30aa4efb57
This patch add the possibility to change the video mode at barebox's runtime if the graphics driver in use supports it. Signed-off-by: <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
#ifndef __FB_H
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#define __FB_H
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#include <ioctl.h>
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#include <param.h>
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#define FB_VISUAL_TRUECOLOR 2 /* True color */
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#define FB_VISUAL_PSEUDOCOLOR 3 /* Pseudo color (like atari) */
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#define FB_VISUAL_DIRECTCOLOR 4 /* Direct color */
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#define FB_VISUAL_STATIC_PSEUDOCOLOR 5 /* Pseudo color readonly */
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#define FB_SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active */
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#define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */
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#define FB_SYNC_EXT 4 /* external sync */
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#define FB_SYNC_COMP_HIGH_ACT 8 /* composite sync high active */
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#define FB_SYNC_BROADCAST 16 /* broadcast video timings */
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/* vtotal = 144d/288n/576i => PAL */
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/* vtotal = 121d/242n/484i => NTSC */
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#define FB_SYNC_ON_GREEN 32 /* sync on green */
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#define FB_VMODE_NONINTERLACED 0 /* non interlaced */
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#define FB_VMODE_INTERLACED 1 /* interlaced */
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#define FB_VMODE_DOUBLE 2 /* double scan */
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#define FB_VMODE_ODD_FLD_FIRST 4 /* interlaced: top line first */
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#define FB_VMODE_MASK 255
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#define FB_VMODE_YWRAP 256 /* ywrap instead of panning */
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#define FB_VMODE_SMOOTH_XPAN 512 /* smooth xpan possible (internally used) */
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#define FB_VMODE_CONUPDATE 512 /* don't update x/yoffset */
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#define PICOS2KHZ(a) (1000000000UL/(a))
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#define KHZ2PICOS(a) (1000000000UL/(a))
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struct fb_videomode {
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const char *name; /* optional */
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u32 refresh; /* optional */
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u32 xres;
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u32 yres;
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u32 pixclock;
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u32 left_margin;
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u32 right_margin;
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u32 upper_margin;
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u32 lower_margin;
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u32 hsync_len;
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u32 vsync_len;
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u32 sync;
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u32 vmode;
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u32 flag;
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};
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/* Interpretation of offset for color fields: All offsets are from the right,
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* inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you
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* can use the offset as right argument to <<). A pixel afterwards is a bit
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* stream and is written to video memory as that unmodified.
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*
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* For pseudocolor: offset and length should be the same for all color
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* components. Offset specifies the position of the least significant bit
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* of the pallette index in a pixel value. Length indicates the number
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* of available palette entries (i.e. # of entries = 1 << length).
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*/
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struct fb_bitfield {
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u32 offset; /* beginning of bitfield */
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u32 length; /* length of bitfield */
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u32 msb_right; /* != 0 : Most significant bit is */
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/* right */
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};
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struct fb_info;
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struct fb_ops {
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/* set color register */
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int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp, struct fb_info *info);
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void (*fb_enable)(struct fb_info *info);
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void (*fb_disable)(struct fb_info *info);
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int (*fb_activate_var)(struct fb_info *info);
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};
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struct fb_info {
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struct fb_videomode *mode;
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struct fb_videomode *mode_list;
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unsigned num_modes;
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struct fb_ops *fbops;
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struct device_d dev; /* This is this fb device */
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void *screen_base;
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void *priv;
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struct cdev cdev;
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u32 xres; /* visible resolution */
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u32 yres;
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u32 bits_per_pixel; /* guess what */
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u32 grayscale; /* != 0 Graylevels instead of colors */
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struct fb_bitfield red; /* bitfield in fb mem if true color, */
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struct fb_bitfield green; /* else only length is significant */
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struct fb_bitfield blue;
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struct fb_bitfield transp; /* transparency */
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int enabled;
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};
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int register_framebuffer(struct fb_info *info);
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#define FBIOGET_SCREENINFO _IOR('F', 1, loff_t)
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#define FBIO_ENABLE _IO('F', 2)
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#define FBIO_DISABLE _IO('F', 3)
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#endif /* __FB_H */
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