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alienware-wmi: For WMAX HDMI method, introduce a way to query HDMI cable status 

Since there are now multiple HDMI attributes associated with the WMAX method,
create a sysfs group for them instead.

Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Mario Limonciello 2014-05-07 15:08:10 -05:00 committed by Matthew Garrett
parent b998680e9a
commit bc2ef88432
1 changed files with 88 additions and 30 deletions
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116
drivers/platform/x86/alienware-wmi.c
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@ -32,6 +32,7 @@
#define WMAX_METHOD_HDMI_STATUS 0x2
#define WMAX_METHOD_BRIGHTNESS 0x3
#define WMAX_METHOD_ZONE_CONTROL 0x4
#define WMAX_METHOD_HDMI_CABLE 0x5
MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
MODULE_DESCRIPTION("Alienware special feature control");
@ -422,41 +423,85 @@ static void alienware_zone_exit(struct platform_device *dev)
The HDMI mux sysfs node indicates the status of the HDMI input mux.
It can toggle between standard system GPU output and HDMI input.
*/
static ssize_t show_hdmi(struct device *dev, struct device_attribute *attr,
char *buf)
static acpi_status alienware_hdmi_command(struct hdmi_args *in_args,
u32 command, int *out_data)
{
acpi_status status;
struct acpi_buffer input;
union acpi_object *obj;
u32 tmp = 0;
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_buffer input;
struct acpi_buffer output;
input.length = (acpi_size) sizeof(*in_args);
input.pointer = in_args;
if (out_data != NULL) {
output.length = ACPI_ALLOCATE_BUFFER;
output.pointer = NULL;
status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
command, &input, &output);
} else
status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
command, &input, NULL);
if (ACPI_SUCCESS(status) && out_data != NULL) {
obj = (union acpi_object *)output.pointer;
if (obj && obj->type == ACPI_TYPE_INTEGER)
*out_data = (u32) obj->integer.value;
}
return status;
}
static ssize_t show_hdmi_cable(struct device *dev,
struct device_attribute *attr, char *buf)
{
acpi_status status;
u32 out_data;
struct hdmi_args in_args = {
.arg = 0,
};
input.length = (acpi_size) sizeof(in_args);
input.pointer = &in_args;
status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
WMAX_METHOD_HDMI_STATUS, &input, &output);
status =
alienware_hdmi_command(&in_args, WMAX_METHOD_HDMI_CABLE,
(u32 *) &out_data);
if (ACPI_SUCCESS(status)) {
if (out_data == 0)
return scnprintf(buf, PAGE_SIZE,
"[unconnected] connected unknown\n");
else if (out_data == 1)
return scnprintf(buf, PAGE_SIZE,
"unconnected [connected] unknown\n");
}
pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
}
static ssize_t show_hdmi_source(struct device *dev,
struct device_attribute *attr, char *buf)
{
acpi_status status;
u32 out_data;
struct hdmi_args in_args = {
.arg = 0,
};
status =
alienware_hdmi_command(&in_args, WMAX_METHOD_HDMI_STATUS,
(u32 *) &out_data);
if (ACPI_SUCCESS(status)) {
obj = (union acpi_object *)output.pointer;
if (obj && obj->type == ACPI_TYPE_INTEGER)
tmp = (u32) obj->integer.value;
if (tmp == 1)
if (out_data == 1)
return scnprintf(buf, PAGE_SIZE,
"[input] gpu unknown\n");
else if (tmp == 2)
else if (out_data == 2)
return scnprintf(buf, PAGE_SIZE,
"input [gpu] unknown\n");
}
pr_err("alienware-wmi: unknown HDMI status: %d\n", status);
pr_err("alienware-wmi: unknown HDMI source status: %d\n", out_data);
return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
}
static ssize_t toggle_hdmi(struct device *dev, struct device_attribute *attr,
static ssize_t toggle_hdmi_source(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_buffer input;
acpi_status status;
struct hdmi_args args;
if (strcmp(buf, "gpu\n") == 0)
@ -466,33 +511,46 @@ static ssize_t toggle_hdmi(struct device *dev, struct device_attribute *attr,
else
args.arg = 3;
pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
input.length = (acpi_size) sizeof(args);
input.pointer = &args;
status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
WMAX_METHOD_HDMI_SOURCE, &input, NULL);
status = alienware_hdmi_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
if (ACPI_FAILURE(status))
pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
status);
return count;
}
static DEVICE_ATTR(hdmi, S_IRUGO | S_IWUSR, show_hdmi, toggle_hdmi);
static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
toggle_hdmi_source);
static void remove_hdmi(struct platform_device *device)
static struct attribute *hdmi_attrs[] = {
&dev_attr_cable.attr,
&dev_attr_source.attr,
NULL,
};
static struct attribute_group hdmi_attribute_group = {
.name = "hdmi",
.attrs = hdmi_attrs,
};
static void remove_hdmi(struct platform_device *dev)
{
device_remove_file(&device->dev, &dev_attr_hdmi);
sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
}
static int create_hdmi(void)
static int create_hdmi(struct platform_device *dev)
{
int ret = -ENOMEM;
ret = device_create_file(&platform_device->dev, &dev_attr_hdmi);
int ret;
ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
if (ret)
goto error_create_hdmi;
return 0;
error_create_hdmi:
remove_hdmi(platform_device);
remove_hdmi(dev);
return ret;
}
@ -526,7 +584,7 @@ static int __init alienware_wmi_init(void)
goto fail_platform_device2;
if (interface == WMAX) {
ret = create_hdmi();
ret = create_hdmi(platform_device);
if (ret)
goto fail_prep_hdmi;
}