From: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
To: Harendra Gautam <harendra.gautam@oss.qualcomm.com>,
Srinivas Kandagatla <srini@kernel.org>
Cc: Mark Brown <broonie@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
linux-sound@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>,
Sarath Ganapathiraju <sarath.ganapathiraju@oss.qualcomm.com>,
Kumar Anurag Singh <kumar.singh@oss.qualcomm.com>
Subject: Re: [PATCH v3 1/9] ASoC: dt-bindings: qcom,qaif-cpu: Add binding
Date: Wed, 26 Aug 2026 14:01:52 +0530 [thread overview]
Message-ID: <bf6e42b4-ff21-4b6c-a7d5-024e5b9a7da4@oss.qualcomm.com> (raw)
In-Reply-To: <20260824063627.3595610-2-harendra.gautam@oss.qualcomm.com>
On 8/24/2026 12:06 PM, Harendra Gautam wrote:
> QAIF routes audio between system memory, external PCM/TDM/MI2S serial
> interfaces and the internal Bolero/WCD codec. Platform Devicetree files
> need a binding to describe the controller resources, DAI cells and per-
> interface AIF configuration, and named constants to avoid raw numeric IDs
> in sound-dai references and child-node reg values.
>
> Describe the MMIO region, interrupt, clocks, DMA IOMMU mapping and
> aif-interface child nodes required by the controller.
>
> Signed-off-by: Harendra Gautam <harendra.gautam@oss.qualcomm.com>
> ---
> .../bindings/sound/qcom,qaif-cpu.yaml | 307 ++++++++++++++++++
> include/dt-bindings/sound/qcom,qaif.h | 97 ++++++
> 2 files changed, 404 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/qcom,qaif-cpu.yaml
> create mode 100644 include/dt-bindings/sound/qcom,qaif.h
>
> diff --git a/Documentation/devicetree/bindings/sound/qcom,qaif-cpu.yaml b/Documentation/devicetree/bindings/sound/qcom,qaif-cpu.yaml
> new file mode 100644
> index 000000000000..134356114733
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/qcom,qaif-cpu.yaml
> @@ -0,0 +1,307 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/qcom,qaif-cpu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Audio Interface (QAIF) CPU DAI Controller
> +
> +maintainers:
> + - Harendra Gautam <harendra.gautam@oss.qualcomm.com>
> +
> +description: |
> + The Qualcomm Audio Interface (QAIF) is a fully configurable DMA-based
> + audio subsystem controller. It serialises and deserialises PCM audio
> + between system memory and external serial audio peripherals (PCM, TDM,
> + I2S, MI2S) through the AIF path, and transfers parallel audio between
> + memory and an internal WCD codec through the CIF path.
> +
> + AIF (Audio Interface): up to 13 multi-lane Unified Audio Interfaces,
> + each supporting up to 8 independent data lanes. Each lane is individually
> + configurable as TX (output/speaker) or RX (input/mic). All lanes of an
> + interface share a single bit clock and frame sync. Supported modes are
> + PCM (short/long sync), TDM, and MI2S (stereo/mono). Per-interface
> + configuration includes sync source (master/slave), sync mode, sync delay,
> + sync inversion, slot width (8/16/24/32-bit), sample width, active slot
> + masks (up to 32 slots), bits-per-lane frame size, lane enable/direction
> + masks, loopback, output-enable control, and full-cycle path support for
> + long chip-to-chip connections.
> +
> + CIF (Codec Interface): up to 10 RDDMA (playback) and 10 WRDMA (capture)
> + channels connecting to an internal codec over a parallel bus. Each channel
> + supports active-channel enable mask (up to 16 channels), frame-sync
> + selection, frame-sync delay, frame-sync output gating, dynamic clock
> + gating, and 16-bit packing/unpacking.
> +
> + Note on RX/TX naming convention: in QAIF, TX refers to the output
> + (speaker/playback) direction and RX refers to the input (mic/capture)
> + direction. This applies to both AIF lane directions and CIF slot/mask
> + properties.
> +
> + DMA engine: RDDMA fetches audio from DDR/TCM/LPM into a shared SRAM
> + latency buffer (SHRAM) and drains it to the interface. WRDMA collects
> + data from the interface into SHRAM and writes it to memory. Each DMA
> + owns a private SHRAM region defined by start address and length registers.
