build/patch/kernel/archive/meson64-6.1/general-meson-vdec-improve-mmu-and-fbc-handling-.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: benjamin545 <benjamin545@gmail.com>
Date: Thu, 15 Jul 2021 16:32:39 -0400
Subject: WIP: drivers: meson: vdec: improve mmu and fbc handling and add 10
 bit handling

Unknown patch. From LibreELEC?
---
 drivers/staging/media/meson/vdec/codec_h264.c        |   3 +-
 drivers/staging/media/meson/vdec/codec_hevc_common.c | 164 ++++++----
 drivers/staging/media/meson/vdec/codec_hevc_common.h |   3 +-
 drivers/staging/media/meson/vdec/codec_vp9.c         |  36 +-
 drivers/staging/media/meson/vdec/esparser.c          |   1 +
 drivers/staging/media/meson/vdec/vdec.h              |   1 +
 drivers/staging/media/meson/vdec/vdec_helpers.c      |  46 ++-
 drivers/staging/media/meson/vdec/vdec_helpers.h      |  10 +-
 8 files changed, 163 insertions(+), 101 deletions(-)

diff --git a/drivers/staging/media/meson/vdec/codec_h264.c b/drivers/staging/media/meson/vdec/codec_h264.c
index c61128fc4bb9..d53c9a464bde 100644
--- a/drivers/staging/media/meson/vdec/codec_h264.c
+++ b/drivers/staging/media/meson/vdec/codec_h264.c
@@ -353,7 +353,8 @@ static void codec_h264_src_change(struct amvdec_session *sess)
 		frame_width, frame_height, crop_right, crop_bottom);
 
 	codec_h264_set_par(sess);
-	amvdec_src_change(sess, frame_width, frame_height, h264->max_refs + 5);
+	amvdec_src_change(sess, frame_width, frame_height,
+			  h264->max_refs + 5, 8);
 }
 
 /*
diff --git a/drivers/staging/media/meson/vdec/codec_hevc_common.c b/drivers/staging/media/meson/vdec/codec_hevc_common.c
index 0315cc0911cd..d6ed82dc93ca 100644
--- a/drivers/staging/media/meson/vdec/codec_hevc_common.c
+++ b/drivers/staging/media/meson/vdec/codec_hevc_common.c
@@ -30,8 +30,11 @@ const u16 vdec_hevc_parser_cmd[] = {
 void codec_hevc_setup_decode_head(struct amvdec_session *sess, int is_10bit)
 {
 	struct amvdec_core *core = sess->core;
-	u32 body_size = amvdec_am21c_body_size(sess->width, sess->height);
-	u32 head_size = amvdec_am21c_head_size(sess->width, sess->height);
+	u32 use_mmu = codec_hevc_use_mmu(core->platform->revision,
+					 sess->pixfmt_cap, is_10bit);
+	u32 body_size = amvdec_amfbc_body_size(sess->width, sess->height,
+					       is_10bit, use_mmu);
+	u32 head_size = amvdec_amfbc_head_size(sess->width, sess->height);
 
 	if (!codec_hevc_use_fbc(sess->pixfmt_cap, is_10bit)) {
 		/* Enable 2-plane reference read mode */
@@ -39,9 +42,17 @@ void codec_hevc_setup_decode_head(struct amvdec_session *sess, int is_10bit)
 		return;
 	}
 
+	/* enable mem saving mode for 8-bit */
+	if (!is_10bit)
+		amvdec_write_dos_bits(core, HEVC_SAO_CTRL5, BIT(9));
+	else
+		amvdec_clear_dos_bits(core, HEVC_SAO_CTRL5, BIT(9));
+
 	if (codec_hevc_use_mmu(core->platform->revision,
 			       sess->pixfmt_cap, is_10bit))
 		amvdec_write_dos(core, HEVCD_MPP_DECOMP_CTL1, BIT(4));
+	else if (!is_10bit)
+		amvdec_write_dos(core, HEVCD_MPP_DECOMP_CTL1, BIT(3));
 	else
 		amvdec_write_dos(core, HEVCD_MPP_DECOMP_CTL1, 0);
 
@@ -73,7 +84,7 @@ static void codec_hevc_setup_buffers_gxbb(struct amvdec_session *sess,
 
 		idx = vb->index;
 
