samsung-laptop is not at all related to ACPI, but since this interface is not documented at all, and the driver has to use it at load to understand how it works on the laptop, I think it's a good idea to disable it if a better solution is available.
Signed-off-by: Corentin Chary <[email protected]> --- drivers/platform/x86/samsung-laptop.c | 20 ++++++++++++++++++-- 1 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c index be96910..49933d2 100644 --- a/drivers/platform/x86/samsung-laptop.c +++ b/drivers/platform/x86/samsung-laptop.c @@ -21,6 +21,7 @@ #include <linux/dmi.h> #include <linux/platform_device.h> #include <linux/rfkill.h> +#include <linux/acpi.h> /* * This driver is needed because a number of Samsung laptops do not hook @@ -230,6 +231,7 @@ struct samsung_laptop { struct backlight_device *backlight_device; struct rfkill *rfk; + bool handle_backlight; bool has_stepping_quirk; }; @@ -616,6 +618,9 @@ static int __init samsung_backlight_init(struct samsung_laptop *samsung) struct backlight_device *bd; struct backlight_properties props; + if (!samsung->handle_backlight) + return 0; + memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_PLATFORM; props.max_brightness = samsung->config->max_brightness - @@ -698,7 +703,8 @@ static void __init samsung_sabi_selftest(struct samsung_laptop *samsung, printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP); printk(KERN_DEBUG "sabi_iface = %p\n", samsung->sabi_iface); - test_backlight(samsung); + if (samsung->handle_backlight) + test_backlight(samsung); test_wireless(samsung); sabi_get_command(samsung, config->commands.get_brightness, &sretval); @@ -771,7 +777,8 @@ static int __init samsung_sabi_init(struct samsung_laptop *samsung) } /* Check for stepping quirk */ - check_for_stepping_quirk(samsung); + if (samsung->handle_backlight) + check_for_stepping_quirk(samsung); exit: if (ret) @@ -1059,6 +1066,15 @@ static int __init samsung_init(void) return -ENOMEM; mutex_init(&samsung->sabi_mutex); + samsung->handle_backlight = true; + +#ifdef CONFIG_ACPI + /* Don't handle backlight here if the acpi video already handle it */ + if (acpi_video_backlight_support()) { + pr_info("Backlight controlled by ACPI video driver\n"); + samsung->handle_backlight = false; + } +#endif ret = samsung_platform_init(samsung); if (ret) -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
