diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2014-01-07 13:51:51 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2014-01-20 18:20:55 -0500 |
| commit | 8097d94116d0c17e774ba4c8256e774018dc2a46 (patch) | |
| tree | 5cc6e04ed8d4265e15fb22638f86319647896f27 /drivers/gpu/drm/radeon/rv770_dpm.c | |
| parent | d526fbdd0fd0e5d78cd2e01a5387ee83431da7fb (diff) | |
drm/radeon/dpm: disable mclk switching on desktop RV770
Mclk switching doesn't seem to work reliably on these
cards. Most RV770 boards specify the same mclk for all
performance levels anyway so in most cases, this has
no affect.
Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=73067
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon/rv770_dpm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770_dpm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c index cb730cddfb9..80c595aba35 100644 --- a/drivers/gpu/drm/radeon/rv770_dpm.c +++ b/drivers/gpu/drm/radeon/rv770_dpm.c @@ -2536,6 +2536,12 @@ bool rv770_dpm_vblank_too_short(struct radeon_device *rdev) (rdev->pdev->subsystem_device == 0x1c42)) switch_limit = 200; + /* RV770 */ + /* mclk switching doesn't seem to work reliably on desktop RV770s */ + if ((rdev->family == CHIP_RV770) && + !(rdev->flags & RADEON_IS_MOBILITY)) + switch_limit = 0xffffffff; /* disable mclk switching */ + if (vblank_time < switch_limit) return true; else |