Documentation/fb/sa1100fb.rst
Source file repositories/reference/linux-study-clean/Documentation/fb/sa1100fb.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/fb/sa1100fb.rst- Extension
.rst- Size
- 1452 bytes
- Lines
- 38
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
=================================================
sa1100fb - SA-1100 LCD graphic framebuffer driver
=================================================
This is a driver for a graphic framebuffer for the SA-1100 LCD
controller.
Configuration
==============
For most common passive displays, giving the option::
video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
on the kernel command line should be enough to configure the
controller. The bits per pixel (bpp) value should be 4, 8, 12, or
16. LCCR values are display-specific and should be computed as
documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel
displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2>
are used for the lower panel.
For active displays or displays requiring additional configuration
(controlling backlights, powering on the LCD, etc.), the command line
options may not be enough to configure the display. Adding sections to
sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
will probably be necessary.
Accepted options::
bpp:<value> Configure for <value> bits per pixel
lccr0:<value> Configure LCD control register 0 (11.7.3)
lccr1:<value> Configure LCD control register 1 (11.7.4)
lccr2:<value> Configure LCD control register 2 (11.7.5)
lccr3:<value> Configure LCD control register 3 (11.7.6)
Mark Huang <mhuang@livetoy.com>Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
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.