// SPDX-License-Identifier: GPL-2.0 or MIT
/*
* Copyright ( C ) 2016 Noralf Tr ø nnes
*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; either version 2 of the License , or
* ( at your option ) any later version .
*/
#include <linux/export.h>
#include <linux/io.h>
#include <linux/iosys-map.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <drm/drm_device.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_print.h>
#include <drm/drm_rect.h>
#include "drm_format_internal.h"
/**
* drm_format_conv_state_init - Initialize format - conversion state
* @ state : The state to initialize
*
* Clears all fields in struct drm_format_conv_state . The state will
* be empty with no preallocated resources .
*/
void drm_format_conv_state_init(struct drm_format_conv_state *state)
{
state->tmp.mem = NULL;
state->tmp.size = 0 ;
state->tmp.preallocated = false ;
}
EXPORT_SYMBOL(drm_format_conv_state_init);
/**
* drm_format_conv_state_copy - Copy format - conversion state
* @ state : Destination state
* @ old_state : Source state
*
* Copies format - conversion state from @ old_state to @ state ; except for
* temporary storage .
*/
void drm_format_conv_state_copy(struct drm_format_conv_state *state,
const struct drm_format_conv_state *old_state)
{
/*
* So far , there ' s only temporary storage here , which we don ' t
* duplicate . Just clear the fields .
*/
state->tmp.mem = NULL;
state->tmp.size = 0 ;
state->tmp.preallocated = false ;
}
EXPORT_SYMBOL(drm_format_conv_state_copy);
/**
* drm_format_conv_state_reserve - Allocates storage for format conversion
* @ state : The format - conversion state
* @ new_size : The minimum allocation size
* @ flags : Flags for kmalloc ( )
*
* Allocates at least @ new_size bytes and returns a pointer to the memory
* range . After calling this function , previously returned memory blocks
* are invalid . It ' s best to collect all memory requirements of a format
* conversion and call this function once to allocate the range .
*
* Returns :
* A pointer to the allocated memory range , or NULL otherwise .
*/
void *drm_format_conv_state_reserve(struct drm_format_conv_state *state,
size_t new_size, gfp_t flags)
{
void *mem;
if (new_size <= state->tmp.size)
goto out;
else if (state->tmp.preallocated)
return NULL;
mem = krealloc(state->tmp.mem, new_size, flags);
if (!mem)
return NULL;
state->tmp.mem = mem;
state->tmp.size = new_size;
out:
return state->tmp.mem;
}
EXPORT_SYMBOL(drm_format_conv_state_reserve);
/**
* drm_format_conv_state_release - Releases an format - conversion storage
* @ state : The format - conversion state
*
* Releases the memory range references by the format - conversion state .
* After this call , all pointers to the memory are invalid . Prefer
* drm_format_conv_state_init ( ) for cleaning up and unloading a driver .
*/
void drm_format_conv_state_release(struct drm_format_conv_state *state)
{
if (state->tmp.preallocated)
return ;
kfree(state->tmp.mem);
state->tmp.mem = NULL;
state->tmp.size = 0 ;
}
EXPORT_SYMBOL(drm_format_conv_state_release);
static unsigned int clip_offset(const struct drm_rect *clip, unsigned int pitch, unsigned int cpp)
{
return clip->y1 * pitch + clip->x1 * cpp;
}
/**
* drm_fb_clip_offset - Returns the clipping rectangles byte - offset in a framebuffer
* @ pitch : Framebuffer line pitch in byte
* @ format : Framebuffer format
* @ clip : Clip rectangle
*
* Returns :
* The byte offset of the clip rectangle ' s top - left corner within the framebuffer .
*/
unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format,
const struct drm_rect *clip)
{
return clip_offset(clip, pitch, format->cpp[0 ]);
}
EXPORT_SYMBOL(drm_fb_clip_offset);
/* TODO: Make this function work with multi-plane formats. */
static int __drm_fb_xfrm(void *dst, unsigned long dst_pitch, unsigned long dst_pixsize,
const void *vaddr, const struct drm_framebuffer *fb,
const struct drm_rect *clip, bool vaddr_cached_hint,
struct drm_format_conv_state *state,
void (*xfrm_line)(void *dbuf, const void *sbuf, unsigned int npixels))
{
unsigned long linepixels = drm_rect_width(clip);
unsigned long lines = drm_rect_height(clip);
size_t sbuf_len = linepixels * fb->format->cpp[0 ];
void *stmp = NULL;
unsigned long i;
const void *sbuf;
/*
* Some source buffers , such as DMA memory , use write - combine
* caching , so reads are uncached . Speed up access by fetching
* one line at a time .
