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9b13a3fcd3
There is no "reversed" handling in drm_fb_xrgb8888_to_mono_reversed():
the function just converts from color to grayscale, and reduces the
number of grayscale levels from 256 to 2 (i.e. brightness 0-127 is
mapped to 0, 128-255 to 1). All "reversed" handling is done in the
repaper driver, where this function originated.
Hence make this clear by renaming drm_fb_xrgb8888_to_mono_reversed() to
drm_fb_xrgb8888_to_mono(), and documenting the black/white pixel
mapping.
Fixes: bcf8b616de ("drm/format-helper: Add drm_fb_xrgb8888_to_mono_reversed()")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220317081830.1211400-2-geert@linux-m68k.org
49 lines
2.3 KiB
C
49 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2016 Noralf Trønnes
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*/
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#ifndef __LINUX_DRM_FORMAT_HELPER_H
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#define __LINUX_DRM_FORMAT_HELPER_H
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struct drm_format_info;
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struct drm_framebuffer;
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struct drm_rect;
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unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format,
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const struct drm_rect *clip);
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void drm_fb_memcpy(void *dst, unsigned int dst_pitch, const void *vaddr,
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const struct drm_framebuffer *fb, const struct drm_rect *clip);
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void drm_fb_memcpy_toio(void __iomem *dst, unsigned int dst_pitch, const void *vaddr,
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const struct drm_framebuffer *fb, const struct drm_rect *clip);
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void drm_fb_swab(void *dst, unsigned int dst_pitch, const void *src,
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const struct drm_framebuffer *fb, const struct drm_rect *clip,
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bool cached);
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void drm_fb_xrgb8888_to_rgb332(void *dst, unsigned int dst_pitch, const void *vaddr,
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const struct drm_framebuffer *fb, const struct drm_rect *clip);
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void drm_fb_xrgb8888_to_rgb565(void *dst, unsigned int dst_pitch, const void *vaddr,
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const struct drm_framebuffer *fb, const struct drm_rect *clip,
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bool swab);
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void drm_fb_xrgb8888_to_rgb565_toio(void __iomem *dst, unsigned int dst_pitch,
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const void *vaddr, const struct drm_framebuffer *fb,
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const struct drm_rect *clip, bool swab);
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void drm_fb_xrgb8888_to_rgb888(void *dst, unsigned int dst_pitch, const void *src,
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const struct drm_framebuffer *fb, const struct drm_rect *clip);
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void drm_fb_xrgb8888_to_rgb888_toio(void __iomem *dst, unsigned int dst_pitch,
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const void *vaddr, const struct drm_framebuffer *fb,
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const struct drm_rect *clip);
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void drm_fb_xrgb8888_to_xrgb2101010_toio(void __iomem *dst, unsigned int dst_pitch,
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const void *vaddr, const struct drm_framebuffer *fb,
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const struct drm_rect *clip);
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void drm_fb_xrgb8888_to_gray8(void *dst, unsigned int dst_pitch, const void *vaddr,
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const struct drm_framebuffer *fb, const struct drm_rect *clip);
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int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_format,
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const void *vmap, const struct drm_framebuffer *fb,
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const struct drm_rect *rect);
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void drm_fb_xrgb8888_to_mono(void *dst, unsigned int dst_pitch, const void *src,
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const struct drm_framebuffer *fb, const struct drm_rect *clip);
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#endif /* __LINUX_DRM_FORMAT_HELPER_H */
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