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path: root/drivers/video/efi.c
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Diffstat (limited to 'drivers/video/efi.c')
-rw-r--r--drivers/video/efi.c138
1 files changed, 103 insertions, 35 deletions
diff --git a/drivers/video/efi.c b/drivers/video/efi.c
index b11e42c0eb..28ac15ff61 100644
--- a/drivers/video/efi.c
+++ b/drivers/video/efi.c
@@ -5,6 +5,8 @@
* EFI framebuffer driver based on GOP
*/
+#define LOG_CATEGORY LOGC_EFI
+
#include <common.h>
#include <dm.h>
#include <efi_api.h>
@@ -50,7 +52,19 @@ static void efi_find_pixel_bits(u32 mask, u8 *pos, u8 *size)
*size = len;
}
-static int get_mode_info(struct vesa_mode_info *vesa)
+/**
+ * get_mode_info() - Ask EFI for the mode information
+ *
+ * Gets info from the graphics-output protocol
+ *
+ * @vesa: Place to put the mode information
+ * @fbp: Returns the address of the frame buffer
+ * @infop: Returns a pointer to the mode info
+ * Returns: 0 if OK, -ENOSYS if boot services are not available, -ENOTSUPP if
+ * the protocol is not supported by EFI
+ */
+static int get_mode_info(struct vesa_mode_info *vesa, u64 *fbp,
+ struct efi_gop_mode_info **infop)
{
efi_guid_t efi_gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
struct efi_boot_services *boot = efi_get_boot();
@@ -63,41 +77,70 @@ static int get_mode_info(struct vesa_mode_info *vesa)
ret = boot->locate_protocol(&efi_gop_guid, NULL, (void **)&gop);
if (ret)
return log_msg_ret("prot", -ENOTSUPP);
-
mode = gop->mode;
+ log_debug("maxmode %u, mode %u, info %p, size %lx, fb %lx, fb_size %lx\n",
+ mode->max_mode, mode->mode, mode->info, mode->info_size,
+ (ulong)mode->fb_base, (ulong)mode->fb_size);
+
vesa->phys_base_ptr = mode->fb_base;
+ *fbp = mode->fb_base;
vesa->x_resolution = mode->info->width;
vesa->y_resolution = mode->info->height;
+ *infop = mode->info;
return 0;
}
-static int save_vesa_mode(struct vesa_mode_info *vesa)
+/**
+ * get_mode_from_entry() - Obtain fb info from the EFIET_GOP_MODE payload entry
+ *
+ * This gets the mode information provided by the stub to the payload and puts
+ * it into a vesa structure. It also returns the mode information.
+ *
+ * @vesa: Place to put the mode information
+ * @fbp: Returns the address of the frame buffer
+ * @infop: Returns a pointer to the mode info
+ * Returns: 0 if OK, -ve on error
+ */
+static int get_mode_from_entry(struct vesa_mode_info *vesa, u64 *fbp,
+ struct efi_gop_mode_info **infop)
{
- struct efi_entry_gopmode *mode;
- const struct efi_framebuffer *fbinfo;
+ struct efi_gop_mode *mode;
int size;
int ret;
- if (IS_ENABLED(CONFIG_EFI_APP)) {
- ret = get_mode_info(vesa);
- if (ret) {
- printf("EFI graphics output protocol not found\n");
- return -ENXIO;
- }
- } else {
- ret = efi_info_get(EFIET_GOP_MODE, (void **)&mode, &size);
- if (ret == -ENOENT) {
- printf("EFI graphics output protocol mode not found\n");
- return -ENXIO;
- }
- vesa->phys_base_ptr = mode->fb_base;
- vesa->x_resolution = mode->info->width;
- vesa->y_resolution = mode->info->height;
+ ret = efi_info_get(EFIET_GOP_MODE, (void **)&mode, &size);
+ if (ret) {
+ printf("EFI graphics output entry not found\n");
+ return ret;
}
+ vesa->phys_base_ptr = mode->fb_base;
+ *fbp = mode->fb_base;
+ vesa->x_resolution = mode->info->width;
+ vesa->y_resolution = mode->info->height;
+ *infop = mode->info;
- if (mode->info->pixel_format < EFI_GOT_BITMASK) {
- fbinfo = &efi_framebuffer_format_map[mode->info->pixel_format];
+ return 0;
+}
+
+static int save_vesa_mode(struct vesa_mode_info *vesa, u64 *fbp)
+{
