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drm/radeon/dpm: implement vblank_too_short callback for si

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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>
This commit is contained in:
Alex Deucher 2013-07-08 12:15:11 -04:00
parent 76ad73e549
commit f4dec31861
3 changed files with 5 additions and 1 deletions
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2
drivers/gpu/drm/radeon/ni_dpm.h
View file

@ -245,4 +245,6 @@ void ni_set_uvd_clock_after_set_eng_clock(struct radeon_device *rdev,
struct radeon_ps *new_ps,
struct radeon_ps *old_ps);
bool ni_dpm_vblank_too_short(struct radeon_device *rdev);
#endif

1
drivers/gpu/drm/radeon/radeon_asic.c
View file

@ -2294,6 +2294,7 @@ static struct radeon_asic si_asic = {
.print_power_state = &ni_dpm_print_power_state,
.debugfs_print_current_performance_level = &si_dpm_debugfs_print_current_performance_level,
.force_performance_level = &si_dpm_force_performance_level,
.vblank_too_short = &ni_dpm_vblank_too_short,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,

3
drivers/gpu/drm/radeon/si_dpm.c
View file

@ -2906,7 +2906,8 @@ static void si_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;