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From 9512f38631a80c41fad301c2a9bd58fe45b35798 Mon Sep 17 00:00:00 2001
From: Reza Amini <Reza.Amini@amd.com>
Date: Mon, 30 Sep 2019 10:11:24 -0400
Subject: [PATCH 4259/4736] drm/amd/display: Add center mode for integer
scaling in DC
[why]
We want to use maximum space on display to show source
[how]
For Centered Mode: Replicate source as many times as possible to use
maximum of display active space add borders.
Signed-off-by: Reza Amini <Reza.Amini@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
.../gpu/drm/amd/display/dc/core/dc_resource.c | 43 +++++++++++++++----
1 file changed, 35 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 4154f1eedece..e8b16b4acacc 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -948,7 +948,7 @@ static void calculate_inits_and_adj_vp(struct pipe_ctx *pipe_ctx)
data->inits.v_c_bot = dc_fixpt_add(data->inits.v_c, data->ratios.vert_c);
}
-static bool are_rect_integer_multiples(struct rect src, struct rect dest)
+static bool are_rects_integer_multiples(struct rect src, struct rect dest)
{
if (dest.width >= src.width && dest.width % src.width == 0 &&
dest.height >= src.height && dest.height % src.height == 0)
@@ -956,6 +956,38 @@ static bool are_rect_integer_multiples(struct rect src, struct rect dest)
return false;
}
+
+void calculate_integer_scaling(struct pipe_ctx *pipe_ctx)
+{
+ if (!pipe_ctx->plane_state->scaling_quality.integer_scaling)
+ return;
+
+ //for Centered Mode
+ if (pipe_ctx->stream->dst.width == pipe_ctx->stream->src.width &&
+ pipe_ctx->stream->dst.height == pipe_ctx->stream->src.height) {
+ // calculate maximum # of replication of src onto addressable
+ unsigned int integer_multiple = min(
+ pipe_ctx->stream->timing.h_addressable / pipe_ctx->stream->src.width,
+ pipe_ctx->stream->timing.v_addressable / pipe_ctx->stream->src.height);
+
+ //scale dst
+ pipe_ctx->stream->dst.width = integer_multiple * pipe_ctx->stream->src.width;
+ pipe_ctx->stream->dst.height = integer_multiple * pipe_ctx->stream->src.height;
+
+ //center dst onto addressable
+ pipe_ctx->stream->dst.x = (pipe_ctx->stream->timing.h_addressable - pipe_ctx->stream->dst.width)/2;
+ pipe_ctx->stream->dst.y = (pipe_ctx->stream->timing.v_addressable - pipe_ctx->stream->dst.height)/2;
+ }
+
+ //disable taps if src & dst are integer ratio
+ if (are_rects_integer_multiples(pipe_ctx->stream->src, pipe_ctx->stream->dst)) {
+ pipe_ctx->plane_state->scaling_quality.v_taps = 1;
+ pipe_ctx->plane_state->scaling_quality.h_taps = 1;
+ pipe_ctx->plane_state->scaling_quality.v_taps_c = 1;
+ pipe_ctx->plane_state->scaling_quality.h_taps_c = 1;
+ }
+}
+
bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
{
const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
@@ -969,6 +1001,8 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
pipe_ctx->plane_res.scl_data.format = convert_pixel_format_to_dalsurface(
pipe_ctx->plane_state->format);
+ calculate_integer_scaling(pipe_ctx);
+
calculate_scaling_ratios(pipe_ctx);
calculate_viewport(pipe_ctx);
@@ -999,13 +1033,6 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
res = pipe_ctx->plane_res.dpp->funcs->dpp_get_optimal_number_of_taps(
pipe_ctx->plane_res.dpp, &pipe_ctx->plane_res.scl_data, &plane_state->scaling_quality);
- if (res &&
- plane_state->scaling_quality.integer_scaling &&
- are_rect_integer_multiples(pipe_ctx->plane_res.scl_data.viewport,
- pipe_ctx->plane_res.scl_data.recout)) {
- pipe_ctx->plane_res.scl_data.taps.v_taps = 1;
- pipe_ctx->plane_res.scl_data.taps.h_taps = 1;
- }
if (!res) {
/* Try 24 bpp linebuffer */
--
2.17.1
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