There may be multiple ways of controlling the backlight on a given machine. Allow drivers to expose the type of interface they are providing, making it possible for userspace to make appropriate policy decisions.

Signed-off-by: Matthew Garrett mjg@redhat.com Cc: Richard Purdie rpurdie@rpsys.net Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org --- Documentation/ABI/stable/sysfs-class-backlight | 20 ++++++++++++++++++++ drivers/acpi/video.c | 1 + drivers/gpu/drm/nouveau/nouveau_backlight.c | 2 ++ drivers/hid/hid-picolcd.c | 1 + drivers/macintosh/via-pmu-backlight.c | 1 + drivers/platform/x86/acer-wmi.c | 1 + drivers/platform/x86/asus-laptop.c | 1 + drivers/platform/x86/asus_acpi.c | 1 + drivers/platform/x86/classmate-laptop.c | 1 + drivers/platform/x86/compal-laptop.c | 1 + drivers/platform/x86/dell-laptop.c | 1 + drivers/platform/x86/eeepc-laptop.c | 1 + drivers/platform/x86/fujitsu-laptop.c | 1 + drivers/platform/x86/msi-laptop.c | 1 + drivers/platform/x86/msi-wmi.c | 1 + drivers/platform/x86/panasonic-laptop.c | 1 + drivers/platform/x86/sony-laptop.c | 1 + drivers/platform/x86/thinkpad_acpi.c | 1 + drivers/platform/x86/toshiba_acpi.c | 1 + drivers/staging/samsung-laptop/samsung-laptop.c | 1 + drivers/usb/misc/appledisplay.c | 1 + drivers/video/atmel_lcdfb.c | 1 + drivers/video/aty/aty128fb.c | 1 + drivers/video/aty/atyfb_base.c | 1 + drivers/video/aty/radeon_backlight.c | 1 + drivers/video/backlight/88pm860x_bl.c | 1 + drivers/video/backlight/adp5520_bl.c | 1 + drivers/video/backlight/adp8860_bl.c | 1 + drivers/video/backlight/adx_bl.c | 1 + drivers/video/backlight/atmel-pwm-bl.c | 1 + drivers/video/backlight/backlight.c | 15 +++++++++++++++ drivers/video/backlight/corgi_lcd.c | 1 + drivers/video/backlight/cr_bllcd.c | 1 + drivers/video/backlight/da903x_bl.c | 1 + drivers/video/backlight/ep93xx_bl.c | 1 + drivers/video/backlight/generic_bl.c | 1 + drivers/video/backlight/hp680_bl.c | 1 + drivers/video/backlight/jornada720_bl.c | 1 + drivers/video/backlight/kb3886_bl.c | 1 + drivers/video/backlight/locomolcd.c | 1 + drivers/video/backlight/max8925_bl.c | 1 + drivers/video/backlight/mbp_nvidia_bl.c | 1 + drivers/video/backlight/omap1_bl.c | 1 + drivers/video/backlight/pcf50633-backlight.c | 1 + drivers/video/backlight/progear_bl.c | 1 + drivers/video/backlight/pwm_bl.c | 1 + drivers/video/backlight/tosa_bl.c | 1 + drivers/video/backlight/wm831x_bl.c | 1 + drivers/video/bf54x-lq043fb.c | 1 + drivers/video/bfin-t350mcqb-fb.c | 1 + drivers/video/nvidia/nv_backlight.c | 1 + drivers/video/omap2/displays/panel-acx565akm.c | 1 + drivers/video/omap2/displays/panel-taal.c | 2 ++ drivers/video/riva/fbdev.c | 1 + include/linux/backlight.h | 8 ++++++++ 55 files changed, 97 insertions(+), 0 deletions(-)

