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drm/amdgpu: refine set power state logic for dpm. 

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2016-10-14 19:23:34 +08:00 committed by Alex Deucher
parent 8c8e2c30d2
commit 5e876c62d8
1 changed files with 16 additions and 66 deletions
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82
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
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@ -986,10 +986,10 @@ restart_search:
static void amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
{
int i;
struct amdgpu_ps *ps;
enum amd_pm_state_type dpm_state;
int ret;
bool equal;
/* if dpm init failed */
if (!adev->pm.dpm_enabled)
@ -1009,46 +1009,6 @@ static void amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
else
return;
/* no need to reprogram if nothing changed unless we are on BTC+ */
if (adev->pm.dpm.current_ps == adev->pm.dpm.requested_ps) {
/* vce just modifies an existing state so force a change */
if (ps->vce_active != adev->pm.dpm.vce_active)
goto force;
if (adev->flags & AMD_IS_APU) {
/* for APUs if the num crtcs changed but state is the same,
* all we need to do is update the display configuration.
*/
if (adev->pm.dpm.new_active_crtcs != adev->pm.dpm.current_active_crtcs) {
/* update display watermarks based on new power state */
amdgpu_display_bandwidth_update(adev);
/* update displays */
amdgpu_dpm_display_configuration_changed(adev);
adev->pm.dpm.current_active_crtcs = adev->pm.dpm.new_active_crtcs;
adev->pm.dpm.current_active_crtc_count = adev->pm.dpm.new_active_crtc_count;
}
return;
} else {
/* for BTC+ if the num crtcs hasn't changed and state is the same,
* nothing to do, if the num crtcs is > 1 and state is the same,
* update display configuration.
*/
if (adev->pm.dpm.new_active_crtcs ==
adev->pm.dpm.current_active_crtcs) {
return;
} else if ((adev->pm.dpm.current_active_crtc_count > 1) &&
(adev->pm.dpm.new_active_crtc_count > 1)) {
/* update display watermarks based on new power state */
amdgpu_display_bandwidth_update(adev);
/* update displays */
amdgpu_dpm_display_configuration_changed(adev);
adev->pm.dpm.current_active_crtcs = adev->pm.dpm.new_active_crtcs;
adev->pm.dpm.current_active_crtc_count = adev->pm.dpm.new_active_crtc_count;
return;
}
}
}
force:
if (amdgpu_dpm == 1) {
printk("switching from power state:\n");
amdgpu_dpm_print_power_state(adev, adev->pm.dpm.current_ps);
@ -1059,31 +1019,21 @@ force:
/* update whether vce is active */
ps->vce_active = adev->pm.dpm.vce_active;
amdgpu_dpm_display_configuration_changed(adev);
ret = amdgpu_dpm_pre_set_power_state(adev);
if (ret)
return;
/* update display watermarks based on new power state */
amdgpu_display_bandwidth_update(adev);
if ((0 != amgdpu_dpm_check_state_equal(adev, adev->pm.dpm.current_ps, adev->pm.dpm.requested_ps, &equal)))
equal = false;
/* wait for the rings to drain */
for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
struct amdgpu_ring *ring = adev->rings[i];
if (ring && ring->ready)
amdgpu_fence_wait_empty(ring);
}
if (equal)
return;
/* program the new power state */
amdgpu_dpm_set_power_state(adev);
/* update current power state */
adev->pm.dpm.current_ps = adev->pm.dpm.requested_ps;
amdgpu_dpm_post_set_power_state(adev);
/* update displays */
amdgpu_dpm_display_configuration_changed(adev);
adev->pm.dpm.current_active_crtcs = adev->pm.dpm.new_active_crtcs;
adev->pm.dpm.current_active_crtc_count = adev->pm.dpm.new_active_crtc_count;
@ -1276,20 +1226,20 @@ void amdgpu_pm_compute_clocks(struct amdgpu_device *adev)
struct drm_device *ddev = adev->ddev;
struct drm_crtc *crtc;
struct amdgpu_crtc *amdgpu_crtc;
int i = 0;
if (!adev->pm.dpm_enabled)
return;
amdgpu_display_bandwidth_update(adev);
for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
struct amdgpu_ring *ring = adev->rings[i];
if (ring && ring->ready)
amdgpu_fence_wait_empty(ring);
}
if (adev->pp_enabled) {
int i = 0;
amdgpu_display_bandwidth_update(adev);
for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
struct amdgpu_ring *ring = adev->rings[i];
if (ring && ring->ready)
amdgpu_fence_wait_empty(ring);
}
amdgpu_dpm_dispatch_task(adev, AMD_PP_EVENT_DISPLAY_CONFIG_CHANGE, NULL, NULL);
} else {
mutex_lock(&adev->pm.mutex);