media: adds the feature of the amvdec ports are based on v4l2.[1/2]

PD#153299:
1. amports has v4l for video decoding implemented upstream.
2. Only the decoding of h264 has been implemented at the moment.
3. the maximun resolution supports 1080p currently.
4. it is nv12 that the canvas data format of the decoder output.
5. the detailed description can be referred to wiki.
wiki: Media/The_V4L2_Amvdec_Ports_Instructions

Change-Id: Ie19311e1f44ae53b491500be9903f3d82c83b800
Signed-off-by: Nanxin Qin <nanxin.qin@amlogic.com>

arch/arm64/boot/dts/amlogic/mesong12a.dtsi

@@ -1266,6 +1266,12 @@
 			"mailbox_2";
 	};
 
+	vcodec_dec {
+		compatible = "amlogic, vcodec-dec";
+		dev_name = "aml-vcodec-dec";
+		status = "okay";
+	};
+
 	amvenc_avc{
 		compatible = "amlogic, amvenc_avc";
 		dev_name = "amvenc_avc";

arch/arm64/boot/dts/amlogic/mesongxl.dtsi

@@ -171,6 +171,12 @@
 		reserve_mem_size = <0x00300000>;
 	};
 
+	vcodec_dec {
+		compatible = "amlogic, vcodec-dec";
+		dev_name = "aml-vcodec-dec";
+		status = "okay";
+	};
+
 	securitykey {
 		compatible = "aml, securitykey";
 		storage_query = <0x82000060>;

arch/arm64/boot/dts/amlogic/mesongxm.dtsi

@@ -288,6 +288,12 @@
 		reserve_mem_size = <0x00300000>;
 	};
 
+	vcodec_dec {
+		compatible = "amlogic, vcodec-dec";
+		dev_name = "aml-vcodec-dec";
+		status = "okay";
+	};
+
 	securitykey {
 		compatible = "aml, securitykey";
 		storage_query = <0x82000060>;

arch/arm64/boot/dts/amlogic/mesontxlx.dtsi

@@ -172,6 +172,12 @@
 		reserve_mem_size = <0x00300000>;
 	};
 
+	vcodec_dec {
+		compatible = "amlogic, vcodec-dec";
+		dev_name = "aml-vcodec-dec";
+		status = "okay";
+	};
+
 	securitykey {
 		compatible = "aml, securitykey";
 		status = "okay";

drivers/amlogic/media/common/codec_mm/codec_mm.c

@@ -137,6 +137,7 @@ struct codec_mm_mgt_s {
 	int alloced_sys_size;
 	int alloced_for_sc_size;
 	int alloced_for_sc_cnt;
+	int alloced_from_coherent;
 
 	int alloc_from_sys_pages_max;
 	int enable_kmalloc_on_nomem;
@@ -1352,6 +1353,83 @@ int codec_mm_get_reserved_size(void)
 }
 EXPORT_SYMBOL(codec_mm_get_reserved_size);
 
+struct device *v4l_get_dev_from_codec_mm(void)
+{
+	struct codec_mm_mgt_s *mgt = get_mem_mgt();
+
+	return mgt->dev;
+}
+EXPORT_SYMBOL(v4l_get_dev_from_codec_mm);
+
+struct codec_mm_s *v4l_reqbufs_from_codec_mm(const char *owner,
+	unsigned int addr, unsigned int size, unsigned int index)
+{
+	unsigned long flags;
+	struct codec_mm_mgt_s *mgt = get_mem_mgt();
+	struct codec_mm_s *mem = NULL;
+	int buf_size = PAGE_ALIGN(size);
+
+	mem = kzalloc(sizeof(struct codec_mm_s), GFP_KERNEL);
+	if (IS_ERR_OR_NULL(mem))
+		goto out;
+
+	mem->owner[0]    = owner;
+	mem->mem_handle  = NULL;
+	mem->buffer_size = buf_size;
+	mem->page_count  = buf_size / PAGE_SIZE;
+	mem->phy_addr    = addr;
+	mem->ins_buffer_id = index;
+	mem->alloced_jiffies = get_jiffies_64();
+	mem->from_flags
+		= AMPORTS_MEM_FLAGS_FROM_GET_FROM_COHERENT;
+
+	spin_lock_irqsave(&mgt->lock, flags);
+
+	mem->mem_id = mgt->global_memid++;
+	mgt->alloced_from_coherent += buf_size;
+	mgt->total_alloced_size += buf_size;
+	mgt->alloced_cma_size += buf_size;
+	list_add_tail(&mem->list, &mgt->mem_list);
+
+	spin_unlock_irqrestore(&mgt->lock, flags);
+
+	if (debug_mode & 0x20)
+		pr_info("%s alloc coherent size %d at %lx from %d.\n",
+			owner, buf_size, mem->phy_addr, mem->from_flags);
+out:
+	return mem;
+}
+EXPORT_SYMBOL(v4l_reqbufs_from_codec_mm);
+
+void v4l_freebufs_back_to_codec_mm(const char *owner, struct codec_mm_s *mem)
+{
+	unsigned long flags;
+	struct codec_mm_mgt_s *mgt = get_mem_mgt();
+
+	if (IS_ERR_OR_NULL(mem))
+		return;
+
+	if (!mem->owner[0] || strcmp(owner, mem->owner[0]) ||
+		!mem->buffer_size)
+		goto out;
+
+	spin_lock_irqsave(&mgt->lock, flags);
+
+	mgt->alloced_from_coherent -= mem->buffer_size;
+	mgt->total_alloced_size -= mem->buffer_size;
+	mgt->alloced_cma_size -= mem->buffer_size;
+	list_del(&mem->list);
+
+	spin_unlock_irqrestore(&mgt->lock, flags);
+
+	if (debug_mode & 0x20)
+		pr_info("%s free mem size %d at %lx from %d\n", mem->owner[0],
+			mem->buffer_size, mem->phy_addr, mem->from_flags);
+out:
+	kfree(mem);
+}
+EXPORT_SYMBOL(v4l_freebufs_back_to_codec_mm);
+
 /*
  *with_wait:
  *1: if no mem, do wait and free some cache.
@@ -1916,7 +1994,7 @@ static int codec_mm_probe(struct platform_device *pdev)
 	if (r == 0)
 		pr_debug("codec_mm reserved memory probed done\n");
 
