Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752834AbWKBNS3 (ORCPT ); Thu, 2 Nov 2006 08:18:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752844AbWKBNS2 (ORCPT ); Thu, 2 Nov 2006 08:18:28 -0500 Received: from nz-out-0102.google.com ([64.233.162.192]:49282 "EHLO nz-out-0102.google.com") by vger.kernel.org with ESMTP id S1752834AbWKBNS1 (ORCPT ); Thu, 2 Nov 2006 08:18:27 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:organization:to:subject:date:user-agent:cc:mime-version:content-type:content-transfer-encoding:content-disposition:message-id; b=D7R2aUtw3A9obD6+IXryFIJ8GRnx+8SJYwzHVsk3yFbqBTBtiQOQ8CSdgFx/Qq5Wt6IJKq7n91fjZn+C780sY3Wmf/CW1wy5g+vkQUyBSw1svwEb9Q7oZcGMfpTmCFH0RmzznqqRknzUAiL3iBPP+/hpTHW2w0nZmBTPRhscvww= From: Yu Luming Organization: gmail To: Andrew Morton Subject: [patch 3/6] backlight and output sysfs support for acpi video driver Date: Sat, 4 Nov 2006 21:18:08 +0800 User-Agent: KMail/1.9.1 Cc: Pavel Machek , len.brown@intel.com, Matt Domsch , Alessandro Guido , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, jengelh@linux01.gwdg.de, gelma@gelma.net, ismail@pardus.org.tr, Richard Hughes MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200611042118.08629.luming.yu@gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 15778 Lines: 491 backlight and output sysfs support for acpi video driver signed-off-by Luming.yu@gmail.com [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 #include #include #include +#include +#include +#include #include @@ -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: "); if (options & 2) seq_printf(seq, " "); @@ -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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/