Update XRGB8888-to-MONO conversion to support struct iosys_map and convert all users. Although these are single-plane color formats, the new interface supports multi-plane formats for consistency with drm_fb_blit().
v2: * rebase after renaming CMA helpers to DMA helpers * update documentation (Sam) Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de> Reviewed-by: Sam Ravnborg <s...@ravnborg.org> --- drivers/gpu/drm/drm_format_helper.c | 56 +++++++++++++++++++---------- drivers/gpu/drm/solomon/ssd130x.c | 7 ++-- drivers/gpu/drm/tiny/repaper.c | 6 +++- include/drm/drm_format_helper.h | 5 +-- 4 files changed, 49 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 890370c0424f..53a313f83dc2 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -753,46 +753,64 @@ static void drm_fb_gray8_to_mono_line(void *dbuf, const void *sbuf, unsigned int /** * drm_fb_xrgb8888_to_mono - Convert XRGB8888 to monochrome - * @dst: monochrome destination buffer (0=black, 1=white) - * @dst_pitch: Number of bytes between two consecutive scanlines within dst - * @vaddr: XRGB8888 source buffer + * @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. + * @vmap: Array of XRGB8888 source buffers * @fb: DRM framebuffer * @clip: Clip rectangle area to copy * - * DRM doesn't have native monochrome support. - * Such drivers can announce the commonly supported XR24 format to userspace - * and use this function to convert to the native format. + * 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 @vmap 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. - * - * 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. */ -void drm_fb_xrgb8888_to_mono(void *dst, unsigned int dst_pitch, const void *vaddr, - const struct drm_framebuffer *fb, const struct drm_rect *clip) +void drm_fb_xrgb8888_to_mono(struct iosys_map *dst, const unsigned int *dst_pitch, + const struct iosys_map *vmap, 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 + }; 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 = vmap[0].vaddr; + unsigned int dst_pitch_0; unsigned int y; - u8 *mono = dst, *gray8; + 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) - dst_pitch = DIV_ROUND_UP(linepixels, 8); + if (!dst_pitch_0) + dst_pitch_0 = DIV_ROUND_UP(linepixels, 8); /* * The dma memory is write-combined so reads are uncached. @@ -817,7 +835,7 @@ void drm_fb_xrgb8888_to_mono(void *dst, unsigned int dst_pitch, const void *vadd 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; + mono += dst_pitch_0; } kfree(src32); diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c index e1ff683db12a..94d92b726c34 100644 --- a/drivers/gpu/drm/solomon/ssd130x.c +++ b/drivers/gpu/drm/solomon/ssd130x.c @@ -536,11 +536,11 @@ static void ssd130x_clear_screen(struct ssd130x_device *ssd130x) kfree(buf); } -static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_map *map, +static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_map *vmap, struct drm_rect *rect) { struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev); - void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */ + struct iosys_map dst; unsigned int dst_pitch; int ret = 0; u8 *buf = NULL; @@ -554,7 +554,8 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m if (!buf) return -ENOMEM; - drm_fb_xrgb8888_to_mono(buf, dst_pitch, vmap, fb, rect); + iosys_map_set_vaddr(&dst, buf); + drm_fb_xrgb8888_to_mono(&dst, &dst_pitch, vmap, fb, rect); ssd130x_update_rect(ssd130x, buf, rect); diff --git a/drivers/gpu/drm/tiny/repaper.c b/drivers/gpu/drm/tiny/repaper.c index 4cd24b54ac74..c4c1be3ac0b8 100644 --- a/drivers/gpu/drm/tiny/repaper.c +++ b/drivers/gpu/drm/tiny/repaper.c @@ -513,6 +513,8 @@ static int repaper_fb_dirty(struct drm_framebuffer *fb) { struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, 0); struct repaper_epd *epd = drm_to_epd(fb->dev); + unsigned int dst_pitch = 0; + struct iosys_map dst, vmap; struct drm_rect clip; int idx, ret = 0; u8 *buf = NULL; @@ -541,7 +543,9 @@ static int repaper_fb_dirty(struct drm_framebuffer *fb) if (ret) goto out_free; - drm_fb_xrgb8888_to_mono(buf, 0, dma_obj->vaddr, fb, &clip); + iosys_map_set_vaddr(&dst, buf); + iosys_map_set_vaddr(&vmap, dma_obj->vaddr); + drm_fb_xrgb8888_to_mono(&dst, &dst_pitch, &vmap, fb, &clip); drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index 68087c982497..1e1d8f356cc1 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -40,7 +40,8 @@ int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t d const struct iosys_map *vmap, const struct drm_framebuffer *fb, const struct drm_rect *rect); -void drm_fb_xrgb8888_to_mono(void *dst, unsigned int dst_pitch, const void *src, - const struct drm_framebuffer *fb, const struct drm_rect *clip); +void drm_fb_xrgb8888_to_mono(struct iosys_map *dst, const unsigned int *dst_pitch, + const struct iosys_map *vmap, const struct drm_framebuffer *fb, + const struct drm_rect *clip); #endif /* __LINUX_DRM_FORMAT_HELPER_H */ -- 2.37.1