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| author | Alex Deucher <alexander.deucher@amd.com> | 2015-02-18 05:59:45 (GMT) |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-02-25 21:06:06 (GMT) |
| commit | 951caa6acf7121f88a9e8e04ef75bd0ac323a033 (patch) | |
| tree | 1e82d51da5c576daa8715d11d41ac3ff0438c58f | |
| parent | 3d2d98ee1af0cf6eebfbd6bff4c17d3601ac1284 (diff) | |
| download | linux-951caa6acf7121f88a9e8e04ef75bd0ac323a033.tar.xz | |
drm/radeon: disable mclk switching with 120hz+ monitors
These tend to be problematic even if the vblank period is
long enough. This needs more investigation across a wider
range of displays. Disable for now.
bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=87796
https://bugs.freedesktop.org/show_bug.cgi?id=89198
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_pm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 9f758d3..33cf410 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -852,6 +852,12 @@ static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev, single_display = false; } + /* 120hz tends to be problematic even if they are under the + * vblank limit. + */ + if (single_display && (r600_dpm_get_vrefresh(rdev) >= 120)) + single_display = false; + /* certain older asics have a separare 3D performance state, * so try that first if the user selected performance */ |