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-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.19.8/0026-drm-amd-display-pass-the-right-num-of-modes-added.patch39
1 files changed, 39 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/0026-drm-amd-display-pass-the-right-num-of-modes-added.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/0026-drm-amd-display-pass-the-right-num-of-modes-added.patch
new file mode 100644
index 00000000..ccde5b73
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/0026-drm-amd-display-pass-the-right-num-of-modes-added.patch
@@ -0,0 +1,39 @@
+From db4db59745f3ef638cdb63e2cabe572f250d287a Mon Sep 17 00:00:00 2001
+From: Mikita Lipski <mikita.lipski@amd.com>
+Date: Thu, 26 Jul 2018 16:27:48 -0400
+Subject: [PATCH 0026/2940] drm/amd/display: pass the right num of modes added
+
+[why]
+In case if edid is null or corrupted we need to manually add
+a single failsafe mode (640x480). If zero modes returned
+DRM adds a different failsafe mode that is not accepted by
+DP 1.2 compliance test
+
+[how]
+Return the number of modes manually added
+
+Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
+Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com>
+Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+index 1d67509c2f15..ea01eaa91f52 100644
+--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+@@ -3597,7 +3597,8 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
+ encoder = helper->best_encoder(connector);
+
+ if (!edid || !drm_edid_is_valid(edid)) {
+- drm_add_modes_noedid(connector, 640, 480);
++ amdgpu_dm_connector->num_modes =
++ drm_add_modes_noedid(connector, 640, 480);
+ } else {
+ amdgpu_dm_connector_ddc_get_modes(connector, edid);
+ amdgpu_dm_connector_add_common_modes(encoder, connector);
+--
+2.17.1
+