[Intel-xe] [PATCH 2/4] drm/xe: Don't raise error on fused-off media

[Matt Roper]

It's legitimate for the media GMD_ID register to read back as 0x0 if
media functionality is fused off or otherwise not present on the
platform.  Avoid printing an "unknown media version" error message for
this case.

Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/xe/xe_pci.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index 7926c2fa1433..b5bea42a458d 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -465,6 +465,10 @@ static void handle_gmdid(struct xe_device *xe,
 
 	peek_gmdid(xe, GMD_ID.addr + 0x380000, &ver, media_revid);
 
+	/* Media may legitimately be fused off / not present */
+	if (ver == 0)
+		return;
+
 	for (int i = 0; i < ARRAY_SIZE(media_ip_map); i++) {
 		if (ver == media_ip_map[i].ver) {
 			xe->info.media_verx100 = ver;
-- 
2.40.1