1 files changed, 39 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2926-drm-amd-display-fix-missing-pixel-clock-adjustment-f.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2926-drm-amd-display-fix-missing-pixel-clock-adjustment-f.patch
new file mode 100644
index 00000000..3c604814
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2926-drm-amd-display-fix-missing-pixel-clock-adjustment-f.patch
@@ -0,0 +1,39 @@
+From d291920630985a1df4ba4ca4a006535a17fedfb3 Mon Sep 17 00:00:00 2001
+From: Eric Yang <Eric.Yang2@amd.com>
+Date: Fri, 10 Nov 2017 10:44:24 -0500
+Subject: [PATCH 2926/4131] drm/amd/display: fix missing pixel clock adjustment
+ for dongle
+
+Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
+Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
+Reviewed-by: Andrew Jiang <Andrew.Jiang@amd.com>
+Acked-by: Harry Wentland <harry.wentland@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+index 0b7058f..1399589 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+@@ -1801,7 +1801,7 @@ static void disable_link(struct dc_link *link, enum signal_type signal)
+ 		link->link_enc->funcs->disable_output(link->link_enc, signal);
+ }
+ 
+-bool dp_active_dongle_validate_timing(
++static bool dp_active_dongle_validate_timing(
+ 		const struct dc_crtc_timing *timing,
+ 		const struct dc_dongle_caps *dongle_caps)
+ {
+@@ -1833,6 +1833,8 @@ bool dp_active_dongle_validate_timing(
+ 	/* Check Color Depth and Pixel Clock */
+ 	if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
+ 		required_pix_clk /= 2;
++	else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
++		required_pix_clk = required_pix_clk * 2 / 3;
+ 
+ 	switch (timing->display_color_depth) {
+ 	case COLOR_DEPTH_666:
+-- 
+2.7.4
+