> + Burst sizes of 1/2/4/8/16 beats (64-bit) are supported with up to 4
> + outstanding transactions per DMA. Two QSB master ports (QXM0 for TCM,
> + QXM1 for DDR/LPM) provide the memory interface.
> +
> + Resources are partitioned among up to 5 Execution Engines (EEs) via
> + EE map registers. Each EE owns a set of DMAs, audio interfaces, and
> + interface groups, and receives its own independent interrupt output.
> + The interrupt hierarchy has a two-level structure: a summary register
> + identifies the event class (DMA period, underflow/overflow, error
> + response, audio interface underflow/overflow, group done, rate detector,
> + VFR), and per-resource status registers identify the specific channel.
> +
> + Interface grouping (bonding) allows up to 6 groups of audio and codec
> + interfaces to start synchronously and align their DMA period interrupts
> + within half a frame duration using the RDDMA padding feature.
> +
> + Two rate detector blocks measure the frequency of incoming frame sync or
> + word select signals and generate interrupts on rate change, undetected
> + rate, or sync timeout.
> +
> + Block diagram::
> +
> + System Memory (DDR / LPM / TCM)
> + +---------------------------------+
> + | Circular Buffers (ping-pong) |
> + +----------+----------+-----------+
> + | ^
> + 64-bit AXI 64-bit AXI
> + | |
> + +----------v----------+-----------+
> + | QSB Master Ports |
> + | +----------+ +----------+ |
> + | | QXM0 | | QXM1 | |
> + | +----+-----+ +-----+----+ |
> + +-------|--------------|----------+
> + | |
> + +-------v--------------v----------+
> + | Shared RAM (SHRAM) |
> + | +------------+ +------------+ |
> + | | QXM0 Read | | QXM0 Write | |
> + | | SHRAM | | SHRAM | |
> + | +------------+ +------------+ |
> + | +------------+ +------------+ |
> + | | QXM1 Read | | QXM1 Write | |
> + | | SHRAM | | SHRAM | |
> + | +------------+ +------------+ |
> + +---+--------+--------+-------+---+
> + | | | |
> + +---v--+ +--v---+ +--v---+ +-v----+
> + |RDDMA | |RDDMA | |WRDMA | |WRDMA |
> + | AIF | | CIF | | AIF | | CIF |
> + |[0..n]| |[0..n]| |[0..n]| |[0..n]|
> + +--+---+ +--+---+ +--+---+ +-+----+
> + | | ^ ^
> + | TX | TX | RX | RX
> + v v | |
> + +--+--------------------+ +----+----------+
> + | Unified Audio Intf | | Codec DMA |
> + | (AIF 0..12) | | Interface |
> + | | | (CIF) |
> + | AUD_INTFa block: | | |
> + | - Serializer (TX) | | RDDMA: DDR -> |
> + | - De-serializer (RX) | | internal |
> + | - Sync gen/detect | | codec |
> + | - Up to 8 data lanes | | WRDMA: codec |
> + | - PCM / TDM / MI2S | | -> DDR |
> + | - Near Pad Logic | | Up to 16 ch |
> + +--+--------------------+ +----+----------+
> + | Lane 0..7 (TX/RX) | Parallel bus
> + | Bit clk + Frame sync | + Frame sync
> + v v
> + +--+--------+ +------+------+
> + | External | | Internal |
> + | Serial | | Digital |
> + | Peripherals| | Codec |
> + | (PCM/TDM/ | | (Bolero/ |
> + | MI2S) | | WCD) |
> + +-----------+ +-------------+
> +
> +allOf:
> + - $ref: dai-common.yaml#
> +
> +properties:
> + compatible:
> + const: qcom,shikra-qaif-cpu
> +
> + reg:
> + maxItems: 1
> + description: QAIF core registers
> +
> + interrupts:
> + maxItems: 1
> + description:
> + QAIF summary interrupt for this Execution Engine. Signals DMA period
> + completion, buffer underflow/overflow, error response, audio interface
> + underflow/overflow, interface-group done, rate detector and VFR events.
> +
> + iommus:
> + maxItems: 1
> + description: Phandle to apps_smmu node with sid mask
> +
> + dma-coherent: true
> +
> + clocks:
> + minItems: 5
> + maxItems: 9
> +
> + clock-names:
> + description:
> + The first five clocks are always required. Any further entries are the
> + per-AIF bit clocks (aif_if<N>_ibit), supplied in order starting from
> + AIF interface 0 for as many serial AIF interfaces as the board uses.
