1 files changed, 35 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2836-drm-amd-display-dcn20-include-linux-delay.h.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2836-drm-amd-display-dcn20-include-linux-delay.h.patch
new file mode 100644
index 00000000..ce45c17c
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2836-drm-amd-display-dcn20-include-linux-delay.h.patch
@@ -0,0 +1,35 @@
+From 266fe96197cae32094d8e503534248e427d1e59b Mon Sep 17 00:00:00 2001
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Mon, 8 Jul 2019 15:53:18 +0200
+Subject: [PATCH 2836/2940] drm/amd/display: dcn20: include linux/delay.h
+
+Without this header, we get a compiler error in some configurations:
+
+.../dc/dcn20/dcn20_hwseq.c: In function 'dcn20_hwss_wait_for_blank_complete':
+.../dc/dcn20/dcn20_hwseq.c:1493:3: error: implicit declaration of function 'udelay' [-Werror=implicit-function-declaration]
+
+Note: the use of udelay itself may be problematic, as can occupy
+the CPU for 200ms in a busy-loop here.
+
+Fixes: 7ed4e6352c16 ("drm/amd/display: Add DCN2 HW Sequencer and Resource")
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+index 4b0d8b9f61da..6925d25d2457 100644
+--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
++++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+@@ -22,6 +22,7 @@
+  * Authors: AMD
+  *
+  */
++#include <linux/delay.h>
+ 
+ #include "dm_services.h"
+ #include "dm_helpers.h"
+-- 
+2.17.1
+