packed_pixels_addr_1x1(9)

💅 packed_pixels_addr_1x1(9) 💅

okay bestie, so this is a page from the Kernel API Manual, and it's literally about grabbing a pointer to the block that holds the pixel at whatever coordinates you hand it. cute concept, honestly.

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✨ NAME ✨

packed_pixels_addr_1x1 — get the pointer to the block containing the pixel at the given coordinates 🎯

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🌸 SYNOPSIS 🌸

void packed_pixels_addr_1x1 (const struct vkms_frame_info *frame_info ,
int x , int y , int plane_index , u8 **addr );

that's the whole signature, no notes 💅

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🎀 ARGUMENTS 🎀

• frame_info — buffer metadata, aka the vibe check info about your buffer 🗂️
• x — the x (width) coordinate inside the plane
• y — the y (height) coordinate inside the plane
• plane_index — the index of the plane 👑
• addr — the returned pointer, yes it's a double pointer, yes that's the whole point, she returns by reference 💖

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🦋 DESCRIPTION 🦋

okay so here's the tea: this function can only be used with format where block_h == block_w == 1. like, that's the entire rule. no cap. if your block isn't 1×1, this is not the function for you, bestie 🙈

fr fr, that constraint is the whole personality of this function — don't come at her with your chunky blocks.

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🌈 SEE ALSO 🌈

kernel file ./drivers/gpu/drm/vkms/vkms_formats.c — that's where she lives 🏠

and the whole friend group, all here, all iconic:

• packed_pixels_offset(9)
• packed_pixels_addr(9)
• get_block_step_bytes(9)
• get_subsampling(9)
• get_subsampling_offset(9)
• READ_LINE(9)
• READ_LINE_ARGB8888(9)
• READ_LINE_le16161616(9)
• READ_LINE_YUV_SEMIPLANAR(9)
• vkms_writeback_row(9)
• get_pixel_read_line_function(9)
• swap_uv_columns(9)
• get_conversion_matrix_to_argb_u16(9)
• get_pixel_write_function(9)

periodt. 💅✨

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🫶 that's the page!! sourced straight from ./drivers/gpu/drm/vkms, dated October 2026, and yeah the whole thing is filed under packed_pixels_addr_1x1(9) in case you need to find her again. mwah 💋🎀