*/
if (!vaddr_cached_hint) {
stmp = drm_format_conv_state_reserve(state, sbuf_len, GFP_KERNEL);
if (!stmp)
return -ENOMEM;
}
if (!dst_pitch)
dst_pitch = drm_rect_width(clip) * dst_pixsize;
vaddr += clip_offset(clip, fb->pitches[0 ], fb->format->cpp[0 ]);
for (i = 0 ; i < lines; ++i) {
if (stmp)
sbuf = memcpy(stmp, vaddr, sbuf_len);
else
sbuf = vaddr;
xfrm_line(dst, sbuf, linepixels);
vaddr += fb->pitches[0 ];
dst += dst_pitch;
}
return 0 ;
}
/* TODO: Make this function work with multi-plane formats. */
static int __drm_fb_xfrm_toio(void __iomem *dst, unsigned long dst_pitch, unsigned long dst_pixsize,
const void *vaddr, const struct drm_framebuffer *fb,
const struct drm_rect *clip, bool vaddr_cached_hint,
struct drm_format_conv_state *state,
void (*xfrm_line)(void *dbuf, const void *sbuf, unsigned int npixels))
{
unsigned long linepixels = drm_rect_width(clip);
unsigned long lines = drm_rect_height(clip);
size_t dbuf_len = linepixels * dst_pixsize;
size_t stmp_off = round_up(dbuf_len, ARCH_KMALLOC_MINALIGN); /* for sbuf alignment */
size_t sbuf_len = linepixels * fb->format->cpp[0 ];
void *stmp = NULL;
unsigned long i;
const void *sbuf;
void *dbuf;
if (vaddr_cached_hint) {
dbuf = drm_format_conv_state_reserve(state, dbuf_len, GFP_KERNEL);
} else {
dbuf = drm_format_conv_state_reserve(state, stmp_off + sbuf_len, GFP_KERNEL);
stmp = dbuf + stmp_off;
}
if (!dbuf)
return -ENOMEM;
if (!dst_pitch)
dst_pitch = linepixels * dst_pixsize;
vaddr += clip_offset(clip, fb->pitches[0 ], fb->format->cpp[0 ]);
for (i = 0 ; i < lines; ++i) {
if (stmp)
sbuf = memcpy(stmp, vaddr, sbuf_len);
else
sbuf = vaddr;
xfrm_line(dbuf, sbuf, linepixels);
memcpy_toio(dst, dbuf, dbuf_len);
vaddr += fb->pitches[0 ];
dst += dst_pitch;
}
return 0 ;
}
/* TODO: Make this function work with multi-plane formats. */
static int drm_fb_xfrm(struct iosys_map *dst,
const unsigned int *dst_pitch, const u8 *dst_pixsize,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, bool vaddr_cached_hint,
struct drm_format_conv_state *state,
void (*xfrm_line)(void *dbuf, const void *sbuf, unsigned int npixels))
{
static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
0 , 0 , 0 , 0
};
if (!dst_pitch)
dst_pitch = default_dst_pitch;
/* TODO: handle src in I/O memory here */
if (dst[0 ].is_iomem)
return __drm_fb_xfrm_toio(dst[0 ].vaddr_iomem, dst_pitch[0 ], dst_pixsize[0 ],
src[0 ].vaddr, fb, clip, vaddr_cached_hint, state,
xfrm_line);
else
return __drm_fb_xfrm(dst[0 ].vaddr, dst_pitch[0 ], dst_pixsize[0 ],
src[0 ].vaddr, fb, clip, vaddr_cached_hint, state,
xfrm_line);
}
#define ALIGN_DOWN_PIXELS(end, n, a) \
((end) - ((n) & ((a) - 1 )))
static __always_inline void drm_fb_xfrm_line_32to8(void *dbuf, const void *sbuf,
unsigned int pixels,
u32 (*xfrm_pixel)(u32))
{
__le32 *dbuf32 = dbuf;
u8 *dbuf8;
const __le32 *sbuf32 = sbuf;
const __le32 *send32 = sbuf32 + pixels;
/* write 4 pixels at once */
while (sbuf32 < ALIGN_DOWN_PIXELS(send32, pixels, 4 )) {
u32 pix[4 ] = {
le32_to_cpup(sbuf32),
le32_to_cpup(sbuf32 + 1 ),
le32_to_cpup(sbuf32 + 2 ),
le32_to_cpup(sbuf32 + 3 ),
};
/* write output bytes in reverse order for little endianness */
u32 val32 = xfrm_pixel(pix[0 ]) |
(xfrm_pixel(pix[1 ]) << 8 ) |
(xfrm_pixel(pix[2 ]) << 16 ) |
(xfrm_pixel(pix[3 ]) << 24 );
*dbuf32++ = cpu_to_le32(val32);
sbuf32 += ARRAY_SIZE(pix);
