mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 03:21:32 +00:00
198fc108ee
PXA27x and later processors support overlay1 and overlay2 on-top of the
base framebuffer (although under-neath the base is also possible). They
support palette and no-palette RGB formats, as well as YUV formats (only
available on overlay2). These overlays have dedicated DMA channels and
behave in a similar way as a framebuffer.
This heavily simplified and re-structured work is based on the original
pxafb_overlay.c (which is pending for mainline merge for a long time).
The major problems with this pxafb_overlay.c are (if you are interested
in the history):
1. heavily redundant (the control logics for overlay1 and overlay2 are
actually identical except for some small operations, which are now
abstracted into a 'pxafb_layer_ops' structure)
2. a lot of useless and un-tested code (two workarounds which are now
fixed on mature silicons)
3. cursorfb is actually useless, hardware cursor should not be used
this way, and the code was actually un-tested for a long time.
The code in this patch should be self-explanatory, I tried to add minimum
comments. As said, this is basically simplified, there are several things
still on the pending list:
1. palette mode is un-supported and un-tested (although re-using the
palette code of the base framebuffer is actually very easy now with
previous clean-up patches)
2. fb_pan_display for overlay(s) is un-supported
3. the base framebuffer can actually be abstracted by 'pxafb_layer' as
well, which will help further re-use of the code and keep a better
and consistent structure. (This is the reason I named it 'pxafb_layer'
instead of 'pxafb_overlay' or something alike)
See Documentation/fb/pxafb.txt for additional usage information.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Eric Miao <ycmiao@ycmiao-hp520.(none)>
200 lines
4.2 KiB
C
200 lines
4.2 KiB
C
#ifndef __PXAFB_H__
|
|
#define __PXAFB_H__
|
|
|
|
/*
|
|
* linux/drivers/video/pxafb.h
|
|
* -- Intel PXA250/210 LCD Controller Frame Buffer Device
|
|
*
|
|
* Copyright (C) 1999 Eric A. Thomas.
|
|
* Copyright (C) 2004 Jean-Frederic Clere.
|
|
* Copyright (C) 2004 Ian Campbell.
|
|
* Copyright (C) 2004 Jeff Lackey.
|
|
* Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas
|
|
* which in turn is
|
|
* Based on acornfb.c Copyright (C) Russell King.
|
|
*
|
|
* 2001-08-03: Cliff Brake <cbrake@acclent.com>
|
|
* - ported SA1100 code to PXA
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
/* PXA LCD DMA descriptor */
|
|
struct pxafb_dma_descriptor {
|
|
unsigned int fdadr;
|
|
unsigned int fsadr;
|
|
unsigned int fidr;
|
|
unsigned int ldcmd;
|
|
};
|
|
|
|
enum {
|
|
PAL_NONE = -1,
|
|
PAL_BASE = 0,
|
|
PAL_OV1 = 1,
|
|
PAL_OV2 = 2,
|
|
PAL_MAX,
|
|
};
|
|
|
|
enum {
|
|
DMA_BASE = 0,
|
|
DMA_UPPER = 0,
|
|
DMA_LOWER = 1,
|
|
DMA_OV1 = 1,
|
|
DMA_OV2_Y = 2,
|
|
DMA_OV2_Cb = 3,
|
|
DMA_OV2_Cr = 4,
|
|
DMA_CURSOR = 5,
|
|
DMA_CMD = 6,
|
|
DMA_MAX,
|
|
};
|
|
|
|
/* maximum palette size - 256 entries, each 4 bytes long */
|
|
#define PALETTE_SIZE (256 * 4)
|
|
#define CMD_BUFF_SIZE (1024 * 50)
|
|
|
|
/* NOTE: the palette and frame dma descriptors are doubled to allow
|
|
* the 2nd set for branch settings (FBRx)
|
|
*/
|
|
struct pxafb_dma_buff {
|
|
unsigned char palette[PAL_MAX * PALETTE_SIZE];
|
