Hi,
On Fri, 28 Aug 2020 10:44:55 +0000 Trommel, Kees (Contractor) kees.trommel.contractor@draeger.com wrote:
Hi Agust,
The latest version of the U-Boot does not support conversion from 24BPP BMP to a 16BPP 565RGB encoded frame buffer. It uses always 555RGB encoding (see function video_bmp_display in video_bmp.c). Older versions of the U-Boot (e.g. 2015.04) supported this because the platform specific device driver passed not only the BPP but also the encoding.
in recent U-Boot we do not use old cfb_console driver which supported 24bpp bitmaps. The DM video console driver still dosn't support some framebuffer/bitmap BPP combinations, or maybe your board config file does not define CONFIG_BMP_24BPP.
Do you know whether this lost support was done on purpose or lost by accident?
This is probably due to DM video conversion, not all BPP variants have been implemented with this yet.
I encountered this issue when trying to display a 24BPP BMP splash screen at an i.MX6 platform.
Did you define CONFIG_BMP_24BPP in your board config file? If not, could you do so and test the result? Thanks.
-- Anatolij