}
/* write trailing pixels */
dbuf8 = (u8 __force *)dbuf32;
while (sbuf32 < send32)
*dbuf8++ = xfrm_pixel(le32_to_cpup(sbuf32++));
}
static __always_inline void drm_fb_xfrm_line_32to16(void *dbuf, const void *sbuf,
unsigned int pixels,
u32 (*xfrm_pixel)(u32))
{
__le64 *dbuf64 = dbuf;
__le32 *dbuf32;
__le16 *dbuf16;
const __le32 *sbuf32 = sbuf;
const __le32 *send32 = sbuf32 + pixels;
#if defined (CONFIG_64BIT)
/* write 4 pixels at once */
while (sbuf32 < ALIGN_DOWN_PIXELS(send32, pixels, 4 )) {
u32 pix[4 ] = {
le32_to_cpup(sbuf32),
le32_to_cpup(sbuf32 + 1 ),
le32_to_cpup(sbuf32 + 2 ),
le32_to_cpup(sbuf32 + 3 ),
};
/* write output bytes in reverse order for little endianness */
u64 val64 = ((u64)xfrm_pixel(pix[0 ])) |
((u64)xfrm_pixel(pix[1 ]) << 16 ) |
((u64)xfrm_pixel(pix[2 ]) << 32 ) |
((u64)xfrm_pixel(pix[3 ]) << 48 );
*dbuf64++ = cpu_to_le64(val64);
sbuf32 += ARRAY_SIZE(pix);
}
#endif
/* write 2 pixels at once */
dbuf32 = (__le32 __force *)dbuf64;
while (sbuf32 < ALIGN_DOWN_PIXELS(send32, pixels, 2 )) {
u32 pix[2 ] = {
le32_to_cpup(sbuf32),
le32_to_cpup(sbuf32 + 1 ),
};
/* write output bytes in reverse order for little endianness */
u32 val32 = xfrm_pixel(pix[0 ]) |
(xfrm_pixel(pix[1 ]) << 16 );
*dbuf32++ = cpu_to_le32(val32);
sbuf32 += ARRAY_SIZE(pix);
}
/* write trailing pixel */
dbuf16 = (__le16 __force *)dbuf32;
while (sbuf32 < send32)
*dbuf16++ = cpu_to_le16(xfrm_pixel(le32_to_cpup(sbuf32++)));
}
static __always_inline void drm_fb_xfrm_line_32to24(void *dbuf, const void *sbuf,
unsigned int pixels,
u32 (*xfrm_pixel)(u32))
{
__le32 *dbuf32 = dbuf;
u8 *dbuf8;
const __le32 *sbuf32 = sbuf;
const __le32 *send32 = sbuf32 + pixels;
/* write pixels in chunks of 4 */
while (sbuf32 < ALIGN_DOWN_PIXELS(send32, pixels, 4 )) {
u32 val24[4 ] = {
xfrm_pixel(le32_to_cpup(sbuf32)),
xfrm_pixel(le32_to_cpup(sbuf32 + 1 )),
xfrm_pixel(le32_to_cpup(sbuf32 + 2 )),
xfrm_pixel(le32_to_cpup(sbuf32 + 3 )),
};
u32 out32[3 ] = {
/* write output bytes in reverse order for little endianness */
((val24[0 ] & 0 x000000ff)) |
((val24[0 ] & 0 x0000ff00)) |
((val24[0 ] & 0 x00ff0000)) |
((val24[1 ] & 0 x000000ff) << 24 ),
((val24[1 ] & 0 x0000ff00) >> 8 ) |
((val24[1 ] & 0 x00ff0000) >> 8 ) |
((val24[2 ] & 0 x000000ff) << 16 ) |
((val24[2 ] & 0 x0000ff00) << 16 ),
((val24[2 ] & 0 x00ff0000) >> 16 ) |
((val24[3 ] & 0 x000000ff) << 8 ) |
((val24[3 ] & 0 x0000ff00) << 8 ) |
((val24[3 ] & 0 x00ff0000) << 8 ),
};
*dbuf32++ = cpu_to_le32(out32[0 ]);
*dbuf32++ = cpu_to_le32(out32[1 ]);
*dbuf32++ = cpu_to_le32(out32[2 ]);
sbuf32 += ARRAY_SIZE(val24);
}
/* write trailing pixel */
dbuf8 = (u8 __force *)dbuf32;
while (sbuf32 < send32) {
u32 val24 = xfrm_pixel(le32_to_cpup(sbuf32++));
/* write output in reverse order for little endianness */
*dbuf8++ = (val24 & 0 x000000ff);
*dbuf8++ = (val24 & 0 x0000ff00) >> 8 ;
*dbuf8++ = (val24 & 0 x00ff0000) >> 16 ;
}
}
static __always_inline void drm_fb_xfrm_line_32to32(void *dbuf, const void *sbuf,
unsigned int pixels,
u32 (*xfrm_pixel)(u32))
{
__le32 *dbuf32 = dbuf;
const __le32 *sbuf32 = sbuf;
const __le32 *send32 = sbuf32 + pixels;
while (sbuf32 < send32)
*dbuf32++ = cpu_to_le32(xfrm_pixel(le32_to_cpup(sbuf32++)));
}
/**
* drm_fb_memcpy - Copy clip buffer
* @ dst : Array of destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
*
