1 files changed, 35 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2724-drm-amd-display-add-warning-on-long-reg_wait.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2724-drm-amd-display-add-warning-on-long-reg_wait.patch
new file mode 100644
index 00000000..b083e4a9
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2724-drm-amd-display-add-warning-on-long-reg_wait.patch
@@ -0,0 +1,35 @@
+From aaefbca5879edfe949431ab174d2fc4b0bb6a6a5 Mon Sep 17 00:00:00 2001
+From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
+Date: Thu, 2 Nov 2017 14:55:14 -0400
+Subject: [PATCH 2724/4131] drm/amd/display: add warning on long reg_wait
+
+Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
+Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
+Acked-by: Harry Wentland <harry.wentland@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dc_helper.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c
+index 0d84b2a..c584252 100644
+--- a/drivers/gpu/drm/amd/display/dc/dc_helper.c
++++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c
+@@ -156,8 +156,13 @@ uint32_t generic_reg_wait(const struct dc_context *ctx,
+ 
+ 		field_value = get_reg_field_value_ex(reg_val, mask, shift);
+ 
+-		if (field_value == condition_value)
++		if (field_value == condition_value) {
++			if (i * delay_between_poll_us > 1000)
++				dm_output_to_console("REG_WAIT taking a while: %dms in %s line:%d\n",
++						delay_between_poll_us * i / 1000,
++						func_name, line);
+ 			return reg_val;
++		}
+ 	}
+ 
+ 	dm_error("REG_WAIT timeout %dus * %d tries - %s line:%d\n",
+-- 
+2.7.4
+