[PATCH 13/16] drm/amd/display: Program dithering if requested

[sunpeng.li at amd.com]

From: SivapiriyanKumarasamy <sivapiriyan.kumarasamy at amd.com>

Dithering needs to be enabled or disabled as requested. If
dc_stream_update->dither_option is non-null, program the FMT blocks.

Signed-off-by: SivapiriyanKumarasamy <sivapiriyan.kumarasamy at amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo at amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac at amd.com>
Acked-by: Leo Li <sunpeng.li at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c   | 8 ++++++++
 drivers/gpu/drm/amd/display/dc/dc_stream.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index dffd083..ad67b98 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1483,6 +1483,14 @@ static void commit_planes_do_stream_update(struct dc *dc,
 			if (stream_update->output_csc_transform)
 				dc_stream_program_csc_matrix(dc, stream);
 
+			if (stream_update->dither_option) {
+				resource_build_bit_depth_reduction_params(pipe_ctx->stream,
+									&pipe_ctx->stream->bit_depth_params);
+				pipe_ctx->stream_res.opp->funcs->opp_program_fmt(pipe_ctx->stream_res.opp,
+						&stream->bit_depth_params,
+						&stream->clamping);
+			}
+
 			/* Full fe update*/
 			if (update_type == UPDATE_TYPE_FAST)
 				continue;
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 0c42418..be34d63 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -136,6 +136,7 @@ struct dc_stream_update {
 
 	struct colorspace_transform *gamut_remap;
 	enum dc_color_space *output_color_space;
+	enum dc_dither_option *dither_option;
 
 	struct dc_csc_transform *output_csc_transform;
 
-- 
2.7.4