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drm/radeon/dpm: add support for SVI2 voltage for SI

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Some newer boards use SVI2 for voltage control rather
than GPIO.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2014-06-06 18:43:45 -04:00
parent a91576d791
commit 636e258265
5 changed files with 162 additions and 43 deletions
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44
drivers/gpu/drm/radeon/radeon_atombios.c
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@@ -3397,6 +3397,50 @@ radeon_atom_is_voltage_gpio(struct radeon_device *rdev,
return false;
}
int radeon_atom_get_svi2_info(struct radeon_device *rdev,
u8 voltage_type,
u8 *svd_gpio_id, u8 *svc_gpio_id)
{
int index = GetIndexIntoMasterTable(DATA, VoltageObjectInfo);
u8 frev, crev;
u16 data_offset, size;
union voltage_object_info *voltage_info;
union voltage_object *voltage_object = NULL;
if (atom_parse_data_header(rdev->mode_info.atom_context, index, &size,
&frev, &crev, &data_offset)) {
voltage_info = (union voltage_object_info *)
(rdev->mode_info.atom_context->bios + data_offset);
switch (frev) {
case 3:
switch (crev) {
case 1:
voltage_object = (union voltage_object *)
atom_lookup_voltage_object_v3(&voltage_info->v3,
voltage_type,
VOLTAGE_OBJ_SVID2);
if (voltage_object) {
*svd_gpio_id = voltage_object->v3.asSVID2Obj.ucSVDGpioId;
*svc_gpio_id = voltage_object->v3.asSVID2Obj.ucSVCGpioId;
} else {
return -EINVAL;
}
break;
default:
DRM_ERROR("unknown voltage object table\n");
return -EINVAL;
}
break;
default:
DRM_ERROR("unknown voltage object table\n");
return -EINVAL;
}
}
return 0;
}
int radeon_atom_get_max_voltage(struct radeon_device *rdev,
u8 voltage_type, u16 *max_voltage)
{