Commit f7938bc0 authored by Reza Amini's avatar Reza Amini Committed by Alex Deucher
Browse files

drm/amd/display: Implement DAL3 GPU Integer Scaling 



[WHY]
Users want to not have filtering when scaling by integer
multiples to native timing.

[HOW]
If timing is a multiple integer of view, we set number of taps
to 1 (effectivly closest neighbour).

Signed-off-by: default avatarReza Amini <Reza.Amini@amd.com>
Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Acked-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent f1cdc98f

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

+16 −0
Original line number Diff line number Diff line
@@ -940,7 +940,14 @@ 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)

{

	if (dest.width  >= src.width  && dest.width  % src.width  == 0 &&

		dest.height >= src.height && dest.height % src.height == 0)

		return true;



	return false;

}

bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)

{

	const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
@@ -983,6 +990,15 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx) 
	if (pipe_ctx->plane_res.dpp != NULL)

		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 */

		pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_24BPP;

drivers/gpu/drm/amd/display/dc/dc_hw_types.h

+1 −0
Original line number Diff line number Diff line
@@ -614,6 +614,7 @@ struct scaling_taps { 
	uint32_t h_taps;

	uint32_t v_taps_c;

	uint32_t h_taps_c;

	bool integer_scaling;

};



enum dc_timing_standard {

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