[PATCH v4 2/3] sysfb: Enable boot time VESA graphic mode selection
From: Michal Suchanek <hidden>
Date: 2022-02-25 20:51:53
Also in:
dri-devel, linux-efi, lkml
Subsystem:
framebuffer layer, svga handling, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Helge Deller, Martin Mares, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Since switch to simplefb/simpledrm VESA graphic mode selection with vga=
kernel parameter is no longer available with legacy BIOS.
The x86 realmode boot code enables the VESA graphic modes when option
FB_BOOT_VESA_SUPPORT is enabled.
This option is selected by vesafb but not simplefb/simpledrm.
To enable use of VESA modes with simplefb in legacy BIOS boot mode drop
dependency of BOOT_VESA_SUPPORT on FB, also drop the FB_ prefix. Select
the option from sysfb rather than the drivers that depend on it.
The BOOT_VESA_SUPPORT is not specific to framebuffer but rather to x86
platform, move it from fbdev to x86 Kconfig.
Fixes: e3263ab389a7 ("x86: provide platform-devices for boot-framebuffers")
Signed-off-by: Michal Suchanek <redacted>
Acked-by: Borislav Petkov <redacted>
---
v2: Select BOOT_VESA_SUPPORT from simplefb rather than simpledrm. The
simpledrm driver uses the firmware provided video modes only indirectly
through simplefb, and both can be enabled independently.
v3: Move BOOT_VESA_SUPPORT from fbdev to x86
v4: Select BOOT_VESA_SUPPORT from sysfb rather than individial sysfb based drivers.
---
arch/x86/Kconfig | 6 ++++++
arch/x86/boot/video-vesa.c | 4 ++--
drivers/firmware/Kconfig | 1 +
drivers/video/fbdev/Kconfig | 12 ++----------
4 files changed, 11 insertions(+), 12 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 9f5bd41bf660..cceb1aab0486 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig@@ -942,6 +942,12 @@ config GART_IOMMU If unsure, say Y. +config BOOT_VESA_SUPPORT + bool + help + If true, at least one selected framebuffer driver can take advantage + of VESA video modes set at an early boot stage via the vga= parameter. + config MAXSMP bool "Enable Maximum number of SMP Processors and NUMA Nodes" depends on X86_64 && SMP && DEBUG_KERNEL
diff --git a/arch/x86/boot/video-vesa.c b/arch/x86/boot/video-vesa.c
index 7e185977a984..c2c6d35e3a43 100644
--- a/arch/x86/boot/video-vesa.c
+++ b/arch/x86/boot/video-vesa.c@@ -83,7 +83,7 @@ static int vesa_probe(void) (vminfo.memory_layout == 4 || vminfo.memory_layout == 6) && vminfo.memory_planes == 1) { -#ifdef CONFIG_FB_BOOT_VESA_SUPPORT +#ifdef CONFIG_BOOT_VESA_SUPPORT /* Graphics mode, color, linear frame buffer supported. Only register the mode if if framebuffer is configured, however,
@@ -121,7 +121,7 @@ static int vesa_set_mode(struct mode_info *mode) if ((vminfo.mode_attr & 0x15) == 0x05) { /* It's a supported text mode */ is_graphic = 0; -#ifdef CONFIG_FB_BOOT_VESA_SUPPORT +#ifdef CONFIG_BOOT_VESA_SUPPORT } else if ((vminfo.mode_attr & 0x99) == 0x99) { /* It's a graphics mode with linear frame buffer */ is_graphic = 1;
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 5265eca74ba1..be42ae6f079e 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig@@ -218,6 +218,7 @@ config QCOM_SCM_DOWNLOAD_MODE_DEFAULT config SYSFB bool + select BOOT_VESA_SUPPORT config SYSFB_SIMPLEFB bool "Mark VGA/VBE/EFI FB as generic system framebuffer"
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 907c305caf27..0e25434a71e1 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig@@ -66,13 +66,6 @@ config FB_DDC select I2C_ALGOBIT select I2C -config FB_BOOT_VESA_SUPPORT - bool - depends on FB - help - If true, at least one selected framebuffer driver can take advantage - of VESA video modes set at an early boot stage via the vga= parameter. - config FB_CFB_FILLRECT tristate depends on FB
@@ -627,7 +620,6 @@ config FB_VESA select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT - select FB_BOOT_VESA_SUPPORT select SYSFB help This is the frame buffer device driver for generic VESA 2.0
@@ -1053,7 +1045,7 @@ config FB_INTEL select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT - select FB_BOOT_VESA_SUPPORT if FB_INTEL = y + select BOOT_VESA_SUPPORT if FB_INTEL = y depends on !DRM_I915 help This driver supports the on-board graphics built in to the Intel
@@ -1380,7 +1372,7 @@ config FB_SIS select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT - select FB_BOOT_VESA_SUPPORT if FB_SIS = y + select BOOT_VESA_SUPPORT if FB_SIS = y select FB_SIS_300 if !FB_SIS_315 help This is the frame buffer device driver for the SiS 300, 315, 330
--
2.34.1