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drm/radeon: skip MC reset as it's probably not hung

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The MC is mostly likely busy (e.g., display requests), not hung
so no need to reset it.  Doing an MC reset is tricky and not
particularly reliable.  Fixes hangs in certain cases.

Reported-by: Josh Boyer <jwboyer@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-02-28 10:03:08 -05:00
parent e8fc41377f
commit d808fc8829
4 changed files with 24 additions and 0 deletions
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6
drivers/gpu/drm/radeon/evergreen.c
View file

@ -2438,6 +2438,12 @@ static u32 evergreen_gpu_check_soft_reset(struct radeon_device *rdev)
if (tmp & L2_BUSY)
reset_mask |= RADEON_RESET_VMC;
/* Skip MC reset as it's mostly likely not hung, just busy */
if (reset_mask & RADEON_RESET_MC) {
DRM_DEBUG("MC busy: 0x%08X, clearing.\n", reset_mask);
reset_mask &= ~RADEON_RESET_MC;
}
return reset_mask;
}

6
drivers/gpu/drm/radeon/ni.c
View file

@ -1381,6 +1381,12 @@ static u32 cayman_gpu_check_soft_reset(struct radeon_device *rdev)
if (tmp & L2_BUSY)
reset_mask |= RADEON_RESET_VMC;
/* Skip MC reset as it's mostly likely not hung, just busy */
if (reset_mask & RADEON_RESET_MC) {
DRM_DEBUG("MC busy: 0x%08X, clearing.\n", reset_mask);
reset_mask &= ~RADEON_RESET_MC;
}
return reset_mask;
}

6
drivers/gpu/drm/radeon/r600.c
View file

@ -1394,6 +1394,12 @@ static u32 r600_gpu_check_soft_reset(struct radeon_device *rdev)
if (r600_is_display_hung(rdev))
reset_mask |= RADEON_RESET_DISPLAY;
/* Skip MC reset as it's mostly likely not hung, just busy */
if (reset_mask & RADEON_RESET_MC) {
DRM_DEBUG("MC busy: 0x%08X, clearing.\n", reset_mask);
reset_mask &= ~RADEON_RESET_MC;
}
return reset_mask;
}

6
drivers/gpu/drm/radeon/si.c
View file

@ -2284,6 +2284,12 @@ static u32 si_gpu_check_soft_reset(struct radeon_device *rdev)
if (tmp & L2_BUSY)
reset_mask |= RADEON_RESET_VMC;
/* Skip MC reset as it's mostly likely not hung, just busy */
if (reset_mask & RADEON_RESET_MC) {
DRM_DEBUG("MC busy: 0x%08X, clearing.\n", reset_mask);
reset_mask &= ~RADEON_RESET_MC;
}
return reset_mask;
}