-	pr_debug("codec_mm_probe ok\n");
+	pr_info("codec_mm_probe ok\n");
 
 	codec_mm_scatter_mgt_init();
 	codec_mm_keeper_mgr_init();

drivers/amlogic/media/common/v4l_util/Kconfig

@@ -4,6 +4,8 @@
 
 config AMLOGIC_VIDEOBUF_RESOURCE
 	bool "Amlogic V4L UTIL Support"
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
 	default n
 	help
 		Select to enable V4L UTIL support

include/linux/amlogic/media/codec_mm/codec_mm.h

@@ -96,6 +96,7 @@ struct codec_mm_s {
 #define AMPORTS_MEM_FLAGS_FROM_GET_FROM_CMA 4
 #define AMPORTS_MEM_FLAGS_FROM_GET_FROM_TVP 5
 #define AMPORTS_MEM_FLAGS_FROM_GET_FROM_CMA_RES 6
+#define AMPORTS_MEM_FLAGS_FROM_GET_FROM_COHERENT 7
 	int from_flags;
 	/*may can be shared on many user..*/
 	   /*decoder/di/ppmgr,*/
@@ -148,4 +149,10 @@ void *codec_mm_dma_alloc_coherent(const char *owner, int size,
 			dma_addr_t *dma_handle, gfp_t flag, int memflags);
 void codec_mm_dma_free_coherent(const char *owner, int size,
 			void *cpu_addr, dma_addr_t dma_handle, int memflags);
+
+struct device *v4l_get_dev_from_codec_mm(void);
+struct codec_mm_s *v4l_reqbufs_from_codec_mm(const char *owner,
+	unsigned int addr, unsigned int size, unsigned int index);
+void v4l_freebufs_back_to_codec_mm(const char *owner, struct codec_mm_s *mem);
+
 #endif

include/linux/amlogic/media/utils/amstream.h

@@ -230,6 +230,7 @@ enum FRAME_BASE_VIDEO_PATH {
 	FRAME_BASE_PATH_DI_AMVIDEO,
 	FRAME_BASE_PATH_AMVIDEO,
 	FRAME_BASE_PATH_AMVIDEO2,
+	FRAME_BASE_PATH_V4L_VIDEO,
 	FRAME_BASE_PATH_MAX
 };
 

include/linux/amlogic/media/vfm/vframe.h

@@ -75,6 +75,7 @@
 #define VFRAME_FLAG_ERROR_RECOVERY		8
 #define VFRAME_FLAG_SYNCFRAME			0x10
 #define VFRAME_FLAG_GAME_MODE		0x20
+#define VFRAME_FLAG_EMPTY_FRAME_V4L		0x80
 
 enum pixel_aspect_ratio_e {
 	PIXEL_ASPECT_RATIO_1_1,
@@ -256,6 +257,7 @@ struct vframe_s {
 	u32 next_vf_pts;
 	u32 disp_pts;
 	u64 disp_pts_us64;
+	u64 timestamp;
 	u32 flag;
 
 	u32 canvas0Addr;
@@ -346,6 +348,8 @@ struct vframe_s {
 	/*for MMU H265/VP9 compress header*/
 	void *mem_head_handle;
 	struct vframe_pic_mode_s pic_mode;
+
+	unsigned long v4l_mem_handle;
 } /*vframe_t */;
 
 #if 0