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[target][stm32746g] switch the LCD to 565 mode and remove the extraneous flush

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Turns out gfx_flush() already calls a cache flush, the flush callback was
apparently intended to be in case you need to initiate an update to the panel.
This commit is contained in:
Travis Geiselbrecht
2015-08-21 12:00:44 -07:00
parent 9e2bc8ebf0
commit 37969468f0
1 changed files with 11 additions and 20 deletions
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31
target/stm32746g-eval2/lcd.c
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@@ -107,6 +107,9 @@
#define LCD_FB_START_ADDRESS ((uint32_t)SDRAM_BASE)
//#define LCD_FB_START_ADDRESS ((uint32_t)EXT_SRAM_BASE)
//#define LCD_PIXEL_FORMAT LTDC_PIXEL_FORMAT_ARGB888
#define LCD_PIXEL_FORMAT LTDC_PIXEL_FORMAT_RGB565
static LTDC_HandleTypeDef hLtdcEval;
/* Default LCD configuration with LCD Layer 1 */
@@ -150,6 +153,10 @@ void BSP_LCD_SetYSize(uint32_t imageHeightPixels)
hLtdcEval.LayerCfg[ActiveLayer].ImageHeight = imageHeightPixels;
}
static size_t BSP_LCD_PixelSize(void)
{
return (hLtdcEval.LayerCfg[ActiveLayer].PixelFormat == LTDC_PIXEL_FORMAT_ARGB8888) ? 4 : 2;
}
/**
* @brief Initializes the LCD layers.
@@ -166,7 +173,7 @@ void BSP_LCD_LayerDefaultInit(uint16_t LayerIndex, uint32_t FB_Address)
layer_cfg.WindowX1 = BSP_LCD_GetXSize();
layer_cfg.WindowY0 = 0;
layer_cfg.WindowY1 = BSP_LCD_GetYSize();
layer_cfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB8888;
layer_cfg.PixelFormat = LCD_PIXEL_FORMAT;
layer_cfg.FBStartAdress = FB_Address;
layer_cfg.Alpha = 255;
layer_cfg.Alpha0 = 0;
@@ -373,7 +380,7 @@ uint8_t BSP_LCD_Init(void)
BSP_LCD_SelectLayer(0);
/* clear it out */
memset((void *)hLtdcEval.LayerCfg[ActiveLayer].FBStartAdress, 0, BSP_LCD_GetXSize() * BSP_LCD_GetYSize() * 4); // XXX hard coded size
memset((void *)hLtdcEval.LayerCfg[ActiveLayer].FBStartAdress, 0, BSP_LCD_GetXSize() * BSP_LCD_GetYSize() * BSP_LCD_PixelSize());
/* turn the display on */
BSP_LCD_DisplayOn();
@@ -382,38 +389,22 @@ uint8_t BSP_LCD_Init(void)
}
/* LK display api here */
static void display_flush(uint starty, uint endy)
{
if (endy <= starty)
return;
uint32_t xsize = BSP_LCD_GetXSize();
uint32_t ptr = hLtdcEval.LayerCfg[ActiveLayer].FBStartAdress + starty * xsize;
size_t len = (endy - starty) * xsize * 4;
/* flush the dirty cache lines for the updated region */
arch_clean_cache_range(ptr, len);
}
void display_get_info(struct display_info *info)
{
info->framebuffer = (void *)hLtdcEval.LayerCfg[ActiveLayer].FBStartAdress;
if (hLtdcEval.LayerCfg[ActiveLayer].PixelFormat == LTDC_PIXEL_FORMAT_ARGB8888) {
info->format = GFX_FORMAT_ARGB_8888;
} else if (hLtdcEval.LayerCfg[ActiveLayer].PixelFormat == LTDC_PIXEL_FORMAT_RGB888) {
info->format = GFX_FORMAT_RGB_x888;
} else if (hLtdcEval.LayerCfg[ActiveLayer].PixelFormat == LTDC_PIXEL_FORMAT_RGB565) {
info->format = GFX_FORMAT_RGB_565;
} else {
panic("unknown pixel format\n");
panic("unhandled pixel format\n");
info->format = GFX_FORMAT_MAX;
}
info->width = BSP_LCD_GetXSize();
info->height = BSP_LCD_GetYSize();
info->stride = BSP_LCD_GetXSize();
info->flush = &display_flush;
info->flush = NULL;
}