grub/grub-core/video/efi_gop.c
Vladimir 'phcoder' Serbinenko 621bed6990 * grub-core/video/efi_gop.c (grub_video_gop_setup): Fix a typo which
desactivated use of EDID at all.
2013-09-23 13:40:07 +02:00

622 lines
16 KiB
C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#define grub_video_render_target grub_video_fbrender_target
#include <grub/err.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/video.h>
#include <grub/video_fb.h>
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
#include <grub/efi/edid.h>
#include <grub/efi/graphics_output.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_efi_guid_t graphics_output_guid = GRUB_EFI_GOP_GUID;
static grub_efi_guid_t active_edid_guid = GRUB_EFI_EDID_ACTIVE_GUID;
static grub_efi_guid_t discovered_edid_guid = GRUB_EFI_EDID_DISCOVERED_GUID;
static grub_efi_guid_t efi_var_guid = GRUB_EFI_GLOBAL_VARIABLE_GUID;
static struct grub_efi_gop *gop;
static unsigned old_mode;
static int restore_needed;
static grub_efi_handle_t gop_handle;
static int
grub_video_gop_iterate (int (*hook) (const struct grub_video_mode_info *info, void *hook_arg), void *hook_arg);
static struct
{
struct grub_video_mode_info mode_info;
struct grub_video_render_target *render_target;
grub_uint8_t *ptr;
grub_uint8_t *offscreen;
} framebuffer;
static int
check_protocol_hook (const struct grub_video_mode_info *info __attribute__ ((unused)), void *hook_arg)
{
int *have_usable_mode = hook_arg;
*have_usable_mode = 1;
return 1;
}
static int
check_protocol (void)
{
grub_efi_handle_t *handles;
grub_efi_uintn_t num_handles, i;
int have_usable_mode = 0;
handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL,
&graphics_output_guid, NULL, &num_handles);
if (!handles || num_handles == 0)
return 0;
for (i = 0; i < num_handles; i++)
{
gop_handle = handles[i];
gop = grub_efi_open_protocol (gop_handle, &graphics_output_guid,
GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
grub_video_gop_iterate (check_protocol_hook, &have_usable_mode);
if (have_usable_mode)
{
grub_free (handles);
return 1;
}
}
gop = 0;
gop_handle = 0;
return 0;
}
static grub_err_t
grub_video_gop_init (void)
{
grub_memset (&framebuffer, 0, sizeof(framebuffer));
return grub_video_fb_init ();
}
static grub_err_t
grub_video_gop_fini (void)
{
if (restore_needed)
{
efi_call_2 (gop->set_mode, gop, old_mode);
restore_needed = 0;
}
grub_free (framebuffer.offscreen);
framebuffer.offscreen = 0;
return grub_video_fb_fini ();
}
static int
grub_video_gop_get_bpp (struct grub_efi_gop_mode_info *in)
{
grub_uint32_t total_mask;
int i;
switch (in->pixel_format)
{
case GRUB_EFI_GOT_BGRA8:
case GRUB_EFI_GOT_RGBA8:
return 32;
case GRUB_EFI_GOT_BITMASK:
/* Check overlaps. */
if ((in->pixel_bitmask.r & in->pixel_bitmask.g)
|| (in->pixel_bitmask.r & in->pixel_bitmask.b)
|| (in->pixel_bitmask.g & in->pixel_bitmask.b)
|| (in->pixel_bitmask.r & in->pixel_bitmask.a)
|| (in->pixel_bitmask.g & in->pixel_bitmask.a)
|| (in->pixel_bitmask.b & in->pixel_bitmask.a))
return 0;
total_mask = in->pixel_bitmask.r | in->pixel_bitmask.g
| in->pixel_bitmask.b | in->pixel_bitmask.a;
for (i = 31; i >= 0; i--)
if (total_mask & (1 << i))
return i + 1;
/* Fall through. */
default:
return 0;
}
}
static void
grub_video_gop_get_bitmask (grub_uint32_t mask, unsigned int *mask_size,
unsigned int *field_pos)
{
int i;
int last_p;
for (i = 31; i >= 0; i--)
if (mask & (1 << i))
break;
if (i == -1)
{
*mask_size = *field_pos = 0;
return;
}
last_p = i;
for (; i >= 0; i--)
if (!(mask & (1 << i)))
break;
*field_pos = i + 1;
*mask_size = last_p - *field_pos + 1;
}
static grub_err_t
grub_video_gop_fill_real_mode_info (unsigned mode,
struct grub_efi_gop_mode_info *in,
