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kernel-config: Drop FB

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In Linux 6.6 DRM_FBDEV_EMULATION no longer depends on FB, so we no
longer need to select FB (tested in a QEMU VM).

But if DRM is selected, we must select both DRM_FBDEV_EMULATION and
FRAMEBUFFER_CONSOLE or we'll see only blank screen.  And now
FRAMEBUFFER_CONSOLE is not selected by default, be warned!!
This commit is contained in:
Xi Ruoyao 2023-12-05 14:55:45 +08:00
parent 34774f4986
commit 981b9fa6a1
No known key found for this signature in database
GPG Key ID: ACAAD20E19E710E3
5 changed files with 43 additions and 20 deletions
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20
chapter10/kernel.xml
View File

@ -273,16 +273,18 @@
</varlistentry>
<varlistentry>
<term><parameter>Framebuffer Console support</parameter></term>
<term>
<parameter>
Enable legacy fbdev support for your modesetting driver
</parameter> and
<parameter>Framebuffer Console support</parameter>
</term>
<listitem>
<para>This is needed to display the Linux console on a frame
buffer device. To allow the kernel to print debug messages at an
early boot stage, it shouldn't be built as a kernel module
unless an initramfs will be used. And, if
<option>CONFIG_DRM</option> (Direct Rendering Manager) is enabled,
it's likely <option>CONFIG_DRM_FBDEV_EMULATION</option> (Enable
legacy fbdev support for your modesetting driver) should be
enabled as well.</para>
<para>These are needed to display the Linux console on a
GPU driven by a DRI (Direct Rendering Infrastructure) driver.
If <option>CONFIG_DRM</option> (Direct Rendering Manager) is
enabled, you should enable these two options as well or you'll see
a blank screen once the DRI driver is loaded.</para>
</listitem>
</varlistentry>

12
chapter10/kernel/systemd.toml
View File

@ -13,9 +13,7 @@ STACKPROTECTOR_STRONG='*'
UEVENT_HELPER=' '
DEVTMPFS='*'
DEVTMPFS_MOUNT='*'
FB='*'
FRAMEBUFFER_CONSOLE='*'
DRM=' *M'
AUDIT=' '
NET='*'
INET='*'
@ -28,3 +26,11 @@ TMPFS='*'
TMPFS_POSIX_ACL='*'
revision='systemd'
[DRM_FBDEV_EMULATION]
value = ' *'
comment = 'If [DRM] is selected as * or M, this must be selected'
[FRAMEBUFFER_CONSOLE]
value = ' *'
comment = 'If [DRM] is selected as * or M, this must be selected'

10
chapter10/kernel/systemd.xml
View File

@ -41,10 +41,14 @@
<emphasis role='blue'>F</emphasis>irmware Drivers ---&gt;
[*] <emphasis role='blue'>E</emphasis>xport DMI identification via sysfs to userspace [DMIID]
<emphasis role='blue'>G</emphasis>raphics support ---&gt;
<emphasis role='blue'>F</emphasis>rame buffer Devices ---&gt;
&lt;*&gt; <emphasis role='blue'>S</emphasis>upport for frame buffer device drivers ---&gt; [FB]
&lt; /*/M&gt; <emphasis role='blue'>D</emphasis>irect Rendering Manager (XFree86 4.1.0 and higher DRI support) ---&gt;
... [DRM]
# If [DRM] is selected as * or M, this must be selected:
[ /*] <emphasis role='blue'>E</emphasis>nable legacy fbdev support for your modesetting driver
... [DRM_FBDEV_EMULATION]
<emphasis role='blue'>C</emphasis>onsole display driver support ---&gt;
[*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]
# If [DRM] is selected as * or M, this must be selected:
[ /*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]
<emphasis role='blue'>F</emphasis>ile systems ---&gt;
[*] <emphasis role='blue'>I</emphasis>notify support for userspace [INOTIFY_USER]

11
chapter10/kernel/sysv.toml
View File

@ -12,7 +12,14 @@ STACKPROTECTOR_STRONG='*'
UEVENT_HELPER=' '
DEVTMPFS='*'
DEVTMPFS_MOUNT='*'
FB='*'
FRAMEBUFFER_CONSOLE='*'
DRM=' *M'
revision='sysv'
[DRM_FBDEV_EMULATION]
value = ' *'
comment = 'If [DRM] is selected as * or M, this must be selected'
[FRAMEBUFFER_CONSOLE]
value = ' *'
comment = 'If [DRM] is selected as * or M, this must be selected'

10
chapter10/kernel/sysv.xml
View File

@ -29,7 +29,11 @@
[*] <emphasis role='blue'>A</emphasis>utomount devtmpfs at /dev, after the kernel mounted the rootfs
... [DEVTMPFS_MOUNT]
<emphasis role='blue'>G</emphasis>raphics support ---&gt;
<emphasis role='blue'>F</emphasis>rame buffer Devices ---&gt;
&lt;*&gt; <emphasis role='blue'>S</emphasis>upport for frame buffer device drivers ---&gt; [FB]
&lt; /*/M&gt; <emphasis role='blue'>D</emphasis>irect Rendering Manager (XFree86 4.1.0 and higher DRI support) ---&gt;
... [DRM]
# If [DRM] is selected as * or M, this must be selected:
[ /*] <emphasis role='blue'>E</emphasis>nable legacy fbdev support for your modesetting driver
... [DRM_FBDEV_EMULATION]
<emphasis role='blue'>C</emphasis>onsole display driver support ---&gt;
[*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]</screen>
# If [DRM] is selected as * or M, this must be selected:
[ /*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]</screen>