-		if (codec_hevc_use_downsample(sess->pixfmt_cap, is_10bit))
+		if (codec_hevc_use_fbc(sess->pixfmt_cap, is_10bit))
 			buf_y_paddr = comm->fbc_buffer_paddr[idx];
 		else
 			buf_y_paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
@@ -114,8 +125,8 @@ static void codec_hevc_setup_buffers_gxl(struct amvdec_session *sess,
 {
 	struct amvdec_core *core = sess->core;
 	struct v4l2_m2m_buffer *buf;
-	u32 revision = core->platform->revision;
 	u32 pixfmt_cap = sess->pixfmt_cap;
+    const u32 revision = core->platform->revision;
 	int i;
 
 	amvdec_write_dos(core, HEVCD_MPP_ANC2AXI_TBL_CONF_ADDR,
@@ -127,12 +138,14 @@ static void codec_hevc_setup_buffers_gxl(struct amvdec_session *sess,
 		dma_addr_t buf_uv_paddr = 0;
 		u32 idx = vb->index;
 
-		if (codec_hevc_use_mmu(revision, pixfmt_cap, is_10bit))
-			buf_y_paddr = comm->mmu_header_paddr[idx];
-		else if (codec_hevc_use_downsample(pixfmt_cap, is_10bit))
-			buf_y_paddr = comm->fbc_buffer_paddr[idx];
-		else
-			buf_y_paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
+		if (codec_hevc_use_downsample(pixfmt_cap, is_10bit)) {
+			if (codec_hevc_use_mmu(revision, pixfmt_cap, is_10bit))
+				buf_y_paddr = comm->mmu_header_paddr[idx];
+			else
+				buf_y_paddr = comm->fbc_buffer_paddr[idx];
+		} else {
+ 			buf_y_paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
+		}
 
 		amvdec_write_dos(core, HEVCD_MPP_ANC2AXI_TBL_DATA,
 				 buf_y_paddr >> 5);
@@ -150,60 +163,67 @@ static void codec_hevc_setup_buffers_gxl(struct amvdec_session *sess,
 		amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR, 0);
 }
 
-void codec_hevc_free_fbc_buffers(struct amvdec_session *sess,
+void codec_hevc_free_mmu_headers(struct amvdec_session *sess,
 				 struct codec_hevc_common *comm)
 {
 	struct device *dev = sess->core->dev;
-	u32 am21_size = amvdec_am21c_size(sess->width, sess->height);
 	int i;
 
 	for (i = 0; i < MAX_REF_PIC_NUM; ++i) {
-		if (comm->fbc_buffer_vaddr[i]) {
-			dma_free_coherent(dev, am21_size,
-					  comm->fbc_buffer_vaddr[i],
-					  comm->fbc_buffer_paddr[i]);
-			comm->fbc_buffer_vaddr[i] = NULL;
+		if (comm->mmu_header_vaddr[i]) {
+			dma_free_coherent(dev, MMU_COMPRESS_HEADER_SIZE,
+					  comm->mmu_header_vaddr[i],
+					  comm->mmu_header_paddr[i]);
+			comm->mmu_header_vaddr[i] = NULL;
 		}
 	}
 }
-EXPORT_SYMBOL_GPL(codec_hevc_free_fbc_buffers);
+EXPORT_SYMBOL_GPL(codec_hevc_free_mmu_headers);
 
-static int codec_hevc_alloc_fbc_buffers(struct amvdec_session *sess,
+static int codec_hevc_alloc_mmu_headers(struct amvdec_session *sess,
 					struct codec_hevc_common *comm)
 {
 	struct device *dev = sess->core->dev;
 	struct v4l2_m2m_buffer *buf;
-	u32 am21_size = amvdec_am21c_size(sess->width, sess->height);
 
 	v4l2_m2m_for_each_dst_buf(sess->m2m_ctx, buf) {
 		u32 idx = buf->vb.vb2_buf.index;
 		dma_addr_t paddr;
-		void *vaddr = dma_alloc_coherent(dev, am21_size, &paddr,
-						 GFP_KERNEL);
+		void *vaddr = dma_alloc_coherent(dev, MMU_COMPRESS_HEADER_SIZE,
+						 &paddr, GFP_KERNEL);
 		if (!vaddr) {
-			codec_hevc_free_fbc_buffers(sess, comm);
+			codec_hevc_free_mmu_headers(sess, comm);
 			return -ENOMEM;
 		}
 
