diff --git a/local/recipes/drivers/linux-kpi/source/src/c_headers/linux/amdgpu_stubs.h b/local/recipes/drivers/linux-kpi/source/src/c_headers/linux/amdgpu_stubs.h
index 234afdfa1a..c31618fda2 100644
--- a/local/recipes/drivers/linux-kpi/source/src/c_headers/linux/amdgpu_stubs.h
+++ b/local/recipes/drivers/linux-kpi/source/src/c_headers/linux/amdgpu_stubs.h
@@ -52,6 +52,8 @@ static inline u32 div64_u64_rem_u32(u64 dividend, u64 divisor, u32 *remainder) {
     return (u32)(dividend / divisor);
 }
 
+#define ilog2(n) ((unsigned int)(8 * sizeof(unsigned long long) - __builtin_clzll((n)) - 1))
+
 #define _THIS_IP_ ((void *)0)
 struct va_format {
     const char *fmt;
diff --git a/local/recipes/gpu/amdgpu/recipe.toml b/local/recipes/gpu/amdgpu/recipe.toml
index bc29b5ee9d..d6e37209fa 100644
--- a/local/recipes/gpu/amdgpu/recipe.toml
+++ b/local/recipes/gpu/amdgpu/recipe.toml
@@ -54,6 +54,8 @@ export CFLAGS="-std=gnu11 -D__redox__ -D__KERNEL__ -DCONFIG_DRM_AMDGPU -DCONFIG_
     -I${AMD_SRC}/display/dc/dcn301 \
     -I${AMD_SRC}/display/dc/dcn31 \
     -I${AMD_SRC}/display/dc/dcn32 \
+    -I${AMD_SRC}/display/dc/dpp \
+    -I${AMD_SRC}/display/dc/mmhubbub \
     -I${AMD_SRC}/display/modules \
     -I${AMD_SRC}/display/modules/freesync \
     -I${AMD_SRC}/display/modules/color \
@@ -71,13 +73,18 @@ export CFLAGS="-std=gnu11 -D__redox__ -D__KERNEL__ -DCONFIG_DRM_AMDGPU -DCONFIG_
 "${TARGET_CC}" -c ${CFLAGS} "${REDOX_GLUE}/amdgpu_redox_main.c" -o amdgpu_redox_main.o
 "${TARGET_CC}" -c ${CFLAGS} "${REDOX_GLUE}/redox_stubs.c" -o redox_stubs.o
 
-# Stage 2: DCN31 hardware display files (RDNA2 GPU — Navi21/22/23/24)
+# Stage 2: DCN hardware display files
 #
-# These DCN 3.1 hardware backend files have been proven to compile against
-# the linux-kpi compatibility headers. They form the minimal verified subset
-# of the imported Linux Display Core tree. Additional DCN revisions (dcn20,
-# dcn30, dcn32) will be added as their compile triage completes.
-DISPLAY_SRCS="${AMD_SRC}/display/dc/dcn31/dcn31_afmt.c
+# These DCN hardware backend files have been proven to compile against
+# the linux-kpi compatibility headers. DCN31 covers RDNA2 (Navi21-24),
+# DCN20 covers RDNA1 (Navi10/14/12), DCN30 covers additional RDNA2.
+DISPLAY_SRCS="${AMD_SRC}/display/dc/dcn20/dcn20_dwb.c
+${AMD_SRC}/display/dc/dcn20/dcn20_dwb_scl.c
+${AMD_SRC}/display/dc/dcn20/dcn20_vmid.c
+${AMD_SRC}/display/dc/dcn30/dcn30_afmt.c
+${AMD_SRC}/display/dc/dcn30/dcn30_mmhubbub.c
+${AMD_SRC}/display/dc/dcn30/dcn30_vpg.c
+${AMD_SRC}/display/dc/dcn31/dcn31_afmt.c
 ${AMD_SRC}/display/dc/dcn31/dcn31_vpg.c
 ${AMD_SRC}/display/dc/dcn31/dcn31_apg.c
 ${AMD_SRC}/display/dc/dcn31/dcn31_panel_cntl.c"