */
181 case EFI_BLT_VIDEO_FILL:
184 case EFI_BLT_BUFFER_TO_VIDEO:
185 pix = buffer[slineoff + j + sx];
187 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
188 case EFI_BLT_VIDEO_TO_VIDEO:
190 pix = *(struct efi_gop_pixel *)&fb32[
193 pix = efi_vid16_to_blt_col(fb16[
198 /* Write destination pixel */
200 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
201 buffer[dlineoff + j + dx] = pix;
203 case EFI_BLT_BUFFER_TO_VIDEO:
204 case EFI_BLT_VIDEO_FILL:
205 case EFI_BLT_VIDEO_TO_VIDEO:
207 fb32[dlineoff + j + dx] = *(u32 *)&pix;
209 fb16[dlineoff + j + dx] =
210 efi_blt_col_to_vid16(&pix);
221 static efi_uintn_t gop_get_bpp(struct efi_gop *this)
223 struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
224 efi_uintn_t vid_bpp = 0;
226 switch (gopobj->bpix) {
227 #ifdef CONFIG_DM_VIDEO
234 #ifdef CONFIG_DM_VIDEO
247 * GCC can't optimize our BLT function well, but we need to make sure that
248 * our 2-dimensional loop gets executed very quickly, otherwise the system
251 * By manually putting all obvious branch targets into functions which call
252 * our generic BLT function with constants, the compiler can successfully
253 * optimize for speed.
255 static efi_status_t gop_blt_video_fill(struct efi_gop *this,
256 struct efi_gop_pixel *buffer,
257 u32 foo, efi_uintn_t sx,
258 efi_uintn_t sy, efi_uintn_t dx,
259 efi_uintn_t dy, efi_uintn_t width,
260 efi_uintn_t height, efi_uintn_t delta,
263 return gop_blt_int(this, buffer, EFI_BLT_VIDEO_FILL, sx, sy, dx,
264 dy, width, height, delta, vid_bpp);
267 static efi_status_t gop_blt_buf_to_vid16(struct efi_gop *this,
268 struct efi_gop_pixel *buffer,
269 u32 foo, efi_uintn_t sx,
270 efi_uintn_t sy, efi_uintn_t dx,
271 efi_uintn_t dy, efi_uintn_t width,
272 efi_uintn_t height, efi_uintn_t delta)
274 return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
275 dy, width, height, delta, 16);
278 static efi_status_t gop_blt_buf_to_vid32(struct efi_gop *this,
279 struct efi_gop_pixel *buffer,
280 u32 foo, efi_uintn_t sx,
281 efi_uintn_t sy, efi_uintn_t dx,
282 efi_uintn_t dy, efi_uintn_t width,
283 efi_uintn_t height, efi_uintn_t delta)
285 return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
286 dy, width, height, delta, 32);
289 static efi_status_t gop_blt_vid_to_vid(struct efi_gop *this,
290 struct efi_gop_pixel *buffer,
291 u32 foo, efi_uintn_t sx,
292 efi_uintn_t sy, efi_uintn_t dx,
293 efi_uintn_t dy, efi_uintn_t width,
294 efi_uintn_t height, efi_uintn_t delta,
297 return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_VIDEO, sx, sy, dx,
298 dy, width, height, delta, vid_bpp);
301 static efi_status_t gop_blt_vid_to_buf(struct efi_gop *this,
302 struct efi_gop_pixel *buffer,
303 u32 foo, efi_uintn_t sx,
304 efi_uintn_t sy, efi_uintn_t dx,
305 efi_uintn_t dy, efi_uintn_t width,
306 efi_uintn_t height, efi_uintn_t delta,
309 return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_BLT_BUFFER, sx, sy,
310 dx, dy, width, height, delta, vid_bpp);
314 * gop_set_mode() - set graphical output mode
316 * This function implements the SetMode() service.
318 * See the Unified Extensible Firmware Interface (UEFI) specification for
321 * @this: the graphical output protocol
322 * @mode_number: the mode to be set
323 * Return: status code
325 static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
327 struct efi_gop_obj *gopobj;
328 struct efi_gop_pixel buffer = {0, 0, 0, 0};
330 efi_status_t ret = EFI_SUCCESS;
332 EFI_ENTRY("%p, %x", this, mode_number);
335 ret = EFI_INVALID_PARAMETER;
339 ret = EFI_UNSUPPORTED;
342 gopobj = container_of(this, struct efi_gop_obj, ops);
343 vid_bpp = gop_get_bpp(this);
344 ret = gop_blt_video_fill(this, &buffer, EFI_BLT_VIDEO_FILL, 0, 0, 0, 0,
345 gopobj->info.width, gopobj->info.height, 0,
348 return EFI_EXIT(ret);
354 * This function implements the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL.
