ufs_qcom_dou...apt_l0l1l2l3(9)

💅 ufs_qcom_double_t_adapt_l0l1l2l3(9) — Kernel API Manual 🦋

okay so bestie, welcome to the ufs_qcom_dou...apt_l0l1l2l3(9) page 💖 this is a kernel API manual and honestly it's giving "niche M-PHY math but make it fashion." sit down, grab a strawberry drink 🍓, and let's get into it.

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✨ NAME ✨

ufs_qcom_double_t_adapt_l0l1l2l3 — literally makes a brand new adapt that doubles the adaptation duration TADAPT_L0_L1_L2_L3, and it derives that new one from the old adapt. no cap. 🫶

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🌸 SYNOPSIS 🌸

u32 ufs_qcom_double_t_adapt_l0l1l2l3 (u32 old_adapt );

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🎀 ARGUMENTS 🎀

• old_adapt — the original ADAPT_L0_L1_L2_L3 capability. this is the "before" picture, the starting point, the pre-glow-up era 💅

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🔥 DESCRIPTION 🔥

so here's the ADAPT_length_L0_L1_L2_L3 formula straight from the M-PHY spec, and yes it's exactly this, don't @ me:

if (ADAPT_range_L0_L1_L2_L3 == COARSE) { ADAPT_length_L0_L1_L2_L3 = [0, 12]
ADAPT_L0_L1_L2_L3 = 215 x 2^ADAPT_length_L0_L1_L2_L3 } else if
(ADAPT_range_L0_L1_L2_L3 == FINE) { ADAPT_length_L0_L1_L2_L3 = [0, 127]
TADAPT_L0_L1_L2_L3 = 215 x (ADAPT_length_L0_L1_L2_L3 + 1) }

okay and now, to actually double the adaptation duration TADAPT_L0_L1_L2_L3, it's a two-step situation 👑

1. If the adapt range is COARSE (1'b1), new adapt = old adapt + 1. simple. iconic. no notes. ✨
2. If the adapt range is FINE (1'b0), it splits into two vibes:
   • a) If the old adapt length is < 64, then (new adapt + 1) = 2 * (old adapt + 1). math is mathing 💖
   • b) If the old adapt length is >= 64, set new adapt to 0x88 using COARSE range — because the new adapt you'd get from the equation in a) shall exceed 127 😭 so yeah, we pivot. main character pivot energy.

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🌈 EXAMPLES 🌈

ADAPT_range_L0_L1_L2_L3 | ADAPT_length_L0_L1_L2_L3 | TADAPT_L0_L1_L2_L3
(PAM-4 UI) 0                       3                       131072 0
7                       262144 0                       63
2097152 0                       64                      2129920 0
127                     4194304 1                       8
8388608 1                       9                       16777216 1
10                      33554432 1                       11
67108864 1                       12                      134217728

(that's the table, verbatim, exactly as delivered — do not reformat, she's perfect as she is 🎀)

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⭐ RETURN ⭐

new adapt. that's it. that's the return. 🫡

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💀 SEE ALSO 💀

Kernel file ./drivers/ufs/host/ufs-qcom.c 👀

then the whole friend group:

• ufs_qcom_config_ice_allocator(9)
• ufs_qcom_cfg_timers(9)
• ufs_qcom_advertise_quirks(9)
• ufs_qcom_setup_clocks(9)
• ufs_qcom_init(9)
• ufs_qcom_set_clk_40ns_cycles(9)
• ufs_qcom_device_reset(9)
• ufs_qcom_fw_managed_device_reset(9)
• ufs_qcom_probe(9)
• ufs_qcom_remove(9)

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aaaand that's the page!! 🧚 from ./drivers/ufs/host, dated October 2026, answering to the name ufs_qcom_dou...apt_l0l1l2l3(9). go double that adapt duration bestie, you got this 💜🌸✨