From 21a151a79d51839ab0a08a7e2ca2ee4c9f79ab1c Mon Sep 17 00:00:00 2001 From: Stephan Gerhold Date: Fri, 2 Jul 2021 19:21:56 +0200 Subject: video: Add simple driver for ST-Ericsson MCDE with pre-configured display The U-Boot port for ST-Ericsson Ux500 is currently only used on the "stemmy" board, where U-Boot runs after firmware that already sets up a boot splash screen. This means that the display is already on and we can just continue using it for U-Boot. Add a simple driver that simplifies this by reading the display configuration (e.g. screen size, bpp) from the hardware registers. It also checks the configured "source synchronization" - for some displays (usually DSI command mode displays) we need to explicitly trigger a software sync. This is done through the video_sync() callback that triggers the sync and wait for completion. Cc: Linus Walleij Signed-off-by: Stephan Gerhold Reviewed-by: Linus Walleij --- drivers/video/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/video/Kconfig') diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index b69ffca..e614a04 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -854,6 +854,18 @@ config VIDEO_DT_SIMPLEFB The video output is initialized by U-Boot, and kept by the kernel. +config VIDEO_MCDE_SIMPLE + bool "Simple driver for ST-Ericsson MCDE with preconfigured display" + depends on DM_VIDEO + help + Enables a simple display driver for ST-Ericsson MCDE + (Multichannel Display Engine), which reads the configuration from + the MCDE registers. + + This driver assumes that the display hardware has been initialized + before u-boot starts, and u-boot will simply render to the pre- + allocated frame buffer surface. + config OSD bool "Enable OSD support" depends on DM -- cgit v1.1