diff --git a/Documentation/ABI/stable/sysfs-class-backlight b/Documentation/ABI/stable/sysfs-class-backlight index 4d637e1..70302f3 100644 --- a/Documentation/ABI/stable/sysfs-class-backlight +++ b/Documentation/ABI/stable/sysfs-class-backlight @@ -34,3 +34,23 @@ Contact: Richard Purdie rpurdie@rpsys.net Description: Maximum brightness for <backlight>. Users: HAL + +What: /sys/class/backlight/<backlight>/type +Date: September 2010 +KernelVersion: 2.6.37 +Contact: Matthew Garrett mjg@redhat.com +Description: + The type of interface controlled by <backlight>. + "firmware": The driver uses a standard firmware interface + "platform": The driver uses a platform-specific interface + "raw": The driver controls hardware registers directly + + In the general case, when multiple backlight + interfaces are available for a single device, firmware + control should be preferred to platform control should + be preferred to raw control. Using a firmware + interface reduces the probability of confusion with + the hardware and the OS independently updating the + backlight state. Platform interfaces are mostly a + holdover from pre-standardisation of firmware + interfaces. diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 67dec0c..fbae6f5 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -963,6 +963,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) count++;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_FIRMWARE; props.max_brightness = device->brightness->count - 3; device->backlight = backlight_device_register(name, NULL, device, &acpi_backlight_ops, diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c index 406228f..9485af3 100644 --- a/drivers/gpu/drm/nouveau/nouveau_backlight.c +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c @@ -97,6 +97,7 @@ static int nouveau_nv40_backlight_init(struct drm_device *dev) return 0;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 31; bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev, &nv40_bl_ops, &props); @@ -120,6 +121,7 @@ static int nouveau_nv50_backlight_init(struct drm_device *dev) return 0;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 1025; bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev, &nv50_bl_ops, &props); diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c index bc2e077..3418b82 100644 --- a/drivers/hid/hid-picolcd.c +++ b/drivers/hid/hid-picolcd.c @@ -944,6 +944,7 @@ static int picolcd_init_backlight(struct picolcd_data *data, struct hid_report * }

memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; props.max_brightness = 0xff; bdev = backlight_device_register(dev_name(dev), dev, data, &picolcd_blops, &props); diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c index 1cec02f..364a295 100644 --- a/drivers/macintosh/via-pmu-backlight.c +++ b/drivers/macintosh/via-pmu-backlight.c @@ -163,6 +163,7 @@ void __init pmu_backlight_init() snprintf(name, sizeof(name), "pmubl");

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = FB_BACKLIGHT_LEVELS - 1; bd = backlight_device_register(name, NULL, NULL, &pmu_backlight_data, &props); diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 2badee2..8849e5a 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -926,6 +926,7 @@ static int __devinit acer_backlight_init(struct device *dev) struct backlight_device *bd;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = max_brightness; bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops, &props); diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c index b756e07..3b26fbdf 100644 --- a/drivers/platform/x86/asus-laptop.c +++ b/drivers/platform/x86/asus-laptop.c @@ -646,6 +646,7 @@ static int asus_backlight_init(struct asus_laptop *asus) !acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_SET, NULL) && lcd_switch_handle) { memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = 15;

bd = backlight_device_register(ASUS_LAPTOP_FILE, dev, diff --git a/drivers/platform/x86/asus_acpi.c b/drivers/platform/x86/asus_acpi.c index ca05aef..3ea8df5 100644 --- a/drivers/platform/x86/asus_acpi.c +++ b/drivers/platform/x86/asus_acpi.c @@ -1513,6 +1513,7 @@ static int __init asus_acpi_init(void) }

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = 15; asus_backlight_device = backlight_device_register("asus", NULL, NULL, &asus_backlight_data, diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c index 341cbfe..0ade3a4 100644 --- a/drivers/platform/x86/classmate-laptop.c +++ b/drivers/platform/x86/classmate-laptop.c @@ -562,6 +562,7 @@ static int cmpc_ipml_add(struct acpi_device *acpi) return -ENOMEM;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = 7; ipml->bd = backlight_device_register("cmpc_bl", &acpi->dev, acpi->handle, &cmpc_bl_ops, diff --git a/drivers/platform/x86/compal-laptop.c b/drivers/platform/x86/compal-laptop.c index 097083c..1e66477 100644 --- a/drivers/platform/x86/compal-laptop.c +++ b/drivers/platform/x86/compal-laptop.c @@ -962,6 +962,7 @@ static int __init compal_init(void) if (!acpi_video_backlight_support()) { struct backlight_properties props; memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = BACKLIGHT_LEVEL_MAX; compalbl_device = backlight_device_register(DRIVER_NAME, NULL, NULL, diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index 4413975..c23429e 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -575,6 +575,7 @@ static int __init dell_init(void) if (max_intensity) { struct backlight_properties props; memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = max_intensity; dell_backlight_device = backlight_device_register("dell_backlight", &platform_device->dev, diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c index 6b8e062..0f2f424 100644 --- a/drivers/platform/x86/eeepc-laptop.c +++ b/drivers/platform/x86/eeepc-laptop.c @@ -1135,6 +1135,7 @@ static int eeepc_backlight_init(struct eeepc_laptop *eeepc) struct backlight_device *bd;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = 15; bd = backlight_device_register(EEEPC_LAPTOP_FILE, &eeepc->platform_device->dev, eeepc, diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index f44cd26..f5376c6 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -1128,6 +1128,7 @@ static int __init fujitsu_init(void)