-		comm->fbc_buffer_vaddr[idx] = vaddr;
-		comm->fbc_buffer_paddr[idx] = paddr;
+		comm->mmu_header_vaddr[idx] = vaddr;
+		comm->mmu_header_paddr[idx] = paddr;
 	}
 
 	return 0;
 }
 
-void codec_hevc_free_mmu_headers(struct amvdec_session *sess,
+void codec_hevc_free_fbc_buffers(struct amvdec_session *sess,
 				 struct codec_hevc_common *comm)
 {
 	struct device *dev = sess->core->dev;
+	u32 use_mmu;
+	u32 am21_size;
 	int i;
 
+	use_mmu = codec_hevc_use_mmu(sess->core->platform->revision,
+					 sess->pixfmt_cap,
+					 sess->bitdepth == 10 ? 1 : 0);
+
+	am21_size = amvdec_amfbc_size(sess->width, sess->height,
+					  sess->bitdepth == 10 ? 1 : 0,  use_mmu);
+
 	for (i = 0; i < MAX_REF_PIC_NUM; ++i) {
-		if (comm->mmu_header_vaddr[i]) {
-			dma_free_coherent(dev, MMU_COMPRESS_HEADER_SIZE,
-					  comm->mmu_header_vaddr[i],
-					  comm->mmu_header_paddr[i]);
-			comm->mmu_header_vaddr[i] = NULL;
+		if (comm->fbc_buffer_vaddr[i]) {
+			dma_free_coherent(dev, am21_size,
+					  comm->fbc_buffer_vaddr[i],
+					  comm->fbc_buffer_paddr[i]);
+			comm->fbc_buffer_vaddr[i] = NULL;
 		}
 	}
 
@@ -213,33 +233,49 @@ void codec_hevc_free_mmu_headers(struct amvdec_session *sess,
 				  comm->mmu_map_paddr);
 		comm->mmu_map_vaddr = NULL;
 	}
+
+    codec_hevc_free_mmu_headers(sess, comm);
 }
-EXPORT_SYMBOL_GPL(codec_hevc_free_mmu_headers);
+EXPORT_SYMBOL_GPL(codec_hevc_free_fbc_buffers);
 
-static int codec_hevc_alloc_mmu_headers(struct amvdec_session *sess,
+static int codec_hevc_alloc_fbc_buffers(struct amvdec_session *sess,
 					struct codec_hevc_common *comm)
 {
 	struct device *dev = sess->core->dev;
 	struct v4l2_m2m_buffer *buf;
+	u32 use_mmu;
+	u32 am21_size;
+	const u32 revision = sess->core->platform->revision;
+	const u32 is_10bit = sess->bitdepth == 10 ? 1 : 0;
+	int ret;
 
-	comm->mmu_map_vaddr = dma_alloc_coherent(dev, MMU_MAP_SIZE,
-						 &comm->mmu_map_paddr,
-						 GFP_KERNEL);
-	if (!comm->mmu_map_vaddr)
-		return -ENOMEM;
+	use_mmu = codec_hevc_use_mmu(revision, sess->pixfmt_cap,
+					 is_10bit);
+
+	am21_size = amvdec_amfbc_size(sess->width, sess->height,
+					  is_10bit, use_mmu);
 
 	v4l2_m2m_for_each_dst_buf(sess->m2m_ctx, buf) {
 		u32 idx = buf->vb.vb2_buf.index;
 		dma_addr_t paddr;
-		void *vaddr = dma_alloc_coherent(dev, MMU_COMPRESS_HEADER_SIZE,
-						 &paddr, GFP_KERNEL);
+		void *vaddr = dma_alloc_coherent(dev, am21_size, &paddr,
+						 GFP_KERNEL);
 		if (!vaddr) {
-			codec_hevc_free_mmu_headers(sess, comm);
+			codec_hevc_free_fbc_buffers(sess, comm);
 			return -ENOMEM;
 		}
 
