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@@ -81,11 +81,12 @@ static bool allow_duplicates;
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module_param(allow_duplicates, bool, 0644);
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/*
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- * For Windows 8 systems: if set ture and the GPU driver has
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- * registered a backlight interface, skip registering ACPI video's.
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+ * For Windows 8 systems: used to decide if video module
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+ * should skip registering backlight interface of its own.
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*/
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-static bool use_native_backlight = false;
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-module_param(use_native_backlight, bool, 0644);
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+static int use_native_backlight_param = -1;
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+module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
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+static bool use_native_backlight_dmi = false;
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static int register_count;
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static struct mutex video_list_lock;
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@@ -231,9 +232,17 @@ static int acpi_video_get_next_level(struct acpi_video_device *device,
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static int acpi_video_switch_brightness(struct acpi_video_device *device,
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int event);
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+static bool acpi_video_use_native_backlight(void)
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+{
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+ if (use_native_backlight_param != -1)
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+ return use_native_backlight_param;
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+ else
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+ return use_native_backlight_dmi;
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+}
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+
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static bool acpi_video_verify_backlight_support(void)
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{
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- if (acpi_osi_is_win8() && use_native_backlight &&
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+ if (acpi_osi_is_win8() && acpi_video_use_native_backlight() &&
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backlight_device_registered(BACKLIGHT_RAW))
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return false;
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return acpi_video_backlight_support();
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@@ -398,6 +407,12 @@ static int __init video_set_bqc_offset(const struct dmi_system_id *d)
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return 0;
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}
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+static int __init video_set_use_native_backlight(const struct dmi_system_id *d)
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+{
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+ use_native_backlight_dmi = true;
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+ return 0;
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+}
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+
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static struct dmi_system_id video_dmi_table[] __initdata = {
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/*
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* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
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@@ -442,6 +457,120 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
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},
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},
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "ThinkPad T430s",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430s"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "ThinkPad X230",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "ThinkPad X1 Carbon",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "Lenovo Yoga 13",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "Dell Inspiron 7520",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "Inspiron 7520"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "Acer Aspire 5733Z",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "Acer Aspire V5-431",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP ProBook 4340s",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP ProBook 2013 models",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "),
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+ DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP EliteBook 2013 models",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "),
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+ DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP ZBook 14",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP ZBook 15",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP ZBook 17",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"),
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+ },
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+ },
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+ {
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+ .callback = video_set_use_native_backlight,
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+ .ident = "HP EliteBook 8780w",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"),
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+ },
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+ },
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{}
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};
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@@ -685,6 +814,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
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union acpi_object *o;
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struct acpi_video_device_brightness *br = NULL;
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int result = -EINVAL;
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+ u32 value;
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if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
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@@ -715,7 +845,12 @@ acpi_video_init_brightness(struct acpi_video_device *device)
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printk(KERN_ERR PREFIX "Invalid data\n");
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continue;
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}
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- br->levels[count] = (u32) o->integer.value;
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+ value = (u32) o->integer.value;
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+ /* Skip duplicate entries */
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+ if (count > 2 && br->levels[count - 1] == value)
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+ continue;
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+
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+ br->levels[count] = value;
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if (br->levels[count] > max_level)
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max_level = br->levels[count];
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