guix-packages/ambrevar/linux-custom: Add linux-firmware-amdgpu

.guix-packages/ambrevar/linux-custom.scm

@@ -22,8 +22,8 @@
         "linux-" version ".tar.xz"))
       (sha256
        (base32
-        ;; 4.20.3
-        "0ibz33xgmvyvaql2jbl9kagv13nar9pjar7pawxyga04hh9bvhdr"))))
+        ;; 4.20.5
+        "057200c6wki2k29sp93gnmsq3pxjq5hs9pd2ncr66yll9abrd3gz"))))
     ;; (native-inputs
     ;;  `(("kconfig" ,(local-file "./linux-laptop.conf"))
     ;;    ,@(alist-delete "kconfig" (package-native-inputs linux-libre))))
@@ -97,3 +97,26 @@
     (description "Non-free iwlwifi firmware")
     (license (license:non-copyleft
               "https://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/tree/LICENCE.iwlwifi_firmware?id=HEAD"))))
+
+(define-public linux-firmware-amdgpu
+  (package
+    (name "linux-firmware-amdgpu")
+    (version (linux-firmware-version))
+    (source (linux-firmware-source version))
+    (build-system trivial-build-system)
+    (arguments
+     `(#:modules ((guix build utils))
+       #:builder (begin
+                   (use-modules (guix build utils))
+                   (let* ((source (assoc-ref %build-inputs "source"))
+                         (fw-dir (string-append %output "/lib/firmware/"))
+                         (bin-dir (string-append fw-dir "/amdgpu")))
+                     (mkdir-p bin-dir)
+                     (copy-recursively (string-append source "/amdgpu") bin-dir)
+                     (install-file (string-append source "/LICENSE.amdgpu") fw-dir)
+                     #t))))
+    (home-page "http://support.amd.com/en-us/download/linux")
+    (synopsis "Non-free firmware for AMD graphics chips")
+    (description "Non-free firmware for AMD graphics chips.")
+    (license (license:non-copyleft
+              "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/LICENSE.amdgpu"))))