backlight and output sysfs support for acpi video driver
signed-off-by Luming.yu@xxxxxxxxx
[patch 3/6] backlight and output sysfs support for acpi video driver
--
acpi/Kconfig | 2
acpi/video.c | 257 +++++++++++++++++++++++++++++++++++++++++++++++++++++----
video/Kconfig | 9 +
video/Makefile | 1
4 files changed, 253 insertions(+), 16 deletions(-)
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 0f9d4be..a7671f7 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -106,7 +106,7 @@ config ACPI_BUTTON
config ACPI_VIDEO
tristate "Video"
- depends on X86
+ depends on X86 && (BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL)
help
This driver implement the ACPI Extensions For Display Adapters
for integrated graphics devices on motherboard, as specified in
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 56666a9..ace21e2 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -30,6 +30,9 @@ #include <linux/types.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/pci.h>
+#include <linux/backlight.h>
+#include <linux/output.h>
#include <asm/uaccess.h>
@@ -141,11 +144,11 @@ struct acpi_video_device_cap {
u8 _ADR:1; /*Return the unique ID */
u8 _BCL:1; /*Query list of brightness control levels supported */
u8 _BCM:1; /*Set the brightness level */
+ u8 _BQC:1; /* Get current brightness level */
u8 _DDC:1; /*Return the EDID for this device */
u8 _DCS:1; /*Return status of output device */
u8 _DGS:1; /*Query graphics state */
u8 _DSS:1; /*Device state set */
- u8 _reserved:1;
};
struct acpi_video_device_brightness {
@@ -162,6 +165,7 @@ struct acpi_video_device {
struct acpi_video_bus *video;
struct acpi_device *dev;
struct acpi_video_device_brightness *brightness;
+ struct output_device *output_dev;
};
/* bus */
@@ -260,6 +264,56 @@ static int acpi_video_get_next_level(str
u32 level_current, u32 event);
static void acpi_video_switch_brightness(struct acpi_video_device *device,
int event);
+static int acpi_video_device_lcd_set_level(struct acpi_video_device *, int);
+static int acpi_video_device_lcd_get_level_current(struct acpi_video_device *,unsigned long *);
+/*backlight device sysfs support*/
+static int acpi_video_get_brightness(struct backlight_device *bd);
+static int acpi_video_set_brightness(struct backlight_device *bd);
+static int acpi_video_output_get(struct output_device *);
+static int acpi_video_output_set(struct output_device *);
+static int acpi_video_device_get_state(struct acpi_video_device *, unsigned long *);
+static int acpi_video_device_set_state(struct acpi_video_device *, int);
+
+static struct backlight_device *acpi_video_backlight;
+static struct acpi_video_device *backlight_acpi_device;
+static struct backlight_properties acpi_video_data = {
+ .owner = THIS_MODULE,
+ .max_brightness = 0,
+ .get_brightness = acpi_video_get_brightness,
+ .update_status = acpi_video_set_brightness,
+};
+static struct output_properties acpi_output_properties = {
+ .set_state = acpi_video_output_set,
+ .get_status = acpi_video_output_get,
+};
+static int acpi_video_get_brightness(struct backlight_device *bd)
+{
+ unsigned long cur_level;
+ acpi_video_device_lcd_get_level_current(backlight_acpi_device, &cur_level);
+ return (int) cur_level;
+}
+
+static int acpi_video_set_brightness(struct backlight_device *bd)
+{
+ int request_level = bd->props->brightness;
+ acpi_video_device_lcd_set_level(backlight_acpi_device, request_level);
+ return 0;
+}
+
+static int acpi_video_output_get(struct output_device *od)
+{
+ unsigned long state;
+ struct acpi_video_device *vd = (struct acpi_video_device *)class_get_devdata(&od->class_dev);
+ acpi_video_device_get_state(vd, &state);
+ return (int)state;
+}
+
+static int acpi_video_output_set(struct output_device *od)
+{
+ unsigned long state = od->request_state;
+ struct acpi_video_device *vd = (struct acpi_video_device *)class_get_devdata(&od->class_dev);
+ return acpi_video_device_set_state(vd, state);
+}
/* --------------------------------------------------------------------------
Video Management
@@ -345,7 +399,7 @@ acpi_video_device_lcd_set_level(struct a
arg0.integer.value = level;
status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
- printk(KERN_DEBUG "set_level status: %x\n", status);
+ printk(KERN_DEBUG PREFIX "set_level status: %x\n", status);
return status;
}
@@ -482,6 +536,134 @@ acpi_video_bus_DOS(struct acpi_video_bus
return status;
}
+
+/*
+ * copy & paste some code for acpi_pci_data, acpi_pci_data_handler,acpi_pci_data
+ * from pci_bind.c
+ * To-do: write a new API: acpi_pci_get.
