video: bochs: Support a copy buffer

Provide support for using CONFIG_VIDEO_COPY with bochs, since this can
help to reduce flicker with QEMU

Signed-off-by: Simon Glass <sjg@chromium.org>
Series-to: u-boot
Series-links: 1:458274

boot/bootflow.c

@@ -998,19 +998,6 @@ struct bootflow_img *bootflow_img_add(struct bootflow *bflow, const char *fname,
 	return ptr;
 }
 
-const struct bootflow_img *bootflow_img_find(const struct bootflow *bflow,
-					     enum bootflow_img_t type)
-{
-	const struct bootflow_img *img;
-
-	alist_for_each(img, &bflow->images) {
-		if (img->type == type)
-			return img;
-	}
-
-	return NULL;
-}
-
 int bootflow_get_seq(const struct bootflow *bflow)
 {
 	struct bootstd_priv *std;

boot/bootmeth-uclass.c

@@ -388,7 +388,7 @@ int bootmeth_alloc_other(struct bootflow *bflow, const char *fname,
 	if (ret)
 		return log_msg_ret("all", ret);
 
-	if (!bootflow_img_add(bflow, bflow->fname, type, abuf_addr(buf),
+	if (!bootflow_img_add(bflow, bflow->fname, type, map_to_sysmem(buf),
 			      size))
 		return log_msg_ret("boi", -ENOMEM);
 

boot/bootmeth_extlinux.c

@@ -83,29 +83,13 @@ static int extlinux_fill_info(struct bootflow *bflow)
 	log_debug("parsing bflow file size %x\n", bflow->size);
 	membuf_init(&mb, bflow->buf, bflow->size);
 	membuf_putraw(&mb, bflow->size, true, &data);
-	while (len = membuf_readline(&mb, line, sizeof(line) - 1, 0, true), len) {
+	while (len = membuf_readline(&mb, line, sizeof(line) - 1, ' ', true), len) {
 		char *tok, *p = line;
-		const char *name = NULL;
 
-		if (*p == '#')
-			continue;
-		while (*p == ' ' || *p == '\t')
-			p++;
 		tok = strsep(&p, " ");
 		if (p) {
 			if (!strcmp("label", tok)) {
-				name = p;
-				if (bflow->os_name)
-					break;	/* just find the first */
-			} else if (!strcmp("menu", tok)) {
-				tok = strsep(&p, " ");
-				if (!strcmp("label", tok)) {
-					name = p;
-				}
-			}
-			if (name) {
-				free(bflow->os_name);
-				bflow->os_name = strdup(name);
+				bflow->os_name = strdup(p);
 				if (!bflow->os_name)
 					return log_msg_ret("os", -ENOMEM);
 			}

drivers/video/bochs.c

@@ -81,7 +81,11 @@ static int bochs_init_fb(struct udevice *dev)
 	/* disable blanking */
 	bochs_vga_write(mmio, VGA_ATT_W - VGA_INDEX, VGA_AR_ENABLE_DISPLAY);
 
-	plat->base = fb;
+	/* Use double buffering if enabled */
+	if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
+		plat->copy_base = fb;
+	else
+		plat->base = fb;
 
 	return 0;
 }

include/bootflow.h

@@ -647,17 +647,6 @@ const char *bootflow_img_type_name(enum bootflow_img_t type);
 struct bootflow_img *bootflow_img_add(struct bootflow *bflow, const char *fname,
 				      enum bootflow_img_t type, ulong addr,
 				      ulong size);
-
-/**
- * bootflow_img_find() - Find the first image of a given type
- *
- * @bflow: Bootflow to search
- * @type: Image type to search for
- * Return: Pointer to image, or NULL if not found
- */
-const struct bootflow_img *bootflow_img_find(const struct bootflow *bflow,
-					     enum bootflow_img_t type);
-
 /**
  * bootflow_get_seq() - Get the sequence number of a bootflow
  *

test/boot/bootflow.c

@@ -1488,22 +1488,6 @@ static int bootstd_images(struct unit_test_state *uts)
 	ptr = map_sysmem(img->addr, 0);
 	ut_asserteq(0, *(ulong *)ptr);
 
-	/* check we can find images */
-	bflow = alist_get(&std->bootflows, 1, struct bootflow);
-	img = bootflow_img_find(bflow, (enum bootflow_img_t)IH_TYPE_SCRIPT);
-	ut_assertnonnull(img);
-	ut_asserteq(IH_TYPE_SCRIPT, img->type);
-	ut_asserteq(map_to_sysmem(bflow->buf), img->addr);
-	ut_asserteq(bflow->size, img->size);
-
-	img = bootflow_img_find(bflow, BFI_LOGO);
-	ut_assertnonnull(img);
-	ut_asserteq(BFI_LOGO, img->type);
-	ut_asserteq(map_to_sysmem(bflow->logo), img->addr);
-	ut_asserteq(bflow->logo_size, img->size);
-
-	ut_assertnull(bootflow_img_find(bflow, BFI_CMDLINE));
-
 	ut_assert_console_end();
 
 	return 0;