1 files changed, 41 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4671-drm-amd-display-fix-DalDramClockChangeLatencyNs-over.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4671-drm-amd-display-fix-DalDramClockChangeLatencyNs-over.patch
new file mode 100644
index 00000000..e8896e93
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4671-drm-amd-display-fix-DalDramClockChangeLatencyNs-over.patch
@@ -0,0 +1,41 @@
+From 44cfb929dce3ec82a8c4072e8a49547dc301f2ba Mon Sep 17 00:00:00 2001
+From: Joseph Gravenor <joseph.gravenor@amd.com>
+Date: Mon, 4 Nov 2019 16:39:35 -0500
+Subject: [PATCH 4671/4736] drm/amd/display: fix DalDramClockChangeLatencyNs
+ override
+
+[why]
+pstate_latency_us never gets updated from the hard coded value
+in rn_clk_mgr.c
+
+[how]
+update the wm table's values before we do calculations with them
+
+Signed-off-by: Joseph Gravenor <joseph.gravenor@amd.com>
+Reviewed-by: Eric Yang <eric.yang2@amd.com>
+Acked-by: Leo Li <sunpeng.li@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+index 94a5611972cc..23727c3f2e01 100644
+--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
++++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+@@ -1013,9 +1013,12 @@ static void patch_bounding_box(struct dc *dc, struct _vcs_dpi_soc_bounding_box_s
+ 	}
+ 
+ 	if (dc->bb_overrides.dram_clock_change_latency_ns) {
+-		bb->dram_clock_change_latency_us =
++		for (i = 0; i < WM_SET_COUNT; i++) {
++			dc->clk_mgr->bw_params->wm_table.entries[i].pstate_latency_us =
+ 				dc->bb_overrides.dram_clock_change_latency_ns / 1000.0;
++		}
+ 	}
++
+ 	kernel_fpu_end();
+ }
+ 
+-- 
+2.17.1
+