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drm/xe/pxp: Don't allow PXP on older PTL GSC FWs

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On PTL, older GSC FWs have a bug that can cause them to crash during
PXP invalidation events, which leads to a complete loss of power
management on the media GT. Therefore, we can't use PXP on FWs that
have this bug, which was fixed in PTL GSC build 1396.

Fixes: b1dcec9bd8 ("drm/xe/ptl: Enable PXP for PTL")
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Julia Filipchuk <julia.filipchuk@intel.com>
Reviewed-by: Julia Filipchuk <julia.filipchuk@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patch.msgid.link/20260324153718.3155504-10-daniele.ceraolospurio@intel.com
This commit is contained in:
Daniele Ceraolo Spurio 2026-03-24 08:37:23 -07:00
parent 0850ec7bb2
commit 6eb04caaa9
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/xe/xe_pxp.c
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@ -380,6 +380,18 @@ int xe_pxp_init(struct xe_device *xe)
return 0;
}
/*
* On PTL, older GSC FWs have a bug that can cause them to crash during
* PXP invalidation events, which leads to a complete loss of power
* management on the media GT. Therefore, we can't use PXP on FWs that
* have this bug, which was fixed in PTL GSC build 1396.
*/
if (xe->info.platform == XE_PANTHERLAKE &&
gt->uc.gsc.fw.versions.found[XE_UC_FW_VER_RELEASE].build < 1396) {
drm_info(&xe->drm, "PXP requires PTL GSC build 1396 or newer\n");
return 0;
}
pxp = drmm_kzalloc(&xe->drm, sizeof(struct xe_pxp), GFP_KERNEL);
if (!pxp) {
err = -ENOMEM;