Tools: Topology: Build topology with 2-way speaker crossover

src/audio/eq_iir/tune/sof_example_lr4.m

@@ -0,0 +1,183 @@
+% sof_example_lr4 - Design 4th order Linkwitz–Riley filter bank
+%
+% This script is run without arguments. It creates IIR equalizer
+% blobs for crossover filter bank for 2-way speaker and four
+% channels stream. The exported configurations are Linkwitz-Riley
+% 4th order with crossover frequency at 2 kHz. The filters are
+% in order:
+% - low, high, low, high
+% - low, low, high, high
+% - high, high, low, low
+%
+
+% SPDX-License-Identifier: BSD-3-Clause
+%
+% Copyright (c) 2025, Intel Corporation.
+%
+% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
+
+function sof_example_lr4()
+
+%% Common definitions
+fs = 48e3;
+fc = 2e3;
+sof_tools = '../../../../tools';
+tpath = fullfile(sof_tools, 'topology/topology2/include/components/eqiir');
+cpath = fullfile(sof_tools, 'ctl/ipc4/eq_iir');
+
+sof_eq_paths(1);
+
+%% --------------------------------------------------
+%% Example: Band-split 2ch to 4ch low and high bands
+%% --------------------------------------------------
+design_name = sprintf('xover_lr4_%dhz_lhlh_%dkhz', fc, round(fs/1000));
+blob_fn = fullfile(cpath, [design_name '.bin']);
+alsa_fn = fullfile(cpath, [design_name '.txt']);
+tplg_fn = fullfile(tpath, [design_name '.conf']);
+comment = 'LR4 filter bank coefficients';
+howto = 'cd src/audio/eq_iir/tune; octave sof_example_lr4.m';
+
+% Design low-pass and high-pass filters
+eq_lo = lo_band_iir(fs, fc);
+eq_hi = hi_band_iir(fs, fc);
+
+% Quantize and pack filter coefficients plus shifts etc.
+bq_lo = sof_eq_iir_blob_quant(eq_lo.p_z, eq_lo.p_p, eq_lo.p_k);
+bq_hi = sof_eq_iir_blob_quant(eq_hi.p_z, eq_hi.p_p, eq_hi.p_k);
+
+% Build blob
+channels_in_config = 4;      % Setup max 4 channels EQ
+assign_response = [0 1 0 1]; % Order: lo, hi, lo, hi
+num_responses = 2;           % Two responses: lo, hi
+bm = sof_eq_iir_blob_merge(channels_in_config, ...
+		       num_responses, ...
+		       assign_response, ...
+		       [bq_lo bq_hi]);
+
+% Pack and write file
+sof_eq_pack_export(bm, blob_fn, alsa_fn, tplg_fn, comment, howto)
+
+%% --------------------------------------------------
+%% Example: Same but filters order is lo, lo, hi, hi
+%% --------------------------------------------------
+
+design_name = sprintf('xover_lr4_%dhz_llhh_%dkhz', fc, round(fs/1000));
+blob_fn = fullfile(cpath, [design_name '.bin']);
+alsa_fn = fullfile(cpath, [design_name '.txt']);
+tplg_fn = fullfile(tpath, [design_name '.conf']);
+
+assign_response = [0 0 1 1];
+num_responses = 2;
+bm = sof_eq_iir_blob_merge(channels_in_config, ...
