@@ -770,6 +770,7 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native)
static DEFINE_MUTEX(init_mutex);
static bool nvidia_wmi_ec_present;
static bool apple_gmux_present;
+ static bool dell_uart_backlight_present;
static bool native_available;
static bool init_done;
static long video_caps;
@@ -784,6 +785,7 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native)
&video_caps, NULL);
nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
apple_gmux_present = apple_gmux_detect(NULL, NULL);
+ dell_uart_backlight_present = acpi_dev_found("DELL0501");
init_done = true;
}
if (native)
@@ -808,6 +810,9 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native)
if (apple_gmux_present)
return acpi_backlight_apple_gmux;
+ if (dell_uart_backlight_present)
+ return acpi_backlight_native;
+
/* Use ACPI video if available, except when native should be preferred. */
if ((video_caps & ACPI_VIDEO_BACKLIGHT) &&
!(native_available && prefer_native_over_acpi_video()))