efi: Support a 64-bit frame buffer address

The current vesa structure only provides a 32-bit value for the frame
buffer. Many modern machines use an address outside the range.

It is still useful to have this common struct, but add a separate
frame-buffer address as well.

Add a comment for vesa_setup_video_priv() while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>

5 files changed, 45 insertions, 19 deletions

diff --git a/arch/x86/lib/fsp/fsp_graphics.c b/arch/x86/lib/fsp/fsp_graphics.c
index b07c666..2bcc49f 100644
--- a/arch/x86/lib/fsp/fsp_graphics.c
+++ b/arch/x86/lib/fsp/fsp_graphics.c
@@ -106,7 +106,7 @@ static int fsp_video_probe(struct udevice *dev)
 	vesa->phys_base_ptr = dm_pci_read_bar32(dev, 2);
 	gd->fb_base = vesa->phys_base_ptr;
 
-	ret = vesa_setup_video_priv(vesa, uc_priv, plat);
+	ret = vesa_setup_video_priv(vesa, vesa->phys_base_ptr, uc_priv, plat);
 	if (ret)
 		goto err;
 
diff --git a/drivers/pci/pci_rom.c b/drivers/pci/pci_rom.c
index 47b6e6e..f0dfe63 100644
--- a/drivers/pci/pci_rom.c
+++ b/drivers/pci/pci_rom.c
@@ -325,7 +325,7 @@ err:
 	return ret;
 }
 
-int vesa_setup_video_priv(struct vesa_mode_info *vesa,
+int vesa_setup_video_priv(struct vesa_mode_info *vesa, u64 fb,
 			  struct video_priv *uc_priv,
 			  struct video_uc_plat *plat)
 {
@@ -348,9 +348,9 @@ int vesa_setup_video_priv(struct vesa_mode_info *vesa,
 
 	/* Use double buffering if enabled */
 	if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
-		plat->copy_base = vesa->phys_base_ptr;
+		plat->copy_base = fb;
 	else
-		plat->base = vesa->phys_base_ptr;
+		plat->base = fb;
 	log_debug("base = %lx, copy_base = %lx\n", plat->base, plat->copy_base);
 	plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
 
@@ -377,7 +377,9 @@ int vesa_setup_video(struct udevice *dev, int (*int15_handler)(void))
 		return ret;
 	}
 
-	ret = vesa_setup_video_priv(&mode_info.vesa, uc_priv, plat);
+	ret = vesa_setup_video_priv(&mode_info.vesa,
+				    mode_info.vesa.phys_base_ptr, uc_priv,
+				    plat);
 	if (ret) {
 		if (ret == -ENFILE) {
 			/*
diff --git a/drivers/video/coreboot.c b/drivers/video/coreboot.c
index d2d87c7..c586475 100644
--- a/drivers/video/coreboot.c
+++ b/drivers/video/coreboot.c
@@ -57,7 +57,7 @@ static int coreboot_video_probe(struct udevice *dev)
 		goto err;
 	}
 
-	ret = vesa_setup_video_priv(vesa, uc_priv, plat);
+	ret = vesa_setup_video_priv(vesa, vesa->phys_base_ptr, uc_priv, plat);
 	if (ret) {
 		ret = log_msg_ret("setup", ret);
 		goto err;
diff --git a/drivers/video/efi.c b/drivers/video/efi.c
index 0479f20..169637c 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>
@@ -56,11 +58,12 @@ static void efi_find_pixel_bits(u32 mask, u8 *pos, u8 *size)
  * 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,
+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;
@@ -74,9 +77,13 @@ 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;
@@ -91,10 +98,11 @@ static int get_mode_info(struct vesa_mode_info *vesa,
  * 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,
+static int get_mode_from_entry(struct vesa_mode_info *vesa, u64 *fbp,
 			       struct efi_gop_mode_info **infop)
 {
 	struct efi_gop_mode *mode;
@@ -107,6 +115,7 @@ static int get_mode_from_entry(struct vesa_mode_info *vesa,
 		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;
@@ -114,16 +123,17 @@ static int get_mode_from_entry(struct vesa_mode_info *vesa,
 	return 0;
 }
 
-static int save_vesa_mode(struct vesa_mode_info *vesa)
+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;
 
+	printf("start\n");
 	if (IS_ENABLED(CONFIG_EFI_APP))
-		ret = get_mode_info(vesa, &info);
+		ret = get_mode_info(vesa, fbp, &info);
 	else
-		ret = get_mode_from_entry(vesa, &info);
+		ret = get_mode_from_entry(vesa, fbp, &info);
 	if (ret) {
 		printf("EFI graphics output protocol not found (err=%dE)\n",
 		       ret);
@@ -163,8 +173,7 @@ static int save_vesa_mode(struct vesa_mode_info *vesa)
 		vesa->bytes_per_scanline = (info->pixels_per_scanline *
 					    vesa->bits_per_pixel) / 8;
 	} else {
-		debug("efi set unknown framebuffer format: %d\n",
-		      info->pixel_format);
+		log_err("Unknown framebuffer format: %d\n", info->pixel_format);
 		return -EINVAL;
 	}
 
@@ -176,19 +185,20 @@ 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;
 
diff --git a/include/vesa.h b/include/vesa.h
index a42c179..9285bfa 100644
--- a/include/vesa.h
+++ b/include/vesa.h
@@ -108,7 +108,21 @@ extern struct vesa_state mode_info;
 
 struct video_priv;
 struct video_uc_plat;
-int vesa_setup_video_priv(struct vesa_mode_info *vesa,
+
+/**
+ * vesa_setup_video_priv() - Set up a video device using VESA information
+ *
+ * The vesa struct is used by various x86 drivers, so this is a common function
+ * to use it to set up the video.
+ *
+ * @vesa: Vesa information to use (vesa->phys_base_ptr is ignored)
+ * @fb: Frame buffer address (since vesa->phys_base_ptr is only 32 bits)
+ * @uc_priv: Video device's uclass-private information
+ * @plat: Video devices's uclass-private platform data
+ * Returns: 0 if OK, -ENXIO if the x resolution is 0, -EEPROTONOSUPPORT if the
+ * pixel format is not supported
+ */
+int vesa_setup_video_priv(struct vesa_mode_info *vesa, u64 fb,
 			  struct video_priv *uc_priv,
 			  struct video_uc_plat *plat);
 int vesa_setup_video(struct udevice *dev, int (*int15_handler)(void));