Merge tag 'drm-misc-next-2026-08-06' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for v7.3:

UAPI Changes:
- Remove the default udmabuf size limit of 64MB.

Cross-subsystem Changes:
- Add dmemcg support for eviction, and hook it up for amdgpu and xe.

Core Changes:
- Changes to TTM to be more aggressive when allocating below protection limit!
- Improve dt binding documentation for renesas.
- Add helper to convert physical address back to buddy block,
  add that to and improve its kunit test.

Driver Changes:
- Assorted small fixes to ti-sn65dsi86, panthor, imagination, omapdrm,
  bridge/synopsys, panel-edp, ssd130x, panel/tdo-tl070wsh30.
- Add Sharp LQ120P1JX51 panel.
- Add dmemcg support to nouveau.
- Various updates and improvements to sun4i, among which YUV and 4k support.

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

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patch.msgid.link/917d462a-8976-4a15-bec4-4513ec51c5c0@linux.intel.com

1 files changed, 62 insertions, 9 deletions

diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
index b518f7dec680..05911904c1f9 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
@@ -4,6 +4,8 @@
  * Copyright (C) 2021-2022 Red Hat
  */
 
+#include <linux/cgroup_dmem.h>
+
 #include <drm/drm_managed.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_buddy.h>
@@ -13,6 +15,7 @@
 
 #include "xe_bo.h"
 #include "xe_device.h"
+#include "xe_pm.h"
 #include "xe_res_cursor.h"
 #include "xe_ttm_vram_mgr.h"
 #include "xe_vram_types.h"
@@ -274,14 +277,47 @@ static const struct ttm_resource_manager_func xe_ttm_vram_mgr_func = {
 	.debug	= xe_ttm_vram_mgr_debug
 };
 
+static const struct dmem_cgroup_ops xe_ttm_vram_mgr_dmem_ops;
+
+static int xe_ttm_vram_mgr_dmem_reclaim(struct dmem_cgroup_pool_state *pool,
+					u64 target_bytes, void *priv)
+{
+	struct ttm_resource_manager *man = priv;
+	struct xe_device *xe = ttm_to_xe_device(man->bdev);
+	int ret, idx;
+
+	if (!drm_dev_enter(&xe->drm, &idx))
+		return -ENODEV;
+
+	{
+		ACQUIRE(xe_pm_runtime_ioctl, pm)(xe);
+
+		ret = ACQUIRE_ERR(xe_pm_runtime_ioctl, &pm);
+		if (ret >= 0)
+			ret = ttm_resource_manager_dmem_reclaim(pool, target_bytes, priv);
+	}
+
+	drm_dev_exit(idx);
+	return ret;
+}
+
+static const struct dmem_cgroup_ops xe_ttm_vram_mgr_dmem_ops = {
+	.reclaim = xe_ttm_vram_mgr_dmem_reclaim,
+};
+
+static void xe_ttm_vram_mgr_set_unused(struct drm_device *dev, void *arg)
+{
+	struct ttm_resource_manager *man = arg;
+
+	ttm_resource_manager_set_used(man, false);
+}
+
 static void xe_ttm_vram_mgr_fini(struct drm_device *dev, void *arg)
 {
 	struct xe_device *xe = to_xe_device(dev);
 	struct xe_ttm_vram_mgr *mgr = arg;
 	struct ttm_resource_manager *man = &mgr->manager;
 
-	ttm_resource_manager_set_used(man, false);
-
 	if (ttm_resource_manager_evict_all(&xe->ttm, man))
 		return;
 
@@ -299,14 +335,10 @@ int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
 			   u64 default_page_size)
 {
 	struct ttm_resource_manager *man = &mgr->manager;
+	struct dmem_cgroup_region *cg;
 	const char *name;
 	int err;
 
-	name = mem_type == XE_PL_VRAM0 ? "vram0" : "vram1";
-	man->cg = drmm_cgroup_register_region(&xe->drm, name, size);
-	if (IS_ERR(man->cg))
-		return PTR_ERR(man->cg);
-
 	man->func = &xe_ttm_vram_mgr_func;
 	mgr->mem_type = mem_type;
 	err = drmm_mutex_init(&xe->drm, &mgr->lock);
@@ -323,9 +355,30 @@ int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
 
 	gpu_buddy_driver_set_lock(&mgr->mm, &mgr->lock);
 	ttm_set_driver_manager(&xe->ttm, mem_type, &mgr->manager);
-	ttm_resource_manager_set_used(&mgr->manager, true);
 
-	return drmm_add_action_or_reset(&xe->drm, xe_ttm_vram_mgr_fini, mgr);
+	/*
+	 * Register the fini action before the cgroup region so that devres
+	 * LIFO teardown runs unregister_region before manager teardown
+	 * (draining any in-flight reclaim callbacks) and the manager fini second.
+	 */
+	err = drmm_add_action_or_reset(&xe->drm, xe_ttm_vram_mgr_fini, mgr);
+	if (err)
+		return err;
+
+	name = mem_type == XE_PL_VRAM0 ? "vram0" : "vram1";
+	cg = drmm_cgroup_register_region(&xe->drm, name,
+					 &(struct dmem_cgroup_init){
+						.size = size,
+						.ops = &xe_ttm_vram_mgr_dmem_ops,
+						.reclaim_priv = man,
+					 });
+	if (IS_ERR(cg))
+		return PTR_ERR(cg);
+
+	ttm_resource_manager_set_dmem_region(man, cg);
+	ttm_resource_manager_set_used(man, true);
+
+	return drmm_add_action_or_reset(&xe->drm, xe_ttm_vram_mgr_set_unused, man);
 }
 
 /**