-		comm->mmu_header_vaddr[idx] = vaddr;
-		comm->mmu_header_paddr[idx] = paddr;
+		comm->fbc_buffer_vaddr[idx] = vaddr;
+		comm->fbc_buffer_paddr[idx] = paddr;
+	}
+
+	if (codec_hevc_use_mmu(revision, sess->pixfmt_cap, is_10bit) &&
+	    codec_hevc_use_downsample(sess->pixfmt_cap, is_10bit)) {
+		ret = codec_hevc_alloc_mmu_headers(sess, comm);
+		if (ret) {
+			codec_hevc_free_fbc_buffers(sess, comm);
+			return ret;
+		}
 	}
 
 	return 0;
@@ -250,21 +286,24 @@ int codec_hevc_setup_buffers(struct amvdec_session *sess,
 			     int is_10bit)
 {
 	struct amvdec_core *core = sess->core;
+    struct device *dev = core->dev;
 	int ret;
 
-	if (codec_hevc_use_downsample(sess->pixfmt_cap, is_10bit)) {
-		ret = codec_hevc_alloc_fbc_buffers(sess, comm);
-		if (ret)
-			return ret;
+	if (codec_hevc_use_mmu(core->platform->revision,
+			       sess->pixfmt_cap, is_10bit)) {
+		comm->mmu_map_vaddr = dma_alloc_coherent(dev, MMU_MAP_SIZE,
+							 &comm->mmu_map_paddr,
+							 GFP_KERNEL);
+		if (!comm->mmu_map_vaddr)
+			return -ENOMEM;
 	}
 
 	if (codec_hevc_use_mmu(core->platform->revision,
-			       sess->pixfmt_cap, is_10bit)) {
-		ret = codec_hevc_alloc_mmu_headers(sess, comm);
-		if (ret) {
-			codec_hevc_free_fbc_buffers(sess, comm);
-			return ret;
-		}
+			       sess->pixfmt_cap, is_10bit) ||
+	    codec_hevc_use_downsample(sess->pixfmt_cap, is_10bit)) {
+		ret = codec_hevc_alloc_fbc_buffers(sess, comm);
+		if (ret)
+ 			return ret;
 	}
 
 	if (core->platform->revision == VDEC_REVISION_GXBB)
@@ -278,19 +317,24 @@ EXPORT_SYMBOL_GPL(codec_hevc_setup_buffers);
 
 void codec_hevc_fill_mmu_map(struct amvdec_session *sess,
 			     struct codec_hevc_common *comm,
-			     struct vb2_buffer *vb)
+			     struct vb2_buffer *vb,
+			     u32 is_10bit)
 {
-	u32 size = amvdec_am21c_size(sess->width, sess->height);
-	u32 nb_pages = size / PAGE_SIZE;
+	u32 use_mmu;
+	u32 size;
+	u32 nb_pages;
 	u32 *mmu_map = comm->mmu_map_vaddr;
 	u32 first_page;
 	u32 i;
 
-	if (sess->pixfmt_cap == V4L2_PIX_FMT_NV12M)
-		first_page = comm->fbc_buffer_paddr[vb->index] >> PAGE_SHIFT;
-	else
-		first_page = vb2_dma_contig_plane_dma_addr(vb, 0) >> PAGE_SHIFT;
+	use_mmu = codec_hevc_use_mmu(sess->core->platform->revision,
+				    	 sess->pixfmt_cap, is_10bit);
+
+	size = amvdec_amfbc_size(sess->width, sess->height, is_10bit,
+				         use_mmu);
 
+	nb_pages = size / PAGE_SIZE;
+	first_page = comm->fbc_buffer_paddr[vb->index] >> PAGE_SHIFT;
 	for (i = 0; i < nb_pages; ++i)
 		mmu_map[i] = first_page + i;
 }
diff --git a/drivers/staging/media/meson/vdec/codec_hevc_common.h b/drivers/staging/media/meson/vdec/codec_hevc_common.h
index cf072b8a9da2..13f9f1d90a94 100644
--- a/drivers/staging/media/meson/vdec/codec_hevc_common.h
+++ b/drivers/staging/media/meson/vdec/codec_hevc_common.h
@@ -64,6 +64,7 @@ int codec_hevc_setup_buffers(struct amvdec_session *sess,
 
 void codec_hevc_fill_mmu_map(struct amvdec_session *sess,
 			     struct codec_hevc_common *comm,
-			     struct vb2_buffer *vb);
+			     struct vb2_buffer *vb,
+			     u32 is_10bit);
 
