drm/amd/display: Move link functions from dc to dc_link

[Why]
link-specific functions should reside in dc_link.c

[How]
Move them there.

Signed-off-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 126 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 90a1cdc26d23..c9e0b126777b 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2339,7 +2339,8 @@ void core_link_resume(struct dc_link *link)
 static struct fixed31_32 get_pbn_per_slot(struct dc_stream_state *stream)
 {
 	struct fixed31_32 mbytes_per_sec;
-	uint32_t link_rate_in_mbytes_per_sec = dc_link_bandwidth_kbps(stream->link, &stream->link->cur_link_settings);
+	uint32_t link_rate_in_mbytes_per_sec = dc_link_bandwidth_kbps(stream->link,
+			&stream->link->cur_link_settings);
 	link_rate_in_mbytes_per_sec /= 8000; /* Kbits to MBytes */
 
 	mbytes_per_sec = dc_fixpt_from_int(link_rate_in_mbytes_per_sec);
@@ -2858,3 +2859,127 @@ uint32_t dc_bandwidth_in_kbps_from_timing(
 	return kbps;
 
 }
+
+void dc_link_set_drive_settings(struct dc *dc,
+				struct link_training_settings *lt_settings,
+				const struct dc_link *link)
+{
+
+	int i;
+
+	for (i = 0; i < dc->link_count; i++) {
+		if (dc->links[i] == link)
+			break;
+	}
+
+	if (i >= dc->link_count)
+		ASSERT_CRITICAL(false);
+
+	dc_link_dp_set_drive_settings(dc->links[i], lt_settings);
+}
+
+void dc_link_perform_link_training(struct dc *dc,
+				   struct dc_link_settings *link_setting,
+				   bool skip_video_pattern)
+{
+	int i;
+
+	for (i = 0; i < dc->link_count; i++)
+		dc_link_dp_perform_link_training(
+			dc->links[i],
+			link_setting,
+			skip_video_pattern);
+}
+
+void dc_link_set_preferred_link_settings(struct dc *dc,
+					 struct dc_link_settings *link_setting,
+					 struct dc_link *link)
+{
+	int i;
+	struct pipe_ctx *pipe;
+	struct dc_stream_state *link_stream;
+	struct dc_link_settings store_settings = *link_setting;
+
+	link->preferred_link_setting = store_settings;
+
+	/* Retrain with preferred link settings only relevant for
+	 * DP signal type
+	 */
+	if (!dc_is_dp_signal(link->connector_signal))
+		return;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+		if (pipe->stream && pipe->stream->link) {
+			if (pipe->stream->link == link)
+				break;
+		}
+	}
+
+	/* Stream not found */
+	if (i == MAX_PIPES)
+		return;
+
+	link_stream = link->dc->current_state->res_ctx.pipe_ctx[i].stream;
+
+	/* Cannot retrain link if backend is off */
+	if (link_stream->dpms_off)
+		return;
+
+	if (link_stream)
+		decide_link_settings(link_stream, &store_settings);
+
+	if ((store_settings.lane_count != LANE_COUNT_UNKNOWN) &&
+		(store_settings.link_rate != LINK_RATE_UNKNOWN))
+		dp_retrain_link_dp_test(link, &store_settings, false);
+}
+
+void dc_link_enable_hpd(const struct dc_link *link)
+{
+	dc_link_dp_enable_hpd(link);
+}
+
+void dc_link_disable_hpd(const struct dc_link *link)
+{
+	dc_link_dp_disable_hpd(link);
+}
+
+
+void dc_link_set_test_pattern(struct dc_link *link,
+			      enum dp_test_pattern test_pattern,
+			      const struct link_training_settings *p_link_settings,
+			      const unsigned char *p_custom_pattern,
+			      unsigned int cust_pattern_size)
+{
+	if (link != NULL)
+		dc_link_dp_set_test_pattern(
+			link,
+			test_pattern,
+			p_link_settings,
+			p_custom_pattern,
+			cust_pattern_size);
+}
+
+uint32_t dc_link_bandwidth_kbps(
+	const struct dc_link *link,
+	const struct dc_link_settings *link_setting)
+{
+	uint32_t link_bw_kbps =
+		link_setting->link_rate * LINK_RATE_REF_FREQ_IN_KHZ; /* bytes per sec */
+
+	link_bw_kbps *= 8;   /* 8 bits per byte*/
+	link_bw_kbps *= link_setting->lane_count;
+
+	return link_bw_kbps;
+
+}
+
+const struct dc_link_settings *dc_link_get_link_cap(
+		const struct dc_link *link)
+{
+	if (link->preferred_link_setting.lane_count != LANE_COUNT_UNKNOWN &&
+			link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN)
+		return &link->preferred_link_setting;
+	return &link->verified_link_cap;
+}
+