diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3096-drm-amd-display-Fix-topology-change-issue-in-MST-reh.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3096-drm-amd-display-Fix-topology-change-issue-in-MST-reh.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3096-drm-amd-display-Fix-topology-change-issue-in-MST-reh.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3096-drm-amd-display-Fix-topology-change-issue-in-MST-reh.patch new file mode 100644 index 00000000..d3fb0533 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3096-drm-amd-display-Fix-topology-change-issue-in-MST-reh.patch @@ -0,0 +1,39 @@ +From 7df380bd36399caf8a2efde0ddfe82495b83f5d1 Mon Sep 17 00:00:00 2001 +From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo@amd.com> +Date: Tue, 12 Dec 2017 17:33:57 -0500 +Subject: [PATCH 3096/4131] drm/amd/display: Fix topology change issue in MST + rehook + +When topology changed and rehook up MST display to the same DP +connector, need to take care of drm_dp_mst_port object. + +Due to the topology is changed, drm_dp_mst_port and corresponding +i2c_algorithm object could be NULL in such situation. + +Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com> +Reviewed-by: Roman Li <Roman.Li@amd.com> +Acked-by: Harry Wentland <harry.wentland@amd.com> +--- + drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +index 41ca3b1..f7d0a40 100644 +--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c ++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +@@ -196,6 +196,12 @@ void dm_dp_mst_dc_sink_create(struct drm_connector *connector) + .link = aconnector->dc_link, + .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST }; + ++ /* ++ * TODO: Need to further figure out why ddc.algo is NULL while MST port exists ++ */ ++ if (!aconnector->port || !aconnector->port->aux.ddc.algo) ++ return; ++ + edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port); + + if (!edid) { +-- +2.7.4 + |