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drm/repaper: Use format helper for xrgb8888 to monochrome conversion

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There is now a drm_fb_xrgb8888_to_mono_reversed() helper function to do
format conversion from XRGB8888 to reversed monochrome.

Use that helper and remove the open coded version in the repaper driver.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220223193735.213185-1-javierm@redhat.com
This commit is contained in:
Javier Martinez Canillas 2022-02-23 20:37:35 +01:00
parent 94fa115f7b
commit 24c6bedefb
No known key found for this signature in database
GPG Key ID: C751E590D63F3D69
1 changed files with 1 additions and 23 deletions

24
drivers/gpu/drm/tiny/repaper.c

@ -508,26 +508,6 @@ static void repaper_get_temperature(struct repaper_epd *epd)
epd->factored_stage_time = epd->stage_time * factor10x / 10;
}
static void repaper_gray8_to_mono_reversed(u8 *buf, u32 width, u32 height)
{
u8 *gray8 = buf, *mono = buf;
int y, xb, i;
for (y = 0; y < height; y++)
for (xb = 0; xb < width / 8; xb++) {
u8 byte = 0x00;
for (i = 0; i < 8; i++) {
int x = xb * 8 + i;
byte >>= 1;
if (gray8[y * width + x] >> 7)
byte |= BIT(7);
}
*mono++ = byte;
}
}
static int repaper_fb_dirty(struct drm_framebuffer *fb)
{
struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
@ -560,12 +540,10 @@ static int repaper_fb_dirty(struct drm_framebuffer *fb)
if (ret)
goto out_free;
drm_fb_xrgb8888_to_gray8(buf, 0, cma_obj->vaddr, fb, &clip);
drm_fb_xrgb8888_to_mono_reversed(buf, 0, cma_obj->vaddr, fb, &clip);
drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
repaper_gray8_to_mono_reversed(buf, fb->width, fb->height);
if (epd->partial) {
repaper_frame_data_repeat(epd, buf, epd->current_frame,
REPAPER_NORMAL);