drivers/video/fbdev/pxafb.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/pxafb.c

Extension

.c

Size

65731 bytes

Lines

2441

Domain

Driver Families

Bucket

drivers/video

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/moduleparam.h
• linux/kernel.h
• linux/sched.h
• linux/errno.h
• linux/string.h
• linux/interrupt.h
• linux/slab.h
• linux/mm.h
• linux/fb.h
• linux/delay.h
• linux/init.h
• linux/ioport.h
• linux/cpufreq.h
• linux/platform_device.h
• linux/dma-mapping.h
• linux/clk.h
• linux/err.h
• linux/completion.h
• linux/mutex.h
• linux/kthread.h
• linux/freezer.h
• linux/console.h
• linux/of_graph.h
• linux/regulator/consumer.h
• linux/soc/pxa/cpu.h
• video/of_display_timing.h
• video/videomode.h
• linux/string_choices.h
• asm/io.h
• asm/irq.h
• asm/div64.h

Detected Declarations

• function lcd_readl
• function lcd_writel
• function pxafb_schedule_work
• function chan_to_field
• function pxafb_setpalettereg
• function pxafb_setcolreg
• function var_to_depth
• function pxafb_var_to_bpp
• function pxafb_var_to_lccr3
• function pxafb_set_pixfmt
• function pxafb_display_dma_period
• function pxafb_setmode
• function pxafb_adjust_timing
• function pxafb_check_var
• function pxafb_set_par
• function pxafb_pan_display
• function pxafb_blank
• function overlay1fb_setup
• function FDADRx
• function overlay1fb_disable
• function overlay2fb_setup
• function overlay2fb_enable
• function overlay2fb_disable
• function overlayfb_open
• function overlayfb_release
• function overlayfb_check_var
• function overlayfb_check_video_memory
• function overlayfb_set_par
• function init_pxafb_overlay
• function pxafb_overlay_supported
• function pxafb_overlay_map_video_memory
• function pxafb_overlay_init
• function pxafb_overlay_exit
• function pxafb_overlay_init
• function set_hsync_time
• function setup_frame_dma
• function setup_base_frame
• function setup_smart_dma
• function pxafb_smart_flush
• function pxafb_smart_queue
• function __smart_timing
• function setup_smart_timing
• function pxafb_smart_thread
• function pxafb_smart_init
• function pxafb_smart_init
• function setup_parallel_timing
• function pxafb_activate_var
• function __pxafb_backlight_power

Annotated Snippet

module_init(pxafb_init);
module_exit(pxafb_exit);

MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/moduleparam.h`, `linux/kernel.h`, `linux/sched.h`, `linux/errno.h`, `linux/string.h`, `linux/interrupt.h`, `linux/slab.h`.
• Detected declarations: `function lcd_readl`, `function lcd_writel`, `function pxafb_schedule_work`, `function chan_to_field`, `function pxafb_setpalettereg`, `function pxafb_setcolreg`, `function var_to_depth`, `function pxafb_var_to_bpp`, `function pxafb_var_to_lccr3`, `function pxafb_set_pixfmt`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.