struct grub_video_mode_info *out)
{
out->mode_number = mode;
out->number_of_colors = 256;
out->width = in->width;
out->height = in->height;
out->mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
out->bpp = grub_video_gop_get_bpp (in);
out->bytes_per_pixel = out->bpp >> 3;
if (!out->bpp)
return grub_error (GRUB_ERR_IO, "unsupported video mode");
out->pitch = in->pixels_per_scanline * out->bytes_per_pixel;
switch (in->pixel_format)
{
case GRUB_EFI_GOT_RGBA8:
out->red_mask_size = 8;
out->red_field_pos = 0;
out->green_mask_size = 8;
out->green_field_pos = 8;
out->blue_mask_size = 8;
out->blue_field_pos = 16;
out->reserved_mask_size = 8;
out->reserved_field_pos = 24;
break;
case GRUB_EFI_GOT_BGRA8:
out->red_mask_size = 8;
out->red_field_pos = 16;
out->green_mask_size = 8;
out->green_field_pos = 8;
out->blue_mask_size = 8;
out->blue_field_pos = 0;
out->reserved_mask_size = 8;
out->reserved_field_pos = 24;
break;
case GRUB_EFI_GOT_BITMASK:
grub_video_gop_get_bitmask (in->pixel_bitmask.r, &out->red_mask_size,
&out->red_field_pos);
grub_video_gop_get_bitmask (in->pixel_bitmask.g, &out->green_mask_size,
&out->green_field_pos);
grub_video_gop_get_bitmask (in->pixel_bitmask.b, &out->blue_mask_size,
&out->blue_field_pos);
grub_video_gop_get_bitmask (in->pixel_bitmask.a, &out->reserved_mask_size,
&out->reserved_field_pos);
break;
default:
return grub_error (GRUB_ERR_IO, "unsupported video mode");
}
out->blit_format = grub_video_get_blit_format (out);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_gop_fill_mode_info (unsigned mode,
struct grub_efi_gop_mode_info *in,
struct grub_video_mode_info *out)
{
out->mode_number = mode;
out->number_of_colors = 256;
out->width = in->width;
out->height = in->height;
out->mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
out->bytes_per_pixel = sizeof (struct grub_efi_gop_blt_pixel);
out->bpp = out->bytes_per_pixel << 3;
out->pitch = in->width * out->bytes_per_pixel;
out->red_mask_size = 8;
out->red_field_pos = 16;
out->green_mask_size = 8;
out->green_field_pos = 8;
out->blue_mask_size = 8;
out->blue_field_pos = 0;
out->reserved_mask_size = 8;
out->reserved_field_pos = 24;
out->blit_format = GRUB_VIDEO_BLIT_FORMAT_BGRA_8888;
out->mode_type |= (GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
return GRUB_ERR_NONE;
}
static int
grub_video_gop_iterate (int (*hook) (const struct grub_video_mode_info *info, void *hook_arg), void *hook_arg)
{
unsigned mode;
for (mode = 0; mode < gop->mode->max_mode; mode++)
{
grub_efi_uintn_t size;
grub_efi_status_t status;
struct grub_efi_gop_mode_info *info = NULL;
grub_err_t err;
struct grub_video_mode_info mode_info;
status = efi_call_4 (gop->query_mode, gop, mode, &size, &info);
if (status)
{
info = 0;
continue;
}
err = grub_video_gop_fill_mode_info (mode, info, &mode_info);
if (err)
{
grub_errno = GRUB_ERR_NONE;
continue;
}
if (hook (&mode_info, hook_arg))
return 1;
}
return 0;
}
static grub_err_t
grub_video_gop_get_edid (struct grub_video_edid_info *edid_info)
{
struct grub_efi_active_edid *edid;
grub_size_t copy_size;
grub_memset (edid_info, 0, sizeof (*edid_info));
edid = grub_efi_open_protocol (gop_handle, &active_edid_guid,
GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (!edid || edid->size_of_edid == 0)
edid = grub_efi_open_protocol (gop_handle, &discovered_edid_guid,
GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (!edid || edid->size_of_edid == 0)
{
char edidname[] = "agp-internal-edid";
grub_size_t datasize;
grub_uint8_t *data;
data = grub_efi_get_variable (edidname, &efi_var_guid, &datasize);
if (data && datasize > 16)
{
copy_size = datasize - 16;
if (copy_size > sizeof (*edid_info))
