diff options
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 15 | ||||
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/video/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/video/Makefile | 1 | ||||
| -rw-r--r-- | drivers/video/nomodeset.c (renamed from drivers/gpu/drm/drm_nomodeset.c) | 12 | ||||
| -rw-r--r-- | include/drm/drm_drv.h | 8 | ||||
| -rw-r--r-- | include/video/nomodeset.h | 8 |
9 files changed, 39 insertions, 19 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a465d5242774..88561b3ce28a 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3777,12 +3777,15 @@ shutdown the other cpus. Instead use the REBOOT_VECTOR irq. - nomodeset Disable kernel modesetting. DRM drivers will not perform - display-mode changes or accelerated rendering. Only the - system framebuffer will be available for use if this was - set-up by the firmware or boot loader. - - Useful as fallback, or for testing and debugging. + nomodeset Disable kernel modesetting. Most systems' firmware + sets up a display mode and provides framebuffer memory + for output. With nomodeset, DRM and fbdev drivers will + not load if they could possibly displace the pre- + initialized output. Only the system framebuffer will + be available for use. The respective drivers will not + perform display-mode changes or accelerated rendering. + + Useful as error fallback, or for testing and debugging. nomodule Disable module load diff --git a/MAINTAINERS b/MAINTAINERS index 178a7a383b5f..7dc3b719b2a2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6701,8 +6701,10 @@ F: drivers/gpu/drm/drm_aperture.c F: drivers/gpu/drm/tiny/ofdrm.c F: drivers/gpu/drm/tiny/simpledrm.c F: drivers/video/aperture.c +F: drivers/video/nomodeset.c F: include/drm/drm_aperture.h F: include/linux/aperture.h +F: include/video/nomodeset.h DRM DRIVER FOR SIS VIDEO CARDS S: Orphan / Obsolete diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 34f5a092c99e..722ded626399 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -8,7 +8,6 @@ menuconfig DRM tristate "Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)" depends on (AGP || AGP=n) && !EMULATED_CMPXCHG && HAS_DMA - select DRM_NOMODESET select DRM_PANEL_ORIENTATION_QUIRKS select HDMI select FB_CMDLINE @@ -19,6 +18,7 @@ menuconfig DRM # gallium uses SYS_kcmp for os_same_file_description() to de-duplicate # device and dmabuf fd. Let's make sure that is available for our userspace. select KCMP + select VIDEO_NOMODESET help Kernel-level support for the Direct Rendering Infrastructure (DRI) introduced in XFree86 4.0. If you say Y here, you need to select @@ -514,11 +514,6 @@ config DRM_EXPORT_FOR_TESTS config DRM_PANEL_ORIENTATION_QUIRKS tristate -# Separate option because nomodeset parameter is global and expected built-in -config DRM_NOMODESET - bool - default n - config DRM_LIB_RANDOM bool default n diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index c44a54cadb61..f92cd7892711 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -72,7 +72,6 @@ drm-$(CONFIG_DRM_PRIVACY_SCREEN) += \ drm_privacy_screen_x86.o obj-$(CONFIG_DRM) += drm.o -obj-$(CONFIG_DRM_NOMODESET) += drm_nomodeset.o obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o # diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 0587e21abad9..6d2fde6c5d11 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -11,6 +11,10 @@ config APERTURE_HELPERS Support tracking and hand-over of aperture ownership. Required by graphics drivers for firmware-provided framebuffers. +config VIDEO_NOMODESET + bool + default n + if HAS_IOMEM config HAVE_FB_ATMEL diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 5bb6b452cc83..a50eb528ed3c 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_APERTURE_HELPERS) += aperture.o obj-$(CONFIG_VGASTATE) += vgastate.o +obj-$(CONFIG_VIDEO_NOMODESET) += nomodeset.o obj-$(CONFIG_HDMI) += hdmi.o obj-$(CONFIG_VT) += console/ diff --git a/drivers/gpu/drm/drm_nomodeset.c b/drivers/video/nomodeset.c index f3978d5bd3a1..13cc8b719697 100644 --- a/drivers/gpu/drm/drm_nomodeset.c +++ b/drivers/video/nomodeset.c @@ -3,17 +3,19 @@ #include <linux/module.h> #include <linux/types.h> -static bool drm_nomodeset; +#include <video/nomodeset.h> -bool drm_firmware_drivers_only(void) +static bool video_nomodeset; + +bool video_firmware_drivers_only(void) { - return drm_nomodeset; + return video_nomodeset; } -EXPORT_SYMBOL(drm_firmware_drivers_only); +EXPORT_SYMBOL(video_firmware_drivers_only); static int __init disable_modeset(char *str) { - drm_nomodeset = true; + video_nomodeset = true; pr_warn("Booted with the nomodeset parameter. Only the system framebuffer will be available\n"); diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index f6159acb8856..700d3857e088 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -30,6 +30,8 @@ #include <linux/list.h> #include <linux/irqreturn.h> +#include <video/nomodeset.h> + #include <drm/drm_device.h> struct drm_file; @@ -602,6 +604,10 @@ static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev) int drm_dev_set_unique(struct drm_device *dev, const char *name); -extern bool drm_firmware_drivers_only(void); +/* TODO: Inline drm_firmware_drivers_only() in all its callers. */ +static inline bool drm_firmware_drivers_only(void) +{ + return video_firmware_drivers_only(); +} #endif diff --git a/include/video/nomodeset.h b/include/video/nomodeset.h new file mode 100644 index 000000000000..8f8688b8beab --- /dev/null +++ b/include/video/nomodeset.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: MIT */ + +#ifndef VIDEO_NOMODESET_H +#define VIDEO_NOMODESET_H + +bool video_firmware_drivers_only(void); + +#endif |