diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-09-13 11:04:28 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-09-15 20:27:51 -0400 |
| commit | c2ee29d00266a9a80fb312042b14a56f8baf978d (patch) | |
| tree | 587474373dcbf27f2a29063004531cd26b629bda /drivers/gpu/drm/radeon/rs780_dpm.c | |
| parent | e40210cca98068835acd5a4fe760bf96b3a1aa48 (diff) | |
drm/radeon/dpm/rs780: fix force_performance state for same sclks
If the low and high sclks within a power state are the same,
there no need to enable sclk scaling. Enabling sclk scaling
can cause display stability issues on some boards.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rs780_dpm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rs780_dpm.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/rs780_dpm.c b/drivers/gpu/drm/radeon/rs780_dpm.c index eb336bf5a54..6af8505cf4d 100644 --- a/drivers/gpu/drm/radeon/rs780_dpm.c +++ b/drivers/gpu/drm/radeon/rs780_dpm.c @@ -1043,8 +1043,10 @@ int rs780_dpm_force_performance_level(struct radeon_device *rdev, if (pi->voltage_control) rs780_force_voltage(rdev, pi->max_voltage); - WREG32_P(FVTHROT_FBDIV_REG1, 0, ~FORCE_FEEDBACK_DIV); - rs780_clk_scaling_enable(rdev, true); + if (ps->sclk_high != ps->sclk_low) { + WREG32_P(FVTHROT_FBDIV_REG1, 0, ~FORCE_FEEDBACK_DIV); + rs780_clk_scaling_enable(rdev, true); + } if (pi->voltage_control) { rs780_voltage_scaling_enable(rdev, true); |