Messages in this thread Patch in this message | | | From | Stefan Bader <> | Subject | [2.6.32+drm33-longterm] Patch "drm/radeon/kms: fix MSI re-arm on rv370+" has been added to staging queue | Date | Mon, 5 Mar 2012 14:40:07 +0100 |
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This is a note to let you know that I have just added a patch titled
drm/radeon/kms: fix MSI re-arm on rv370+
to the drm-next branch of the 2.6.32+drm33-longterm tree which can be found at
http://git.kernel.org/?p=linux/kernel/git/smb/linux-2.6.32.y-drm33.z.git;a=shortlog;h=refs/heads/drm-next or http://kernel.ubuntu.com/git?p=smb/linux-2.6.32.y-drm33.z.git;a=shortlog;h=refs/heads/drm-next
If you, or anyone else, feels it should not be added to the drm33-longterm tree, please reply to this email not later than 8 days after this email was sent.
Thanks. -Stefan
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From 2e1a2aa9a9969836243d634dfbf1631e7e63f53e Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher@amd.com> Date: Mon, 13 Feb 2012 16:36:34 -0500 Subject: [PATCH] drm/radeon/kms: fix MSI re-arm on rv370+
commit b7f5b7dec3d539a84734f2bcb7e53fbb1532a40b upstream.
MSI_REARM_EN register is a write only trigger register. There is no need RMW when re-arming.
May fix: https://bugs.freedesktop.org/show_bug.cgi?id=41668
Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stefan Bader <stefan.bader@canonical.com> --- drivers/gpu/drm/radeon/r100.c | 4 +--- drivers/gpu/drm/radeon/rs600.c | 4 +--- 2 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index c9e93ea..a2ae151 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -218,9 +218,7 @@ int r100_irq_process(struct radeon_device *rdev) WREG32(RADEON_AIC_CNTL, msi_rearm | RS400_MSI_REARM); break; default: - msi_rearm = RREG32(RADEON_MSI_REARM_EN) & ~RV370_MSI_REARM_EN; - WREG32(RADEON_MSI_REARM_EN, msi_rearm); - WREG32(RADEON_MSI_REARM_EN, msi_rearm | RV370_MSI_REARM_EN); + WREG32(RADEON_MSI_REARM_EN, RV370_MSI_REARM_EN); break; } } diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index 1700297..52b7799 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -270,9 +270,7 @@ int rs600_irq_process(struct radeon_device *rdev) WREG32(RADEON_BUS_CNTL, msi_rearm | RS600_MSI_REARM); break; default: - msi_rearm = RREG32(RADEON_MSI_REARM_EN) & ~RV370_MSI_REARM_EN; - WREG32(RADEON_MSI_REARM_EN, msi_rearm); - WREG32(RADEON_MSI_REARM_EN, msi_rearm | RV370_MSI_REARM_EN); + WREG32(RADEON_MSI_REARM_EN, RV370_MSI_REARM_EN); break; } } -- 1.7.9
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