diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/4129-drm-amd-display-fix-multisync-for-any-connection-ena.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/4129-drm-amd-display-fix-multisync-for-any-connection-ena.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/4129-drm-amd-display-fix-multisync-for-any-connection-ena.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/4129-drm-amd-display-fix-multisync-for-any-connection-ena.patch new file mode 100644 index 00000000..9fff7e17 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/4129-drm-amd-display-fix-multisync-for-any-connection-ena.patch @@ -0,0 +1,64 @@ +From b677251cfba0a671c071a6319eea7c98727b400c Mon Sep 17 00:00:00 2001 +From: Yogesh Mohan Marimuthu <yogesh.mohanmarimuthu@amd.com> +Date: Mon, 17 Sep 2018 16:11:16 +0530 +Subject: [PATCH 4129/4131] drm/amd/display: fix multisync for any + connection/enabling order of displays + +[Why] +When 2 displays(supporting multi sync) each for 2 given resolution(say 1080p +and 720p) is attached and if least refresh rate(720p) display is the last +monitor attached/enabled then the last monitor is not in sync. This is +happening since in program_timing_sync() function, 2 groups are created, one +group with 2 1080p monitors and another group with 2 720p monitors. In 2nd +group one of the 720p monitor becomes the master, but for the 4 multi sync +supported monitors attached, the highest refresh rate(1080p) display will +be the master, Since 720p is the master in program_timing_sync(), the last +720p monitor goes out of sync. + +[how] +Fixed it by not allowing to create groups for multi sync supported monitors +which doesn't have the resolution/timing of the multi sync master. + +Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohanmarimuthu@amd.com> +--- + drivers/gpu/drm/amd/display/dc/core/dc.c | 17 +++++++++++++++++ + 1 file changed, 17 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c +index e97d700..898c801 100644 +--- a/drivers/gpu/drm/amd/display/dc/core/dc.c ++++ b/drivers/gpu/drm/amd/display/dc/core/dc.c +@@ -665,6 +665,19 @@ static void enable_timing_multisync( + } + } + ++static int is_multisync_master_timing( ++ struct pipe_ctx *pipe) ++{ ++ if (pipe->stream->triggered_crtc_reset.enabled && ++ pipe->stream->triggered_crtc_reset.event_source) { ++ if (resource_are_streams_timing_synchronizable( ++ pipe->stream, ++ pipe->stream->triggered_crtc_reset.event_source)) ++ return true; ++ } ++ return false; ++} ++ + static void program_timing_sync( + struct dc *dc, + struct dc_state *ctx) +@@ -688,6 +701,10 @@ static void program_timing_sync( + if (!unsynced_pipes[i]) + continue; + ++ if (unsynced_pipes[i]->stream->triggered_crtc_reset.enabled && ++ !is_multisync_master_timing(unsynced_pipes[i])) ++ continue; ++ + pipe_set[0] = unsynced_pipes[i]; + unsynced_pipes[i] = NULL; + +-- +2.7.4 + |