 #endif
diff --git a/drivers/staging/media/meson/vdec/codec_vp9.c b/drivers/staging/media/meson/vdec/codec_vp9.c
index 897f5d7a6aad..bfc312ec2a56 100644
--- a/drivers/staging/media/meson/vdec/codec_vp9.c
+++ b/drivers/staging/media/meson/vdec/codec_vp9.c
@@ -458,12 +458,6 @@ struct codec_vp9 {
 	struct list_head ref_frames_list;
 	u32 frames_num;
 
-	/* In case of downsampling (decoding with FBC but outputting in NV12M),
-	 * we need to allocate additional buffers for FBC.
-	 */
-	void      *fbc_buffer_vaddr[MAX_REF_PIC_NUM];
-	dma_addr_t fbc_buffer_paddr[MAX_REF_PIC_NUM];
-
 	int ref_frame_map[REF_FRAMES];
 	int next_ref_frame_map[REF_FRAMES];
 	struct vp9_frame *frame_refs[REFS_PER_FRAME];
@@ -901,11 +895,8 @@ static void codec_vp9_set_sao(struct amvdec_session *sess,
 		buf_y_paddr =
 		       vb2_dma_contig_plane_dma_addr(vb, 0);
 
-	if (codec_hevc_use_fbc(sess->pixfmt_cap, vp9->is_10bit)) {
-		val = amvdec_read_dos(core, HEVC_SAO_CTRL5) & ~0xff0200;
-		amvdec_write_dos(core, HEVC_SAO_CTRL5, val);
-		amvdec_write_dos(core, HEVC_CM_BODY_START_ADDR, buf_y_paddr);
-	}
+	if (codec_hevc_use_fbc(sess->pixfmt_cap, vp9->is_10bit))
+ 		amvdec_write_dos(core, HEVC_CM_BODY_START_ADDR, buf_y_paddr);
 
 	if (sess->pixfmt_cap == V4L2_PIX_FMT_NV12M) {
 		buf_y_paddr =
@@ -920,8 +911,12 @@ static void codec_vp9_set_sao(struct amvdec_session *sess,
 
 	if (codec_hevc_use_mmu(core->platform->revision, sess->pixfmt_cap,
 			       vp9->is_10bit)) {
-		amvdec_write_dos(core, HEVC_CM_HEADER_START_ADDR,
-				 vp9->common.mmu_header_paddr[vb->index]);
+		dma_addr_t header_adr;
+		if (codec_hevc_use_downsample(sess->pixfmt_cap, vp9->is_10bit))
+			header_adr = vp9->common.mmu_header_paddr[vb->index];
+		else
+			header_adr = vb2_dma_contig_plane_dma_addr(vb, 0);
+		amvdec_write_dos(core, HEVC_CM_HEADER_START_ADDR, header_adr);
 		/* use HEVC_CM_HEADER_START_ADDR */
 		amvdec_write_dos_bits(core, HEVC_SAO_CTRL5, BIT(10));
 	}
@@ -1148,9 +1143,13 @@ static void codec_vp9_set_mc(struct amvdec_session *sess,
 {
 	struct amvdec_core *core = sess->core;
 	u32 scale = 0;
+	u32 use_mmu;
 	u32 sz;
 	int i;
 
+	use_mmu = codec_hevc_use_mmu(core->platform->revision,
+					 sess->pixfmt_cap, vp9->is_10bit);
+
 	amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR, 1);
 	codec_vp9_set_refs(sess, vp9);
 	amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR,
@@ -1166,8 +1165,9 @@ static void codec_vp9_set_mc(struct amvdec_session *sess,
 		    vp9->frame_refs[i]->height != vp9->height)
 			scale = 1;
 
-		sz = amvdec_am21c_body_size(vp9->frame_refs[i]->width,
-					    vp9->frame_refs[i]->height);
+		sz = amvdec_amfbc_body_size(vp9->frame_refs[i]->width,
+					    vp9->frame_refs[i]->height,
+					    vp9->is_10bit, use_mmu);
 
 		amvdec_write_dos(core, VP9D_MPP_REFINFO_DATA,
 				 vp9->frame_refs[i]->width);
@@ -1283,7 +1283,8 @@ static void codec_vp9_process_frame(struct amvdec_session *sess)
 	if (codec_hevc_use_mmu(core->platform->revision, sess->pixfmt_cap,
 			       vp9->is_10bit))
 		codec_hevc_fill_mmu_map(sess, &vp9->common,
-					&vp9->cur_frame->vbuf->vb2_buf);
+					&vp9->cur_frame->vbuf->vb2_buf,
+					vp9->is_10bit);
 
 	intra_only = param->p.show_frame ? 0 : param->p.intra_only;
 
