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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4077-drm-amd-display-Add-capability-check-for-static-ramp.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4077-drm-amd-display-Add-capability-check-for-static-ramp.patch40
1 files changed, 40 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4077-drm-amd-display-Add-capability-check-for-static-ramp.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4077-drm-amd-display-Add-capability-check-for-static-ramp.patch
new file mode 100644
index 00000000..6c178fb4
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4077-drm-amd-display-Add-capability-check-for-static-ramp.patch
@@ -0,0 +1,40 @@
+From a3341c8396d18832ea305384a18e0cc3095f38fa Mon Sep 17 00:00:00 2001
+From: Jaehyun Chung <jaehyun.chung@amd.com>
+Date: Mon, 23 Sep 2019 10:00:57 -0400
+Subject: [PATCH 4077/4256] drm/amd/display: Add capability check for static
+ ramp calc
+
+[Why]
+Static ramp to max refresh rate does not have capability check on
+calculated v_total. Programming a lower v_total_min and max than the
+total causes continuous spurious HPDs.
+
+[How]
+Add a capability check after v_total calculation similar to calculate
+v_total helper functions.
+
+Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
+Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
+Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
+---
+ drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+index 65faaf6802e0..9d68cfecd472 100644
+--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
++++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+@@ -232,6 +232,10 @@ static void update_v_total_for_static_ramp(
+ current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
+ stream->timing.h_total), 1000);
+
++ /* v_total cannot be less than nominal */
++ if (v_total < stream->timing.v_total)
++ v_total = stream->timing.v_total;
++
+ in_out_vrr->adjust.v_total_min = v_total;
+ in_out_vrr->adjust.v_total_max = v_total;
+ }
+--
+2.17.1
+