* This function copies parts of a framebuffer to display memory . Destination and
* framebuffer formats must match . No conversion takes place . The parameters @ dst ,
* @ dst_pitch and @ src refer to arrays . Each array must have at least as many entries
* as there are planes in @ fb ' s format . Each entry stores the value for the format ' s
* respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*/
void drm_fb_memcpy(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip)
{
static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
0 , 0 , 0 , 0
};
const struct drm_format_info *format = fb->format;
unsigned int i, y, lines = drm_rect_height(clip);
if (!dst_pitch)
dst_pitch = default_dst_pitch;
for (i = 0 ; i < format->num_planes; ++i) {
unsigned int bpp_i = drm_format_info_bpp(format, i);
unsigned int cpp_i = DIV_ROUND_UP(bpp_i, 8 );
size_t len_i = DIV_ROUND_UP(drm_rect_width(clip) * bpp_i, 8 );
unsigned int dst_pitch_i = dst_pitch[i];
struct iosys_map dst_i = dst[i];
struct iosys_map src_i = src[i];
if (!dst_pitch_i)
dst_pitch_i = len_i;
iosys_map_incr(&src_i, clip_offset(clip, fb->pitches[i], cpp_i));
for (y = 0 ; y < lines; y++) {
/* TODO: handle src_i in I/O memory here */
iosys_map_memcpy_to(&dst_i, 0 , src_i.vaddr, len_i);
iosys_map_incr(&src_i, fb->pitches[i]);
iosys_map_incr(&dst_i, dst_pitch_i);
}
}
}
EXPORT_SYMBOL(drm_fb_memcpy);
static void drm_fb_swab16_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
u16 *dbuf16 = dbuf;
const u16 *sbuf16 = sbuf;
const u16 *send16 = sbuf16 + pixels;
while (sbuf16 < send16)
*dbuf16++ = swab16(*sbuf16++);
}
static void drm_fb_swab32_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
u32 *dbuf32 = dbuf;
const u32 *sbuf32 = sbuf;
const u32 *send32 = sbuf32 + pixels;
while (sbuf32 < send32)
*dbuf32++ = swab32(*sbuf32++);
}
/**
* drm_fb_swab - Swap bytes into clip buffer
* @ dst : Array of destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ cached : Source buffer is mapped cached ( eg . not write - combined )
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and swaps per - pixel
* bytes during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index . If @ cached is
* false a temporary buffer is used to cache one pixel line at a time to speed up
* slow uncached reads .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*/
void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, bool cached,
struct drm_format_conv_state *state)
{
const struct drm_format_info *format = fb->format;
u8 cpp = DIV_ROUND_UP(drm_format_info_bpp(format, 0 ), 8 );
void (*swab_line)(void *dbuf, const void *sbuf, unsigned int npixels);
switch (cpp) {
case 4 :
swab_line = drm_fb_swab32_line;
break ;
case 2 :
swab_line = drm_fb_swab16_line;
break ;
default :
drm_warn_once(fb->dev, "Format %p4cc has unsupported pixel size.\n" ,
&format->format);
return ;
}
drm_fb_xfrm(dst, dst_pitch, &cpp, src, fb, clip, cached, state, swab_line);
}
EXPORT_SYMBOL(drm_fb_swab);
static void drm_fb_xrgb8888_to_rgb332_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to8(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_rgb332);
}
/**
* drm_fb_xrgb8888_to_rgb332 - Convert XRGB8888 to RGB332 clip buffer
* @ dst : Array of RGB332 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for RGB332 devices that don ' t support XRGB8888 natively .