memset(&props, 0, sizeof(struct backlight_properties)); max_brightness = fujitsu->max_brightness; + props.type = BACKLIGHT_PLATFORM; props.max_brightness = max_brightness - 1; fujitsu->bl_device = backlight_device_register("fujitsu-laptop", NULL, NULL, diff --git a/drivers/platform/x86/msi-laptop.c b/drivers/platform/x86/msi-laptop.c index 7e9bb6d..142d385 100644 --- a/drivers/platform/x86/msi-laptop.c +++ b/drivers/platform/x86/msi-laptop.c @@ -804,6 +804,7 @@ static int __init msi_init(void) } else { struct backlight_properties props; memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = MSI_LCD_LEVEL_MAX - 1; msibl_device = backlight_device_register("msi-laptop-bl", NULL, NULL, &msibl_ops, diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c index 42a5469..064d8d6 100644 --- a/drivers/platform/x86/msi-wmi.c +++ b/drivers/platform/x86/msi-wmi.c @@ -252,6 +252,7 @@ static int __init msi_wmi_init(void) if (!acpi_video_backlight_support()) { struct backlight_properties props; memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = ARRAY_SIZE(backlight_map) - 1; backlight = backlight_device_register(DRV_NAME, NULL, NULL, &msi_backlight_ops, diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index ec01c3d..1c5ab80 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -646,6 +646,7 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) } /* initialize backlight */ memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT]; pcc->backlight = backlight_device_register("panasonic", NULL, pcc, &pcc_backlight_ops, &props); diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index e3154ff..c7c97ce 100644 --- a/drivers/platform/x86/sony-laptop.c +++ b/drivers/platform/x86/sony-laptop.c @@ -1297,6 +1297,7 @@ static int sony_nc_add(struct acpi_device *device) &handle))) { struct backlight_properties props; memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = SONY_MAX_BRIGHTNESS - 1; sony_backlight_device = backlight_device_register("sony", NULL, NULL, diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index e35ed12..8f59af0 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -6309,6 +6309,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm) return 1;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = bright_maxlvl; props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c index 7d67a45..f0dc4f0 100644 --- a/drivers/platform/x86/toshiba_acpi.c +++ b/drivers/platform/x86/toshiba_acpi.c @@ -1080,6 +1080,7 @@ static int __init toshiba_acpi_init(void) create_toshiba_proc_entries(); }

+ props.type = BACKLIGHT_PLATFORM; props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; toshiba_backlight_device = backlight_device_register("toshiba", &toshiba_acpi.p_dev->dev, diff --git a/drivers/staging/samsung-laptop/samsung-laptop.c b/drivers/staging/samsung-laptop/samsung-laptop.c index eb44b60..6c55f38 100644 --- a/drivers/staging/samsung-laptop/samsung-laptop.c +++ b/drivers/staging/samsung-laptop/samsung-laptop.c @@ -488,6 +488,7 @@ static int __init samsung_init(void)

