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drm/amd/display: truncate scaling ratios and inits to 19 bit precision

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Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dmytro Laktyushkin 2018-04-18 14:19:23 -04:00 committed by Alex Deucher
parent ab9c2062d9
commit 0002d3ac8a
1 changed files with 17 additions and 8 deletions
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25
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
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@ -652,6 +652,14 @@ static void calculate_scaling_ratios(struct pipe_ctx *pipe_ctx)
pipe_ctx->plane_res.scl_data.ratios.horz_c.value /= 2;
pipe_ctx->plane_res.scl_data.ratios.vert_c.value /= 2;
}
pipe_ctx->plane_res.scl_data.ratios.horz = dc_fixpt_truncate(
pipe_ctx->plane_res.scl_data.ratios.horz, 19);
pipe_ctx->plane_res.scl_data.ratios.vert = dc_fixpt_truncate(
pipe_ctx->plane_res.scl_data.ratios.vert, 19);
pipe_ctx->plane_res.scl_data.ratios.horz_c = dc_fixpt_truncate(
pipe_ctx->plane_res.scl_data.ratios.horz_c, 19);
pipe_ctx->plane_res.scl_data.ratios.vert_c = dc_fixpt_truncate(
pipe_ctx->plane_res.scl_data.ratios.vert_c, 19);
}
static void calculate_inits_and_adj_vp(struct pipe_ctx *pipe_ctx, struct view *recout_skip)
@ -688,17 +696,18 @@ static void calculate_inits_and_adj_vp(struct pipe_ctx *pipe_ctx, struct view *r
* init_bot = init + scaling_ratio
* init_c = init + truncated_vp_c_offset(from calculate viewport)
*/
data->inits.h = dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.horz, data->taps.h_taps + 1), 2);
data->inits.h = dc_fixpt_truncate(dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.horz, data->taps.h_taps + 1), 2), 19);
data->inits.h_c = dc_fixpt_add(data->inits.h_c, dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.horz_c, data->taps.h_taps_c + 1), 2));
data->inits.h_c = dc_fixpt_truncate(dc_fixpt_add(data->inits.h_c, dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.horz_c, data->taps.h_taps_c + 1), 2)), 19);
data->inits.v = dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.vert, data->taps.v_taps + 1), 2);
data->inits.v = dc_fixpt_truncate(dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.vert, data->taps.v_taps + 1), 2), 19);
data->inits.v_c = dc_fixpt_truncate(dc_fixpt_add(data->inits.v_c, dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.vert_c, data->taps.v_taps_c + 1), 2)), 19);
data->inits.v_c = dc_fixpt_add(data->inits.v_c, dc_fixpt_div_int(
dc_fixpt_add_int(data->ratios.vert_c, data->taps.v_taps_c + 1), 2));
/* Adjust for viewport end clip-off */