*/
void drm_fb_xrgb8888_to_rgb332(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
1 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_rgb332_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb332);
static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to16(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_rgb565);
}
/**
* drm_fb_xrgb8888_to_rgb565 - Convert XRGB8888 to RGB565 clip buffer
* @ dst : Array of RGB565 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for RGB565 devices that don ' t support XRGB8888 natively .
*/
void drm_fb_xrgb8888_to_rgb565(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
2 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_rgb565_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565);
static void drm_fb_xrgb8888_to_rgb565be_line(void *dbuf, const void *sbuf,
unsigned int pixels)
{
drm_fb_xfrm_line_32to16(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_rgb565be);
}
/**
* drm_fb_xrgb8888_to_rgb565be - Convert XRGB8888 to RGB565 | DRM_FORMAT_BIG_ENDIAN clip buffer
* @ dst : Array of RGB565BE destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for RGB565BE devices that don ' t support XRGB8888 natively .
*/
void drm_fb_xrgb8888_to_rgb565be(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
2 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_rgb565be_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565be);
static void drm_fb_xrgb8888_to_xrgb1555_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to16(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_xrgb1555);
}
/**
* drm_fb_xrgb8888_to_xrgb1555 - Convert XRGB8888 to XRGB1555 clip buffer
* @ dst : Array of XRGB1555 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts
* the color format during the process . The parameters @ dst , @ dst_pitch and
* @ src refer to arrays . Each array must have at least as many entries as
* there are planes in @ fb ' s format . Each entry stores the value for the
* format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for XRGB1555 devices that don ' t support
* XRGB8888 natively .
*/
void drm_fb_xrgb8888_to_xrgb1555(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
2 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_xrgb1555_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb1555);
static void drm_fb_xrgb8888_to_argb1555_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to16(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_argb1555);
}
/**
* drm_fb_xrgb8888_to_argb1555 - Convert XRGB8888 to ARGB1555 clip buffer
* @ dst : Array of ARGB1555 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts
* the color format during the process . The parameters @ dst , @ dst_pitch and
* @ src refer to arrays . Each array must have at least as many entries as
* there are planes in @ fb ' s format . Each entry stores the value for the
* format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for ARGB1555 devices that don ' t support
* XRGB8888 natively . It sets an opaque alpha channel as part of the conversion .
*/
void drm_fb_xrgb8888_to_argb1555(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
2 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_argb1555_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb1555);
static void drm_fb_xrgb8888_to_rgba5551_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to16(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_rgba5551);
}
/**
* drm_fb_xrgb8888_to_rgba5551 - Convert XRGB8888 to RGBA5551 clip buffer
* @ dst : Array of RGBA5551 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts
* the color format during the process . The parameters @ dst , @ dst_pitch and
* @ src refer to arrays . Each array must have at least as many entries as
* there are planes in @ fb ' s format . Each entry stores the value for the
* format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for RGBA5551 devices that don ' t support
* XRGB8888 natively . It sets an opaque alpha channel as part of the conversion .
*/
void drm_fb_xrgb8888_to_rgba5551(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
2 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_rgba5551_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgba5551);
static void drm_fb_xrgb8888_to_rgb888_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to24(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_rgb888);
}
/**
* drm_fb_xrgb8888_to_rgb888 - Convert XRGB8888 to RGB888 clip buffer
* @ dst : Array of RGB888 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for RGB888 devices that don ' t natively
* support XRGB8888 .
