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drm/radeon: implement wrapper for GET_SYSTEM_PARAMS

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Use GET_SYSTEM_PARAMS for retrieving the configuration for the system
BIOS notifications.
v2: packed struct (Lee, Chun-Yi <jlee@suse.com>)
v3: fix enable with device specific command code

Signed-off-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Luca Tettamanti 2012-07-30 21:16:06 +02:00 committed by Alex Deucher
parent fd64ca8a9d
commit ce3cf821a3
1 changed files with 83 additions and 2 deletions
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85
drivers/gpu/drm/radeon/radeon_acpi.c
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@ -43,6 +43,18 @@ struct atif_verify_interface {
u32 function_bits; /* supported functions bit vector */
} __packed;
struct atif_system_params {
u16 size;
u32 valid_mask;
u32 flags;
u8 command_code;
} __packed;
#define ATIF_NOTIFY_MASK 0x3
#define ATIF_NOTIFY_NONE 0
#define ATIF_NOTIFY_81 1
#define ATIF_NOTIFY_N 2
/* Call the ATIF method
*/
static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
@ -144,10 +156,57 @@ out:
return err;
}
static int radeon_atif_get_notification_params(acpi_handle handle,
struct radeon_atif_notification_cfg *n)
{
union acpi_object *info;
struct atif_system_params params;
size_t size;
int err = 0;
info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL);
if (!info) {
err = -EIO;
goto out;
}
size = *(u16 *) info->buffer.pointer;
if (size < 10) {
err = -EINVAL;
goto out;
}
memset(&params, 0, sizeof(params));
size = min(sizeof(params), size);
memcpy(&params, info->buffer.pointer, size);
params.flags = params.flags & params.valid_mask;
if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
n->enabled = false;
n->command_code = 0;
} else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
n->enabled = true;
n->command_code = 0x81;
} else {
if (size < 11) {
err = -EINVAL;
goto out;
}
n->enabled = true;
n->command_code = params.command_code;
}
out:
kfree(info);
return err;
}
/* Call all ACPI methods here */
int radeon_acpi_init(struct radeon_device *rdev)
{
acpi_handle handle;
struct radeon_atif *atif = &rdev->atif;
int ret;
/* Get the device handle */
@ -158,10 +217,32 @@ int radeon_acpi_init(struct radeon_device *rdev)
return 0;
/* Call the ATIF method */
ret = radeon_atif_verify_interface(handle, &rdev->atif);
if (ret)
ret = radeon_atif_verify_interface(handle, atif);
if (ret) {
DRM_DEBUG_DRIVER("Call to verify_interface failed: %d\n", ret);
goto out;
}
if (atif->functions.sbios_requests && !atif->functions.system_params) {
/* XXX check this workraround, if sbios request function is
* present we have to see how it's configured in the system
* params
*/
atif->functions.system_params = true;
}
if (atif->functions.system_params) {
ret = radeon_atif_get_notification_params(handle,
&atif->notification_cfg);
if (ret) {
DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
ret);
/* Disable notification */
atif->notification_cfg.enabled = false;
}
}
out:
return ret;
}