The watermarks it should calculate against are the old optimal watermarks.
The currently active crtc watermarks are pure fiction, and are invalid in
case of a nonblocking modeset, page flip enabling/disabling planes or any
other reason.
When the crtc is disabled or during a modeset the intermediate watermarks
don't need to be programmed separately, and could be directly assigned
to the optimal watermarks.
Also rename crtc_state to new_crtc_state, to distinguish it from the old state.
Changes since v1:
- Use intel_atomic_get_old_crtc_state. (ville)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 0f344b1fff45..a09396ee1f3d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1458,16 +1458,24 @@ static void vlv_atomic_update_fifo(struct intel_atomic_state *state,
static int vlv_compute_intermediate_wm(struct drm_device *dev,
struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
+ struct intel_crtc_state *new_crtc_state)
{
- struct vlv_wm_state *intermediate = &crtc_state->wm.vlv.intermediate;
- const struct vlv_wm_state *optimal = &crtc_state->wm.vlv.optimal;
- const struct vlv_wm_state *active = &crtc->wm.active.vlv;
+ struct vlv_wm_state *intermediate = &new_crtc_state->wm.vlv.intermediate;
+ const struct vlv_wm_state *optimal = &new_crtc_state->wm.vlv.optimal;
+ const struct intel_crtc_state *old_crtc_state =
+ intel_atomic_get_old_crtc_state(new_crtc_state->base.state, crtc);
+ const struct vlv_wm_state *active = &old_crtc_state->wm.vlv.optimal;
int level;
+ if (!new_crtc_state->base.active || drm_atomic_crtc_needs_modeset(&new_crtc_state->base)) {
+ *intermediate = *optimal;
+
+ return 0;
+ }
+
intermediate->num_levels = min(optimal->num_levels, active->num_levels);
intermediate->cxsr = optimal->cxsr && active->cxsr &&
- !crtc_state->disable_cxsr;
+ !new_crtc_state->disable_cxsr;
for (level = 0; level < intermediate->num_levels; level++) {
enum plane_id plane_id;
@@ -1491,7 +1499,7 @@ static int vlv_compute_intermediate_wm(struct drm_device *dev,
* omit the post-vblank programming; only update if it's different.
*/
if (memcmp(intermediate, optimal, sizeof(*intermediate)) != 0)
- crtc_state->wm.need_postvbl_update = true;
+ new_crtc_state->wm.need_postvbl_update = true;
return 0;
}
--
2.9.3
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