*/
void drm_fb_xrgb8888_to_rgb888(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
3 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_rgb888_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888);
static void drm_fb_xrgb8888_to_bgr888_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to24(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_bgr888);
}
/**
* drm_fb_xrgb8888_to_bgr888 - Convert XRGB8888 to BGR888 clip buffer
* @ dst : Array of BGR888 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for BGR888 devices that don ' t natively
* support XRGB8888 .
*/
void drm_fb_xrgb8888_to_bgr888(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
3 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_bgr888_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_bgr888);
static void drm_fb_xrgb8888_to_argb8888_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to32(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_argb8888);
}
/**
* drm_fb_xrgb8888_to_argb8888 - Convert XRGB8888 to ARGB8888 clip buffer
* @ dst : Array of ARGB8888 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . The parameters @ dst , @ dst_pitch and @ src refer
* to arrays . Each array must have at least as many entries as there are planes in
* @ fb ' s format . Each entry stores the value for the format ' s respective color plane
* at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for ARGB8888 devices that don ' t support XRGB8888
* natively . It sets an opaque alpha channel as part of the conversion .
*/
void drm_fb_xrgb8888_to_argb8888(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
4 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_argb8888_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb8888);
static void drm_fb_xrgb8888_to_abgr8888_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to32(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_abgr8888);
}
/**
* drm_fb_xrgb8888_to_abgr8888 - Convert XRGB8888 to ABGR8888 clip buffer
* @ dst : Array of ABGR8888 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . The parameters @ dst , @ dst_pitch and @ src refer
* to arrays . Each array must have at least as many entries as there are planes in
* @ fb ' s format . Each entry stores the value for the format ' s respective color plane
* at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for ABGR8888 devices that don ' t support XRGB8888
* natively . It sets an opaque alpha channel as part of the conversion .
*/
void drm_fb_xrgb8888_to_abgr8888(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src,
const struct drm_framebuffer *fb,
const struct drm_rect *clip,
struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
4 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_abgr8888_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_abgr8888);
static void drm_fb_xrgb8888_to_xbgr8888_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to32(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_xbgr8888);
}
/**
* drm_fb_xrgb8888_to_xbgr8888 - Convert XRGB8888 to XBGR8888 clip buffer
* @ dst : Array of XBGR8888 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . The parameters @ dst , @ dst_pitch and @ src refer
* to arrays . Each array must have at least as many entries as there are planes in
* @ fb ' s format . Each entry stores the value for the format ' s respective color plane
* at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for XBGR8888 devices that don ' t support XRGB8888
* natively .
*/
void drm_fb_xrgb8888_to_xbgr8888(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src,
const struct drm_framebuffer *fb,
const struct drm_rect *clip,
struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
4 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_xbgr8888_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_xbgr8888);
static void drm_fb_xrgb8888_to_bgrx8888_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to32(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_bgrx8888);
}
/**
* drm_fb_xrgb8888_to_bgrx8888 - Convert XRGB8888 to BGRX8888 clip buffer
* @ dst : Array of BGRX8888 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . The parameters @ dst , @ dst_pitch and @ src refer
* to arrays . Each array must have at least as many entries as there are planes in
* @ fb ' s format . Each entry stores the value for the format ' s respective color plane
* at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for BGRX8888 devices that don ' t support XRGB8888
* natively .
*/
void drm_fb_xrgb8888_to_bgrx8888(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src,
const struct drm_framebuffer *fb,
const struct drm_rect *clip,
struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
4 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_bgrx8888_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_bgrx8888);
static void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to32(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_xrgb2101010);
}
/**
* drm_fb_xrgb8888_to_xrgb2101010 - Convert XRGB8888 to XRGB2101010 clip buffer
* @ dst : Array of XRGB2101010 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for XRGB2101010 devices that don ' t support XRGB8888
* natively .
*/
void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip,
struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
4 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_xrgb2101010_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb2101010);
static void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to32(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_argb2101010);
}
/**
* drm_fb_xrgb8888_to_argb2101010 - Convert XRGB8888 to ARGB2101010 clip buffer
* @ dst : Array of ARGB2101010 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts
* the color format during the process . The parameters @ dst , @ dst_pitch and
* @ src refer to arrays . Each array must have at least as many entries as
* there are planes in @ fb ' s format . Each entry stores the value for the
* format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for ARGB2101010 devices that don ' t support XRGB8888
* natively .
