STRUCT SDW_AMD_RES(9)

✨ NAME ✨

struct sdw_amd_res — the SoundWire AMD global resource struct, bestie. That's the vibe. It's typically populated by the DSP driver/Legacy driver, so you're not really the one filling it in — you're the one reading it. Think of it as the group chat's pinned message of everything SoundWire-AMD-related 🎀

(this is from struct sdw_amd_res(9), the kernel API manual, okurrr)

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🌸 SYNOPSIS 🌸

struct sdw_amd_res {
    u32 acp_rev;
    u32 addr;
    u32 reg_range;
    u32 link_mask;
    int count;
    void __iomem *mmio_base;
    acpi_handle handle;
    struct device *parent;
    struct device *dev;
    struct mutex *acp_lock;
 };

literally the whole struct, no edits, no cuts, we keep it 💯

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💅 Members 💅

okay so here's the cast of characters, one by one, no skips:

• acp_rev — the acp pci device revision id 🫶
• addr — the acp pci device resource start address, iykyk
• reg_range — the ACP register range
• link_mask — a bit-wise mask listing the links selected by the DSP driver/legacy driver. bit-wise!! it's a mask!! 👑
• count — the link count, that's it, that's the whole member
• mmio_base — the mmio base of the SoundWire registers 🌈
• handle — the ACPI parent handle
• parent — the parent device (yes, a whole separate member from dev, don't get it twisted 🙈)
• dev — the device implementing hwparams and free callbacks ✨
• acp_lock — a mutex protecting acp common registers access. mutual exclusion, keeping the common registers safe from chaos fr fr 🔥

⚠️ bestie. acp_lock exists for a reason. it's a mutex guarding access to the acp common registers. don't go reading/writing those registers behind its back, okay? that's the whole point of it being a member.

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🦋 SEE ALSO 🦋

the kernel file lives at ./include/linux/soundwire/sdw_amd.h — that's your first stop 🧚

and it's giving friend-group, because you should also go meet:

• struct sdw_amd_dai_runtime(9)
• struct amd_sdw_manager(9)
• struct sdw_amd_acpi_info(9)
• struct sdw_amd_ctx(9)

all of them cross-referenced, all of them iconic 💜

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okay that's the whole page, mwah 💋 sign-off time: this absolute banger comes to you from ./include/linux/soundwire, dated October 2026, and it's officially struct sdw_amd_res(9) — slay, periodt 🎀💖