forked from mirrors/linux
b7147e9a15
Also drop the dstclip parameter sphinx has warned about (leftover from an earlier patch version). Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20190416090533.28374-1-kraxel@redhat.com
324 lines
8.7 KiB
C
324 lines
8.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2016 Noralf Trønnes
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <drm/drm_format_helper.h>
|
|
#include <drm/drm_framebuffer.h>
|
|
#include <drm/drm_fourcc.h>
|
|
#include <drm/drm_rect.h>
|
|
|
|
static unsigned int clip_offset(struct drm_rect *clip,
|
|
unsigned int pitch, unsigned int cpp)
|
|
{
|
|
return clip->y1 * pitch + clip->x1 * cpp;
|
|
}
|
|
|
|
/**
|
|
* drm_fb_memcpy - Copy clip buffer
|
|
* @dst: Destination buffer
|
|
* @vaddr: Source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
*
|
|
* This function does not apply clipping on dst, i.e. the destination
|
|
* is a small buffer containing the clip rect only.
|
|
*/
|
|
void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
|
|
struct drm_rect *clip)
|
|
{
|
|
unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
|
|
size_t len = (clip->x2 - clip->x1) * cpp;
|
|
unsigned int y, lines = clip->y2 - clip->y1;
|
|
|
|
vaddr += clip_offset(clip, fb->pitches[0], cpp);
|
|
for (y = 0; y < lines; y++) {
|
|
memcpy(dst, vaddr, len);
|
|
vaddr += fb->pitches[0];
|
|
dst += len;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_memcpy);
|
|
|
|
/**
|
|
* drm_fb_memcpy_dstclip - Copy clip buffer
|
|
* @dst: Destination buffer (iomem)
|
|
* @vaddr: Source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
*
|
|
* This function applies clipping on dst, i.e. the destination is a
|
|
* full (iomem) framebuffer but only the clip rect content is copied over.
|
|
*/
|
|
void drm_fb_memcpy_dstclip(void __iomem *dst, void *vaddr,
|
|
struct drm_framebuffer *fb,
|
|
struct drm_rect *clip)
|
|
{
|
|
unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
|
|
unsigned int offset = clip_offset(clip, fb->pitches[0], cpp);
|
|
size_t len = (clip->x2 - clip->x1) * cpp;
|
|
unsigned int y, lines = clip->y2 - clip->y1;
|
|
|
|
vaddr += offset;
|
|
dst += offset;
|
|
for (y = 0; y < lines; y++) {
|
|
memcpy_toio(dst, vaddr, len);
|
|
vaddr += fb->pitches[0];
|
|
dst += fb->pitches[0];
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_memcpy_dstclip);
|
|
|
|
/**
|
|
* drm_fb_swab16 - Swap bytes into clip buffer
|
|
* @dst: RGB565 destination buffer
|
|
* @vaddr: RGB565 source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
*/
|
|
void drm_fb_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
|
|
struct drm_rect *clip)
|
|
{
|
|
size_t len = (clip->x2 - clip->x1) * sizeof(u16);
|
|
unsigned int x, y;
|
|
u16 *src, *buf;
|
|
|
|
/*
|
|
* The cma memory is write-combined so reads are uncached.
|
|
* Speed up by fetching one line at a time.