+ */
+
+struct acpi_pci_data {
+ struct acpi_pci_id id;
+ struct pci_bus *bus;
+ struct pci_dev *dev;
+};
+
+static void acpi_pci_data_handler(acpi_handle handle, u32 function,
+ void *context)
+{
+
+ /* TBD: Anything we need to do here? */
+
+ return;
+}
+
+static struct acpi_pci_data * acpi_pci_get (struct acpi_device *device)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_pci_data *data = NULL;
+ struct acpi_pci_data *pdata = NULL;
+ char *pathname = NULL;
+ struct acpi_buffer buffer = { 0, NULL };
+ acpi_handle handle = NULL;
+ struct pci_dev *dev;
+ struct pci_bus *bus;
+
+
+ if (!device || !device->parent)
+ return NULL;
+
+ pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+ if (!pathname)
+ return -ENOMEM;
+ memset(pathname, 0, ACPI_PATHNAME_MAX);
+ buffer.length = ACPI_PATHNAME_MAX;
+ buffer.pointer = pathname;
+
+ data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
+ if (!data) {
+ kfree(pathname);
+ return NULL;
+ }
+ memset(data, 0, sizeof(struct acpi_pci_data));
+
+ acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
+ printk(KERN_INFO PREFIX "finding PCI device [%s]...\n", pathname);
+
+ /*
+ * Segment & Bus
+ * -------------
+ * These are obtained via the parent device's ACPI-PCI context.
+ */
+go_up:
+ status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
+ (void **)&pdata);
+ if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
+ struct acpi_device *tmp_dev;
+
+ tmp_dev = device->parent;
+ if (tmp_dev->parent && (tmp_dev->parent->handle != ACPI_ROOT_OBJECT)) {
+ device = tmp_dev;
+ goto go_up;
+ }
+
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Invalid ACPI-PCI context for parent device %s",
+ acpi_device_bid(device->parent)));
+ return NULL;
+ }
+ data->id.segment = pdata->id.segment;
+ data->id.bus = pdata->bus->number;
+
+ /*
+ * Device & Function
+ * -----------------
+ * These are simply obtained from the device's _ADR method. Note
+ * that a value of zero is valid.
+ */
+ data->id.device = device->pnp.bus_address >> 16;
+ data->id.function = device->pnp.bus_address & 0xFFFF;
+
+ printk(KERN_INFO PREFIX "...to %02x:%02x:%02x.%02x\n",
+ data->id.segment, data->id.bus, data->id.device,
+ data->id.function);
+
+ /*
+ * TBD: Support slot devices (e.g. function=0xFFFF).
+ */
+
+ /*
+ * Locate PCI Device
+ * -----------------
+ * Locate matching device in PCI namespace. If it doesn't exist
+ * this typically means that the device isn't currently inserted
+ * (e.g. docking station, port replicator, etc.).
+ * We cannot simply search the global pci device list, since
+ * PCI devices are added to the global pci list when the root
+ * bridge start ops are run, which may not have happened yet.
