Attachment 105904 Details for Bug 83616 – only enable me/pfp sync evergreen+

[patch] only enable me/pfp sync evergreen+

0001-drm-radeon-only-use-me-pfp-sync-on-evergreen.patch (text/plain), 1.21 KB, created by Alex Deucher on 2014-09-08 17:18:48 UTC

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Creator: Alex Deucher

Created: 2014-09-08 17:18:48 UTC

Size: 1.21 KB

patch

obsolete

>From b6c2b4faf90230ef9cf1a81f36cbccda4a606c59 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Mon, 8 Sep 2014 13:16:39 -0400
>Subject: [PATCH] drm/radeon: only use me/pfp sync on evergreen+
>
>The packet seems to cause hangs on some 7xx asics.
>
>bug:
>https://bugs.freedesktop.org/show_bug.cgi?id=83616
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>---
> drivers/gpu/drm/radeon/r600.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
>index e616eb5..3cfb500 100644
>--- a/drivers/gpu/drm/radeon/r600.c
>+++ b/drivers/gpu/drm/radeon/r600.c
>@@ -2769,8 +2769,8 @@ bool r600_semaphore_ring_emit(struct radeon_device *rdev,
> 	radeon_ring_write(ring, lower_32_bits(addr));
> 	radeon_ring_write(ring, (upper_32_bits(addr) & 0xff) | sel);
> 
>-	/* PFP_SYNC_ME packet only exists on 7xx+ */
>-	if (emit_wait && (rdev->family >= CHIP_RV770)) {
>+	/* PFP_SYNC_ME packet only exists on 7xx+, only enable it on eg+ */
>+	if (emit_wait && (rdev->family >= CHIP_CEDAR)) {
> 		/* Prevent the PFP from running ahead of the semaphore wait */
> 		radeon_ring_write(ring, PACKET3(PACKET3_PFP_SYNC_ME, 0));
> 		radeon_ring_write(ring, 0x0);
>-- 
>1.8.3.1
>

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Attachments on bug 83616: 105904 | 105922 | 105923

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