diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3858-drm-amd-display-Multi-display-synchronization-logic.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3858-drm-amd-display-Multi-display-synchronization-logic.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3858-drm-amd-display-Multi-display-synchronization-logic.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3858-drm-amd-display-Multi-display-synchronization-logic.patch new file mode 100644 index 00000000..9e2bcb8f --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3858-drm-amd-display-Multi-display-synchronization-logic.patch @@ -0,0 +1,50 @@ +From a63b674ee86e587d772f685fba30c5585045c6df Mon Sep 17 00:00:00 2001 +From: Mikita Lipski <mikita.lipski@amd.com> +Date: Tue, 17 Oct 2017 15:29:22 -0400 +Subject: [PATCH 3858/4131] drm/amd/display: Multi display synchronization + logic + +This feature synchronizes multiple displays with various timings +to a display with the highest refresh rate +it is enabled if edid caps flag multi_display_sync is set to one + +There are limitations on refresh rates allowed +that can be synchronized. That would +prevent from underflow and other potential +corruptions. + +Multi display synchronization is using the +same functions as timing_sync in order to minimize +redunduncy and decision to disable synchronization is +based on trigger parametre set in DM + +Feature is developed for DCN1 and DCE11 + +Signed-off-by: Mikita Lipski <mikita.lipski@amd.com> +Reviewed-by: Mikita Lipski <Mikita.Lipski@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 | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +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 094b1c6..97cceb8 100644 +--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c ++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +@@ -2441,8 +2441,10 @@ static void dm_enable_per_frame_crtc_master_sync(struct dc_state *context) + for (i = 0; i < context->stream_count ; i++) { + if (!context->streams[i]) + continue; +- context->streams[i]->triggered_crtc_reset.enabled = +- dm_helpers_parse_amd_vsdb((struct edid *) context->streams[i]->sink->dc_edid.raw_edid); ++ /* TODO: add a function to read AMD VSDB bits and will set ++ * crtc_sync_master.multi_sync_enabled flag ++ * For now its set to false ++ */ + set_multisync_trigger_params(context->streams[i]); + } + set_master_stream(context->streams, context->stream_count); +-- +2.7.4 + |