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STM32LTDC: Fix bug in DMA2D blitting

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Thanks to @nathanwiebe for reporting this:
https://community.ugfx.io/topic/3159-a-bug-in-the-stm32-ltdc-driver
This commit is contained in:
Joel Bodenmann 2021-08-18 20:58:53 +02:00
parent 853f2cba98
commit 888c7e8640
2 changed files with 2 additions and 1 deletions
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1
changelog.txt
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@ -16,6 +16,7 @@ CHANGE: STM32LTDC driver: Rename ALLOW_2ND_LAYER to STM32LTDC_USE_LAYER2.
CHANGE: STM32LTDC driver: Rename LTDC_DMA_CACHE_FLUSH to STM32LTDC_DMA_CACHE_FLUSH.
CHANGE: STM32LTDC driver: Rename GDISP_LTDC_USE_RGB565 to STM32LTDC_USE_RGB565.
FEATURE: STM32LTDC driver: Support double buffering. This introduces STM32LTDC_USE_DOUBLEBUFFERING.
FIX: STM32LTDC driver: Fix bug in gdisp_lld_blit_area() which affected blits with source coordinates other than (0, 0).
FIX: Improve /demos/benchmarks/rectangles

2
drivers/gdisp/STM32LTDC/gdisp_lld_STM32LTDC.c
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@ -564,7 +564,7 @@ LLDSPEC gColor gdisp_lld_get_pixel_color(GDisplay* g) {
LLDSPEC void gdisp_lld_blit_area(GDisplay* g) {
gU32 srcstart, dststart;
srcstart = LTDC_PIXELBYTES * ((gU32)g->p.x2 * g->p.y1 * + g->p.x1) + (gU32)g->p.ptr;
srcstart = LTDC_PIXELBYTES * ((gU32)g->p.x2 * g->p.y1 + g->p.x1) + (gU32)g->p.ptr;
dststart = (gU32)PIXEL_ADDR(g, PIXEL_POS(g, g->p.x, g->p.y));
#if STM32LTDC_DMA_CACHE_FLUSH