+		       num_responses, ...
+		       assign_response, ...
+		       [bq_lo bq_hi]);
+
+% Pack and write file
+sof_eq_pack_export(bm, blob_fn, alsa_fn, tplg_fn, comment, howto)
+
+%% --------------------------------------------------
+%% Example: Same but filters order is hi, hi, lo, lo
+%% --------------------------------------------------
+
+design_name = sprintf('xover_lr4_%dhz_hhll_%dkhz', fc, round(fs/1000));
+blob_fn = fullfile(cpath, [design_name '.bin']);
+alsa_fn = fullfile(cpath, [design_name '.txt']);
+tplg_fn = fullfile(tpath, [design_name '.conf']);
+
+assign_response = [1 1 0 0];
+num_responses = 2;
+bm = sof_eq_iir_blob_merge(channels_in_config, ...
+		       num_responses, ...
+		       assign_response, ...
+		       [bq_lo bq_hi]);
+
+% Pack and write file
+sof_eq_pack_export(bm, blob_fn, alsa_fn, tplg_fn, comment, howto)
+
+%% ------------------------------------
+%% Done.
+%% ------------------------------------
+
+sof_eq_paths(0);
+end
+
+%% -------------------
+%% EQ design functions
+%% -------------------
+
+function eq = lo_band_iir(fs, fc)
+
+
+%% Get defaults for equalizer design
+eq = sof_eq_defaults();
+eq.fs = fs;
+eq.enable_iir = 1;
+eq.iir_norm_type = 'peak';
+eq.iir_norm_offs_db = 0;
+
+% Parametric EQs are PEQ_HP1, PEQ_HP2, PEQ_LP1, PEQ_LP2, PEQ_LS1,
+% PEQ_LS2, PEQ_HS1, PEQ_HS2 = 8, PEQ_PN2, PEQ_LP4, and  PEQ_HP4.
+%
+% Parametric EQs take as second argument the cutoff frequency in Hz
+% and as second argument a dB value (can use 0 for LP2). The
+% Third argument is a Q-value (can use 0 for LP2).
+
+% Two 2nd order butterworth low-pass filters for 4th order Linkwitz–Riley
+eq.peq = [ ...
+                 eq.PEQ_LP2 fc 0 0 ; ...
+                 eq.PEQ_LP2 fc 0 0 ; ...
+         ];
+
+%% Design EQ
+eq = sof_eq_compute(eq);
+
+%% Plot
+sof_eq_plot(eq);
+
+end
+
+function eq = hi_band_iir(fs, fc)
+
+
+%% Get defaults for equalizer design
+eq = sof_eq_defaults();
+eq.fs = fs;
+eq.enable_iir = 1;
+eq.iir_norm_type = 'peak';
+eq.iir_norm_offs_db = 0;
+
+% Two 2nd order high-pass filters for 4th order Linkwitz–Riley
+eq.peq = [ ...
+                 eq.PEQ_HP2 fc 0 0 ; ...
+                 eq.PEQ_HP2 fc 0 0 ; ...
+         ];
+
+%% Design EQ
+eq = sof_eq_compute(eq);
+
+%% Plot
+sof_eq_plot(eq);
+
+end
+
+
+
+% Pack and write file common function for all exports
+function sof_eq_pack_export(bm, bin_fn, ascii_fn, tplg_fn, note, howto)
+
+bp = sof_eq_iir_blob_pack(bm, 4); % IPC4
+
+if ~isempty(bin_fn)
+	sof_ucm_blob_write(bin_fn, bp);
+end
+
+if ~isempty(ascii_fn)
+	sof_alsactl_write(ascii_fn, bp);
+end
+
+if ~isempty(tplg_fn)
+	sof_tplg2_write(tplg_fn, bp, 'IIR', note, howto);
+end
+
+end