*/
void drm_fb_xrgb8888_to_argb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip,
struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
4 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_argb2101010_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb2101010);
static void drm_fb_xrgb8888_to_gray8_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to8(dbuf, sbuf, pixels, drm_pixel_xrgb8888_to_r8_bt601);
}
/**
* drm_fb_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale
* @ dst : Array of 8 - bit grayscale destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* DRM doesn ' t have native monochrome or grayscale support . Drivers can use this
* function for grayscale devices that don ' t support XRGB8888 natively . Such
* drivers can announce the commonly supported XR24 format to userspace and use
* this function to convert to the native format . Monochrome drivers will use the
* most significant bit , where 1 means foreground color and 0 background color .
* ITU BT . 601 is being used for the RGB - > luma ( brightness ) conversion .
*/
void drm_fb_xrgb8888_to_gray8(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
1 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_xrgb8888_to_gray8_line);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray8);
static void drm_fb_argb8888_to_argb4444_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
drm_fb_xfrm_line_32to16(dbuf, sbuf, pixels, drm_pixel_argb8888_to_argb4444);
}
/**
* drm_fb_argb8888_to_argb4444 - Convert ARGB8888 to ARGB4444 clip buffer
* @ dst : Array of ARGB4444 destination buffers
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of ARGB8888 source buffer
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts
* the color format during the process . The parameters @ dst , @ dst_pitch and
* @ src refer to arrays . Each array must have at least as many entries as
* there are planes in @ fb ' s format . Each entry stores the value for the
* format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Drivers can use this function for ARGB4444 devices that don ' t support
* ARGB8888 natively .
*/
void drm_fb_argb8888_to_argb4444(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
2 ,
};
drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false , state,
drm_fb_argb8888_to_argb4444_line);
}
EXPORT_SYMBOL(drm_fb_argb8888_to_argb4444);
/**
* drm_fb_blit - Copy parts of a framebuffer to display memory
* @ dst : Array of display - memory addresses to copy to
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ dst_format : FOURCC code of the display ' s color format
* @ src : The framebuffer memory to copy from
* @ fb : The framebuffer to copy from
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory . If the
* formats of the display and the framebuffer mismatch , the blit function
* will attempt to convert between them during the process . The parameters @ dst ,
* @ dst_pitch and @ src refer to arrays . Each array must have at least as many
* entries as there are planes in @ dst_format ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) .
*
* Returns :
* 0 on success , or
* - EINVAL if the color - format conversion failed , or
* a negative error code otherwise .
*/
int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t dst_format,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
uint32_t fb_format = fb->format->format;
if (fb_format == dst_format) {
drm_fb_memcpy(dst, dst_pitch, src, fb, clip);
return 0 ;
} else if (fb_format == (dst_format | DRM_FORMAT_BIG_ENDIAN)) {
drm_fb_swab(dst, dst_pitch, src, fb, clip, false , state);
return 0 ;
} else if (fb_format == (dst_format & ~DRM_FORMAT_BIG_ENDIAN)) {
drm_fb_swab(dst, dst_pitch, src, fb, clip, false , state);
return 0 ;
} else if (fb_format == DRM_FORMAT_XRGB8888) {
if (dst_format == DRM_FORMAT_RGB565) {
drm_fb_xrgb8888_to_rgb565(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_XRGB1555) {
drm_fb_xrgb8888_to_xrgb1555(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_ARGB1555) {
drm_fb_xrgb8888_to_argb1555(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_RGBA5551) {
drm_fb_xrgb8888_to_rgba5551(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_RGB888) {
drm_fb_xrgb8888_to_rgb888(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_BGR888) {
drm_fb_xrgb8888_to_bgr888(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_ARGB8888) {
drm_fb_xrgb8888_to_argb8888(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_XBGR8888) {
drm_fb_xrgb8888_to_xbgr8888(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_ABGR8888) {
drm_fb_xrgb8888_to_abgr8888(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_XRGB2101010) {
drm_fb_xrgb8888_to_xrgb2101010(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_ARGB2101010) {
drm_fb_xrgb8888_to_argb2101010(dst, dst_pitch, src, fb, clip, state);
return 0 ;
} else if (dst_format == DRM_FORMAT_BGRX8888) {
drm_fb_swab(dst, dst_pitch, src, fb, clip, false , state);
return 0 ;
}
}
drm_warn_once(fb->dev, "No conversion helper from %p4cc to %p4cc found.\n" ,
&fb_format, &dst_format);
return -EINVAL;
}
EXPORT_SYMBOL(drm_fb_blit);
static void drm_fb_gray8_to_mono_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
u8 *dbuf8 = dbuf;
const u8 *sbuf8 = sbuf;
while (pixels) {
unsigned int i, bits = min(pixels, 8 U);
u8 byte = 0 ;
for (i = 0 ; i < bits; i++, pixels--) {
if (*sbuf8++ >= 128 )
byte |= BIT(i);
}
*dbuf8++ = byte;
}
}
/**
* drm_fb_xrgb8888_to_mono - Convert XRGB8888 to monochrome
* @ dst : Array of monochrome destination buffers ( 0 = black , 1 = white )
* @ dst_pitch : Array of numbers of bytes between the start of two consecutive scanlines
* within @ dst ; can be NULL if scanlines are stored next to each other .
