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@@ -82,9 +82,15 @@ module_param(allow_duplicates, bool, 0644);
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* For Windows 8 systems: used to decide if video module
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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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* should skip registering backlight interface of its own.
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*/
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*/
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-static int use_native_backlight_param = -1;
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+enum {
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+ NATIVE_BACKLIGHT_NOT_SET = -1,
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+ NATIVE_BACKLIGHT_OFF,
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+ NATIVE_BACKLIGHT_ON,
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+};
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+
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+static int use_native_backlight_param = NATIVE_BACKLIGHT_NOT_SET;
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module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
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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 = true;
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+static int use_native_backlight_dmi = NATIVE_BACKLIGHT_NOT_SET;
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static int register_count;
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static int register_count;
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static struct mutex video_list_lock;
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static struct mutex video_list_lock;
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@@ -237,15 +243,16 @@ static void acpi_video_switch_brightness(struct work_struct *work);
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static bool acpi_video_use_native_backlight(void)
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static bool acpi_video_use_native_backlight(void)
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{
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{
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- if (use_native_backlight_param != -1)
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+ if (use_native_backlight_param != NATIVE_BACKLIGHT_NOT_SET)
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return use_native_backlight_param;
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return use_native_backlight_param;
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- else
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+ else if (use_native_backlight_dmi != NATIVE_BACKLIGHT_NOT_SET)
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return use_native_backlight_dmi;
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return use_native_backlight_dmi;
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+ return acpi_osi_is_win8();
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}
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}
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bool acpi_video_verify_backlight_support(void)
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bool acpi_video_verify_backlight_support(void)
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{
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{
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- if (acpi_osi_is_win8() && acpi_video_use_native_backlight() &&
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+ if (acpi_video_use_native_backlight() &&
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backlight_device_registered(BACKLIGHT_RAW))
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backlight_device_registered(BACKLIGHT_RAW))
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return false;
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return false;
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return acpi_video_backlight_support();
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return acpi_video_backlight_support();
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@@ -414,7 +421,13 @@ static int __init video_set_bqc_offset(const struct dmi_system_id *d)
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static int __init video_disable_native_backlight(const struct dmi_system_id *d)
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static int __init video_disable_native_backlight(const struct dmi_system_id *d)
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{
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{
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- use_native_backlight_dmi = false;
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+ use_native_backlight_dmi = NATIVE_BACKLIGHT_OFF;
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+ return 0;
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+}
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+
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+static int __init video_enable_native_backlight(const struct dmi_system_id *d)
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+{
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+ use_native_backlight_dmi = NATIVE_BACKLIGHT_ON;
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return 0;
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return 0;
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}
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}
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@@ -559,6 +572,17 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
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DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
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DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
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},
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},
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},
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},
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+
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+ /* Non win8 machines which need native backlight nevertheless */
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+ {
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+ /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
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+ .callback = video_enable_native_backlight,
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+ .ident = "Lenovo Ideapad Z570",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
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+ },
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+ },
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{}
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{}
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};
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};
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