src/audio/selector/tune/sof_selector_blobs.m

@@ -1,4 +1,13 @@
-% Export configuration blobs for Selector
+% sof_selector_blobs - export configuration blobs for Selector
+%
+% This script is run without arguments. It exports a number of
+% configuration blobs for selector/micsel component. The first
+% category of blobs are for upmix and downmix between mono to
+% 7.1 channel audio formats.
+%
+% The second category is for duplicating stereo to four channels
+% for 2-way speaker crossover filter.
+%
 
 % SPDX-License-Identifier: BSD-3-Clause
 %
@@ -97,6 +106,39 @@ function sof_selector_blobs()
 	write_blob(sel, "upmix_stereo_to_51");
 	write_blob(sel, "upmix_stereo_to_71");
 
+	% Stereo to L,L,R,R
+	sel.coeffs = [ 1 0 0 0 0 0 0 0 ; ...
+		       1 0 0 0 0 0 0 0 ; ...
+		       0 1 0 0 0 0 0 0 ; ...
+		       0 1 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ];
+	write_blob(sel, "xover_selector_lr_to_llrr");
+
+	% Stereo to R,R,L,L
+	sel.coeffs = [ 0 1 0 0 0 0 0 0 ; ...
+		       0 1 0 0 0 0 0 0 ; ...
+		       1 0 0 0 0 0 0 0 ; ...
+		       1 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ];
+	write_blob(sel, "xover_selector_lr_to_rrll");
+
+	% Stereo to L,R,L,R
+	sel.coeffs = [ 1 0 0 0 0 0 0 0 ; ...
+		       0 1 0 0 0 0 0 0 ; ...
+		       1 0 0 0 0 0 0 0 ; ...
+		       0 1 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ; ...
+		       0 0 0 0 0 0 0 0 ];
+	write_blob(sel, "xover_selector_lr_to_lrlr");
+
 	sof_selector_paths(false);
 end
 

tools/topology/topology2/cavs-sdw.conf

@@ -13,7 +13,9 @@
 <virtual.conf>
 <host-copier-gain-mixin-playback.conf>
 <mixout-gain-alh-dai-copier-playback.conf>
+<mixout-gain-micsel-eqiir-eqfir-alh-dai-copier-playback.conf>
 <mixout-gain-eqiir-eqfir-drc-alh-dai-copier-playback.conf>
+<mixout-gain-eqiir-eqfir-drc-micsel-eqiir-eqfir-alh-dai-copier-playback.conf>
 <dai-copier-gain-eqiir-module-copier-capture.conf>
 <gain-capture.conf>
 <gain-copier-capture.conf>
@@ -92,6 +94,11 @@ Define {
 	EFX_MIC_TDFB_PARAMS "line2_generic_pm10deg"
 	EFX_MIC_DRC_PARAMS "dmic_default"
 	DMIC0_DAI_EQIIR "highpass_40hz_20db"
+	SDW_AMP_NUM_CHANNELS 2
+	SDW_AMP_XOVER false
+	SDW_AMP_XOVER_SELECTOR_PARAMS default
+	SDW_AMP_XOVER_EQIIR_PARAMS default
+	SDW_AMP_XOVER_EQFIR_PARAMS default
 }
 
 # override defaults with platform-specific config
@@ -119,8 +126,17 @@ IncludeByKey.NUM_HDMIS {
 "[3-4]" "platform/intel/hdmi-generic.conf"
 }
 
-IncludeByKey.NUM_SDW_AMP_LINKS {
-"[1-3]" "platform/intel/sdw-amp-generic.conf"
+IncludeByKey.SDW_AMP_XOVER {
+	"false" {
+			IncludeByKey.NUM_SDW_AMP_LINKS {
+				"[1-3]" "platform/intel/sdw-amp-generic.conf"
+		}
+	}
+	"true" {
+			IncludeByKey.NUM_SDW_AMP_LINKS {
+				"[1-3]" "platform/intel/sdw-amp-xover.conf"
+		}
+	}
 }
 
 IncludeByKey.SDW_DMIC {

tools/topology/topology2/include/components/eqiir/xover_lr4_2000hz_hhll_48khz.conf

@@ -0,0 +1,35 @@
+# LR4 filter bank coefficients 08-Sep-2025
+# cd src/audio/eq_iir/tune; octave sof_example_lr4.m
+Object.Base.data."IIR" {
+	bytes "
+		0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
+		0xcc,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0xcc,0x00,0x00,0x00,0x04,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,
+		0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x2d,0x3a,0xcd,0xd3,
+		0xc0,0xf5,0x82,0x68,0xb9,0x41,0x76,0x00,
+		0x72,0x83,0xec,0x00,0xb9,0x41,0x76,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
+		0x2d,0x3a,0xcd,0xd3,0xc0,0xf5,0x82,0x68,
+		0xb9,0x41,0x76,0x00,0x72,0x83,0xec,0x00,
+		0xb9,0x41,0x76,0x00,0xff,0xff,0xff,0xff,
+		0x65,0x7f,0x00,0x00,0x02,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x7e,0x70,0xdd,0xd6,
+		0xc0,0xf5,0x82,0x68,0xb6,0x9e,0x44,0x1a,
+		0x94,0xc2,0x76,0xcb,0xb6,0x9e,0x44,0x1a,
+		0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
+		0x7e,0x70,0xdd,0xd6,0xc0,0xf5,0x82,0x68,
+		0xb6,0x9e,0x44,0x1a,0x94,0xc2,0x76,0xcb,
+		0xb6,0x9e,0x44,0x1a,0xfe,0xff,0xff,0xff,
+		0x92,0x41,0x00,0x00"
+}

