[PATCH 79/82] drm/amd/display: Populate vblank_nom according to bounding box

From: Dillon Varone <[email protected]>

[Why&How]
Wrapper currently populates the vblank nom as the entire blank for a
given timing. This should be constrained to a sane maximum but still
controlled by the caller's (wrapper) policy, which for now will be the
existing bounding box value.

Reviewed-by: Austin Zheng <[email protected]>
Signed-off-by: Dillon Varone <[email protected]>
Signed-off-by: Ivan Lipski <[email protected]>
---
 .../dc/dml2_0/dml21/dml21_translation_helper.c  | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/dml21_translation_helper.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/dml21_translation_helper.c
index d456fb3d616d4..db78810f2b906 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/dml21_translation_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/dml21_translation_helper.c
@@ -95,6 +95,20 @@ static unsigned int calc_max_hardware_v_total(const struct dc_stream_state *stre
 	return max_hw_v_total;
 }
 
+static unsigned int calc_vblank_nom_lines(const struct dc_stream_state *stream, const unsigned int default_vblank_nom_us)
+{
+	unsigned int vblank_avail = stream->timing.v_total - stream->timing.v_addressable;
+	unsigned int vblank_nom = (unsigned int)div64_u64((uint64_t)default_vblank_nom_us * 1000ULL, // vblank_nom_ns
+			div64_u64((uint64_t)stream->timing.h_total * 10000000ULL, (uint64_t)stream->timing.pix_clk_100hz)); // line_time_ns
+
+	if (vblank_avail < vblank_nom ||
+			stream->adaptive_sync_infopacket.valid ||
+			(stream->link && stream->link->replay_settings.config.replay_supported))
+		vblank_nom = vblank_avail;
+
+	return vblank_nom;
+}
+
 static void populate_dml21_timing_config_from_stream_state(struct dml2_timing_cfg *timing,
 		struct dc_stream_state *stream,
 		struct pipe_ctx *otg_master_pipe,
@@ -200,7 +214,7 @@ static void populate_dml21_timing_config_from_stream_state(struct dml2_timing_cf
 		break;
 	}
 
-	timing->vblank_nom = timing->v_total - timing->v_active;
+	timing->vblank_nom = calc_vblank_nom_lines(stream, dml_ctx->v21.dml_init.ip_caps.vblank_nom_default_us);
 }
 
 static void populate_dml21_output_config_from_stream_state(struct dml2_link_output_cfg *output,
@@ -1143,4 +1157,3 @@ void dml21_init_min_clocks_for_dc_state(struct dml2_context *in_ctx, struct dc_s
 	min_clocks->stutter_efficiency.z8_stutter_period = 100000;
 	min_clocks->zstate_support = DCN_ZSTATE_SUPPORT_ALLOW;
 }
-
-- 
2.43.0