* @ src : Array of XRGB8888 source buffers
* @ fb : DRM framebuffer
* @ clip : Clip rectangle area to copy
* @ state : Transform and conversion state
*
* This function copies parts of a framebuffer to display memory and converts the
* color format during the process . Destination and framebuffer formats must match . The
* parameters @ dst , @ dst_pitch and @ src refer to arrays . Each array must have at
* least as many entries as there are planes in @ fb ' s format . Each entry stores the
* value for the format ' s respective color plane at the same index .
*
* This function does not apply clipping on @ dst ( i . e . the destination is at the
* top - left corner ) . The first pixel ( upper left corner of the clip rectangle ) will
* be converted and copied to the first bit ( LSB ) in the first byte of the monochrome
* destination buffer . If the caller requires that the first pixel in a byte must
* be located at an x - coordinate that is a multiple of 8 , then the caller must take
* care itself of supplying a suitable clip rectangle .
*
* DRM doesn ' t have native monochrome support . Drivers can use this function for
* monochrome devices that don ' t support XRGB8888 natively . Such drivers can
* announce the commonly supported XR24 format to userspace and use this function
* to convert to the native format .
*
* This function uses drm_fb_xrgb8888_to_gray8 ( ) to convert to grayscale and
* then the result is converted from grayscale to monochrome .
*/
void drm_fb_xrgb8888_to_mono(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *src, const struct drm_framebuffer *fb,
const struct drm_rect *clip, struct drm_format_conv_state *state)
{
static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
0 , 0 , 0 , 0
};
unsigned int linepixels = drm_rect_width(clip);
unsigned int lines = drm_rect_height(clip);
unsigned int cpp = fb->format->cpp[0 ];
unsigned int len_src32 = linepixels * cpp;
struct drm_device *dev = fb->dev;
void *vaddr = src[0 ].vaddr;
unsigned int dst_pitch_0;
unsigned int y;
u8 *mono = dst[0 ].vaddr, *gray8;
u32 *src32;
if (drm_WARN_ON(dev, fb->format->format != DRM_FORMAT_XRGB8888))
return ;
if (!dst_pitch)
dst_pitch = default_dst_pitch;
dst_pitch_0 = dst_pitch[0 ];
/*
* The mono destination buffer contains 1 bit per pixel
*/
if (!dst_pitch_0)
dst_pitch_0 = DIV_ROUND_UP(linepixels, 8 );
/*
* The dma memory is write - combined so reads are uncached .
* Speed up by fetching one line at a time .
*
* Also , format conversion from XR24 to monochrome are done
* line - by - line but are converted to 8 - bit grayscale as an
* intermediate step .
*
* Allocate a buffer to be used for both copying from the cma
* memory and to store the intermediate grayscale line pixels .
*/
src32 = drm_format_conv_state_reserve(state, len_src32 + linepixels, GFP_KERNEL);
if (!src32)
return ;
gray8 = (u8 *)src32 + len_src32;
vaddr += clip_offset(clip, fb->pitches[0 ], cpp);
for (y = 0 ; y < lines; y++) {
src32 = memcpy(src32, vaddr, len_src32);
drm_fb_xrgb8888_to_gray8_line(gray8, src32, linepixels);
drm_fb_gray8_to_mono_line(mono, gray8, linepixels);
vaddr += fb->pitches[0 ];
mono += dst_pitch_0;
}
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_mono);
Messung V0.5 in Prozent C=96 H=97 G=96
¤ Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
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(vorverarbeitet am 2026-09-29)
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