/* create a backlight device to talk to this one */ memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = MAX_BRIGHT; backlight_device = backlight_device_register("samsung", &sdev->dev, NULL, &backlight_ops, diff --git a/drivers/usb/misc/appledisplay.c b/drivers/usb/misc/appledisplay.c index 1fa6ce3..6562090 100644 --- a/drivers/usb/misc/appledisplay.c +++ b/drivers/usb/misc/appledisplay.c @@ -282,6 +282,7 @@ static int appledisplay_probe(struct usb_interface *iface, snprintf(bl_name, sizeof(bl_name), "appledisplay%d", atomic_inc_return(&count_displays) - 1); memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; props.max_brightness = 0xff; pdata->bd = backlight_device_register(bl_name, NULL, pdata, &appledisplay_bl_data, &props); diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c index 8dce251..7d40604 100644 --- a/drivers/video/atmel_lcdfb.c +++ b/drivers/video/atmel_lcdfb.c @@ -127,6 +127,7 @@ static void init_backlight(struct atmel_lcdfb_info *sinfo) return;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 0xff; bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo, &atmel_lcdc_bl_ops, &props); diff --git a/drivers/video/aty/aty128fb.c b/drivers/video/aty/aty128fb.c index 34a0851..ac3b7e3 100644 --- a/drivers/video/aty/aty128fb.c +++ b/drivers/video/aty/aty128fb.c @@ -1818,6 +1818,7 @@ static void aty128_bl_init(struct aty128fb_par *par) snprintf(name, sizeof(name), "aty128bl%d", info->node);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = FB_BACKLIGHT_LEVELS - 1; bd = backlight_device_register(name, info->dev, par, &aty128_bl_data, &props); diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c index f8d69ad..f5be5e8 100644 --- a/drivers/video/aty/atyfb_base.c +++ b/drivers/video/aty/atyfb_base.c @@ -2241,6 +2241,7 @@ static void aty_bl_init(struct atyfb_par *par) snprintf(name, sizeof(name), "atybl%d", info->node);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = FB_BACKLIGHT_LEVELS - 1; bd = backlight_device_register(name, info->dev, par, &aty_bl_data, &props); diff --git a/drivers/video/aty/radeon_backlight.c b/drivers/video/aty/radeon_backlight.c index 256966e..732f665 100644 --- a/drivers/video/aty/radeon_backlight.c +++ b/drivers/video/aty/radeon_backlight.c @@ -158,6 +158,7 @@ void radeonfb_bl_init(struct radeonfb_info *rinfo) snprintf(name, sizeof(name), "radeonbl%d", rinfo->info->node);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = FB_BACKLIGHT_LEVELS - 1; bd = backlight_device_register(name, rinfo->info->dev, pdata, &radeon_bl_data, &props); diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c index 38ffc3f..d5e51e2 100644 --- a/drivers/video/backlight/88pm860x_bl.c +++ b/drivers/video/backlight/88pm860x_bl.c @@ -227,6 +227,7 @@ static int pm860x_backlight_probe(struct platform_device *pdev) }

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = MAX_BRIGHTNESS; bl = backlight_device_register(name, &pdev->dev, data, &pm860x_backlight_ops, &props); diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c index 9f436e0..af31197 100644 --- a/drivers/video/backlight/adp5520_bl.c +++ b/drivers/video/backlight/adp5520_bl.c @@ -303,6 +303,7 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) mutex_init(&data->lock);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = ADP5020_MAX_BRIGHTNESS; bl = backlight_device_register(pdev->name, data->master, data, &adp5520_bl_ops, &props); diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c index 3ec2460..a1afb21 100644 --- a/drivers/video/backlight/adp8860_bl.c +++ b/drivers/video/backlight/adp8860_bl.c @@ -707,6 +707,7 @@ static int __devinit adp8860_probe(struct i2c_client *client, i2c_set_clientdata(client, data);

memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; props.max_brightness = ADP8860_MAX_BRIGHTNESS;

mutex_init(&data->lock); diff --git a/drivers/video/backlight/adx_bl.c b/drivers/video/backlight/adx_bl.c index fe9af12..c861c41 100644 --- a/drivers/video/backlight/adx_bl.c +++ b/drivers/video/backlight/adx_bl.c @@ -104,6 +104,7 @@ static int __devinit adx_backlight_probe(struct platform_device *pdev) }

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 0xff; bldev = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, bl, &adx_backlight_ops, &props); diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c index e6a66da..0443a4f 100644 --- a/drivers/video/backlight/atmel-pwm-bl.c +++ b/drivers/video/backlight/atmel-pwm-bl.c @@ -168,6 +168,7 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev) }

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = pdata->pwm_duty_max - pdata->pwm_duty_min; bldev = backlight_device_register("atmel-pwm-bl", &pdev->dev, pwmbl, &atmel_pwm_bl_ops, &props); diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index e207810..074502c 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -19,6 +19,12 @@ #include <asm/backlight.h> #endif