copy_size = sizeof (*edid_info);
grub_memcpy (edid_info, data + 16, copy_size);
grub_free (data);
return GRUB_ERR_NONE;
}
return grub_error (GRUB_ERR_BAD_DEVICE, "EDID information not available");
}
copy_size = edid->size_of_edid;
if (copy_size > sizeof (*edid_info))
copy_size = sizeof (*edid_info);
grub_memcpy (edid_info, edid->edid, copy_size);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_gop_get_preferred_mode (unsigned int *width, unsigned int *height)
{
struct grub_video_edid_info edid_info;
grub_err_t err;
err = grub_video_gop_get_edid (&edid_info);
if (err)
return err;
err = grub_video_edid_checksum (&edid_info);
if (err)
return err;
err = grub_video_edid_preferred_mode (&edid_info, width, height);
if (err)
return err;
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_gop_setup (unsigned int width, unsigned int height,
unsigned int mode_type,
unsigned int mode_mask __attribute__ ((unused)))
{
unsigned int depth;
struct grub_efi_gop_mode_info *info = NULL;
unsigned best_mode = 0;
grub_err_t err;
unsigned bpp;
int found = 0;
unsigned long long best_volume = 0;
unsigned int preferred_width = 0, preferred_height = 0;
grub_uint8_t *buffer;
depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
>> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
if (width == 0 && height == 0)
{
err = grub_gop_get_preferred_mode (&preferred_width, &preferred_height);
if (err || preferred_width >= 4096 || preferred_height >= 4096)
{
preferred_width = 800;
preferred_height = 600;
grub_errno = GRUB_ERR_NONE;
}
}
/* Keep current mode if possible. */
if (gop->mode->info)
{
bpp = grub_video_gop_get_bpp (gop->mode->info);
if (bpp && ((width == gop->mode->info->width
&& height == gop->mode->info->height)
|| (width == 0 && height == 0))
&& (depth == bpp || depth == 0))
{
grub_dprintf ("video", "GOP: keeping mode %d\n", gop->mode->mode);
best_mode = gop->mode->mode;
found = 1;
}
}
if (!found)
{
unsigned mode;
grub_dprintf ("video", "GOP: %d modes detected\n", gop->mode->max_mode);
for (mode = 0; mode < gop->mode->max_mode; mode++)
{
grub_efi_uintn_t size;
grub_efi_status_t status;
status = efi_call_4 (gop->query_mode, gop, mode, &size, &info);
if (status)
{
info = 0;
continue;
}
grub_dprintf ("video", "GOP: mode %d: %dx%d\n", mode, info->width,
info->height);
if (preferred_width && (info->width > preferred_width
|| info->height > preferred_height))
{
grub_dprintf ("video", "GOP: mode %d: too large\n", mode);
continue;
}
bpp = grub_video_gop_get_bpp (info);
if (!bpp)
{
grub_dprintf ("video", "GOP: mode %d: incompatible pixel mode\n",
mode);
continue;
}
grub_dprintf ("video", "GOP: mode %d: depth %d\n", mode, bpp);
if (!(((info->width == width && info->height == height)
|| (width == 0 && height == 0))
&& (bpp == depth || depth == 0)))
{
grub_dprintf ("video", "GOP: mode %d: rejected\n", mode);
continue;
}
if (best_volume < ((unsigned long long) info->width)
* ((unsigned long long) info->height)
* ((unsigned long long) bpp))
{
best_volume = ((unsigned long long) info->width)
* ((unsigned long long) info->height)
* ((unsigned long long) bpp);
best_mode = mode;
}
found = 1;
}
}
if (!found)
{
grub_dprintf ("video", "GOP: no mode found\n");
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no matching mode found");
}
if (best_mode != gop->mode->mode)
{
if (!restore_needed)
{
old_mode = gop->mode->mode;
restore_needed = 1;
}
efi_call_2 (gop->set_mode, gop, best_mode);
}
info = gop->mode->info;
err = grub_video_gop_fill_mode_info (gop->mode->mode, info,
&framebuffer.mode_info);
if (err)
{
grub_dprintf ("video", "GOP: couldn't fill mode info\n");
return err;
}