tools/topology/topology2/include/components/eqiir/xover_lr4_2000hz_lhlh_48khz.conf

@@ -0,0 +1,35 @@
+# LR4 filter bank coefficients 08-Sep-2025
+# cd src/audio/eq_iir/tune; octave sof_example_lr4.m
+Object.Base.data."IIR" {
+	bytes "
+		0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
+		0xcc,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0xcc,0x00,0x00,0x00,0x04,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x2d,0x3a,0xcd,0xd3,
+		0xc0,0xf5,0x82,0x68,0xb9,0x41,0x76,0x00,
+		0x72,0x83,0xec,0x00,0xb9,0x41,0x76,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
+		0x2d,0x3a,0xcd,0xd3,0xc0,0xf5,0x82,0x68,
+		0xb9,0x41,0x76,0x00,0x72,0x83,0xec,0x00,
+		0xb9,0x41,0x76,0x00,0xff,0xff,0xff,0xff,
+		0x65,0x7f,0x00,0x00,0x02,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x7e,0x70,0xdd,0xd6,
+		0xc0,0xf5,0x82,0x68,0xb6,0x9e,0x44,0x1a,
+		0x94,0xc2,0x76,0xcb,0xb6,0x9e,0x44,0x1a,
+		0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
+		0x7e,0x70,0xdd,0xd6,0xc0,0xf5,0x82,0x68,
+		0xb6,0x9e,0x44,0x1a,0x94,0xc2,0x76,0xcb,
+		0xb6,0x9e,0x44,0x1a,0xfe,0xff,0xff,0xff,
+		0x92,0x41,0x00,0x00"
+}

tools/topology/topology2/include/components/eqiir/xover_lr4_2000hz_llhh_48khz.conf

@@ -0,0 +1,35 @@
+# LR4 filter bank coefficients 08-Sep-2025
+# cd src/audio/eq_iir/tune; octave sof_example_lr4.m
+Object.Base.data."IIR" {
+	bytes "
+		0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
+		0xcc,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0xcc,0x00,0x00,0x00,0x04,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,
+		0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x2d,0x3a,0xcd,0xd3,
+		0xc0,0xf5,0x82,0x68,0xb9,0x41,0x76,0x00,
+		0x72,0x83,0xec,0x00,0xb9,0x41,0x76,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
+		0x2d,0x3a,0xcd,0xd3,0xc0,0xf5,0x82,0x68,
+		0xb9,0x41,0x76,0x00,0x72,0x83,0xec,0x00,
+		0xb9,0x41,0x76,0x00,0xff,0xff,0xff,0xff,
+		0x65,0x7f,0x00,0x00,0x02,0x00,0x00,0x00,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x7e,0x70,0xdd,0xd6,
+		0xc0,0xf5,0x82,0x68,0xb6,0x9e,0x44,0x1a,
+		0x94,0xc2,0x76,0xcb,0xb6,0x9e,0x44,0x1a,
+		0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
+		0x7e,0x70,0xdd,0xd6,0xc0,0xf5,0x82,0x68,
+		0xb6,0x9e,0x44,0x1a,0x94,0xc2,0x76,0xcb,
+		0xb6,0x9e,0x44,0x1a,0xfe,0xff,0xff,0xff,
+		0x92,0x41,0x00,0x00"
+}