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.
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| @@ -43,8 +43,7 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for · 42 unmodified lines | ||
| 43 | 43 | const void *vmap, const struct drm_framebuffer *fb, |
| 44 | 44 | const struct drm_rect *rect); |
| 45 | 45 | |
| 46 | −void drm_fb_xrgb8888_to_mono_reversed(void *dst, unsigned int dst_pitch, const void *src, | |
| 47 | − const struct drm_framebuffer *fb, | |
| 48 | − const struct drm_rect *clip); | |
| 46 | +void drm_fb_xrgb8888_to_mono(void *dst, unsigned int dst_pitch, const void *src, | |
| 47 | + const struct drm_framebuffer *fb, const struct drm_rect *clip); | |
| 49 | 48 | |
| 50 | 49 | #endif /* __LINUX_DRM_FORMAT_HELPER_H */ |