framebuffer.ptr = (void *) (grub_addr_t) gop->mode->fb_base;
framebuffer.offscreen
= grub_malloc (framebuffer.mode_info.height
* framebuffer.mode_info.width
* sizeof (struct grub_efi_gop_blt_pixel));
buffer = framebuffer.offscreen;
if (!buffer)
{
grub_dprintf ("video", "GOP: couldn't allocate shadow\n");
grub_errno = 0;
err = grub_video_gop_fill_mode_info (gop->mode->mode, info,
&framebuffer.mode_info);
buffer = framebuffer.ptr;
}
grub_dprintf ("video", "GOP: initialising FB @ %p %dx%dx%d\n",
framebuffer.ptr, framebuffer.mode_info.width,
framebuffer.mode_info.height, framebuffer.mode_info.bpp);
err = grub_video_fb_create_render_target_from_pointer
(&framebuffer.render_target, &framebuffer.mode_info, buffer);
if (err)
{
grub_dprintf ("video", "GOP: Couldn't create FB target\n");
return err;
}
err = grub_video_fb_set_active_render_target (framebuffer.render_target);
if (err)
{
grub_dprintf ("video", "GOP: Couldn't set FB target\n");
return err;
}
err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
grub_video_fbstd_colors);
if (err)
grub_dprintf ("video", "GOP: Couldn't set palette\n");
else
grub_dprintf ("video", "GOP: Success\n");
return err;
}
static grub_err_t
grub_video_gop_swap_buffers (void)
{
if (framebuffer.offscreen)
{
efi_call_10 (gop->blt, gop, framebuffer.offscreen,
GRUB_EFI_BLT_BUFFER_TO_VIDEO, 0, 0, 0, 0,
framebuffer.mode_info.width, framebuffer.mode_info.height,
framebuffer.mode_info.width * 4);
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_gop_set_active_render_target (struct grub_video_render_target *target)
{
if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
target = framebuffer.render_target;
return grub_video_fb_set_active_render_target (target);
}
static grub_err_t
grub_video_gop_get_info_and_fini (struct grub_video_mode_info *mode_info,
void **framebuf)
{
grub_err_t err;
err = grub_video_gop_fill_real_mode_info (gop->mode->mode, gop->mode->info,
mode_info);
if (err)
{
grub_dprintf ("video", "GOP: couldn't fill mode info\n");
return err;
}
*framebuf = (char *) framebuffer.ptr;
grub_video_fb_fini ();
grub_free (framebuffer.offscreen);
framebuffer.offscreen = 0;
return GRUB_ERR_NONE;
}
static struct grub_video_adapter grub_video_gop_adapter =
{
.name = "EFI GOP driver",
.id = GRUB_VIDEO_DRIVER_EFI_GOP,
.prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE,
.init = grub_video_gop_init,
.fini = grub_video_gop_fini,
.setup = grub_video_gop_setup,
.get_info = grub_video_fb_get_info,
.get_info_and_fini = grub_video_gop_get_info_and_fini,
.get_edid = grub_video_gop_get_edid,
.set_palette = grub_video_fb_set_palette,
.get_palette = grub_video_fb_get_palette,
.set_viewport = grub_video_fb_set_viewport,
.get_viewport = grub_video_fb_get_viewport,
.map_color = grub_video_fb_map_color,
.map_rgb = grub_video_fb_map_rgb,
.map_rgba = grub_video_fb_map_rgba,
.unmap_color = grub_video_fb_unmap_color,
.fill_rect = grub_video_fb_fill_rect,
.blit_bitmap = grub_video_fb_blit_bitmap,
.blit_render_target = grub_video_fb_blit_render_target,
.scroll = grub_video_fb_scroll,
.swap_buffers = grub_video_gop_swap_buffers,
.create_render_target = grub_video_fb_create_render_target,
.delete_render_target = grub_video_fb_delete_render_target,
.set_active_render_target = grub_video_gop_set_active_render_target,
.get_active_render_target = grub_video_fb_get_active_render_target,
.iterate = grub_video_gop_iterate,
.next = 0
};
GRUB_MOD_INIT(efi_gop)
{
if (check_protocol ())
grub_video_register (&grub_video_gop_adapter);
}
GRUB_MOD_FINI(efi_gop)
{
if (restore_needed)
{
efi_call_2 (gop->set_mode, gop, old_mode);
restore_needed = 0;
}
if (gop)
grub_video_unregister (&grub_video_gop_adapter);
}