+ const struct efi_framebuffer *fbinfo;
+ struct efi_gop_mode_info *info;
+ int ret;
+
+ if (IS_ENABLED(CONFIG_EFI_APP))
+ ret = get_mode_info(vesa, fbp, &info);
+ else
+ ret = get_mode_from_entry(vesa, fbp, &info);
+ if (ret) {
+ printf("EFI graphics output protocol not found (err=%dE)\n",
+ ret);
+ return ret;
+ }
+
+ if (info->pixel_format < EFI_GOT_BITMASK) {
+ fbinfo = &efi_framebuffer_format_map[info->pixel_format];
vesa->red_mask_size = fbinfo->red.size;
vesa->red_mask_pos = fbinfo->red.pos;
vesa->green_mask_size = fbinfo->green.size;
@@ -108,29 +151,28 @@ static int save_vesa_mode(struct vesa_mode_info *vesa)
vesa->reserved_mask_pos = fbinfo->rsvd.pos;
vesa->bits_per_pixel = 32;
- vesa->bytes_per_scanline = mode->info->pixels_per_scanline * 4;
- } else if (mode->info->pixel_format == EFI_GOT_BITMASK) {
- efi_find_pixel_bits(mode->info->pixel_bitmask[0],
+ vesa->bytes_per_scanline = info->pixels_per_scanline * 4;
+ } else if (info->pixel_format == EFI_GOT_BITMASK) {
+ efi_find_pixel_bits(info->pixel_bitmask[0],
&vesa->red_mask_pos,
&vesa->red_mask_size);
- efi_find_pixel_bits(mode->info->pixel_bitmask[1],
+ efi_find_pixel_bits(info->pixel_bitmask[1],
&vesa->green_mask_pos,
&vesa->green_mask_size);
- efi_find_pixel_bits(mode->info->pixel_bitmask[2],
+ efi_find_pixel_bits(info->pixel_bitmask[2],
&vesa->blue_mask_pos,
&vesa->blue_mask_size);
- efi_find_pixel_bits(mode->info->pixel_bitmask[3],
+ efi_find_pixel_bits(info->pixel_bitmask[3],
&vesa->reserved_mask_pos,
&vesa->reserved_mask_size);
vesa->bits_per_pixel = vesa->red_mask_size +
vesa->green_mask_size +
vesa->blue_mask_size +
vesa->reserved_mask_size;
- vesa->bytes_per_scanline = (mode->info->pixels_per_scanline *
+ vesa->bytes_per_scanline = (info->pixels_per_scanline *
vesa->bits_per_pixel) / 8;
} else {
- debug("efi set unknown framebuffer format: %d\n",
- mode->info->pixel_format);
+ log_err("Unknown framebuffer format: %d\n", info->pixel_format);
return -EINVAL;
}
@@ -142,19 +184,20 @@ static int efi_video_probe(struct udevice *dev)
struct video_uc_plat *plat = dev_get_uclass_plat(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
struct vesa_mode_info *vesa = &mode_info.vesa;
+ u64 fb;
int ret;
/* Initialize vesa_mode_info structure */
- ret = save_vesa_mode(vesa);
+ ret = save_vesa_mode(vesa, &fb);
if (ret)
goto err;
- ret = vesa_setup_video_priv(vesa, uc_priv, plat);
+ ret = vesa_setup_video_priv(vesa, fb, uc_priv, plat);
if (ret)
goto err;
- printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
- vesa->bits_per_pixel);
+ printf("Video: %dx%dx%d @ %lx\n", uc_priv->xsize, uc_priv->ysize,
+ vesa->bits_per_pixel, (ulong)fb);
return 0;
@@ -163,6 +206,30 @@ err:
return ret;
}
+static int efi_video_bind(struct udevice *dev)
+{
+ if (IS_ENABLED(CONFIG_VIDEO_COPY)) {
+ struct video_uc_plat *plat = dev_get_uclass_plat(dev);
+ struct vesa_mode_info vesa;
+ int ret;
+ u64 fb;
+
+ /*
+ * Initialise vesa_mode_info structure so we can figure out the
+ * required framebuffer size. If something goes wrong, just do
+ * without a copy framebuffer
+ */
+ ret = save_vesa_mode(&vesa, &fb);
+ if (!ret) {
+ /* this is not reached if the EFI call failed */
+ plat->copy_size = vesa.bytes_per_scanline *
+ vesa.y_resolution;
+ }
+ }
+
+ return 0;
+}
+
static const struct udevice_id efi_video_ids[] = {
{ .compatible = "efi-fb" },
{ }
@@ -172,5 +239,6 @@ U_BOOT_DRIVER(efi_video) = {
.name = "efi_video",
.id = UCLASS_VIDEO,
.of_match = efi_video_ids,
+ .bind = efi_video_bind,
.probe = efi_video_probe,
};
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-31 06:42:21 +0000