zynqmp_dp_phy_ready(9)

💅 zynqmp_dp_phy_ready — a kernel API manual moment

okay so bestie, welcome to the Kernel API Manual ✨ and today's main character is zynqmp_dp_phy_ready(9), like, the little function that could 💖

✨ NAME ✨

zynqmp_dp_phy_ready — the vibe check for your PHY. literally just: is the PHY ready or not 🫶

🌸 SYNOPSIS 🌸

int zynqmp_dp_phy_ready (struct zynqmp_dp *dp );

bestie it returns an int and it takes exactly one (1) argument, we love a low-maintenance icon 💅

🎀 ARGUMENTS 🎀

• dp — the DisplayPort IP core structure. yes that's it. that's the whole argument list. iconic behaviour 👑

🦋 DESCRIPTION 🦋

so what does it do? it checks if the PHY is ready 🔥

but ngl, it's not just a one-and-done peek — if the PHY is not ready, it waits 1ms and checks again, and it does that up to 100 times 😭 like it's not giving up on you, it's giving "I'll wait 🥺" energy.

and before you come for the loop, the amount of delay was suggested by the IP designer — so it's canon, fr fr, that's the official word 🌈

💀 RETURN 💀

• 0 — PHY is ready, slay, we're so back 💖
• -ENODEV — PHY is not ready, and honestly? not the vibe 🙈

⭐ SEE ALSO ⭐

the whole friend group 🫶 starting with the kernel file ./drivers/gpu/drm/xlnx/zynqmp_dp.c:

• struct zynqmp_dp_link_config(9)
• struct zynqmp_dp_mode(9)
• struct zynqmp_dp_config(9)
• enum test_pattern(9)
• struct zynqmp_dp_test(9)
• struct zynqmp_dp_train_set_priv(9)
• struct zynqmp_dp(9)
• zynqmp_dp_phy_init(9)
• zynqmp_dp_phy_exit(9)
• zynqmp_dp_phy_probe(9)
• zynqmp_dp_max_rate(9)
• zynqmp_dp_mode_configure(9)
• zynqmp_dp_adjust_train(9)
• zynqmp_dp_update_vs_emph(9)
• zynqmp_dp_link_train_cr(9)
• zynqmp_dp_link_train_ce(9)
• zynqmp_dp_setup(9)
• zynqmp_dp_train(9)
• zynqmp_dp_train_loop(9)
• zynqmp_dp_aux_cmd_submit(9)
• zynqmp_dp_aux_init(9)
• zynqmp_dp_aux_cleanup(9)
• zynqmp_dp_update_misc(9)
• zynqmp_dp_set_format(9)
• zynqmp_dp_encoder_mode_set_transfer_unit(9)
• zynqmp_dp_encoder_mode_set_stream(9)
• zynqmp_dp_disp_connected_live_layer(9)
• zynqmp_dp_set_test_pattern(9)
• zynqmp_dp_enable_vblank(9)
• zynqmp_dp_disable_vblank(9)

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and that's the page bestie 🎀 one last thing before you go — this lil masterpiece lives in the source dir ./drivers/gpu/drm/xlnx, it's dated October 2026, and the page itself is zynqmp_dp_phy_ready(9). no cap, go forth and check those PHYs 💜✨