> + minItems: 5
> + items:
> + - const: lpass_config
> + - const: lpass_core_axim
> + - const: aud_dma
> + - const: aud_dma_mem
> + - const: bus
> + - const: aif_if0_ibit
> + - const: aif_if1_ibit
> + - const: aif_if2_ibit
> + - const: aif_if3_ibit
> +
> + '#sound-dai-cells':
> + const: 1
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> +patternProperties:
> + '^aif@[0-9a-f]+$':
> + type: object
> + description:
> + QAIF AIF interface child node for PCM, TDM or MI2S configuration.
> +
> + properties:
> + reg:
> + maxItems: 1
> + description:
> + DAI ID of the AIF interface (QAIF_MI2S_AIF* or QAIF_TDM_AIF*).
> +
> + dai-format:
> + description: Serial audio interface format (MI2S, TDM or PCM).
> + enum: [i2s, dsp_a, dsp_b]
> +
> + dai-tdm-slot-width:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum: [8, 16, 24, 32]
> + description:
> + Slot width in bits.
> +
> + dai-tdm-slot-num:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Number of slots per lane.
> + minimum: 1
> + maximum: 32
> +
> + dai-tdm-slot-rx-mask:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description:
> + Active RX slots, one entry per slot. A nonzero value marks the
> + slot as active.
> + minItems: 1
> + maxItems: 32
> +
> + dai-tdm-slot-tx-mask:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description:
> + Active TX slots, one entry per slot. A nonzero value marks the
> + slot as active.
> + minItems: 1
> + maxItems: 32
> +
> + qcom,qaif-aif-lane-map:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description:
> + Per-lane direction map, one entry per lane starting from lane 0.
> + Use 0 for TX (output/speaker) and 1 for RX (input/mic).
> + minItems: 1
> + maxItems: 8
> + items:
> + enum: [0, 1]
> +
> + required:
> + - reg
> + - dai-format
> + - qcom,qaif-aif-lane-map
> +
> + if:
> + properties:
> + dai-format:
> + enum: [dsp_a, dsp_b]
> + then:
> + required:
> + - dai-tdm-slot-width
> + - dai-tdm-slot-num
> + - dai-tdm-slot-rx-mask
> + - dai-tdm-slot-tx-mask
> +
> + additionalProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - iommus
> + - clocks
> + - clock-names
> + - '#sound-dai-cells'
> + - '#address-cells'
> + - '#size-cells'
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + qaif_cpu: audio-controller@a000000 {
> + compatible = "qcom,shikra-qaif-cpu";
> + reg = <0x0 0x0a000000 0x0 0x20000>;
> + interrupts = <0 331 4>;
> + iommus = <&apps_smmu 0x1c0 0x0>;
> + clocks = <&gcc 213>,
> + <&gcc 214>,
> + <&audiocorecc 15>,
> + <&audiocorecc 17>,
> + <&audiocorecc 18>,
> + <&audiocorecc 5>,
> + <&audiocorecc 8>,
> + <&audiocorecc 11>,
> + <&audiocorecc 14>;
> + clock-names = "lpass_config",
> + "lpass_core_axim",
> + "aud_dma",
> + "aud_dma_mem",
> + "bus",
> + "aif_if0_ibit",
> + "aif_if1_ibit",
> + "aif_if2_ibit",
> + "aif_if3_ibit";
> + #sound-dai-cells = <1>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + aif@d7 {
> + reg = <215>;
> + dai-format = "dsp_a";
> + dai-tdm-slot-width = <32>;
> + dai-tdm-slot-num = <2>;
> + dai-tdm-slot-rx-mask = <1 1>;
> + dai-tdm-slot-tx-mask = <1 1>;
> + qcom,qaif-aif-lane-map = <1 0>;
> + };
> + };
> + };
> diff --git a/include/dt-bindings/sound/qcom,qaif.h b/include/dt-bindings/sound/qcom,qaif.h
> new file mode 100644
> index 000000000000..24706efd07d1
> --- /dev/null
> +++ b/include/dt-bindings/sound/qcom,qaif.h
> @@ -0,0 +1,97 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> +/*
> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> + *
> + * DAI IDs for the Qualcomm Audio Interface (QAIF) controller.
