bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0805-drm-vc4-Force-trigger-of-dlist-update-on-margins-cha.patch b/target/linux/bcm27xx/patches-5.15/950-0805-drm-vc4-Force-trigger-of-dlist-update-on-margins-cha.patch
new file mode 100644
index 0000000000..44fb34b37b
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0805-drm-vc4-Force-trigger-of-dlist-update-on-margins-cha.patch
@@ -0,0 +1,58 @@
+From decd9119a1379d04b875747405b78427b36b8d88 Mon Sep 17 00:00:00 2001
+From: 6by9 <6by9@users.noreply.github.com>
+Date: Fri, 1 Apr 2022 11:31:38 +0100
+Subject: [PATCH] drm/vc4: Force trigger of dlist update on margins
+ change (#4970)
+
+When the margins are changed, the dlist needs to be regenerated
+with the changed updated dest regions for each of the planes.
+
+Setting the zpos_changed flag is sufficient to trigger that
+without doing a full modeset, therefore set it should the
+margins be changed.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/gpu/drm/vc4/vc4_crtc.c | 14 ++++++++++----
+ drivers/gpu/drm/vc4/vc4_drv.h  |  7 +------
+ 2 files changed, 11 insertions(+), 10 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_crtc.c
++++ b/drivers/gpu/drm/vc4/vc4_crtc.c
+@@ -728,10 +728,16 @@ static int vc4_crtc_atomic_check(struct
+ 		if (conn_state->crtc != crtc)
+ 			continue;
+ 
+-		vc4_state->margins.left = conn_state->tv.margins.left;
+-		vc4_state->margins.right = conn_state->tv.margins.right;
+-		vc4_state->margins.top = conn_state->tv.margins.top;
+-		vc4_state->margins.bottom = conn_state->tv.margins.bottom;
++		if (memcmp(&vc4_state->margins, &conn_state->tv.margins,
++			   sizeof(vc4_state->margins))) {
++			memcpy(&vc4_state->margins, &conn_state->tv.margins,
++			       sizeof(vc4_state->margins));
++
++			/* Need to force the dlist entries for all planes to be
++			 * updated so that the dest rectangles are changed.
++			 */
++			crtc_state->zpos_changed = true;
++		}
+ 		break;
+ 	}
+ 
+--- a/drivers/gpu/drm/vc4/vc4_drv.h
++++ b/drivers/gpu/drm/vc4/vc4_drv.h
+@@ -589,12 +589,7 @@ struct vc4_crtc_state {
+ 	bool txp_armed;
+ 	unsigned int assigned_channel;
+ 
+-	struct {
+-		unsigned int left;
+-		unsigned int right;
+-		unsigned int top;
+-		unsigned int bottom;
+-	} margins;
++	struct drm_connector_tv_margins margins;
+ 
+ 	unsigned long hvs_load;
+