diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-09-13 10:55:10 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-01 09:41:01 -0700 |
| commit | a6ec1251f171fe06eda183ea40ac975336fa6a52 (patch) | |
| tree | ed04b359f24cbc2615c161ebe9d99692f6de98a9 /drivers | |
| parent | 93a6c524b6c1822501d825c501fc778a7eb22fed (diff) | |
drm/radeon/dpm/rs780: don't enable sclk scaling if not required
commit e40210cca98068835acd5a4fe760bf96b3a1aa48 upstream.
If the low and high sclks are the same, there is no need to
enable sclk scaling. This causes display stability issues on
certain boards.
Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=60857
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/rs780_dpm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rs780_dpm.c b/drivers/gpu/drm/radeon/rs780_dpm.c index 0f858b85af7..42967233567 100644 --- a/drivers/gpu/drm/radeon/rs780_dpm.c +++ b/drivers/gpu/drm/radeon/rs780_dpm.c @@ -486,6 +486,9 @@ static void rs780_activate_engine_clk_scaling(struct radeon_device *rdev, (new_state->sclk_low == old_state->sclk_low)) return; + if (new_state->sclk_high == new_state->sclk_low) + return; + rs780_clk_scaling_enable(rdev, true); } |