Commit 3b733278 authored by Reza Amini's avatar Reza Amini Committed by Alex Deucher
Browse files

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: default avatarReza Amini <Reza.Amini@amd.com>
Reviewed-by: default avatarAnthony Koo <Anthony.Koo@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d4c2a96f

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

+35 −8
Original line number Diff line number Diff line
@@ -951,7 +951,7 @@ 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)
@@ -959,6 +959,38 @@ 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;
@@ -972,6 +1004,8 @@ 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);
@@ -1002,13 +1036,6 @@ 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 */

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