diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-07-08 12:09:41 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-07-08 17:41:01 -0400 |
| commit | 76ad73e549ff39cbb235dae3a14902bb6ca12d53 (patch) | |
| tree | 63f72af32e0e06ddee422b70c530e83cc7587c9e /drivers/gpu/drm/radeon/ni_dpm.c | |
| parent | a84301c65d256d8aa23a254a6f2d51ecf67e9ee5 (diff) | |
drm/radeon/dpm: implement vblank_too_short callback for cayman
Check if we can switch the mclk during the vblank time otherwise
we may get artifacts on the screen when the mclk changes.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/ni_dpm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/ni_dpm.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/ni_dpm.c b/drivers/gpu/drm/radeon/ni_dpm.c index bd96eaa3f015..559cf24d51af 100644 --- a/drivers/gpu/drm/radeon/ni_dpm.c +++ b/drivers/gpu/drm/radeon/ni_dpm.c @@ -765,6 +765,19 @@ static void ni_calculate_leakage_for_v_and_t(struct radeon_device *rdev, ni_calculate_leakage_for_v_and_t_formula(coeff, v, t, i_leakage, leakage); } +bool ni_dpm_vblank_too_short(struct radeon_device *rdev) +{ + struct rv7xx_power_info *pi = rv770_get_pi(rdev); + u32 vblank_time = r600_dpm_get_vblank_time(rdev); + u32 switch_limit = pi->mem_gddr5 ? 450 : 300; + + if (vblank_time < switch_limit) + return true; + else + return false; + +} + static void ni_apply_state_adjust_rules(struct radeon_device *rdev, struct radeon_ps *rps) { @@ -775,7 +788,8 @@ static void ni_apply_state_adjust_rules(struct radeon_device *rdev, u16 vddc, vddci; int i; - if (rdev->pm.dpm.new_active_crtc_count > 1) + if ((rdev->pm.dpm.new_active_crtc_count > 1) || + ni_dpm_vblank_too_short(rdev)) disable_mclk_switching = true; else disable_mclk_switching = false; |