@@ -2132,7 +2133,8 @@ static irqreturn_t codec_vp9_threaded_isr(struct amvdec_session *sess)
 
 	codec_vp9_fetch_rpm(sess);
 	if (codec_vp9_process_rpm(vp9)) {
-		amvdec_src_change(sess, vp9->width, vp9->height, 16);
+		amvdec_src_change(sess, vp9->width, vp9->height, 16,
+				  vp9->is_10bit ? 10 : 8);
 
 		/* No frame is actually processed */
 		vp9->cur_frame = NULL;
diff --git a/drivers/staging/media/meson/vdec/esparser.c b/drivers/staging/media/meson/vdec/esparser.c
index 4b9ef97639c0..98f1efa4ad31 100644
--- a/drivers/staging/media/meson/vdec/esparser.c
+++ b/drivers/staging/media/meson/vdec/esparser.c
@@ -321,6 +321,7 @@ esparser_queue(struct amvdec_session *sess, struct vb2_v4l2_buffer *vbuf)
 		if (esparser_vififo_get_free_space(sess) < payload_size ||
 		    atomic_read(&sess->esparser_queued_bufs) >= num_dst_bufs)
 			return -EAGAIN;
+
 	} else if (esparser_vififo_get_free_space(sess) < payload_size) {
 		return -EAGAIN;
 	}
diff --git a/drivers/staging/media/meson/vdec/vdec.h b/drivers/staging/media/meson/vdec/vdec.h
index 0906b8fb5cc6..a48170fe4cff 100644
--- a/drivers/staging/media/meson/vdec/vdec.h
+++ b/drivers/staging/media/meson/vdec/vdec.h
@@ -244,6 +244,7 @@ struct amvdec_session {
 	u32 width;
 	u32 height;
 	u32 colorspace;
+	u32 bitdepth;
 	u8 ycbcr_enc;
 	u8 quantization;
 	u8 xfer_func;
diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.c b/drivers/staging/media/meson/vdec/vdec_helpers.c
index 7d2a75653250..d684057509bf 100644
--- a/drivers/staging/media/meson/vdec/vdec_helpers.c
+++ b/drivers/staging/media/meson/vdec/vdec_helpers.c
@@ -50,32 +50,40 @@ void amvdec_write_parser(struct amvdec_core *core, u32 reg, u32 val)
 }
 EXPORT_SYMBOL_GPL(amvdec_write_parser);
 
-/* 4 KiB per 64x32 block */
-u32 amvdec_am21c_body_size(u32 width, u32 height)
+/* AMFBC body is made out of 64x32 blocks with varying block size */
+u32 amvdec_amfbc_body_size(u32 width, u32 height, u32 is_10bit, u32 use_mmu)
 {
 	u32 width_64 = ALIGN(width, 64) / 64;
 	u32 height_32 = ALIGN(height, 32) / 32;
+	u32 blk_size = 4096;
 
-	return SZ_4K * width_64 * height_32;
+	if (!is_10bit) {
+		if (use_mmu)
+			blk_size = 3200;
+		else
+			blk_size = 3072;
+	}
+
+	return blk_size * width_64 * height_32;
 }
-EXPORT_SYMBOL_GPL(amvdec_am21c_body_size);
+EXPORT_SYMBOL_GPL(amvdec_amfbc_body_size);
 
 /* 32 bytes per 128x64 block */
-u32 amvdec_am21c_head_size(u32 width, u32 height)
+u32 amvdec_amfbc_head_size(u32 width, u32 height)
 {
 	u32 width_128 = ALIGN(width, 128) / 128;
 	u32 height_64 = ALIGN(height, 64) / 64;
 
 	return 32 * width_128 * height_64;
 }
-EXPORT_SYMBOL_GPL(amvdec_am21c_head_size);
+EXPORT_SYMBOL_GPL(amvdec_amfbc_head_size);
 
