drm/amd/display: Allow IPS2 during Replay

[Why & How]
Add regkey to block video playback in IPS2 by default

Allow idle optimizations in the same spot we allow Replay for
video playback usecases.

Avoid sending it when there's an external display connected by
modifying the allow idle checks to check for active non-eDP screens.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Nicholas Kazlauskas

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -1717,6 +1717,8 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	init_data.flags.disable_ips = DMUB_IPS_DISABLE_ALL;
 
+	init_data.flags.disable_ips_in_vpb = 1;
+
 	/* Enable DWB for tested platforms only */
 	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 0, 0))
 		init_data.num_virtual_links = 1;

drivers/gpu/drm/amd/display/dc/dc.h

@@ -434,6 +434,7 @@ struct dc_config {
 	bool EnableMinDispClkODM;
 	bool enable_auto_dpm_test_logs;
 	unsigned int disable_ips;
+	unsigned int disable_ips_in_vpb;
 };
 
 enum visual_confirm {

drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c

@@ -680,14 +680,21 @@ void dcn35_power_down_on_boot(struct dc *dc)
 bool dcn35_apply_idle_power_optimizations(struct dc *dc, bool enable)
 {
 	struct dc_link *edp_links[MAX_NUM_EDP];
-	int edp_num;
+	int i, edp_num;
 	if (dc->debug.dmcub_emulation)
 		return true;
 
 	if (enable) {
 		dc_get_edp_links(dc, edp_links, &edp_num);
 		if (edp_num == 0 || edp_num > 1)
 			return false;
+
+		for (i = 0; i < dc->current_state->stream_count; ++i) {
+			struct dc_stream_state *stream = dc->current_state->streams[i];
+
+			if (!stream->dpms_off && !dc_is_embedded_signal(stream->signal))
+				return false;
+		}
 	}
 
 	// TODO: review other cases when idle optimization is allowed