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fbdev: Add FOURCC-based format configuration API

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This API will be used to support YUV frame buffer formats in a standard
way.

Last but not least, create a much needed fbdev API documentation and
document the format setting APIs.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This commit is contained in:
Laurent Pinchart 2011-12-13 14:02:26 +01:00 • committed by Florian Tobias Schandinat
parent b779505282
commit fb21c2f428
3 changed files with 330 additions and 4 deletions
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14
include/linux/fb.h
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@ -45,6 +45,7 @@
#define FB_TYPE_INTERLEAVED_PLANES 2 /* Interleaved planes */
#define FB_TYPE_TEXT 3 /* Text/attributes */
#define FB_TYPE_VGA_PLANES 4 /* EGA/VGA planes */
#define FB_TYPE_FOURCC 5 /* Type identified by a V4L2 FOURCC */
#define FB_AUX_TEXT_MDA 0 /* Monochrome text */
#define FB_AUX_TEXT_CGA 1 /* CGA/EGA/VGA Color text */
@ -69,6 +70,7 @@
#define FB_VISUAL_PSEUDOCOLOR 3 /* Pseudo color (like atari) */
#define FB_VISUAL_DIRECTCOLOR 4 /* Direct color */
#define FB_VISUAL_STATIC_PSEUDOCOLOR 5 /* Pseudo color readonly */
#define FB_VISUAL_FOURCC 6 /* Visual identified by a V4L2 FOURCC */
#define FB_ACCEL_NONE 0 /* no hardware accelerator */
#define FB_ACCEL_ATARIBLITT 1 /* Atari Blitter */
@ -154,6 +156,8 @@
#define FB_ACCEL_PUV3_UNIGFX 0xa0 /* PKUnity-v3 Unigfx */
#define FB_CAP_FOURCC 1 /* Device supports FOURCC-based formats */
struct fb_fix_screeninfo {
char id[16]; /* identification string eg "TT Builtin" */
unsigned long smem_start; /* Start of frame buffer mem */
@ -171,7 +175,8 @@ struct fb_fix_screeninfo {
__u32 mmio_len; /* Length of Memory Mapped I/O */
__u32 accel; /* Indicate to driver which */
/* specific chip/card we have */
__u16 reserved[3]; /* Reserved for future compatibility */
__u16 capabilities; /* see FB_CAP_* */
__u16 reserved[2]; /* Reserved for future compatibility */
};
/* Interpretation of offset for color fields: All offsets are from the right,
@ -246,8 +251,8 @@ struct fb_var_screeninfo {
__u32 yoffset; /* resolution */
__u32 bits_per_pixel; /* guess what */
__u32 grayscale; /* != 0 Graylevels instead of colors */
__u32 grayscale; /* 0 = color, 1 = grayscale, */
/* >1 = FOURCC */
struct fb_bitfield red; /* bitfield in fb mem if true color, */
struct fb_bitfield green; /* else only length is significant */
struct fb_bitfield blue;
@ -273,7 +278,8 @@ struct fb_var_screeninfo {
__u32 sync; /* see FB_SYNC_* */
__u32 vmode; /* see FB_VMODE_* */
__u32 rotate; /* angle we rotate counter clockwise */
__u32 reserved[5]; /* Reserved for future compatibility */
__u32 colorspace; /* colorspace for FOURCC-based modes */
__u32 reserved[4]; /* Reserved for future compatibility */
};
struct fb_cmap {