brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

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

1 files changed, 42 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0584-drm-v3d-Don-t-try-to-set-OVRTMUOUT-on-V3D-4.x.patch b/target/linux/brcm2708/patches-4.19/950-0584-drm-v3d-Don-t-try-to-set-OVRTMUOUT-on-V3D-4.x.patch
new file mode 100644
index 0000000000..d65ffb926a
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0584-drm-v3d-Don-t-try-to-set-OVRTMUOUT-on-V3D-4.x.patch
@@ -0,0 +1,42 @@
+From d4b98e9e78d87fe34b89077b9776a66f19d23856 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Tue, 16 Oct 2018 10:13:41 -0700
+Subject: [PATCH 584/703] drm/v3d: Don't try to set OVRTMUOUT on V3D 4.x.
+
+The old field is gone and the register now has a different field,
+QRMAXCNT for how many TMU requests get serviced before thread switch.
+We were accidentally reducing it from its default of 0x3 (4 requests)
+to 0x0 (1).
+
+v2: Skip setting the reg at all on 4.x, instead of trying to update
+    only the old field.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/gpu/drm/v3d/v3d_gem.c  | 3 ++-
+ drivers/gpu/drm/v3d/v3d_regs.h | 2 ++
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/v3d/v3d_gem.c
++++ b/drivers/gpu/drm/v3d/v3d_gem.c
+@@ -25,7 +25,8 @@ v3d_init_core(struct v3d_dev *v3d, int c
+ 	 * type.  If you want the default behavior, you can still put
+ 	 * "2" in the indirect texture state's output_type field.
+ 	 */
+-	V3D_CORE_WRITE(core, V3D_CTL_MISCCFG, V3D_MISCCFG_OVRTMUOUT);
++	if (v3d->ver < 40)
++		V3D_CORE_WRITE(core, V3D_CTL_MISCCFG, V3D_MISCCFG_OVRTMUOUT);
+ 
+ 	/* Whenever we flush the L2T cache, we always want to flush
+ 	 * the whole thing.
+--- a/drivers/gpu/drm/v3d/v3d_regs.h
++++ b/drivers/gpu/drm/v3d/v3d_regs.h
+@@ -216,6 +216,8 @@
+ # define V3D_IDENT2_BCG_INT                            BIT(28)
+ 
+ #define V3D_CTL_MISCCFG                                0x00018
++# define V3D_CTL_MISCCFG_QRMAXCNT_MASK                 V3D_MASK(3, 1)
++# define V3D_CTL_MISCCFG_QRMAXCNT_SHIFT                1
+ # define V3D_MISCCFG_OVRTMUOUT                         BIT(0)
+ 
+ #define V3D_CTL_L2CACTL                                0x00020