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drm/radeon/dpm: add checks against vblank time 

If the vblank time is too short to adjust mclk,
assume multiple displays (no mclk adjustments).

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-07-08 11:35:06 -04:00
parent 66edc1c95d
commit 4878306935
2 changed files with 13 additions and 3 deletions
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2
drivers/gpu/drm/radeon/radeon.h
View File

@ -1678,6 +1678,7 @@ struct radeon_asic {
void (*print_power_state)(struct radeon_device *rdev, struct radeon_ps *ps);
void (*debugfs_print_current_performance_level)(struct radeon_device *rdev, struct seq_file *m);
int (*force_performance_level)(struct radeon_device *rdev, enum radeon_dpm_forced_level level);
bool (*vblank_too_short)(struct radeon_device *rdev);
} dpm;
/* pageflipping */
struct {
@ -2446,6 +2447,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
#define radeon_dpm_print_power_state(rdev, ps) rdev->asic->dpm.print_power_state((rdev), (ps))
#define radeon_dpm_debugfs_print_current_performance_level(rdev, m) rdev->asic->dpm.debugfs_print_current_performance_level((rdev), (m))
#define radeon_dpm_force_performance_level(rdev, l) rdev->asic->dpm.force_performance_level((rdev), (l))
#define radeon_dpm_vblank_too_short(rdev) rdev->asic->dpm.vblank_too_short((rdev))
/* Common functions */
/* AGP */

14
drivers/gpu/drm/radeon/radeon_pm.c
View File

@ -633,6 +633,14 @@ static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev,
int i;
struct radeon_ps *ps;
u32 ui_class;
bool single_display = (rdev->pm.dpm.new_active_crtc_count < 2) ?
true : false;
/* check if the vblank period is too short to adjust the mclk */
if (single_display && rdev->asic->dpm.vblank_too_short) {
if (radeon_dpm_vblank_too_short(rdev))
single_display = false;
}
/* certain older asics have a separare 3D performance state,
* so try that first if the user selected performance
@ -653,7 +661,7 @@ restart_search:
case POWER_STATE_TYPE_BATTERY:
if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BATTERY) {
if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
if (rdev->pm.dpm.new_active_crtc_count < 2)
if (single_display)
return ps;
} else
return ps;
@ -662,7 +670,7 @@ restart_search:
case POWER_STATE_TYPE_BALANCED:
if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BALANCED) {
if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
if (rdev->pm.dpm.new_active_crtc_count < 2)
if (single_display)
return ps;
} else
return ps;
@ -671,7 +679,7 @@ restart_search:
case POWER_STATE_TYPE_PERFORMANCE:
if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_PERFORMANCE) {
if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
if (rdev->pm.dpm.new_active_crtc_count < 2)
if (single_display)
return ps;
} else
return ps;