+static const char *backlight_types[] = { + [BACKLIGHT_RAW] = "raw", + [BACKLIGHT_PLATFORM] = "platform", + [BACKLIGHT_FIRMWARE] = "firmware", +}; + #if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \ defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)) /* This callback gets called when something important happens inside a @@ -169,6 +175,14 @@ static ssize_t backlight_store_brightness(struct device *dev, return rc; }

+static ssize_t backlight_show_type(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct backlight_device *bd = to_backlight_device(dev); + + return sprintf(buf, "%s\n", backlight_types[bd->props.type]); +} + static ssize_t backlight_show_max_brightness(struct device *dev, struct device_attribute *attr, char *buf) { @@ -234,6 +248,7 @@ static struct device_attribute bl_device_attributes[] = { __ATTR(actual_brightness, 0444, backlight_show_actual_brightness, NULL), __ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL), + __ATTR(type, 0444, backlight_show_type, NULL), __ATTR_NULL, };

diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c index 1e71c35..af60983 100644 --- a/drivers/video/backlight/corgi_lcd.c +++ b/drivers/video/backlight/corgi_lcd.c @@ -562,6 +562,7 @@ static int __devinit corgi_lcd_probe(struct spi_device *spi) lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = pdata->max_intensity; lcd->bl_dev = backlight_device_register("corgi_bl", &spi->dev, lcd, &corgi_bl_ops, &props); diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c index a4f4546..d7d1673 100644 --- a/drivers/video/backlight/cr_bllcd.c +++ b/drivers/video/backlight/cr_bllcd.c @@ -193,6 +193,7 @@ static int cr_backlight_probe(struct platform_device *pdev) }

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; bdp = backlight_device_register("cr-backlight", &pdev->dev, NULL, &cr_backlight_ops, &props); if (IS_ERR(bdp)) { diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c index 87659ed..62043f1 100644 --- a/drivers/video/backlight/da903x_bl.c +++ b/drivers/video/backlight/da903x_bl.c @@ -136,6 +136,7 @@ static int da903x_backlight_probe(struct platform_device *pdev) da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2, DA9034_WLED_ISET(pdata->output_current));

