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Fix the STM32LTDC driver DMA2D accelerated bitblit on STM32F7 platforms.

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This commit is contained in:
inmarket 2017-10-02 13:27:10 +10:00
parent cd4c389e48
commit 7ef1fa156c
3 changed files with 76 additions and 9 deletions
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2
changelog.txt
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@ -62,7 +62,7 @@ NOTE: Alpha support in RGB888 requies an alpha capable display (STM32LTDC 2nd d
NOTE: Alpha support in RGB888 is NOT the standard ARGB8888 format. Only use AHTML2COLOR() and ARGB2COLOR() to create alpha colors.
FEATURE: Added nullpointer checks to GDISP image functions (with new error code GDISP_IMAGE_ERR_NULLPOINTER)
FIX: Add cache flushing to the ChibiOS FATFS/PETITFS block drivers. Needed for STM32F7 chips. This should really be in the ChibiOS DMA routines.
FIX: Add cache flushing to enable DMA2D accelerated bitblits in the STM32LTDC driver on the STM32F7 cpu.
*** Release 2.7 ***
FEATURE: Added EXC7200 driver

74
drivers/gdisp/STM32LTDC/gdisp_lld_STM32LTDC.c
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@ -29,12 +29,21 @@
#ifndef LTDC_NO_CLOCK_INIT
#define LTDC_NO_CLOCK_INIT FALSE
#endif
#ifndef LTDC_DMA_CACHE_FLUSH
#define LTDC_DMA_CACHE_FLUSH FALSE
#endif
#include "stm32_ltdc.h"
#if LTDC_USE_DMA2D
#include "stm32_dma2d.h"
#if defined(STM32F7) || defined(STM32F746xx)
#undef LTDC_DMA_CACHE_FLUSH
#define LTDC_DMA_CACHE_FLUSH TRUE
#endif
#endif
typedef struct ltdcLayerConfig {
// Frame
@ -406,6 +415,15 @@ LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay* g) {
#endif
#if LTDC_USE_DMA2D
#if LTDC_DMA_CACHE_FLUSH
#if defined(__CC_ARM)
#define __DSB() __dsb(0xF)
#else // GCC like
#define __DSB() __ASM volatile ("dsb 0xF":::"memory")
#endif
#endif
static void dma2d_init(void) {
// Enable DMA2D clock
RCC->AHB1ENR |= RCC_AHB1ENR_DMA2DEN;
@ -462,6 +480,27 @@ LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay* g) {
shape = (g->p.cx << 16) | (g->p.cy);
#endif
#if LTDC_DMA_CACHE_FLUSH
{
// This is slightly less than optimal as we flush the whole line in the source and destination image
// instead of just the cx portion but this saves us having to iterate over each line.
uint32_t f, e;
// Data memory barrier
__DSB();
// Flush then invalidate the destination area
e = pos + (g->p.cy > 1 ? ((uint32_t)((ltdcLayerConfig *)g->priv)->pitch*(shape & 0xFFFF)) : ((shape>>16)*LTDC_PIXELBYTES));
for(f=(pos & ~31); f < e; f += 32) {
SCB->DCCIMVAC = f;
SCB->DCIMVAC = f;
}
// Data memory barrier
__DSB();
}
#endif
// Wait until DMA2D is ready
while(DMA2D->CR & DMA2D_CR_START);
@ -501,15 +540,46 @@ LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay* g) {
#if GDISP_HARDWARE_BITFILLS
// Uses p.x,p.y p.cx,p.cy p.x1,p.y1 (=srcx,srcy) p.x2 (=srccx), p.ptr (=buffer)
LLDSPEC void gdisp_lld_blit_area(GDisplay* g) {
uint32_t srcstart, dststart;
srcstart = LTDC_PIXELBYTES * ((uint32_t)g->p.x2 * g->p.y1 * + g->p.x1) + (uint32_t)g->p.ptr;
dststart = (uint32_t)PIXEL_ADDR(g, PIXIL_POS(g, g->p.x, g->p.y));
#if LTDC_DMA_CACHE_FLUSH
{
// This is slightly less than optimal as we flush the whole line in the source and destination image
// instead of just the cx portion but this saves us having to iterate over each line.
uint32_t f, e;
// Data memory barrier
__DSB();
// Flush the source area
e = srcstart + (g->p.cy > 1 ? ((uint32_t)g->p.x2*g->p.cy) : (uint32_t)g->p.cx)*LTDC_PIXELBYTES;
for(f=(srcstart & ~31); f < e; f += 32)
SCB->DCCIMVAC = f;
// Flush then invalidate the destination area
e = dststart + (g->p.cy > 1 ? ((uint32_t)((ltdcLayerConfig *)g->priv)->pitch*g->p.cy) : ((uint32_t)g->p.cx*LTDC_PIXELBYTES));
for(f=(dststart & ~31); f < e; f += 32) {
SCB->DCCIMVAC = f;
SCB->DCIMVAC = f;
}
// Data memory barrier
__DSB();
}
#endif
// Wait until DMA2D is ready
while(DMA2D->CR & DMA2D_CR_START);
// Source setup
DMA2D->FGMAR = LTDC_PIXELBYTES * (g->p.y1 * g->p.x2 + g->p.x1) + (uint32_t)g->p.ptr;
DMA2D->FGMAR = srcstart;
DMA2D->FGOR = g->p.x2 - g->p.cx;
// Output setup
DMA2D->OMAR = (uint32_t)PIXEL_ADDR(g, PIXIL_POS(g, g->p.x, g->p.y));
DMA2D->OMAR = dststart;
DMA2D->OOR = g->g.Width - g->p.cx;
DMA2D->NLR = (g->p.cx << 16) | (g->p.cy);

9
drivers/gdisp/STM32LTDC/gdisp_lld_config.h
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@ -42,12 +42,9 @@
// Accelerated bitfills are also possible but only for GDISP_ROTATE_0
// and if no color translation is required (for now)
// Oops - this is not working and adds little performance benefit
// so we will just disable it for the near future.
// #if !GDISP_NEED_CONTROL && !defined(GDISP_PIXELFORMAT)
// #define GDISP_HARDWARE_BITFILLS TRUE
// #endif
#if !GDISP_NEED_CONTROL && !defined(GDISP_PIXELFORMAT)
#define GDISP_HARDWARE_BITFILLS TRUE
#endif
#endif /* GDISP_USE_DMA2D */
#endif /* GFX_USE_GDISP */