diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2818-drm-amd-display-Do-DC-mode-change-check-when-adding-.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2818-drm-amd-display-Do-DC-mode-change-check-when-adding-.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2818-drm-amd-display-Do-DC-mode-change-check-when-adding-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2818-drm-amd-display-Do-DC-mode-change-check-when-adding-.patch new file mode 100644 index 00000000..495f1b77 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2818-drm-amd-display-Do-DC-mode-change-check-when-adding-.patch @@ -0,0 +1,42 @@ +From c62362e20bd020f2ee45e36ba2dea75979755b18 Mon Sep 17 00:00:00 2001 +From: "Leo (Sunpeng) Li" <sunpeng.li@amd.com> +Date: Fri, 10 Nov 2017 15:02:19 -0500 +Subject: [PATCH 2818/4131] drm/amd/display: Do DC mode-change check when + adding CRTCs + +Within atomic check, dm_update_crtcs_state is called twice. First to +remove from the dc_state, and subsequently to add to it. + +In both calls, a secondary mode-change check is done using dc-level +states. We shouldn't be doing this while removing, since a new +dc_stream_state has not been created to do the necessary comparison. +Because of this, the mode_changed flag within the DRM state can be +mistakenly set to false. Doing so only when adding prevents this. + +We are also guaranteed that a call to add will come after remove, or +else the atomic check fails (and a commit will not happen). + +Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com> +Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> +Acked-by: Harry Wentland <harry.wentland@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- + 1 file changed, 1 insertion(+), 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 b25f5c9..9597a07 100644 +--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c ++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +@@ -4981,7 +4981,7 @@ static int dm_update_crtcs_state(struct dc *dc, + } + } + +- if (dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) && ++ if (enable && dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) && + dc_is_stream_scaling_unchanged(new_stream, dm_old_crtc_state->stream)) { + + new_crtc_state->mode_changed = false; +-- +2.7.4 + |