This is a note to let you know that I've just added the patch titled
drm/radeon: use packet2 for nop on hawaii with old firmware
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-use-packet2-for-nop-on-hawaii-with-old-firmware.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0e16e4cfde70e1cf00f9fe3a8f601d10e73e0ec6 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Fri, 1 Aug 2014 20:05:29 +0200
Subject: drm/radeon: use packet2 for nop on hawaii with old firmware
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From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 0e16e4cfde70e1cf00f9fe3a8f601d10e73e0ec6 upstream.
Older firmware didn't support the new nop packet.
v2 (Andreas Boll):
- Drop usage of packet3 for new firmware
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx> (v1)
Signed-off-by: Andreas Boll <andreas.boll.dev@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/cik.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -7901,6 +7901,7 @@ restart_ih:
static int cik_startup(struct radeon_device *rdev)
{
struct radeon_ring *ring;
+ u32 nop;
int r;
/* enable pcie gen2/3 link */
@@ -8034,9 +8035,15 @@ static int cik_startup(struct radeon_dev
}
cik_irq_set(rdev);
+ if (rdev->family == CHIP_HAWAII) {
+ nop = RADEON_CP_PACKET2;
+ } else {
+ nop = PACKET3(PACKET3_NOP, 0x3FFF);
+ }
+
ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP_RPTR_OFFSET,
- PACKET3(PACKET3_NOP, 0x3FFF));
+ nop);
if (r)
return r;
@@ -8044,7 +8051,7 @@ static int cik_startup(struct radeon_dev
/* type-2 packets are deprecated on MEC, use type-3 instead */
ring = &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX];
r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP1_RPTR_OFFSET,
- PACKET3(PACKET3_NOP, 0x3FFF));
+ nop);
if (r)
return r;
ring->me = 1; /* first MEC */
@@ -8055,7 +8062,7 @@ static int cik_startup(struct radeon_dev
/* type-2 packets are deprecated on MEC, use type-3 instead */
ring = &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX];
r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP2_RPTR_OFFSET,
- PACKET3(PACKET3_NOP, 0x3FFF));
+ nop);
if (r)
return r;
/* dGPU only have 1 MEC */
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-3.16/drm-radeon-use-packet2-for-nop-on-hawaii-with-old-firmware.patch
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