#include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */
#include <drm/drm_connector.h> /* For DRM_MODE_PANEL_ORIENTATION_* */
+ struct bmp_file_header {
+ u16 id;
+ u32 file_size;
+ u32 reserved;
+ u32 bitmap_offset;
+ } __packed;
+
+ struct bmp_dib_header {
+ u32 dib_header_size;
+ s32 width;
+ s32 height;
+ u16 planes;
+ u16 bpp;
+ u32 compression;
+ u32 bitmap_size;
+ u32 horz_resolution;
+ u32 vert_resolution;
+ u32 colors_used;
+ u32 colors_important;
+ } __packed;
+
static bool request_mem_succeeded = false;
-static bool nowc = false;
+static u64 mem_flags = EFI_MEMORY_WC | EFI_MEMORY_UC;
static struct fb_var_screeninfo efifb_defined = {
.activate = FB_ACTIVATE_NOW,
return 0;
}
+ /*
+ * If fbcon deffered console takeover is configured, the intent is for the
+ * framebuffer to show the boot graphics (e.g. vendor logo) until there is some
+ * (error) message to display. But the boot graphics may have been destroyed by
+ * e.g. option ROM output, detect this and restore the boot graphics.
+ */
+ #if defined CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER && \
+ defined CONFIG_ACPI_BGRT
+ static void efifb_copy_bmp(u8 *src, u32 *dst, int width, struct screen_info *si)
+ {
+ u8 r, g, b;
+
+ while (width--) {
+ b = *src++;
+ g = *src++;
+ r = *src++;
+ *dst++ = (r << si->red_pos) |
+ (g << si->green_pos) |
+ (b << si->blue_pos);
+ }
+ }
+
+ #ifdef CONFIG_X86
+ /*
+ * On x86 some firmwares use a low non native resolution for the display when
+ * they have shown some text messages. While keeping the bgrt filled with info
+ * for the native resolution. If the bgrt image intended for the native
+ * resolution still fits, it will be displayed very close to the right edge of
+ * the display looking quite bad. This function checks for this.
+ */
+ static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width)
+ {
+ static const int default_resolutions[][2] = {
+ { 800, 600 },
+ { 1024, 768 },
+ { 1280, 1024 },
+ };
+ u32 i, right_margin;
+
+ for (i = 0; i < ARRAY_SIZE(default_resolutions); i++) {
+ if (default_resolutions[i][0] == si->lfb_width &&
+ default_resolutions[i][1] == si->lfb_height)
+ break;
+ }
+ /* If not a default resolution used for textmode, this should be fine */
+ if (i >= ARRAY_SIZE(default_resolutions))
+ return true;
+
+ /* If the right margin is 5 times smaller then the left one, reject */
+ right_margin = si->lfb_width - (bgrt_tab.image_offset_x + bmp_width);
+ if (right_margin < (bgrt_tab.image_offset_x / 5))
+ return false;
+
+ return true;
+ }
+ #else
+ static bool efifb_bgrt_sanity_check(struct screen_info *si, u32 bmp_width)
+ {
+ return true;
+ }
+ #endif
+
+ static void efifb_show_boot_graphics(struct fb_info *info)
+ {
+ u32 bmp_width, bmp_height, bmp_pitch, screen_pitch, dst_x, y, src_y;
+ struct screen_info *si = &screen_info;
+ struct bmp_file_header *file_header;
+ struct bmp_dib_header *dib_header;
+ void *bgrt_image = NULL;
+ u8 *dst = info->screen_base;
+
+ if (!bgrt_tab.image_address) {
+ pr_info("efifb: No BGRT, not showing boot graphics\n");
+ return;
+ }
+
+ /* Avoid flashing the logo if we're going to print std probe messages */
+ if (console_loglevel > CONSOLE_LOGLEVEL_QUIET)
+ return;
+
+ /* bgrt_tab.status is unreliable, so we don't check it */
+
+ if (si->lfb_depth != 32) {
+ pr_info("efifb: not 32 bits, not showing boot graphics\n");
+ return;
+ }
+
+ bgrt_image = memremap(bgrt_tab.image_address, bgrt_image_size,
+ MEMREMAP_WB);
+ if (!bgrt_image) {
+ pr_warn("efifb: Ignoring BGRT: failed to map image memory\n");
+ return;
+ }
+
+ if (bgrt_image_size < (sizeof(*file_header) + sizeof(*dib_header)))
+ goto error;
+
+ file_header = bgrt_image;
+ if (file_header->id != 0x4d42 || file_header->reserved != 0)
+ goto error;
+
+ dib_header = bgrt_image + sizeof(*file_header);
+ if (dib_header->dib_header_size != 40 || dib_header->width < 0 ||
+ dib_header->planes != 1 || dib_header->bpp != 24 ||
+ dib_header->compression != 0)
+ goto error;
+
+ bmp_width = dib_header->width;
+ bmp_height = abs(dib_header->height);
+ bmp_pitch = round_up(3 * bmp_width, 4);
+ screen_pitch = si->lfb_linelength;
+
+ if ((file_header->bitmap_offset + bmp_pitch * bmp_height) >
+ bgrt_image_size)
+ goto error;
+
+ if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width ||
+ (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height)
+ goto error;
+
+ if (!efifb_bgrt_sanity_check(si, bmp_width))
+ goto error;
+
+ pr_info("efifb: showing boot graphics\n");
+
+ for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) {
+ /* Only background? */
+ if (y < bgrt_tab.image_offset_y ||
+ y >= (bgrt_tab.image_offset_y + bmp_height)) {
+ memset(dst, 0, 4 * si->lfb_width);
+ continue;
+ }
+
+ src_y = y - bgrt_tab.image_offset_y;
+ /* Positive header height means upside down row order */
+ if (dib_header->height > 0)
+ src_y = (bmp_height - 1) - src_y;
+
+ memset(dst, 0, bgrt_tab.image_offset_x * 4);
+ dst_x = bgrt_tab.image_offset_x;
+ efifb_copy_bmp(bgrt_image + file_header->bitmap_offset +
+ src_y * bmp_pitch,
+ (u32 *)dst + dst_x, bmp_width, si);
+ dst_x += bmp_width;
+ memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4);
+ }
+
+ memunmap(bgrt_image);
+ return;
+
+ error:
+ memunmap(bgrt_image);
+ pr_warn("efifb: Ignoring BGRT: unexpected or invalid BMP data\n");
+ }
+ #else
+ static inline void efifb_show_boot_graphics(struct fb_info *info) {}
+ #endif
+
static void efifb_destroy(struct fb_info *info)
{
- if (info->screen_base)
- iounmap(info->screen_base);
+ if (info->screen_base) {
+ if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC))
+ iounmap(info->screen_base);
+ else
+ memunmap(info->screen_base);
+ }
if (request_mem_succeeded)
release_mem_region(info->apertures->ranges[0].base,
info->apertures->ranges[0].size);
projects / kernel.git / commitdiff