> + * QAIF_MI2S_AIF* and QAIF_TDM_AIF* values are used in sound-dai
> + * references and as the reg value of aif@N child nodes.
> + * QAIF_CDC_DMA_* values are for sound-dai references only and must
> + * not be used as aif@N child node reg values.
> + */
> +#ifndef __DT_QCOM_QAIF_H
> +#define __DT_QCOM_QAIF_H
> +
> +/*
> + * MI2S DAI IDs -- one per physical AIF port in MI2S mode.
> + * Each port supports up to 2 channels (stereo I2S) over a single
> + * data lane sharing a bit clock and frame sync.
> + */
> +#define QAIF_MI2S_AIF0 200
> +#define QAIF_MI2S_AIF1 201
> +#define QAIF_MI2S_AIF2 202
> +#define QAIF_MI2S_AIF3 203
> +#define QAIF_MI2S_AIF4 204
> +#define QAIF_MI2S_AIF5 205
> +#define QAIF_MI2S_AIF6 206
> +#define QAIF_MI2S_AIF7 207
> +#define QAIF_MI2S_AIF8 208
> +#define QAIF_MI2S_AIF9 209
> +#define QAIF_MI2S_AIF10 210
> +#define QAIF_MI2S_AIF11 211
> +#define QAIF_MI2S_AIF12 212
> +
> +/*
> + * TDM DAI IDs -- one per physical AIF port in TDM mode.
> + * Each port supports up to 8 channels over up to 8 independent data
> + * lanes sharing a single bit clock and frame sync.
> + */
> +#define QAIF_TDM_AIF0 213
> +#define QAIF_TDM_AIF1 214
> +#define QAIF_TDM_AIF2 215
> +#define QAIF_TDM_AIF3 216
> +#define QAIF_TDM_AIF4 217
> +#define QAIF_TDM_AIF5 218
> +#define QAIF_TDM_AIF6 219
> +#define QAIF_TDM_AIF7 220
> +#define QAIF_TDM_AIF8 221
> +#define QAIF_TDM_AIF9 222
> +#define QAIF_TDM_AIF10 223
> +#define QAIF_TDM_AIF11 224
> +#define QAIF_TDM_AIF12 225
> +
> +/*
> + * CIF (Codec Interface) RX DAI IDs -- playback to internal codec.
> + * RDDMA channels fetch audio from memory and drain it to the codec.
> + */
> +#define QAIF_CDC_DMA_RX0 226
> +#define QAIF_CDC_DMA_RX1 227
> +#define QAIF_CDC_DMA_RX2 228
> +#define QAIF_CDC_DMA_RX3 229
> +#define QAIF_CDC_DMA_RX4 230
> +#define QAIF_CDC_DMA_RX5 231
> +#define QAIF_CDC_DMA_RX6 232
> +#define QAIF_CDC_DMA_RX7 233
> +#define QAIF_CDC_DMA_RX8 234
> +#define QAIF_CDC_DMA_RX9 235
> +
> +/*
> + * CIF (Codec Interface) TX DAI IDs -- capture from internal codec.
> + * WRDMA channels collect audio from the codec and write it to memory.
> + */
> +#define QAIF_CDC_DMA_TX0 236
> +#define QAIF_CDC_DMA_TX1 237
> +#define QAIF_CDC_DMA_TX2 238
> +#define QAIF_CDC_DMA_TX3 239
> +#define QAIF_CDC_DMA_TX4 240
> +#define QAIF_CDC_DMA_TX5 241
> +#define QAIF_CDC_DMA_TX6 242
> +#define QAIF_CDC_DMA_TX7 243
> +#define QAIF_CDC_DMA_TX8 244
> +#define QAIF_CDC_DMA_TX9 245
> +
> +/*
> + * CIF (Codec Interface) VA TX DAI IDs -- capture from voice activity codec.
> + * WRDMA channels collect audio from the VA codec and write it to memory.
> + */
> +#define QAIF_CDC_DMA_VA_TX0 246
> +#define QAIF_CDC_DMA_VA_TX1 247
> +#define QAIF_CDC_DMA_VA_TX2 248
> +#define QAIF_CDC_DMA_VA_TX3 249
> +#define QAIF_CDC_DMA_VA_TX4 250
> +#define QAIF_CDC_DMA_VA_TX5 251
> +#define QAIF_CDC_DMA_VA_TX6 252
> +#define QAIF_CDC_DMA_VA_TX7 253
> +#define QAIF_CDC_DMA_VA_TX8 254
> +#define QAIF_CDC_DMA_VA_TX9 255
> +
These DAI IDs exceed the LPASS_MAX_PORT limit, which will cause sound
card registration to fail.
