mipi_dbi_command_read(9)

💖 mipi_dbi_command_read(9) 💖

okay bestie, so this is a page from the Kernel API Manual — yes, that Kernel API Manual — and it's all about mipi_dbi_command_read, aka the little function that asks your MIPI display controller a question and actually listens for the answer. let's get into it 🫶

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✨ NAME ✨

mipi_dbi_command_read — the MIPI DCS read command, literally the one that reads stuff back instead of just yelling at the hardware 💅

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🌸 SYNOPSIS 🌸

int mipi_dbi_command_read (struct mipi_dbi *dbi , u8 cmd , u8 *val );

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🎀 ARGUMENTS 🎀

• dbi — the MIPI DBI structure, your whole vibe-coded display context, she's the main character here 👑
• cmd — the Command, like the actual instruction you're sending over 🦋
• val — the Value read, that's where the answer lands ✨

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💀 DESCRIPTION 💀

Send a MIPI DCS read command to the controller. that's it, that's the whole thing — you send the read command, the controller gets it, no cap 🧚

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🌈 RETURN 🌈

Zero on success 😌, negative error code on failure 😭 — so like, check your return values bestie, fr fr.

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/gpu/drm/drm_mipi_dbi.c overview(9) — start here if you're nosy, iykyk 💜
• mipi_dbi_command_buf(9)
• mipi_dbi_buf_copy(9)
• drm_mipi_dbi_crtc_helper_mode_valid(9)
• drm_mipi_dbi_plane_helper_atomic_check(9)
• drm_mipi_dbi_plane_helper_atomic_update(9)
• drm_mipi_dbi_crtc_helper_atomic_check(9)
• drm_mipi_dbi_crtc_helper_atomic_disable(9)
• drm_mipi_dbi_connector_helper_get_modes(9)
• drm_mipi_dbi_dev_init(9)
• mipi_dbi_hw_reset(9)
• mipi_dbi_display_is_on(9)
• mipi_dbi_poweron_reset(9)
• mipi_dbi_poweron_conditional_reset(9)
• mipi_dbi_spi_cmd_max_speed(9)
• mipi_dbi_spi_init(9)
• mipi_dbi_spi_transfer(9)
• mipi_dbi_debugfs_init(9)

that's the whole friend group, go say hi to all of them 🍓

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okay and one last thing — this whole page lives under ./drivers/gpu/drm, dated October 2026, and yes it's still wearing the mipi_dbi_command_read(9) name tag at the door. slay, era, periodt 💖🔥

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