355 * See the Unified Extensible Firmware Interface (UEFI) specification for
358 * @this: EFI_GRAPHICS_OUTPUT_PROTOCOL
359 * @buffer: pixel buffer
360 * @sx: source x-coordinate
361 * @sy: source y-coordinate
362 * @dx: destination x-coordinate
363 * @dy: destination y-coordinate
364 * @width: width of rectangle
365 * @height: height of rectangle
366 * @delta: length in bytes of a line in the pixel buffer (optional)
367 * @return: status code
369 efi_status_t EFIAPI gop_blt(struct efi_gop *this, struct efi_gop_pixel *buffer,
370 u32 operation, efi_uintn_t sx,
371 efi_uintn_t sy, efi_uintn_t dx,
372 efi_uintn_t dy, efi_uintn_t width,
373 efi_uintn_t height, efi_uintn_t delta)
375 efi_status_t ret = EFI_INVALID_PARAMETER;
378 EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
379 buffer, operation, sx, sy, dx, dy, width, height, delta);
381 vid_bpp = gop_get_bpp(this);
383 /* Allow for compiler optimization */
385 case EFI_BLT_VIDEO_FILL:
386 ret = gop_blt_video_fill(this, buffer, operation, sx, sy, dx,
387 dy, width, height, delta, vid_bpp);
389 case EFI_BLT_BUFFER_TO_VIDEO:
390 /* This needs to be super-fast, so duplicate for 16/32bpp */
392 ret = gop_blt_buf_to_vid32(this, buffer, operation, sx,
393 sy, dx, dy, width, height,
396 ret = gop_blt_buf_to_vid16(this, buffer, operation, sx,
397 sy, dx, dy, width, height,
400 case EFI_BLT_VIDEO_TO_VIDEO:
401 ret = gop_blt_vid_to_vid(this, buffer, operation, sx, sy, dx,
402 dy, width, height, delta, vid_bpp);
404 case EFI_BLT_VIDEO_TO_BLT_BUFFER:
405 ret = gop_blt_vid_to_buf(this, buffer, operation, sx, sy, dx,
406 dy, width, height, delta, vid_bpp);
409 ret = EFI_INVALID_PARAMETER;
412 if (ret != EFI_SUCCESS)
413 return EFI_EXIT(ret);
415 #ifdef CONFIG_DM_VIDEO
421 return EFI_EXIT(EFI_SUCCESS);
425 * Install graphical output protocol.
427 * If no supported video device exists this is not considered as an
430 efi_status_t efi_gop_register(void)
432 struct efi_gop_obj *gopobj;
434 u64 fb_base, fb_size;
438 #ifdef CONFIG_DM_VIDEO
439 struct udevice *vdev;
440 struct video_priv *priv;
442 /* We only support a single video output device for now */
443 if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev) {
444 debug("WARNING: No video device\n");
448 priv = dev_get_uclass_priv(vdev);
450 col = video_get_xsize(vdev);
451 row = video_get_ysize(vdev);
452 fb_base = (uintptr_t)priv->fb;
453 fb_size = priv->fb_size;
458 bpix = panel_info.vl_bpix;
459 col = panel_info.vl_col;
460 row = panel_info.vl_row;
461 fb_base = gd->fb_base;
462 fb_size = lcd_get_size(&line_len);
463 fb = (void*)gd->fb_base;
467 #ifdef CONFIG_DM_VIDEO
476 /* So far, we only work in 16 or 32 bit mode */
477 debug("WARNING: Unsupported video mode\n");
481 gopobj = calloc(1, sizeof(*gopobj));
483 printf("ERROR: Out of memory\n");
484 return EFI_OUT_OF_RESOURCES;
487 /* Hook up to the device list */
488 efi_add_handle(&gopobj->header);
490 /* Fill in object data */
491 ret = efi_add_protocol(&gopobj->header, &efi_gop_guid,
493 if (ret != EFI_SUCCESS) {
494 printf("ERROR: Failure adding GOP protocol\n");
497 gopobj->ops.query_mode = gop_query_mode;
498 gopobj->ops.set_mode = gop_set_mode;
499 gopobj->ops.blt = gop_blt;
500 gopobj->ops.mode = &gopobj->mode;
502 gopobj->mode.max_mode = 1;
503 gopobj->mode.info = &gopobj->info;
504 gopobj->mode.info_size = sizeof(gopobj->info);
506 gopobj->mode.fb_base = fb_base;
507 gopobj->mode.fb_size = fb_size;
509 gopobj->info.version = 0;
510 gopobj->info.width = col;
511 gopobj->info.height = row;
512 #ifdef CONFIG_DM_VIDEO
513 if (bpix == VIDEO_BPP32)
515 if (bpix == LCD_COLOR32)
518 gopobj->info.pixel_format = EFI_GOT_BGRA8;
520 gopobj->info.pixel_format = EFI_GOT_BITMASK;
521 gopobj->info.pixel_bitmask[0] = 0xf800; /* red */
522 gopobj->info.pixel_bitmask[1] = 0x07e0; /* green */
523 gopobj->info.pixel_bitmask[2] = 0x001f; /* blue */
525 gopobj->info.pixels_per_scanline = col;