diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-07-15 18:24:31 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-08-30 16:30:31 -0400 |
| commit | 5496131e458e6bbee7f7bdf6f116d150c6dcf728 (patch) | |
| tree | 5b7196c611083f8ff277fe96934308affcc9cc5a /drivers/gpu/drm/radeon/ci_dpm.c | |
| parent | 89536fd600f9997e776eef6c666cc61ea8c55f07 (diff) | |
drm/radeon/dpm: implement vblank_too_short callback for CI
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/ci_dpm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/ci_dpm.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c index 9eebf1f7e22..6e3d387a738 100644 --- a/drivers/gpu/drm/radeon/ci_dpm.c +++ b/drivers/gpu/drm/radeon/ci_dpm.c @@ -682,6 +682,19 @@ static void ci_dpm_powergate_uvd(struct radeon_device *rdev, bool gate) ci_update_uvd_dpm(rdev, gate); } +bool ci_dpm_vblank_too_short(struct radeon_device *rdev) +{ + struct ci_power_info *pi = ci_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 ci_apply_state_adjust_rules(struct radeon_device *rdev, struct radeon_ps *rps) { @@ -692,7 +705,8 @@ static void ci_apply_state_adjust_rules(struct radeon_device *rdev, u32 sclk, mclk; int i; - if (rdev->pm.dpm.new_active_crtc_count > 1) + if ((rdev->pm.dpm.new_active_crtc_count > 1) || + ci_dpm_vblank_too_short(rdev)) disable_mclk_switching = true; else disable_mclk_switching = false; |