+ */
+ bus = pci_find_bus(data->id.segment, data->id.bus);
+ if (bus) {
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ if (dev->devfn == PCI_DEVFN(data->id.device,
+ data->id.function)) {
+ data->dev = dev;
+ break;
+ }
+ }
+ }
+ printk(KERN_INFO PREFIX "data->dev =%p", &data->dev);
+ printk(KERN_INFO PREFIX "data->dev->dev =%p\n", &data->dev->dev);
+ if (!data->dev) {
+ printk(KERN_ERR PREFIX "Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
+ data->id.segment, data->id.bus,
+ data->id.device, data->id.function);
+ return NULL;
+ }
+ return data;
+}
+
/*
* Arg:
* device : video output device (LCD, CRT, ..)
@@ -498,12 +680,18 @@ static void acpi_video_device_find_cap(s
acpi_integer status;
acpi_handle h_dummy1;
int i;
+ u32 max_level = 0;
union acpi_object *obj = NULL;
struct acpi_video_device_brightness *br = NULL;
+ struct acpi_pci_data *data;
+ data = acpi_pci_get (device->video->device);
+ if (!data || !(data->dev)) {
+ printk(KERN_ERR PREFIX "acpi_video_device:no valid data from acpi_pci_get\n");
+ return ;
+ }
memset(&device->cap, 0, 4);
-
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
device->cap._ADR = 1;
}
@@ -513,6 +701,9 @@ static void acpi_video_device_find_cap(s
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
device->cap._BCM = 1;
}
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BQC", &h_dummy1))) {
+ device->cap._BQC = 1;
+ }
if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
device->cap._DDC = 1;
}
@@ -526,6 +717,7 @@ static void acpi_video_device_find_cap(s
device->cap._DSS = 1;
}
+
status = acpi_video_device_lcd_query_levels(device, &obj);
if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
@@ -534,7 +726,7 @@ static void acpi_video_device_find_cap(s
br = kmalloc(sizeof(*br), GFP_KERNEL);
if (!br) {
- printk(KERN_ERR "can't allocate memory\n");
+ printk(KERN_ERR PREFIX "can't allocate memory\n");
} else {
memset(br, 0, sizeof(*br));
br->levels = kmalloc(obj->package.count *
@@ -550,6 +742,8 @@ static void acpi_video_device_find_cap(s
continue;
}
br->levels[count] = (u32) o->integer.value;
+ if (br->levels[count] > max_level)
+ max_level = br->levels[count];
count++;
}
out:
@@ -568,6 +762,26 @@ static void acpi_video_device_find_cap(s
kfree(obj);
+ if (device->cap._BCL && device->cap._BCM && device->cap._BQC){
+ unsigned long tmp;
+ acpi_video_data.max_brightness = max_level;
+ acpi_video_device_lcd_get_level_current(device, &tmp);
+ acpi_video_data.brightness = tmp;
+ acpi_video_backlight = backlight_device_register("acpi-video",
+ &(data->dev->dev), NULL, &acpi_video_data);
+ backlight_acpi_device = device;
+ }
+
+ if (device->cap._DCS && device->cap._DSS){
+ char name[16];
+ memset(name, 0, 16);
+ strcat(name, acpi_device_bid(device->dev->parent));
+ strcat(name, "_");
+ strcpy(name, acpi_device_bid(device->dev));
+ device->output_dev = video_output_register(name,
+ &(data->dev->dev),
+ device, &acpi_output_properties);
+ }
return;
}
@@ -1011,7 +1225,6 @@ static int acpi_video_bus_POST_info_seq_
printk(KERN_WARNING PREFIX
"This indicate a BIOS bug. Please contact the manufacturer.\n");
}
- printk("%lx\n", options);
seq_printf(seq, "can POST: <intgrated video>");
if (options & 2)
seq_printf(seq, " <PCI video>");
@@ -1148,11 +1361,15 @@ static int acpi_video_bus_add_fs(struct
{
struct proc_dir_entry *entry = NULL;
struct acpi_video_bus *video;
+ char proc_dir_name[32];
-
+ memset(proc_dir_name, 0, 32);
video = (struct acpi_video_bus *)acpi_driver_data(device);
if (!acpi_device_dir(device)) {
+ strcpy(proc_dir_name, acpi_device_bid(device));
+ strcat(proc_dir_name, "_");
