From: Jordan Lazare <Jordan.Lazare@amd.com>
Date: Fri, 31 Mar 2017 17:14:20 -0400
Subject: drm/amd/display: Log clock source in error condition
Git-commit: 7160c74cd00bc0a5f143c24096e1a45c51f3d202
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Jordan Lazare <Jordan.Lazare@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.c
@@ -187,6 +187,7 @@ void dce_crtc_switch_to_clk_src(struct d
 			REG_UPDATE(PHYPLL_PIXEL_RATE_CNTL[tg_inst],
 					PIXEL_RATE_PLL_SOURCE, 1);
 	} else {
-		DC_ERR("unknown clock source");
+		DC_ERR("Unknown clock source. clk_src id: %d, TG_inst: %d",
+		       clk_src->id, tg_inst);
 	}
 }