Disable SYSFB_SIMPLEFB by default. People reporting no display on radeon with 6.4.8+ and other issues with it enabled.

linux-tkg-config/prepare

@@ -882,6 +882,9 @@ _tkg_srcprep() {
   _disable "CPU_FREQ_DEFAULT_GOV_ONDEMAND" "CPU_FREQ_DEFAULT_GOV_CONSERVATIVE" "CPU_FREQ_DEFAULT_GOV_PERFORMANCE" "CPU_FREQ_DEFAULT_GOV_PERFORMANCE_NODEF"
   _module "BLK_DEV_LOOP"
 
+  # This leads to all kinds of issues everytime Arch enables it in defconfig. Let's disable it and be happy.
+  _disable "SYSFB_SIMPLEFB"
+
   # buggy project C/PSI interaction workaround
   if [ "${_cpusched}" = "pds" ] || [ "${_cpusched}" = "bmq" ]; then
     _enable "PSI_DEFAULT_DISABLED"

linux-tkg-patches/6.4/0012-misc-additions.patch

@@ -235,90 +235,3 @@ index 61949f374..11ef58204 100644
  
  		if (native_hba) {
  			if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA_TMF) {
-From e65a5fe09577d17e2fded61067f759f2bf02f6c0 Mon Sep 17 00:00:00 2001
-From: Javier Martinez Canillas <javierm@redhat.com>
-Date: Thu, 19 May 2022 14:40:07 +0200
-Subject: [PATCH] drivers/firmware: skip simpledrm if nvidia-drm.modeset=1 is
- set
-
-The Nvidia proprietary driver has some bugs that leads to issues if used
-with the simpledrm driver. The most noticeable is that does not register
-an emulated fbdev device.
-
-It just relies on a fbdev to be registered by another driver, that could
-be that could be attached to the framebuffer console. On UEFI machines,
-this is the efifb driver.
-
-This means that disabling the efifb driver will cause virtual consoles to
-not be present in the system when using the Nvidia driver. Legacy BIOS is
-not affected just because fbcon is not used there, but instead vgacon.
-
-Unless a VGA mode is specified using the vga= kernel command line option,
-in that case the vesafb driver is used instead and its fbdev attached to
-the fbcon.
-
-This is a problem because with CONFIG_SYSFB_SIMPLEFB=y, the sysfb platform
-code attempts to register a "simple-framebuffer" platform device (that is
-matched against simpledrm) and only registers either an "efi-framebuffer"
-or "vesa-framebuffer" if this fails to be registered due the video modes
-not being compatible.
-
-The Nvidia driver relying on another driver to register the fbdev is quite
-fragile, since it can't really assume those will stick around. For example
-there are patches posted to remove the EFI and VESA platform devices once
-a real DRM or fbdev driver probes.
-
-But in any case, moving to a simpledrm + emulated fbdev only breaks this
-assumption and causes users to not have VT if the Nvidia driver is used.
-
-So to prevent this, let's add a workaround and make the sysfb to skip the
-"simple-framebuffer" registration when nvidia-drm.modeset=1 option is set.
-
-This is quite horrible, but honestly I can't think of any other approach.
-
-For this to work, the CONFIG_FB_EFI and CONFIG_FB_VESA config options must
-be enabled besides CONFIG_DRM_SIMPLEDRM.
-
-Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
-(cherry picked from commit 811fe0e4dcfd86a0db5135d3bfef4936794efdb6)
-For: https://bugs.archlinux.org/task/73720
----
- drivers/firmware/sysfb.c | 18 +++++++++++++++++-
- 1 file changed, 17 insertions(+), 1 deletion(-)
-
-diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
-index 3c197db42c9d93..16e4a2e90fae2a 100644
---- a/drivers/firmware/sysfb.c
-+++ b/drivers/firmware/sysfb.c
-@@ -34,6 +34,22 @@
- #include <linux/screen_info.h>
- #include <linux/sysfb.h>
-
-+static int skip_simpledrm;
-+
-+static int __init simpledrm_disable(char *opt)
-+{
-+	if (!opt)
-+                return -EINVAL;
-+
-+	get_option(&opt, &skip_simpledrm);
-+
-+	if (skip_simpledrm)
-+		pr_info("The simpledrm driver will not be probed\n");
-+
-+	return 0;
-+}
-+early_param("nvidia-drm.modeset", simpledrm_disable);
-+
- static struct platform_device *pd;
- static DEFINE_MUTEX(disable_lock);
- static bool disabled;
-@@ -85,7 +101,7 @@ static __init int sysfb_init(void)
-
- 	/* try to create a simple-framebuffer device */
- 	compatible = sysfb_parse_mode(si, &mode);
--	if (compatible) {
-+	if (compatible && !skip_simpledrm) {
- 		pd = sysfb_create_simplefb(si, &mode);
- 		if (!IS_ERR(pd))
- 			goto unlock_mutex;