[PATCH 19/34] drm/amd/display: Expose dither setting functionality to Linux

[Harry Wentland]

From: "Leo (Sunpeng) Li" <sunpeng...@amd.com>

We will need this to disable dither for CRC capture.

Change-Id: I3ae4fcd86c74b5ab05ad16559d92e156c6f389bc
Signed-off-by: Leo (Sunpeng) Li <sunpeng...@amd.com>
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c   | 31 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/amd/display/dc/dc_stream.h |  3 +++
 2 files changed, 34 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c 
b/drivers/gpu/drm/amd/display/dc/core/dc.c
index a78e0364b1b2..ea5c35166ffa 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -300,6 +300,37 @@ bool dc_stream_get_crc(struct dc *dc, struct 
dc_stream_state *stream,
        return false;
 }
 
+void dc_stream_set_dither_option(struct dc_stream_state *stream,
+               enum dc_dither_option option)
+{
+       struct bit_depth_reduction_params params;
+       struct dc_link *link = stream->status.link;
+       struct pipe_ctx *pipes = NULL;
+       int i;
+
+       for (i = 0; i < MAX_PIPES; i++) {
+               if (link->dc->current_state->res_ctx.pipe_ctx[i].stream ==
+                               stream) {
+                       pipes = &link->dc->current_state->res_ctx.pipe_ctx[i];
+                       break;
+               }
+       }
+
+       memset(&params, 0, sizeof(params));
+       if (!pipes)
+               return;
+       if (option > DITHER_OPTION_MAX)
+               return;
+
+       stream->dither_option = option;
+
+       resource_build_bit_depth_reduction_params(stream,
+                               &params);
+       stream->bit_depth_params = params;
+       pipes->stream_res.opp->funcs->
+               opp_program_bit_depth_reduction(pipes->stream_res.opp, &params);
+}
+
 void dc_stream_set_static_screen_events(struct dc *dc,
                struct dc_stream_state **streams,
                int num_streams,
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h 
b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 2d2472ba97bf..78a2bbe0b272 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -287,6 +287,9 @@ void dc_stream_set_static_screen_events(struct dc *dc,
                                        int num_streams,
                                        const struct dc_static_screen_events 
*events);
 
+void dc_stream_set_dither_option(struct dc_stream_state *stream,
+                                enum dc_dither_option option);
+
 
 bool dc_stream_adjust_vmin_vmax(struct dc *dc,
                                struct dc_stream_state **stream,
-- 
2.14.1

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