1 files changed, 46 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3976-drm-amd-powerply-fix-power-reading-on-Fiji.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3976-drm-amd-powerply-fix-power-reading-on-Fiji.patch
new file mode 100644
index 00000000..863a6028
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3976-drm-amd-powerply-fix-power-reading-on-Fiji.patch
@@ -0,0 +1,46 @@
+From 86286c1192838a0931aac74a051cff5ae8073e06 Mon Sep 17 00:00:00 2001
+From: Eric Huang <JinHuiEric.Huang@amd.com>
+Date: Thu, 29 Mar 2018 11:49:51 -0400
+Subject: [PATCH 3976/4131] drm/amd/powerply: fix power reading on Fiji
+
+Power value is wrong reported by customer. It is a regression by
+
+commit a7c7bc4c0c47eaac77b8fa92f0672032df7f4254
+Author: Rex Zhu <Rex.Zhu@amd.com>
+Date:   Mon Mar 27 15:32:59 2017 +0800
+
+    drm/amd/powerplay: reduce sample period time
+
+    for power readings.
+
+    Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
+    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
+    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+
+The theoretical sampling period is from 50ms to 4sec, original 2sec
+is long but correct, and 20ms is too short. change it to more
+reasonable 200ms.
+
+Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
+Acked-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+index 8f40803..123cbfc 100644
+--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
++++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+@@ -3367,7 +3367,8 @@ static int smu7_get_gpu_power(struct pp_hwmgr *hwmgr,
+ 			"Failed to start pm status log!",
+ 			return -1);
+ 
+-	msleep_interruptible(20);
++	/* Sampling period from 50ms to 4sec */
++	msleep_interruptible(200);
+ 
+ 	PP_ASSERT_WITH_CODE(!smum_send_msg_to_smc(hwmgr,
+ 			PPSMC_MSG_PmStatusLogSample),
+-- 
+2.7.4
+