drm/amd/display: make PSR static screen entry within 30 ms

[Why]
With different refresh rate panels, the PSR entry/exit time is
different since it is dependent on 2 frame entry time today

[How]
Make static screen num frame entry time to be calculated
such that entry time is within 30 ms instead of fixed num
frames.

Signed-off-by: Anthony Koo <[email protected]>
Reviewed-by: Tony Cheng <[email protected]>
Acked-by: Aric Cyr <[email protected]>
Acked-by: Harry Wentland <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 26 insertions, 6 deletions

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 504278d94c22..9402374d2466 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8393,17 +8393,37 @@ static bool amdgpu_dm_link_setup_psr(struct dc_stream_state *stream)
 bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
 {
 	struct dc_link *link = stream->link;
-	struct dc_static_screen_events triggers = {0};
+	unsigned int vsync_rate_hz = 0;
+	struct dc_static_screen_params params = {0};
+	/* Calculate number of static frames before generating interrupt to
+	 * enter PSR.
+	 */
+	unsigned int frame_time_microsec = 1000000 / vsync_rate_hz;
+	// Init fail safe of 2 frames static
+	unsigned int num_frames_static = 2;
 
 	DRM_DEBUG_DRIVER("Enabling psr...\n");
 
-	triggers.cursor_update = true;
-	triggers.overlay_update = true;
-	triggers.surface_update = true;
+	vsync_rate_hz = div64_u64(div64_u64((
+			stream->timing.pix_clk_100hz * 100),
+			stream->timing.v_total),
+			stream->timing.h_total);
+
+	/* Round up
+	 * Calculate number of frames such that at least 30 ms of time has
+	 * passed.
+	 */
+	if (vsync_rate_hz != 0)
+		num_frames_static = (30000 / frame_time_microsec) + 1;
+
+	params.triggers.cursor_update = true;
+	params.triggers.overlay_update = true;
+	params.triggers.surface_update = true;
+	params.num_frames = num_frames_static;
 
-	dc_stream_set_static_screen_events(link->ctx->dc,
+	dc_stream_set_static_screen_params(link->ctx->dc,
 					   &stream, 1,
-					   &triggers);
+					   &params);
 
 	return dc_link_set_psr_allow_active(link, true, false);
 }