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Add patch to fix radeon issues on powerpc

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This commit is contained in:
Josh Boyer 2013-06-17 10:11:18 -04:00
parent 542e360438
commit 6f1d3b1ba6
2 changed files with 93 additions and 1 deletions
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85
drm-radeon-Disable-writeback-by-default-on-ppc.patch Normal file
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@ -0,0 +1,85 @@
From b67e0a6a7409f9c1a12e573fb7d8d80ee455b103 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Mon, 17 Jun 2013 09:59:34 -0400
Subject: [PATCH] drm/radeon: Disable writeback by default on ppc
At least on an IBM Power 720, this check passes, but several piglit
tests will reliably trigger GPU resets due to the ring buffer pointers
not being updated. There's probably a better way to limit this to just
affected machines though.
Signed-off-by: Adam Jackson <ajax@redhat.com>
---
drivers/gpu/drm/radeon/r600_cp.c | 7 +++++++
drivers/gpu/drm/radeon/radeon_cp.c | 7 +++++++
drivers/gpu/drm/radeon/radeon_device.c | 4 ++--
drivers/gpu/drm/radeon/radeon_drv.c | 2 +-
4 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c
index 1c51c08..ef28532 100644
--- a/drivers/gpu/drm/radeon/r600_cp.c
+++ b/drivers/gpu/drm/radeon/r600_cp.c
@@ -552,6 +552,13 @@ static void r600_test_writeback(drm_radeon_private_t *dev_priv)
dev_priv->writeback_works = 0;
DRM_INFO("writeback test failed\n");
}
+#if defined(__ppc__) || defined(__ppc64__)
+ /* the test might succeed on ppc, but it's usually not reliable */
+ if (radeon_no_wb == -1) {
+ radeon_no_wb = 1;
+ DRM_INFO("not trusting writeback test due to arch quirk\n");
+ }
+#endif
if (radeon_no_wb == 1) {
dev_priv->writeback_works = 0;
DRM_INFO("writeback forced off\n");
diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index efc4f64..a967b33 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -892,6 +892,13 @@ static void radeon_test_writeback(drm_radeon_private_t * dev_priv)
dev_priv->writeback_works = 0;
DRM_INFO("writeback test failed\n");
}
+#if defined(__ppc__) || defined(__ppc64__)
+ /* the test might succeed on ppc, but it's usually not reliable */
+ if (radeon_no_wb == -1) {
+ radeon_no_wb = 1;
+ DRM_INFO("not trusting writeback test due to arch quirk\n");
+ }
+#endif
if (radeon_no_wb == 1) {
dev_priv->writeback_works = 0;
DRM_INFO("writeback forced off\n");
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 1899738..524046e 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -322,8 +322,8 @@ int radeon_wb_init(struct radeon_device *rdev)
/* disable event_write fences */
rdev->wb.use_event = false;
/* disabled via module param */
- if (radeon_no_wb == 1) {
- rdev->wb.enabled = false;
+ if (radeon_no_wb != -1) {
+ rdev->wb.enabled = !!radeon_no_wb;
} else {
if (rdev->flags & RADEON_IS_AGP) {
/* often unreliable on AGP */
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 094e7e5..04809d4 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -146,7 +146,7 @@ static inline void radeon_register_atpx_handler(void) {}
static inline void radeon_unregister_atpx_handler(void) {}
#endif
-int radeon_no_wb;
+int radeon_no_wb = -1;
int radeon_modeset = -1;
int radeon_dynclks = -1;
int radeon_r4xx_atom = 0;
--
1.8.2.1

9
kernel.spec
View File

@ -62,7 +62,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 1
%global baserelease 2
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -780,6 +780,8 @@ Patch25045: rt2800-fix-RT5390-RT3290-TX-power-settings-regression.patch
#rhbz 969644
Patch25046: KVM-x86-handle-idiv-overflow-at-kvm_write_tsc.patch
Patch25047: drm-radeon-Disable-writeback-by-default-on-ppc.patch
# END OF PATCH DEFINITIONS
%endif
@ -1488,6 +1490,8 @@ ApplyPatch rt2800-fix-RT5390-RT3290-TX-power-settings-regression.patch
#rhbz 969644
ApplyPatch KVM-x86-handle-idiv-overflow-at-kvm_write_tsc.patch
ApplyPatch drm-radeon-Disable-writeback-by-default-on-ppc.patch
# END OF PATCH APPLICATIONS
%endif
@ -2284,6 +2288,9 @@ fi
# ||----w |
# || ||
%changelog
* Mon Jun 17 2013 Josh Boyer <jwboyer@redhat.com>
- Add patch to fix radeon issues on powerpc
* Mon Jun 17 2013 Josh Boyer <jwboyer@redhat.com> - 3.10.0-0.rc6.git0.1
- Linux v3.10-rc6