amdgpu/amdgpu_discovery: increase timeout limit for IFWI init

With a timeout of only 1 second, my rx 5700XT fails to initialize,
so this increases the timeout to 2s.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3697
Signed-off-by: Xaver Hugl <xaver.hugl@kde.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 9ed3d7b)
Cc: stable@vger.kernel.org

Author: Xaver Hugl

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

@@ -276,15 +276,15 @@ static int amdgpu_discovery_read_binary_from_mem(struct amdgpu_device *adev,
 	u32 msg;
 
 	if (!amdgpu_sriov_vf(adev)) {
-		/* It can take up to a second for IFWI init to complete on some dGPUs,
+		/* It can take up to two second for IFWI init to complete on some dGPUs,
 		 * but generally it should be in the 60-100ms range.  Normally this starts
 		 * as soon as the device gets power so by the time the OS loads this has long
 		 * completed.  However, when a card is hotplugged via e.g., USB4, we need to
 		 * wait for this to complete.  Once the C2PMSG is updated, we can
 		 * continue.
 		 */
 
-		for (i = 0; i < 1000; i++) {
+		for (i = 0; i < 2000; i++) {
 			msg = RREG32(mmMP0_SMN_C2PMSG_33);
 			if (msg & 0x80000000)
 				break;