drm/amdgpu: adjust sequence of ip_discovery init and timeout_setting

what:
1)move timtout setting before ip_early_init to reduce exclusive mode
cost for SRIOV

2)move ip_discovery_init() to inside of amdgpu_discovery_reg_base_init()
it is a prepare for the later upcoming patches.

why:
in later upcoming patches we would use a new mailbox event --
"req_gpu_init_data", which is a callback hooked in adev->virt.ops and
this callback send a new event "REQ_GPU_INIT_DAT" to host to notify
host to do some preparation like "IP discovery/vbios on the VF FB"
and this callback must be:

A) invoked after set_ip_block() because virt.ops is configured during
set_ip_block()

B) invoked before ip_discovery_init() becausen ip_discovery_init()
need host side prepares everything in VF FB first.

current place of ip_discovery_init() is before we can invoke callback
of adev->virt.ops, thus we must move ip_discovery_init() to a place
after the adev->virt.ops all settle done, and the perfect place is in
amdgpu_discovery_reg_base_init()

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Emily Deng <Emily.Deng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index 37e1fcf970b8..43bb22ad8add 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -156,7 +156,7 @@ static inline bool amdgpu_discovery_verify_checksum(uint8_t *data, uint32_t size
 	return !!(amdgpu_discovery_calculate_checksum(data, size) == expected);
 }
 
-int amdgpu_discovery_init(struct amdgpu_device *adev)
+static int amdgpu_discovery_init(struct amdgpu_device *adev)
 {
 	struct table_info *info;
 	struct binary_header *bhdr;
@@ -255,10 +255,12 @@ int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev)
 	uint8_t num_base_address;
 	int hw_ip;
 	int i, j, k;
+	int r;
 
-	if (!adev->discovery) {
-		DRM_ERROR("ip discovery uninitialized\n");
-		return -EINVAL;
+	r = amdgpu_discovery_init(adev);
+	if (r) {
+		DRM_ERROR("amdgpu_discovery_init failed\n");
+		return r;
 	}
 
 	bhdr = (struct binary_header *)adev->discovery;