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drm/xe: Don't fail probe on unsupported mailbox command

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If the device is running older pcode firmware, it is possible that newer
mailbox commands are not supported by it. The sysfs attributes aren't
useful in that case, but we shouldn't fail driver probe because of it.
As of now, it is unknown if we can distinguish unsupported commands before
attempting them. But until we figure out a way to do that, fix the
regressions.

v2: Add debug message (Lucas)

Fixes: cdc36b66cd ("drm/xe: Expose fan control and voltage regulator version")
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Tested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://lore.kernel.org/r/20250714215503.2897748-1-raag.jadav@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Raag Jadav
2025-07-15 03:25:03 +05:30
committed by Rodrigo Vivi
parent a816487681
commit ed5461daa1
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/xe/xe_device_sysfs.c
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@@ -160,8 +160,13 @@ static int late_bind_create_files(struct device *dev)
ret = xe_pcode_read(root, PCODE_MBOX(PCODE_LATE_BINDING, GET_CAPABILITY_STATUS, 0),
&cap, NULL);
if (ret)
if (ret) {
if (ret == -ENXIO) {
drm_dbg(&xe->drm, "Late binding not supported by firmware\n");
ret = 0;
}
goto out;
}
if (REG_FIELD_GET(V1_FAN_SUPPORTED, cap)) {
ret = sysfs_create_file(&dev->kobj, &dev_attr_lb_fan_control_version.attr);