From 11e8f5fd223bd4d33fa10527bad3fe48469a15df Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 30 Apr 2021 12:58:35 +0200 Subject: drm: Add simpledrm driver The simpledrm driver is a DRM driver for simple-framebuffer framebuffers as provided by the kernel's boot code. This driver enables basic graphical output on many different graphics devices that are provided by the platform (e.g., EFI, VESA, embedded framebuffers). With the kernel's simple-framebuffer infrastructure, the kernel receives a pre-configured framebuffer from the system (i.e., firmware, boot loader). It creates a platform device to which simpledrm attaches. The system's framebuffer consists of a memory range, size and format. Based on these values, simpledrm creates a DRM devices. No actual modesetting is possible. A firmware framebuffer might also be specified via device-tree files. If no device platform data is given, try the DT device node. Make sure required hardware clocks and regulators are enabled while the firmware framebuffer is in use. The basic code has been taken from the simplefb driver and adapted to DRM. Clocks are released automatically via devres helpers. The drivers displays a console on simpledrm's framebuffer. The default framebuffer format is being used. v4: * disable simplefb if simpledrm has been selected (Maxime) v3: * add disable function that clears screen to black (Daniel) * set shadow buffering only for fbdev emulation * set platform-driver data during device creation v2: * rename driver to simpledrm * add dri-devel to MAINTAINERS entry * put native format first in primary-plane format list (Daniel) * inline simplekms_device_cleanup() (Daniel) * use helpers for shadow-buffered planes * fix whitespace errors * add Device Tree match table * clean-up parser wrappers * use strscpy() Signed-off-by: Thomas Zimmermann Reviewed-by: Daniel Vetter # fbdev support Acked-by: Maxime Ripard Tested-by: nerdopolis Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-5-tzimmermann@suse.de Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-6-tzimmermann@suse.de Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-7-tzimmermann@suse.de Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-8-tzimmermann@suse.de Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-9-tzimmermann@suse.de --- drivers/video/fbdev/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/video') diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index 4f02db65dede..5e1ad0c92bfc 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -2192,7 +2192,7 @@ config FB_HYPERV config FB_SIMPLE bool "Simple framebuffer support" - depends on (FB = y) + depends on (FB = y) && !DRM_SIMPLEDRM select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT -- cgit v1.2.3-59-g8ed1b