msm: camera: memmgr: Add 4K padding for shared buffers

Due LX7 cache requirement, buffers need 4K padding at the
end. Allocate accordingly, this is hidden from user mode
driver and umd never uses this extra 4K memory.

CRs-Fixed: 2722486
Change-Id: I3b327ab3615eee30d17c95e23703024ff7446648
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>

drivers/cam_req_mgr/cam_mem_mgr.h

@@ -74,6 +74,13 @@ struct cam_mem_buf_queue {
  * @alloc_profile_enable: Whether to enable alloc profiling
  * @dbg_buf_idx: debug buffer index to get usecases info
  * @force_cache_allocs: Force all internal buffer allocations with cache
+ * @need_shared_buffer_padding: Whether padding is needed for shared buffer
+ *                              allocations.
+ * @system_heap: Handle to system heap
+ * @system_uncached_heap: Handle to system uncached heap
+ * @camera_heap: Handle to camera heap
+ * @camera_uncached_heap: Handle to camera uncached heap
+ * @secure_display_heap: Handle to secure display heap
  */
 struct cam_mem_table {
 	struct mutex m_lock;
@@ -84,6 +91,7 @@ struct cam_mem_table {
 	bool alloc_profile_enable;
 	size_t dbg_buf_idx;
 	bool force_cache_allocs;
+	bool need_shared_buffer_padding;
 #if IS_REACHABLE(CONFIG_DMABUF_HEAPS)
 	struct dma_heap *system_heap;
 	struct dma_heap *system_uncached_heap;