diff options
| author | Patrick Delaunay <[email protected]> | 2021-11-15 16:32:22 +0100 |
|---|---|---|
| committer | Patrice Chotard <[email protected]> | 2021-11-30 16:43:28 +0100 |
| commit | 6cdeb323b89adb3649659d32a52eeaecb1e96086 (patch) | |
| tree | cfac8ece2cd3961d8cc15a684e55daa811fe5984 | |
| parent | 77debf61ef271957515de00a78ed5486c164f850 (diff) | |
video: stm32: stm32_ltdc: align framebuffer on 2MB
Align the framebuffer size on MMU_SECTION_SIZE in kernel, = max 2MB for
LPAE for armV7, to avoid issue with the simple frame buffer activation,
when U-Boot add a reserved memory in the kernel device tree to preserve
the splash screen until Linux driver initialization.
See Linux documentation for details:
Documentation/devicetree/bindings/display/simple-framebuffer.yaml
Signed-off-by: Patrick Delaunay <[email protected]>
Reviewed-by: Patrice Chotard <[email protected]>
| -rw-r--r-- | drivers/video/stm32/stm32_ltdc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/video/stm32/stm32_ltdc.c b/drivers/video/stm32/stm32_ltdc.c index 65c882d9f12..87e5fd54d9a 100644 --- a/drivers/video/stm32/stm32_ltdc.c +++ b/drivers/video/stm32/stm32_ltdc.c @@ -459,7 +459,10 @@ static int stm32_ltdc_bind(struct udevice *dev) uc_plat->size = CONFIG_VIDEO_STM32_MAX_XRES * CONFIG_VIDEO_STM32_MAX_YRES * (CONFIG_VIDEO_STM32_MAX_BPP >> 3); - dev_dbg(dev, "frame buffer max size %d bytes\n", uc_plat->size); + /* align framebuffer on kernel MMU_SECTION_SIZE = max 2MB for LPAE */ + uc_plat->align = SZ_2M; + dev_dbg(dev, "frame buffer max size %d bytes align %x\n", + uc_plat->size, uc_plat->align); return 0; } |