diff options
Diffstat (limited to 'drivers/video/stm32/stm32_ltdc.c')
| -rw-r--r-- | drivers/video/stm32/stm32_ltdc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/video/stm32/stm32_ltdc.c b/drivers/video/stm32/stm32_ltdc.c index 6fd90e3391..4f60ba8ebe 100644 --- a/drivers/video/stm32/stm32_ltdc.c +++ b/drivers/video/stm32/stm32_ltdc.c @@ -495,6 +495,33 @@ static void stm32_ltdc_set_layer1(struct stm32_ltdc_priv *priv, ulong fb_addr) setbits_le32(priv->regs + LTDC_L1CR, LXCR_LEN); } +#if IS_ENABLED(CONFIG_TARGET_STM32F469_DISCOVERY) +static int stm32_ltdc_alloc_fb(struct udevice *dev) +{ + u32 sdram_size = gd->ram_size; + struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev); + phys_addr_t cpu; + dma_addr_t bus; + u64 dma_size; + int ret; + + ret = dev_get_dma_range(dev, &cpu, &bus, &dma_size); + if (ret) { + dev_err(dev, "failed to get dma address\n"); + return ret; + } + + uc_plat->base = bus + sdram_size - ALIGN(uc_plat->size, uc_plat->align); + return 0; +} +#else +static inline int stm32_ltdc_alloc_fb(struct udevice *dev) +{ + /* Delegate framebuffer allocation to video-uclass */ + return 0; +} +#endif + static int stm32_ltdc_probe(struct udevice *dev) { struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev); @@ -605,6 +632,10 @@ static int stm32_ltdc_probe(struct udevice *dev) priv->crop_h = timings.vactive.typ; priv->alpha = 0xFF; + ret = stm32_ltdc_alloc_fb(dev); + if (ret) + return ret; + dev_dbg(dev, "%dx%d %dbpp frame buffer at 0x%lx\n", timings.hactive.typ, timings.vactive.typ, VNBITS(priv->l2bpp), uc_plat->base); |