|
|
*/
|
|
buf = kmalloc(len, GFP_KERNEL);
|
|
if (!buf)
|
|
return;
|
|
|
|
for (y = clip->y1; y < clip->y2; y++) {
|
|
src = vaddr + (y * fb->pitches[0]);
|
|
src += clip->x1;
|
|
memcpy(buf, src, len);
|
|
src = buf;
|
|
for (x = clip->x1; x < clip->x2; x++)
|
|
*dst++ = swab16(*src++);
|
|
}
|
|
|
|
kfree(buf);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_swab16);
|
|
|
|
static void drm_fb_xrgb8888_to_rgb565_line(u16 *dbuf, u32 *sbuf,
|
|
unsigned int pixels,
|
|
bool swab)
|
|
{
|
|
unsigned int x;
|
|
u16 val16;
|
|
|
|
for (x = 0; x < pixels; x++) {
|
|
val16 = ((sbuf[x] & 0x00F80000) >> 8) |
|
|
((sbuf[x] & 0x0000FC00) >> 5) |
|
|
((sbuf[x] & 0x000000F8) >> 3);
|
|
if (swab)
|
|
dbuf[x] = swab16(val16);
|
|
else
|
|
dbuf[x] = val16;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_fb_xrgb8888_to_rgb565 - Convert XRGB8888 to RGB565 clip buffer
|
|
* @dst: RGB565 destination buffer
|
|
* @vaddr: XRGB8888 source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
* @swab: Swap bytes
|
|
*
|
|
* Drivers can use this function for RGB565 devices that don't natively
|
|
* support XRGB8888.
|
|
*
|
|
* This function does not apply clipping on dst, i.e. the destination
|
|
* is a small buffer containing the clip rect only.
|
|
*/
|
|
void drm_fb_xrgb8888_to_rgb565(void *dst, void *vaddr,
|
|
struct drm_framebuffer *fb,
|
|
struct drm_rect *clip, bool swab)
|
|
{
|
|
size_t linepixels = clip->x2 - clip->x1;
|
|
size_t src_len = linepixels * sizeof(u32);
|
|
size_t dst_len = linepixels * sizeof(u16);
|
|
unsigned y, lines = clip->y2 - clip->y1;
|
|
void *sbuf;
|
|
|
|
/*
|
|
* The cma memory is write-combined so reads are uncached.
|
|
* Speed up by fetching one line at a time.
|
|
*/
|
|
sbuf = kmalloc(src_len, GFP_KERNEL);
|
|
if (!sbuf)
|
|
return;
|
|
|
|
vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32));
|
|
for (y = 0; y < lines; y++) {
|
|
memcpy(sbuf, vaddr, src_len);
|
|
drm_fb_xrgb8888_to_rgb565_line(dst, sbuf, linepixels, swab);
|
|
vaddr += fb->pitches[0];
|
|
dst += dst_len;
|
|
}
|
|
|
|
kfree(sbuf);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565);
|
|
|
|
/**
|
|
* drm_fb_xrgb8888_to_rgb565_dstclip - Convert XRGB8888 to RGB565 clip buffer
|
|
* @dst: RGB565 destination buffer (iomem)
|
|
* @dst_pitch: destination buffer pitch
|
|
* @vaddr: XRGB8888 source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
* @swab: Swap bytes
|
|
*
|
|
* Drivers can use this function for RGB565 devices that don't natively
|
|
* support XRGB8888.
|
|
*
|
|
* This function applies clipping on dst, i.e. the destination is a
|
|
* full (iomem) framebuffer but only the clip rect content is copied over.
|
|
*/
|
|
void drm_fb_xrgb8888_to_rgb565_dstclip(void __iomem *dst, unsigned int dst_pitch,
|
|
void *vaddr, struct drm_framebuffer *fb,
|
|
struct drm_rect *clip, bool swab)
|
|
{
|
|
size_t linepixels = clip->x2 - clip->x1;
|
|
size_t dst_len = linepixels * sizeof(u16);
|
|
unsigned y, lines = clip->y2 - clip->y1;
|
|
void *dbuf;
|
|
|
|
dbuf = kmalloc(dst_len, GFP_KERNEL);
|
|
if (!dbuf)
|
|
return;
|
|
|
|
vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32));
|
|
dst += clip_offset(clip, dst_pitch, sizeof(u16));
|
|
for (y = 0; y < lines; y++) {
|
|
drm_fb_xrgb8888_to_rgb565_line(dbuf, vaddr, linepixels, swab);
|
|
memcpy_toio(dst, dbuf, dst_len);
|
|
vaddr += fb->pitches[0];
|
|
dst += dst_len;
|
|
}
|
|
|
|
kfree(dbuf);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565_dstclip);
|
|
|
|
static void drm_fb_xrgb8888_to_rgb888_line(u8 *dbuf, u32 *sbuf,
|
|
unsigned int pixels)
|
|
{
|
|
unsigned int x;
|
|
|
|
for (x = 0; x < pixels; x++) {
|
|
*dbuf++ = (sbuf[x] & 0x000000FF) >> 0;
|
|
*dbuf++ = (sbuf[x] & 0x0000FF00) >> 8;
|
|
*dbuf++ = (sbuf[x] & 0x00FF0000) >> 16;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_fb_xrgb8888_to_rgb888_dstclip - Convert XRGB8888 to RGB888 clip buffer
|
|
* @dst: RGB565 destination buffer (iomem)
|
|
* @dst_pitch: destination buffer pitch
|
|
* @vaddr: XRGB8888 source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
*
|
|
* Drivers can use this function for RGB888 devices that don't natively
|
|
* support XRGB8888.