-u32 amvdec_am21c_size(u32 width, u32 height)
+u32 amvdec_amfbc_size(u32 width, u32 height, u32 is_10bit, u32 use_mmu)
 {
-	return ALIGN(amvdec_am21c_body_size(width, height) +
-		     amvdec_am21c_head_size(width, height), SZ_64K);
+	return ALIGN(amvdec_amfbc_body_size(width, height, is_10bit, use_mmu) +
+		     amvdec_amfbc_head_size(width, height), SZ_64K);
 }
-EXPORT_SYMBOL_GPL(amvdec_am21c_size);
+EXPORT_SYMBOL_GPL(amvdec_amfbc_size);
 
 static int canvas_alloc(struct amvdec_session *sess, u8 *canvas_id)
 {
@@ -440,7 +448,7 @@ void amvdec_set_par_from_dar(struct amvdec_session *sess,
 EXPORT_SYMBOL_GPL(amvdec_set_par_from_dar);
 
 void amvdec_src_change(struct amvdec_session *sess, u32 width,
-		       u32 height, u32 dpb_size)
+		       u32 height, u32 dpb_size, u32 bitdepth)
 {
 	static const struct v4l2_event ev = {
 		.type = V4L2_EVENT_SOURCE_CHANGE,
@@ -448,25 +456,27 @@ void amvdec_src_change(struct amvdec_session *sess, u32 width,
 
 	v4l2_ctrl_s_ctrl(sess->ctrl_min_buf_capture, dpb_size);
 
+	sess->bitdepth = bitdepth;
+
 	/*
 	 * Check if the capture queue is already configured well for our
-	 * usecase. If so, keep decoding with it and do not send the event
+	 * usecase. If so, keep decoding with it.
 	 */
 	if (sess->streamon_cap &&
 	    sess->width == width &&
 	    sess->height == height &&
 	    dpb_size <= sess->num_dst_bufs) {
 		sess->fmt_out->codec_ops->resume(sess);
-		return;
-	}
+	} else {
+		sess->status = STATUS_NEEDS_RESUME;
+		sess->changed_format = 0;
+ 	}
 
-	sess->changed_format = 0;
 	sess->width = width;
 	sess->height = height;
-	sess->status = STATUS_NEEDS_RESUME;
 
-	dev_dbg(sess->core->dev, "Res. changed (%ux%u), DPB size %u\n",
-		width, height, dpb_size);
+	dev_dbg(sess->core->dev, "Res. changed (%ux%u), DPB %u, bitdepth %u\n",
+		width, height, dpb_size, bitdepth);
 	v4l2_event_queue_fh(&sess->fh, &ev);
 }
 EXPORT_SYMBOL_GPL(amvdec_src_change);
diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.h b/drivers/staging/media/meson/vdec/vdec_helpers.h
index 4bf3e61d081b..1a711679d26a 100644
--- a/drivers/staging/media/meson/vdec/vdec_helpers.h
+++ b/drivers/staging/media/meson/vdec/vdec_helpers.h
@@ -27,9 +27,10 @@ void amvdec_clear_dos_bits(struct amvdec_core *core, u32 reg, u32 val);
 u32 amvdec_read_parser(struct amvdec_core *core, u32 reg);
 void amvdec_write_parser(struct amvdec_core *core, u32 reg, u32 val);
 
-u32 amvdec_am21c_body_size(u32 width, u32 height);
-u32 amvdec_am21c_head_size(u32 width, u32 height);
-u32 amvdec_am21c_size(u32 width, u32 height);
+/* Helpers for the Amlogic compressed framebuffer format */
+u32 amvdec_amfbc_body_size(u32 width, u32 height, u32 is_10bit, u32 use_mmu);
+u32 amvdec_amfbc_head_size(u32 width, u32 height);
+u32 amvdec_amfbc_size(u32 width, u32 height, u32 is_10bit, u32 use_mmu);
 
 /**
  * amvdec_dst_buf_done_idx() - Signal that a buffer is done decoding
@@ -77,9 +78,10 @@ void amvdec_set_par_from_dar(struct amvdec_session *sess,
  * @width: picture width detected by the hardware
  * @height: picture height detected by the hardware
  * @dpb_size: Decoded Picture Buffer size (= amount of buffers for decoding)
+ * @bitdepth: Bit depth (usually 10 or 8) of the coded content
  */
 void amvdec_src_change(struct amvdec_session *sess, u32 width,
-		       u32 height, u32 dpb_size);
+		       u32 height, u32 dpb_size, u32 bitdepth);
 
 /**
  * amvdec_abort() - Abort the current decoding session
-- 
Armbian