+ props.type = BACKLIGHT_RAW; props.max_brightness = max_brightness; bl = backlight_device_register(pdev->name, data->da903x_dev, data, &da903x_backlight_ops, &props); diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c index b0cc491..9f1e389 100644 --- a/drivers/video/backlight/ep93xx_bl.c +++ b/drivers/video/backlight/ep93xx_bl.c @@ -87,6 +87,7 @@ static int __init ep93xxbl_probe(struct platform_device *dev) ep93xxbl->mmio = EP93XX_RASTER_BRIGHTNESS;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = EP93XX_MAX_BRIGHT; bl = backlight_device_register(dev->name, &dev->dev, ep93xxbl, &ep93xxbl_ops, &props); diff --git a/drivers/video/backlight/generic_bl.c b/drivers/video/backlight/generic_bl.c index 312ca61..8c6befd 100644 --- a/drivers/video/backlight/generic_bl.c +++ b/drivers/video/backlight/generic_bl.c @@ -91,6 +91,7 @@ static int genericbl_probe(struct platform_device *pdev) name = machinfo->name;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = machinfo->max_intensity; bd = backlight_device_register(name, &pdev->dev, NULL, &genericbl_ops, &props); diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c index 267d23f..38aa002 100644 --- a/drivers/video/backlight/hp680_bl.c +++ b/drivers/video/backlight/hp680_bl.c @@ -109,6 +109,7 @@ static int __devinit hp680bl_probe(struct platform_device *pdev) struct backlight_device *bd;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = HP680_MAX_INTENSITY; bd = backlight_device_register("hp680-bl", &pdev->dev, NULL, &hp680bl_ops, &props); diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c index 2f177b3..40e4fa8 100644 --- a/drivers/video/backlight/jornada720_bl.c +++ b/drivers/video/backlight/jornada720_bl.c @@ -106,6 +106,7 @@ static int jornada_bl_probe(struct platform_device *pdev) struct backlight_device *bd;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = BL_MAX_BRIGHT; bd = backlight_device_register(S1D_DEVICENAME, &pdev->dev, NULL, &jornada_bl_ops, &props); diff --git a/drivers/video/backlight/kb3886_bl.c b/drivers/video/backlight/kb3886_bl.c index f439a86..72dd555 100644 --- a/drivers/video/backlight/kb3886_bl.c +++ b/drivers/video/backlight/kb3886_bl.c @@ -149,6 +149,7 @@ static int kb3886bl_probe(struct platform_device *pdev) machinfo->limit_mask = -1;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = machinfo->max_intensity; kb3886_backlight_device = backlight_device_register("kb3886-bl", &pdev->dev, NULL, diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c index d2f5901..bbca312 100644 --- a/drivers/video/backlight/locomolcd.c +++ b/drivers/video/backlight/locomolcd.c @@ -184,6 +184,7 @@ static int locomolcd_probe(struct locomo_dev *ldev) local_irq_restore(flags);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 4; locomolcd_bl_device = backlight_device_register("locomo-bl", &ldev->dev, NULL, diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c index b2b2c7b..8d25610 100644 --- a/drivers/video/backlight/max8925_bl.c +++ b/drivers/video/backlight/max8925_bl.c @@ -136,6 +136,7 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) data->current_brightness = 0;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = MAX_BRIGHTNESS; bl = backlight_device_register(name, &pdev->dev, data, &max8925_backlight_ops, &props); diff --git a/drivers/video/backlight/mbp_nvidia_bl.c b/drivers/video/backlight/mbp_nvidia_bl.c index 9fb533f..1e5d10a 100644 --- a/drivers/video/backlight/mbp_nvidia_bl.c +++ b/drivers/video/backlight/mbp_nvidia_bl.c @@ -349,6 +349,7 @@ static int __init mbp_init(void) return -ENXIO;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 15; mbp_backlight_device = backlight_device_register("mbp_backlight", NULL, NULL, diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c index d3bc562..08d26a7 100644 --- a/drivers/video/backlight/omap1_bl.c +++ b/drivers/video/backlight/omap1_bl.c @@ -146,6 +146,7 @@ static int omapbl_probe(struct platform_device *pdev) return -ENOMEM;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = OMAPBL_MAX_INTENSITY; dev = backlight_device_register("omap-bl", &pdev->dev, bl, &omapbl_ops, &props); diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c index 3c424f7..ef5628d 100644 --- a/drivers/video/backlight/pcf50633-backlight.c +++ b/drivers/video/backlight/pcf50633-backlight.c @@ -112,6 +112,7 @@ static int __devinit pcf50633_bl_probe(struct platform_device *pdev) if (!pcf_bl) return -ENOMEM;

+ bl_props.type = BACKLIGHT_RAW; bl_props.max_brightness = 0x3f; bl_props.power = FB_BLANK_UNBLANK;

diff --git a/drivers/video/backlight/progear_bl.c b/drivers/video/backlight/progear_bl.c index 809278c..6af183d 100644 --- a/drivers/video/backlight/progear_bl.c +++ b/drivers/video/backlight/progear_bl.c @@ -84,6 +84,7 @@ static int progearbl_probe(struct platform_device *pdev) pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; progear_backlight_device = backlight_device_register("progear-bl", &pdev->dev, NULL, diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 5504435..647862c 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -103,6 +103,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) dev_dbg(&pdev->dev, "got pwm for backlight\n");

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = data->max_brightness; bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, pb, &pwm_backlight_ops, &props); diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c index 2a04b38..425a736 100644 --- a/drivers/video/backlight/tosa_bl.c +++ b/drivers/video/backlight/tosa_bl.c @@ -102,6 +102,7 @@ static int __devinit tosa_bl_probe(struct i2c_client *client, data->i2c = client;

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 512 - 1; data->bl = backlight_device_register("tosa-bl", &client->dev, data, &bl_ops, &props); diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c index 08fd87f..d4c6eb2 100644 --- a/drivers/video/backlight/wm831x_bl.c +++ b/drivers/video/backlight/wm831x_bl.c @@ -193,6 +193,7 @@ static int wm831x_backlight_probe(struct platform_device *pdev) data->current_brightness = 0; data->isink_reg = isink_reg;