Check sound/soc/qcom/common.c, as the current indices (246-255) are
beyond the supported LPASS port range.
Best Regards,
Rafi.
> +#endif /* __DT_QCOM_QAIF_H */
next prev parent reply other threads:[~2026-08-26 8:32 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-24 6:36 [PATCH v3 0/9] ASoC: qcom: Add QAIF driver for Shikra audio platform Harendra Gautam
2026-08-24 6:36 ` [PATCH v3 1/9] ASoC: dt-bindings: qcom,qaif-cpu: Add binding Harendra Gautam
2026-08-24 6:46 ` sashiko-bot
2026-08-24 8:39 ` Manuel Ebner
2026-08-24 9:14 ` Harendra Gautam
2026-08-25 5:59 ` Krzysztof Kozlowski
2026-08-26 8:31 ` Mohammad Rafi Shaik [this message]
2026-08-26 9:39 ` Harendra Gautam
2026-08-26 9:43 ` Srinivas Kandagatla
2026-08-26 9:55 ` Harendra Gautam
2026-08-26 10:01 ` Srinivas Kandagatla
2026-08-26 10:06 ` Harendra Gautam
2026-08-26 10:25 ` Harendra Gautam
2026-08-28 8:58 ` Harendra Gautam
2026-08-28 12:37 ` Srinivas Kandagatla
2026-08-28 12:42 ` Srinivas Kandagatla
2026-08-29 9:10 ` Harendra Gautam
2026-09-01 5:11 ` Prasad Kumpatla
2026-09-01 7:57 ` Harendra Gautam
2026-08-26 23:32 ` Mark Brown
2026-08-27 4:00 ` Harendra Gautam
2026-09-01 6:14 ` Prasad Kumpatla
2026-09-01 8:06 ` Harendra Gautam
2026-09-01 11:59 ` Krzysztof Kozlowski
2026-09-01 14:46 ` Harendra Gautam
2026-09-01 14:56 ` Krzysztof Kozlowski
2026-09-01 16:31 ` Harendra Gautam
2026-08-24 6:36 ` [PATCH v3 2/9] ASoC: qcom: Add QAIF shared data structures and variant interface Harendra Gautam
2026-08-24 6:36 ` [PATCH v3 3/9] ASoC: qcom: Add QAIF hardware register map Harendra Gautam
2026-08-24 6:48 ` sashiko-bot
2026-08-24 6:36 ` [PATCH v3 4/9] ASoC: qcom: Add QAIF CPU DAI ops, regmap, DT parsing and platform init Harendra Gautam
2026-08-24 6:49 ` sashiko-bot
2026-08-24 6:36 ` [PATCH v3 5/9] ASoC: soc-core: Add snd_soc_of_xlate_dai_name() generic helper Harendra Gautam
2026-08-25 4:20 ` Kuninori Morimoto
2026-08-24 6:36 ` [PATCH v3 6/9] ASoC: qcom: Add QAIF PCM operations Harendra Gautam
2026-08-24 6:53 ` sashiko-bot
2026-08-24 9:25 ` Markus Elfring
2026-08-24 10:10 ` Harendra Gautam
2026-08-25 6:07 ` Krzysztof Kozlowski
2026-08-24 6:36 ` [PATCH v3 7/9] ASoC: qcom: Add QAIF IRQ handling, suspend/resume and platform register Harendra Gautam
2026-08-24 6:53 ` sashiko-bot
2026-08-24 6:36 ` [PATCH v3 8/9] ASoC: qcom: Add Shikra QAIF support Harendra Gautam
2026-08-26 8:35 ` Mohammad Rafi Shaik
2026-08-26 8:58 ` Harendra Gautam
2026-08-26 10:13 ` Srinivas Kandagatla
2026-08-26 10:37 ` Harendra Gautam
2026-08-24 6:36 ` [PATCH v3 9/9] MAINTAINERS: Add Qualcomm QAIF driver entry Harendra Gautam
2026-08-24 8:22 ` Abel Vesa
2026-08-24 8:31 ` Harendra Gautam
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