+ strcat(proc_dir_name, acpi_device_bid(device->parent));
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
acpi_video_dir);
if (!acpi_device_dir(device))
@@ -1224,17 +1441,21 @@ static int acpi_video_bus_add_fs(struct
static int acpi_video_bus_remove_fs(struct acpi_device *device)
{
struct acpi_video_bus *video;
+ char proc_dir_name[32];
-
+ memset(proc_dir_name, 0, 32);
video = (struct acpi_video_bus *)acpi_driver_data(device);
-
if (acpi_device_dir(device)) {
remove_proc_entry("info", acpi_device_dir(device));
remove_proc_entry("ROM", acpi_device_dir(device));
remove_proc_entry("POST_info", acpi_device_dir(device));
remove_proc_entry("POST", acpi_device_dir(device));
remove_proc_entry("DOS", acpi_device_dir(device));
- remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
+
+ strcpy(proc_dir_name, acpi_device_bid(device));
+ strcat(proc_dir_name, "_");
+ strcat(proc_dir_name, acpi_device_bid(device->parent));
+ remove_proc_entry(proc_dir_name, acpi_video_dir);
acpi_device_dir(device) = NULL;
}
@@ -1268,7 +1489,6 @@ acpi_video_bus_get_one_device(struct acp
return -ENOMEM;
memset(data, 0, sizeof(struct acpi_video_device));
-
strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
acpi_driver_data(device) = data;
@@ -1568,6 +1788,10 @@ static int acpi_video_bus_put_one_device
status = acpi_remove_notify_handler(device->dev->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_device_notify);
+ if (device == backlight_acpi_device)
+ backlight_device_unregister(acpi_video_backlight);
+
+ video_output_unregister(device->output_dev);
return 0;
}
@@ -1615,7 +1839,7 @@ static void acpi_video_bus_notify(acpi_h
struct acpi_video_bus *video = (struct acpi_video_bus *)data;
struct acpi_device *device = NULL;
- printk("video bus notify\n");
+ printk(KERN_INFO PREFIX "video bus notify\n");
if (!video)
return;
@@ -1658,8 +1882,6 @@ static void acpi_video_device_notify(acp
(struct acpi_video_device *)data;
struct acpi_device *device = NULL;
-
- printk("video device notify\n");
if (!video_device)
return;
@@ -1691,8 +1913,9 @@ static int acpi_video_bus_add(struct acp
int result = 0;
acpi_status status = 0;
struct acpi_video_bus *video = NULL;
+ char proc_dir_name[32];
-
+ memset(proc_dir_name, 0, 32);
if (!device)
return -EINVAL;
@@ -1735,8 +1958,12 @@ static int acpi_video_bus_add(struct acp
goto end;
}
+ strcpy(proc_dir_name, acpi_device_bid(device));
+ strcat(proc_dir_name, "_");
+ strcat(proc_dir_name, acpi_device_bid(device->parent));
+
printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
- ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
+ ACPI_VIDEO_DEVICE_NAME, proc_dir_name,
video->flags.multihead ? "yes" : "no",
video->flags.rom ? "yes" : "no",
video->flags.post ? "yes" : "no");
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 7a43020..effcb23 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1644,5 +1644,14 @@ if SYSFS
source "drivers/video/backlight/Kconfig"
endif
+
+config VIDEO_OUTPUT_CONTROL
+ tristate "Video Output Switcher control"
+ depends on SYSFS
+ ---help---
+ The output sysfs class driver is to provide video output abstract
+ layer that can be used to hook platform specific driver methods
+ to enable/disable display output device through common sysfs
+ interface.
endmenu
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a6980e9..0f82eed 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -108,3 +108,4 @@ obj-$(CONFIG_FB_OF) += off
# the test framebuffer is last
obj-$(CONFIG_FB_VIRTUAL) += vfb.o
+obj-$(CONFIG_VIDEO_OUTPUT_CONTROL) += output.o
-
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