vkms_writeback_row(9)

💅 vkms_writeback_row(9) 💅

okay so bestie, this page is straight out of the Kernel API Manual, and it’s all about one tiny-but-iconic kernel function. no cap. 🫶

✨ NAME ✨

vkms_writeback_row — the generic loop for all supported writeback format. It is executed just after the blending to write a line in the writeback buffer. periodt 💖

🌸 SYNOPSIS 🌸

void vkms_writeback_row (struct vkms_writeback_job *wb , const struct line_buffer *src_buffer , int y );

that’s the signature, character for character — don’t come for me if you retype it wrong lol 😭

🎀 ARGUMENTS 🎀

• wb — the job where the final image gets inserted 👑
• src_buffer — the line to write ✨
• y — the row to write in the writeback buffer 🎯

🦋 SEE ALSO 🦋

• Kernel file: ./drivers/gpu/drm/vkms/vkms_formats.c
• packed_pixels_offset(9)
• packed_pixels_addr(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)
• get_pixel_read_line_function(9)
• swap_uv_columns(9)
• get_conversion_matrix_to_argb_u16(9)
• get_pixel_write_function(9)

okay bye bestie, with love from the ./drivers/gpu/drm/vkms source/version, dated October 2026 — mwah 💋💖