ACPI video: support buggy BIOSes with _BCQ implemented
Some buggy BIOSes implements _BCQ instead of _BQC. Male ACPI video driver support these buggy BIOS. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@@ -162,6 +162,7 @@ struct acpi_video_device_cap {
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u8 _BCL:1; /*Query list of brightness control levels supported */
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u8 _BCL:1; /*Query list of brightness control levels supported */
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u8 _BCM:1; /*Set the brightness level */
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u8 _BCM:1; /*Set the brightness level */
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u8 _BQC:1; /* Get current brightness level */
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u8 _BQC:1; /* Get current brightness level */
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u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
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u8 _DDC:1; /*Return the EDID for this device */
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u8 _DDC:1; /*Return the EDID for this device */
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u8 _DCS:1; /*Return status of output device */
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u8 _DCS:1; /*Return status of output device */
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u8 _DGS:1; /*Query graphics state */
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u8 _DGS:1; /*Query graphics state */
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@@ -523,8 +524,10 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
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{
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{
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acpi_status status = AE_OK;
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acpi_status status = AE_OK;
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if (device->cap._BQC) {
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if (device->cap._BQC || device->cap._BCQ) {
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status = acpi_evaluate_integer(device->dev->handle, "_BQC",
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char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
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status = acpi_evaluate_integer(device->dev->handle, buf,
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NULL, level);
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NULL, level);
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if (ACPI_SUCCESS(status)) {
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if (ACPI_SUCCESS(status)) {
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if (device->brightness->flags._BQC_use_index) {
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if (device->brightness->flags._BQC_use_index) {
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@@ -544,8 +547,8 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
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* ACPI video backlight still works w/ buggy _BQC.
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* ACPI video backlight still works w/ buggy _BQC.
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* http://bugzilla.kernel.org/show_bug.cgi?id=12233
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* http://bugzilla.kernel.org/show_bug.cgi?id=12233
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*/
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*/
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ACPI_WARNING((AE_INFO, "Evaluating _BQC failed"));
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ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
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device->cap._BQC = 0;
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device->cap._BQC = device->cap._BCQ = 0;
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}
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}
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}
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}
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@@ -861,6 +864,12 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
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}
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}
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if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
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if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
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device->cap._BQC = 1;
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device->cap._BQC = 1;
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else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
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&h_dummy1))) {
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printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
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device->cap._BCQ = 1;
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}
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if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
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if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
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device->cap._DDC = 1;
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device->cap._DDC = 1;
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}
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}
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