[PATCH 4/4] drm/amd/display: Update HW_DONE_DEADLINE property value on modeset

[Michel Dänzer]

From: Michel Dänzer <mdaen...@redhat.com>

Set it to the end of the front porch.

Signed-off-by: Michel Dänzer <mdaen...@redhat.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 0b8ac9edc070..e78249b55345 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10021,6 +10021,21 @@ static void dm_set_writeback(struct 
amdgpu_display_manager *dm,
        drm_writeback_queue_job(wb_conn, new_con_state);
 }
 
+static void
+update_hw_done_deadline(struct dm_crtc_state *dm_new_crtc_state)
+{
+       struct dc_stream_state *stream = dm_new_crtc_state->stream;
+       struct dc_crtc_timing *timing = &stream->timing;
+       struct drm_crtc *crtc = dm_new_crtc_state->base.crtc;
+       uint32_t deadline_lines, deadline_us;
+
+       /* XXX: My guess, AMD display team to the rescue! */
+       deadline_lines = timing->v_total - timing->v_addressable - 
timing->v_front_porch;
+       deadline_us = DIV_ROUND_UP(deadline_lines * stream->timing.h_total * 
10000u,
+                                  stream->timing.pix_clk_100hz);
+       drm_crtc_set_hw_done_deadline_property(crtc, deadline_us);
+}
+
 /**
  * amdgpu_dm_atomic_commit_tail() - AMDgpu DM's commit tail implementation.
  * @state: The atomic state to commit
@@ -10419,6 +10434,13 @@ static void amdgpu_dm_atomic_commit_tail(struct 
drm_atomic_state *state)
        /* Signal HW programming completion */
        drm_atomic_helper_commit_hw_done(state);
 
+       for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, 
new_crtc_state, i) {
+               if (new_crtc_state->active &&
+                   (!old_crtc_state->active ||
+                    drm_atomic_crtc_needs_modeset(new_crtc_state)))
+                       
update_hw_done_deadline(to_dm_crtc_state(new_crtc_state));
+       }
+
        if (wait_for_vblank)
                drm_atomic_helper_wait_for_flip_done(dev, state);
 
-- 
2.50.0