+ props.type = BACKLIGHT_RAW; props.max_brightness = max_isel; bl = backlight_device_register("wm831x", &pdev->dev, data, &wm831x_backlight_ops, &props); diff --git a/drivers/video/bf54x-lq043fb.c b/drivers/video/bf54x-lq043fb.c index b020ba7..1efeadc 100644 --- a/drivers/video/bf54x-lq043fb.c +++ b/drivers/video/bf54x-lq043fb.c @@ -649,6 +649,7 @@ static int __devinit bfin_bf54x_probe(struct platform_device *pdev) } #ifndef NO_BL_SUPPORT memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 255; bl_dev = backlight_device_register("bf54x-bl", NULL, NULL, &bfin_lq043fb_bl_ops, &props); diff --git a/drivers/video/bfin-t350mcqb-fb.c b/drivers/video/bfin-t350mcqb-fb.c index 7a50272..4ce7292 100644 --- a/drivers/video/bfin-t350mcqb-fb.c +++ b/drivers/video/bfin-t350mcqb-fb.c @@ -545,6 +545,7 @@ static int __devinit bfin_t350mcqb_probe(struct platform_device *pdev) } #ifndef NO_BL_SUPPORT memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = 255; bl_dev = backlight_device_register("bf52x-bl", NULL, NULL, &bfin_lq043fb_bl_ops, &props); diff --git a/drivers/video/nvidia/nv_backlight.c b/drivers/video/nvidia/nv_backlight.c index 2fb552a..74ba5da 100644 --- a/drivers/video/nvidia/nv_backlight.c +++ b/drivers/video/nvidia/nv_backlight.c @@ -111,6 +111,7 @@ void nvidia_bl_init(struct nvidia_par *par) snprintf(name, sizeof(name), "nvidiabl%d", info->node);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = FB_BACKLIGHT_LEVELS - 1; bd = backlight_device_register(name, info->dev, par, &nvidia_bl_ops, &props); diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c index 07fbb8a..eb76021 100644 --- a/drivers/video/omap2/displays/panel-acx565akm.c +++ b/drivers/video/omap2/displays/panel-acx565akm.c @@ -534,6 +534,7 @@ static int acx_panel_probe(struct omap_dss_device *dssdev)

props.fb_blank = FB_BLANK_UNBLANK; props.power = FB_BLANK_UNBLANK; + props.type = BACKLIGHT_RAW;

bldev = backlight_device_register("acx565akm", &md->spi->dev, md, &acx565akm_bl_ops, &props); diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c index e1c765d..d16a7cd 100644 --- a/drivers/video/omap2/displays/panel-taal.c +++ b/drivers/video/omap2/displays/panel-taal.c @@ -729,6 +729,8 @@ static int taal_probe(struct omap_dss_device *dssdev) props.max_brightness = 255; else props.max_brightness = 127; + + props.type = BACKLIGHT_RAW; bldev = backlight_device_register("taal", &dssdev->dev, dssdev, &taal_bl_ops, &props); if (IS_ERR(bldev)) { diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c index 618f36b..9058ba5 100644 --- a/drivers/video/riva/fbdev.c +++ b/drivers/video/riva/fbdev.c @@ -355,6 +355,7 @@ static void riva_bl_init(struct riva_par *par) snprintf(name, sizeof(name), "rivabl%d", info->node);

memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; props.max_brightness = FB_BACKLIGHT_LEVELS - 1; bd = backlight_device_register(name, info->dev, par, &riva_bl_ops, &props); diff --git a/include/linux/backlight.h b/include/linux/backlight.h index 4a3d52e..5b45437 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -32,6 +32,12 @@ enum backlight_update_reason { BACKLIGHT_UPDATE_SYSFS, };

+enum backlight_type { + BACKLIGHT_RAW, + BACKLIGHT_PLATFORM, + BACKLIGHT_FIRMWARE, +}; + struct backlight_device; struct fb_info;

@@ -62,6 +68,8 @@ struct backlight_properties { /* FB Blanking active? (values as for power) */ /* Due to be removed, please use (state & BL_CORE_FBBLANK) */ int fb_blank; + /* Backlight type */ + enum backlight_type type; /* Flags used to signal drivers of state changes */ /* Upper 4 bits are reserved for driver internal use */ unsigned int state;