From dc326f61c51df641fbf4f42303e860f53ea163c1 Mon Sep 17 00:00:00 2001 From: Jaehyun Chung Date: Tue, 11 Feb 2020 11:19:41 -0500 Subject: [PATCH] drm/amd/display: Monitor patch to delay setting ignore MSA bit [Why] Some displays clear ignore MSA bit on mode change, which cause blackscreen when programming variable vtotals. Ignore MSA bit needs programming needs to be delayed or re-set to be retained. [How] Create patch to delay programming ignore MSA bit after unblanking stream. Signed-off-by: Jaehyun Chung Reviewed-by: Aric Cyr Acked-by: Anthony Koo Acked-by: Rodrigo Siqueira Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 +++ drivers/gpu/drm/amd/display/dc/dc_types.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index a3bfa05c545e..3420d098d771 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -3095,6 +3095,9 @@ void core_link_enable_stream( dc->hwss.unblank_stream(pipe_ctx, &pipe_ctx->stream->link->cur_link_settings); + if (stream->link->local_sink->edid_caps.panel_patch.delay_ignore_msa > 0) + msleep(stream->link->local_sink->edid_caps.panel_patch.delay_ignore_msa); + if (dc_is_dp_signal(pipe_ctx->stream->signal)) enable_stream_features(pipe_ctx); #if defined(CONFIG_DRM_AMD_DC_HDCP) diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h index 1490732a4b44..299f6e00f576 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -230,6 +230,7 @@ struct dc_panel_patch { unsigned int extra_delay_backlight_off; unsigned int extra_t7_ms; unsigned int skip_scdc_overwrite; + unsigned int delay_ignore_msa; }; struct dc_edid_caps { -- 2.11.0