To reduce GPU bandwidth, add RBC(Render Buffer Compression) Support

aosp_diff/preliminary/external/drm_hwcomposer/0010-RBC-Render-Buffer-Compression-Support.patch

@@ -0,0 +1,48 @@
+From 6425bc97bde1b8f02a8eb4c02155c715a7ac7330 Mon Sep 17 00:00:00 2001
+From: "Li, HaihongX" <[email protected]>
+Date: Fri, 1 Apr 2022 11:16:07 +0800
+Subject: [PATCH] RBC(Render Buffer Compression) Support
+
+Set bo->prime_fds[1] = handle->data[0] for rbc supporting
+if modifier is I915_FORMAT_MOD_Y_TILED_CCSi or
+I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS.
+
+Tracked-On: OAM-101691
+Signed-off-by: Li, HaihongX <[email protected]>
+---
+ bufferinfo/BufferInfoMapperMetadata.cpp | 6 +++++-
+ include/drmhwcomposer.h                 | 1 +
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/bufferinfo/BufferInfoMapperMetadata.cpp b/bufferinfo/BufferInfoMapperMetadata.cpp
+index 23a9072..a251c0d 100644
+--- a/bufferinfo/BufferInfoMapperMetadata.cpp
++++ b/bufferinfo/BufferInfoMapperMetadata.cpp
+@@ -51,7 +51,11 @@ BufferInfoMapperMetadata::GetFds(buffer_handle_t handle, hwc_drm_bo_t *bo) {
+
+   if (num_fds >= 1 && num_fds <= 2) {
+     if (IsDrmFormatRgb(bo->format)) {
+-      bo->prime_fds[0] = handle->data[0];
++      if (bo->modifiers[0] == I915_FORMAT_MOD_Y_TILED_CCS ||
++          bo->modifiers[0] == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS)
++        bo->prime_fds[0] = bo->prime_fds[1] = handle->data[0];
++      else
++        bo->prime_fds[0] = handle->data[0];
+     } else {
+       bo->prime_fds[0] = bo->prime_fds[1] = bo->prime_fds[2] = handle->data[0];
+     }
+diff --git a/include/drmhwcomposer.h b/include/drmhwcomposer.h
+index 6528f86..181a7a8 100644
+--- a/include/drmhwcomposer.h
++++ b/include/drmhwcomposer.h
+@@ -29,6 +29,7 @@
+ #include "utils/UniqueFd.h"
+
+ #define DRM_FORMAT_NV12_Y_TILED_INTEL fourcc_code('9', '9', '9', '6')
++#define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS fourcc_mod_code(INTEL, 6)
+ namespace android {
+
+ class DrmFbIdHandle;
+-- 
+2.33.1
+