Initial commit

target/linux/bcm27xx/patches-6.6/950-0594-drm-vc4-hvs-Rework-LBM-alignment.patch

@@ -0,0 +1,45 @@
+From ec3556d9297746b663b628fa9794d742359397c8 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 13 Apr 2023 10:12:19 +0200
+Subject: [PATCH 0594/1085] drm/vc4: hvs: Rework LBM alignment
+
+With the introduction of the support for BCM2712, the check of whether
+we're running on vc5 or not to compute the LBM alignment requirement
+doesn't work anymore.
+
+Moreover, the LBM size will need to be computed in words for the
+BCM2712, while we've had sizes in bytes so far.
+
+Aligning on either 64 or 32 words is thus fairly harmful on BCM2712, so
+let's just explicitly align the size when needed, and then call
+drm_mm_insert_node_generic() with an alignment of 1.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_plane.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_plane.c
++++ b/drivers/gpu/drm/vc4/vc4_plane.c
+@@ -744,6 +744,11 @@ static int vc4_plane_allocate_lbm(struct
+ 	if (!lbm_size)
+ 		return 0;
+ 
++	if (vc4->gen == VC4_GEN_5)
++		lbm_size = ALIGN(lbm_size, 64);
++	else if (vc4->gen == VC4_GEN_4)
++		lbm_size = ALIGN(lbm_size, 32);
++
+ 	drm_dbg_driver(drm, "[PLANE:%d:%s] LBM Allocation Size: %u\n",
+ 		       plane->base.id, plane->name, lbm_size);
+ 
+@@ -759,8 +764,7 @@ static int vc4_plane_allocate_lbm(struct
+ 		spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
+ 		ret = drm_mm_insert_node_generic(&vc4->hvs->lbm_mm,
+ 						 &vc4_state->lbm,
+-						 lbm_size,
+-						 vc4->gen == VC4_GEN_5 ? 64 : 32,
++						 lbm_size, 1,
+ 						 0, 0);
+ 		spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
+