packed_pixels_addr(9)

💅 packed_pixels_addr — Kernel API Manual (section 9, bestie)

okay so this is packed_pixels_addr from the Kernel API Manual, section 9, and we're gonna get through it together, no cap 💖

✨ NAME ✨

packed_pixels_addr — the function that hands you the pointer to the block containing the pixel at the coordinates you asked for 🎯

✨ SYNOPSIS ✨

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

🎀 ARGUMENTS 🎀

• frame_info — the buffer metadata, like the vibe check for your whole buffer 🫶
• x — the x (width) coordinate inside the plane
• y — the y (height) coordinate inside the plane
• plane_index — which plane we're on, the index of it 👑
• addr — the returned pointer, this is where the answer lands ✨
• rem_x — the returned X coordinate of the requested pixel in the block
• rem_y — the returned Y coordinate of the requested pixel in the block

🌸 DESCRIPTION 🌸

So it takes everything stored in the frame_info, plus a pair of coordinates, and it returns two things: the address of the block that contains this pixel, and the pixel's position inside that block. literally two-for-one, we love a multitasker 💅

For the deets on how rem_x/rem_y actually behave, go check packed_pixels_offset — it's giving "read that one next" 📖

🦋 SEE ALSO 🦋

Kernel file ./drivers/gpu/drm/vkms/vkms_formats.c — that's the one, the source file, iykyk 🗂️

• packed_pixels_offset(9)
• get_block_step_bytes(9)
• packed_pixels_addr_1x1(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)

and that's the whole page, bestie, you ate that 🍓 this lil masterpiece lives in ./drivers/gpu/drm/vkms, dated October 2026, and it is, of course, packed_pixels_addr(9) — mwah 💋✨