drm/amdgpu: Add "harvest" to IP discovery sysfs

Add the "harvest" field to the IP attributes in
the IP discovery sysfs visualization, as this
field is present in the binary data.

At the time of this commit, the harvest data isn't
consistently correct in VBIOS, but it is exposed
for completeness, in the hopes that VBIOS will be
fixed in the future.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: NLuben Tuikov <luben.tuikov@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c

@@ -393,6 +393,7 @@ struct ip_hw_instance {
 	int hw_id;
 	u8  num_instance;
 	u8  major, minor, revision;
+	u8  harvest;
 
 	int num_base_addresses;
 	u32 base_addr[];
@@ -440,6 +441,11 @@ static ssize_t revision_show(struct ip_hw_instance *ip_hw_instance, char *buf)
 	return sysfs_emit(buf, "%d\n", ip_hw_instance->revision);
 }
 
+static ssize_t harvest_show(struct ip_hw_instance *ip_hw_instance, char *buf)
+{
+	return sysfs_emit(buf, "0x%01X\n", ip_hw_instance->harvest);
+}
+
 static ssize_t num_base_addresses_show(struct ip_hw_instance *ip_hw_instance, char *buf)
 {
 	return sysfs_emit(buf, "%d\n", ip_hw_instance->num_base_addresses);
@@ -471,6 +477,7 @@ static struct ip_hw_instance_attr ip_hw_attr[] = {
 	__ATTR_RO(major),
 	__ATTR_RO(minor),
 	__ATTR_RO(revision),
+	__ATTR_RO(harvest),
 	__ATTR_RO(num_base_addresses),
 	__ATTR_RO(base_addr),
 };
@@ -708,6 +715,7 @@ static int amdgpu_discovery_sysfs_ips(struct amdgpu_device *adev,
 			ip_hw_instance->major = ip->major;
 			ip_hw_instance->minor = ip->minor;
 			ip_hw_instance->revision = ip->revision;
+			ip_hw_instance->harvest = ip->harvest;
 			ip_hw_instance->num_base_addresses = ip->num_base_address;
 
 			for (kk = 0; kk < ip_hw_instance->num_base_addresses; kk++)