Commit 1ed5df1e authored by K900's avatar K900
Browse files

linux/common-config: replace simplefb with simpledrm 

Arch and Fedora have been shipping it for a while now, we should
probably join them in the happy non-fbdev future. Legacy fbdev
drivers are still enabled for now, so non-simpledrm-friendly
devices don't break.
parent cb39b353

pkgs/os-specific/linux/kernel/common-config.nix

+11 −7
Original line number Diff line number Diff line
@@ -392,8 +392,8 @@ let 
      FRAMEBUFFER_CONSOLE_ROTATION = yes;

      FRAMEBUFFER_CONSOLE_DETECT_PRIMARY = yes;

      FB_GEODE            = mkIf (stdenv.hostPlatform.system == "i686-linux") yes;

      # On 5.14 this conflicts with FB_SIMPLE.

      DRM_SIMPLEDRM = whenAtLeast "5.14" no;

      # Use simplefb on older kernels where we don't have simpledrm (enabled below)

      FB_SIMPLE           = whenOlder "5.15" yes;

      DRM_FBDEV_EMULATION = yes;

    };
@@ -409,10 +409,19 @@ let 
    video = let

      whenHasDevicePrivate = mkIf (!stdenv.isx86_32 && versionAtLeast version "5.1");

    in {

      # compile in DRM so simpledrm can load before initrd if necessary

      AGP = yes;

      DRM = yes;



      DRM_LEGACY = whenOlder "6.8" no;



      NOUVEAU_LEGACY_CTX_SUPPORT = whenBetween "5.2" "6.3" no;



      # Enable simpledrm and use it for generic framebuffer

      # Technically added in 5.14, but adding more complex configuration is not worth it

      DRM_SIMPLEDRM = whenAtLeast "5.15" yes;

      SYSFB_SIMPLEFB = whenAtLeast "5.15" yes;



      # Allow specifying custom EDID on the kernel command line

      DRM_LOAD_EDID_FIRMWARE = yes;

      VGA_SWITCHEROO         = yes; # Hybrid graphics support
@@ -1178,11 +1187,6 @@ let 
      CMA_DEBUGFS = yes;

      CMA_SYSFS = yes;



      # Many ARM SBCs hand off a pre-configured framebuffer.

      # This always can can be replaced by the actual native driver.

      # Keeping it a built-in ensures it will be used if possible.

      FB_SIMPLE = yes;



      # https://docs.kernel.org/arch/arm/mem_alignment.html

      # tldr:

      #  when buggy userspace code emits illegal misaligned LDM, STM,