Merge tag 'drm-intel-gt-next-2022-11-03' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

Driver Changes:

- Fix for #7306: [Arc A380] white flickering when using arc as a
  secondary gpu (Matt A)
- Add Wa_18017747507 for DG2 (Wayne)
- Avoid spurious WARN on DG1 due to incorrect cache_dirty flag
  (Niranjana, Matt A)
- Corrections to CS timestamp support for Gen5 and earlier (Ville)

- Fix a build error used with clang compiler on hwmon (GG)
- Improvements to LMEM handling with RPM (Anshuman, Matt A)
- Cleanups in dmabuf code (Mike)

- Selftest improvements (Matt A)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y2N11wu175p6qeEN@jlahtine-mobl.ger.corp.intel.com

1 files changed, 21 insertions, 11 deletions

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 69cdaaddc4a9..5efe61f67546 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -103,19 +103,15 @@ static int create_vcs_context(struct intel_pxp *pxp)
 
 static void destroy_vcs_context(struct intel_pxp *pxp)
 {
-	intel_engine_destroy_pinned_context(fetch_and_zero(&pxp->ce));
+	if (pxp->ce)
+		intel_engine_destroy_pinned_context(fetch_and_zero(&pxp->ce));
 }
 
-void intel_pxp_init(struct intel_pxp *pxp)
+static void pxp_init_full(struct intel_pxp *pxp)
 {
 	struct intel_gt *gt = pxp_to_gt(pxp);
 	int ret;
 
-	if (!HAS_PXP(gt->i915))
-		return;
-
-	mutex_init(&pxp->tee_mutex);
-
 	/*
 	 * we'll use the completion to check if there is a termination pending,
 	 * so we start it as completed and we reinit it when a termination
@@ -124,8 +120,7 @@ void intel_pxp_init(struct intel_pxp *pxp)
 	init_completion(&pxp->termination);
 	complete_all(&pxp->termination);
 
-	mutex_init(&pxp->arb_mutex);
-	INIT_WORK(&pxp->session_work, intel_pxp_session_work);
+	intel_pxp_session_management_init(pxp);
 
 	ret = create_vcs_context(pxp);
 	if (ret)
@@ -143,11 +138,26 @@ out_context:
 	destroy_vcs_context(pxp);
 }
 
-void intel_pxp_fini(struct intel_pxp *pxp)
+void intel_pxp_init(struct intel_pxp *pxp)
 {
-	if (!intel_pxp_is_enabled(pxp))
+	struct intel_gt *gt = pxp_to_gt(pxp);
+
+	/* we rely on the mei PXP module */
+	if (!IS_ENABLED(CONFIG_INTEL_MEI_PXP))
 		return;
 
+	/*
+	 * If HuC is loaded by GSC but PXP is disabled, we can skip the init of
+	 * the full PXP session/object management and just init the tee channel.
+	 */
+	if (HAS_PXP(gt->i915))
+		pxp_init_full(pxp);
+	else if (intel_huc_is_loaded_by_gsc(&gt->uc.huc) && intel_uc_uses_huc(&gt->uc))
+		intel_pxp_tee_component_init(pxp);
+}
+
+void intel_pxp_fini(struct intel_pxp *pxp)
+{
 	pxp->arb_is_valid = false;
 
 	intel_pxp_tee_component_fini(pxp);