|
|
*
|
|
* This function applies clipping on dst, i.e. the destination is a
|
|
* full (iomem) framebuffer but only the clip rect content is copied over.
|
|
*/
|
|
void drm_fb_xrgb8888_to_rgb888_dstclip(void __iomem *dst, unsigned int dst_pitch,
|
|
void *vaddr, struct drm_framebuffer *fb,
|
|
struct drm_rect *clip)
|
|
{
|
|
size_t linepixels = clip->x2 - clip->x1;
|
|
size_t dst_len = linepixels * 3;
|
|
unsigned y, lines = clip->y2 - clip->y1;
|
|
void *dbuf;
|
|
|
|
dbuf = kmalloc(dst_len, GFP_KERNEL);
|
|
if (!dbuf)
|
|
return;
|
|
|
|
vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32));
|
|
dst += clip_offset(clip, dst_pitch, sizeof(u16));
|
|
for (y = 0; y < lines; y++) {
|
|
drm_fb_xrgb8888_to_rgb888_line(dbuf, vaddr, linepixels);
|
|
memcpy_toio(dst, dbuf, dst_len);
|
|
vaddr += fb->pitches[0];
|
|
dst += dst_len;
|
|
}
|
|
|
|
kfree(dbuf);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888_dstclip);
|
|
|
|
/**
|
|
* drm_fb_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale
|
|
* @dst: 8-bit grayscale destination buffer
|
|
* @vaddr: XRGB8888 source buffer
|
|
* @fb: DRM framebuffer
|
|
* @clip: Clip rectangle area to copy
|
|
*
|
|
* Drm doesn't have native monochrome or grayscale support.
|
|
* 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 used for the RGB -> luma (brightness) conversion.
|
|
*/
|
|
void drm_fb_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
|
|
struct drm_rect *clip)
|
|
{
|
|
unsigned int len = (clip->x2 - clip->x1) * sizeof(u32);
|
|
unsigned int x, y;
|
|
void *buf;
|
|
u32 *src;
|
|
|
|
if (WARN_ON(fb->format->format != DRM_FORMAT_XRGB8888))
|
|
return;
|
|
/*
|
|
* The cma memory is write-combined so reads are uncached.
|
|
* Speed up by fetching one line at a time.
|
|
*/
|
|
buf = kmalloc(len, GFP_KERNEL);
|
|
if (!buf)
|
|
return;
|
|
|
|
for (y = clip->y1; y < clip->y2; y++) {
|
|
src = vaddr + (y * fb->pitches[0]);
|
|
src += clip->x1;
|
|
memcpy(buf, src, len);
|
|
src = buf;
|
|
for (x = clip->x1; x < clip->x2; x++) {
|
|
u8 r = (*src & 0x00ff0000) >> 16;
|
|
u8 g = (*src & 0x0000ff00) >> 8;
|
|
u8 b = *src & 0x000000ff;
|
|
|
|
/* ITU BT.601: Y = 0.299 R + 0.587 G + 0.114 B */
|
|
*dst++ = (3 * r + 6 * g + b) / 10;
|
|
src++;
|
|
}
|
|
}
|
|
|
|
kfree(buf);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray8);
|
|
|