|
uint16_t cmd_buff[CMD_BUFF_SIZE];
|
|
struct pxafb_dma_descriptor pal_desc[PAL_MAX * 2];
|
|
struct pxafb_dma_descriptor dma_desc[DMA_MAX * 2];
|
|
};
|
|
|
|
enum {
|
|
OVERLAY1,
|
|
OVERLAY2,
|
|
};
|
|
|
|
enum {
|
|
OVERLAY_FORMAT_RGB = 0,
|
|
OVERLAY_FORMAT_YUV444_PACKED,
|
|
OVERLAY_FORMAT_YUV444_PLANAR,
|
|
OVERLAY_FORMAT_YUV422_PLANAR,
|
|
OVERLAY_FORMAT_YUV420_PLANAR,
|
|
};
|
|
|
|
#define NONSTD_TO_XPOS(x) (((x) >> 0) & 0x3ff)
|
|
#define NONSTD_TO_YPOS(x) (((x) >> 10) & 0x3ff)
|
|
#define NONSTD_TO_PFOR(x) (((x) >> 20) & 0x7)
|
|
|
|
struct pxafb_layer;
|
|
|
|
struct pxafb_layer_ops {
|
|
void (*enable)(struct pxafb_layer *);
|
|
void (*disable)(struct pxafb_layer *);
|
|
void (*setup)(struct pxafb_layer *);
|
|
};
|
|
|
|
struct pxafb_layer {
|
|
struct fb_info fb;
|
|
int id;
|
|
atomic_t usage;
|
|
uint32_t control[2];
|
|
|
|
struct pxafb_layer_ops *ops;
|
|
|
|
void __iomem *video_mem;
|
|
unsigned long video_mem_phys;
|
|
size_t video_mem_size;
|
|
struct completion branch_done;
|
|
|
|
struct pxafb_info *fbi;
|
|
};
|
|
|
|
struct pxafb_info {
|
|
struct fb_info fb;
|
|
struct device *dev;
|
|
struct clk *clk;
|
|
|
|
void __iomem *mmio_base;
|
|
|
|
struct pxafb_dma_buff *dma_buff;
|
|
size_t dma_buff_size;
|
|
dma_addr_t dma_buff_phys;
|
|
dma_addr_t fdadr[DMA_MAX * 2];
|
|
|
|
void __iomem *video_mem; /* virtual address of frame buffer */
|
|
unsigned long video_mem_phys; /* physical address of frame buffer */
|
|
size_t video_mem_size; /* size of the frame buffer */
|
|
u16 * palette_cpu; /* virtual address of palette memory */
|
|
u_int palette_size;
|
|
|
|
u_int lccr0;
|
|
u_int lccr3;
|
|
u_int lccr4;
|
|
u_int cmap_inverse:1,
|
|
cmap_static:1,
|
|
unused:30;
|
|
|
|
u_int reg_lccr0;
|
|
u_int reg_lccr1;
|
|
u_int reg_lccr2;
|
|
u_int reg_lccr3;
|
|
u_int reg_lccr4;
|
|
u_int reg_cmdcr;
|
|
|
|
unsigned long hsync_time;
|
|
|
|
volatile u_char state;
|
|
volatile u_char task_state;
|
|
struct mutex ctrlr_lock;
|
|
wait_queue_head_t ctrlr_wait;
|
|
struct work_struct task;
|
|
|
|
struct completion disable_done;
|
|
|
|
#ifdef CONFIG_FB_PXA_SMARTPANEL
|
|
uint16_t *smart_cmds;
|
|
size_t n_smart_cmds;
|
|
struct completion command_done;
|
|
struct completion refresh_done;
|
|
struct task_struct *smart_thread;
|
|
#endif
|
|
|
|
#ifdef CONFIG_FB_PXA_OVERLAY
|
|
struct pxafb_layer overlay[2];
|
|
#endif
|
|
|
|
#ifdef CONFIG_CPU_FREQ
|
|
struct notifier_block freq_transition;
|
|
struct notifier_block freq_policy;
|
|
#endif
|
|
|
|
void (*lcd_power)(int, struct fb_var_screeninfo *);
|
|
void (*backlight_power)(int);
|
|
};
|
|
|
|
#define TO_INF(ptr,member) container_of(ptr,struct pxafb_info,member)
|
|
|
|
/*
|
|
* These are the actions for set_ctrlr_state
|
|
*/
|
|
#define C_DISABLE (0)
|
|
#define C_ENABLE (1)
|
|
#define C_DISABLE_CLKCHANGE (2)
|
|
#define C_ENABLE_CLKCHANGE (3)
|
|
#define C_REENABLE (4)
|
|
#define C_DISABLE_PM (5)
|
|
#define C_ENABLE_PM (6)
|
|
#define C_STARTUP (7)
|
|
|
|
#define PXA_NAME "PXA"
|
|
|
|
/*
|
|
* Minimum X and Y resolutions
|
|
*/
|
|
#define MIN_XRES 64
|
|
#define MIN_YRES 64
|
|
|
|
/* maximum X and Y resolutions - note these are limits from the register
|
|
* bits length instead of the real ones
|
|
*/
|
|
#define MAX_XRES 1024
|
|
#define MAX_YRES 1024
|
|
|
|
#endif /* __PXAFB_H__ */
|