bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 0 insertions, 308 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Use-dummy-buffer-if-none-have-b.patch b/target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Use-dummy-buffer-if-none-have-b.patch
deleted file mode 100644
index 836ced8a04..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Use-dummy-buffer-if-none-have-b.patch
+++ /dev/null
@@ -1,308 +0,0 @@
-From 0eb6753788616ffed17a0484a14fd7d3df2a2a05 Mon Sep 17 00:00:00 2001
-From: Naushir Patuck <naush@raspberrypi.com>
-Date: Thu, 2 Apr 2020 16:08:51 +0100
-Subject: [PATCH] media: bcm2835-unicam: Use dummy buffer if none have
- been queued
-
-If no buffer has been queued by a userland application, we use an
-internal dummy buffer for the hardware to spin in. This will allow
-the driver to release the existing userland buffer back to the
-application for processing.
-
-Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
----
- .../media/platform/bcm2835/bcm2835-unicam.c   | 160 ++++++++++++------
- 1 file changed, 110 insertions(+), 50 deletions(-)
-
---- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
-+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
-@@ -47,6 +47,7 @@
- #include <linux/clk.h>
- #include <linux/delay.h>
- #include <linux/device.h>
-+#include <linux/dma-mapping.h>
- #include <linux/err.h>
- #include <linux/init.h>
- #include <linux/interrupt.h>
-@@ -112,6 +113,12 @@ MODULE_PARM_DESC(debug, "Debug level 0-3
- /* Default size of the embedded buffer */
- #define UNICAM_EMBEDDED_SIZE	8192
- 
-+/*
-+ * Size of the dummy buffer. Can be any size really, but the DMA
-+ * allocation works in units of page sizes.
-+ */
-+#define DUMMY_BUF_SIZE	(PAGE_SIZE)
-+
- enum pad_types {
- 	IMAGE_PAD,
- 	METADATA_PAD,
-@@ -390,6 +397,12 @@ struct unicam_node {
- 	struct media_pad pad;
- 	struct v4l2_ctrl_handler ctrl_handler;
- 	unsigned int embedded_lines;
-+	/*
-+	 * Dummy buffer intended to be used by unicam
-+	 * if we have no other queued buffers to swap to.
-+	 */
-+	void *dummy_buf_cpu_addr;
-+	dma_addr_t dummy_buf_dma_addr;
- };
- 
- struct unicam_device {
-@@ -661,27 +674,24 @@ static int unicam_reset_format(struct un
- 	return 0;
- }
- 
--static void unicam_wr_dma_addr(struct unicam_device *dev, dma_addr_t dmaaddr,
--			       int pad_id)
-+static void unicam_wr_dma_addr(struct unicam_cfg *cfg, dma_addr_t dmaaddr,
-+			       unsigned int buffer_size, int pad_id)
- {
--	dma_addr_t endaddr;
-+	dma_addr_t endaddr = dmaaddr + buffer_size;
- 
- 	/*
--	 * dmaaddr should be a 32-bit address with the top two bits set to 0x3
--	 * to signify uncached access through the Videocore memory controller.
-+	 * dmaaddr and endaddr should be a 32-bit address with the top two bits
-+	 * set to 0x3 to signify uncached access through the Videocore memory
-+	 * controller.
- 	 */
--	BUG_ON((dmaaddr >> 30) != 0x3);
-+	BUG_ON((dmaaddr >> 30) != 0x3 && (endaddr >> 30) != 0x3);
- 
- 	if (pad_id == IMAGE_PAD) {
--		endaddr = dmaaddr +
--			  dev->node[IMAGE_PAD].v_fmt.fmt.pix.sizeimage;
--		reg_write(&dev->cfg, UNICAM_IBSA0, dmaaddr);
--		reg_write(&dev->cfg, UNICAM_IBEA0, endaddr);
-+		reg_write(cfg, UNICAM_IBSA0, dmaaddr);
-+		reg_write(cfg, UNICAM_IBEA0, endaddr);
- 	} else {
--		endaddr = dmaaddr +
--			  dev->node[METADATA_PAD].v_fmt.fmt.meta.buffersize;
--		reg_write(&dev->cfg, UNICAM_DBSA0, dmaaddr);
--		reg_write(&dev->cfg, UNICAM_DBEA0, endaddr);
-+		reg_write(cfg, UNICAM_DBSA0, dmaaddr);
-+		reg_write(cfg, UNICAM_DBEA0, endaddr);
- 	}
- }
- 
-@@ -704,6 +714,7 @@ static inline void unicam_schedule_next_
- 	struct unicam_device *dev = node->dev;
- 	struct unicam_dmaqueue *dma_q = &node->dma_queue;
- 	struct unicam_buffer *buf;
-+	unsigned int size;
- 	dma_addr_t addr;
- 
- 	buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
-@@ -711,7 +722,23 @@ static inline void unicam_schedule_next_
- 	list_del(&buf->list);
- 
- 	addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
--	unicam_wr_dma_addr(dev, addr, node->pad_id);
-+	size = (node->pad_id == IMAGE_PAD) ?
-+			dev->node[IMAGE_PAD].v_fmt.fmt.pix.sizeimage :
-+			dev->node[METADATA_PAD].v_fmt.fmt.meta.buffersize;
-+
-+	unicam_wr_dma_addr(&dev->cfg, addr, size, node->pad_id);
-+}
-+
-+static inline void unicam_schedule_dummy_buffer(struct unicam_node *node)
-+{
-+	struct unicam_device *dev = node->dev;
-+	dma_addr_t addr = node->dummy_buf_dma_addr;
-+
-+	unicam_dbg(3, dev, "Scheduling dummy buffer for node %d\n",
-+		   node->pad_id);
-+
-+	unicam_wr_dma_addr(&dev->cfg, addr, DUMMY_BUF_SIZE, node->pad_id);
-+	node->next_frm = NULL;
- }
- 
- static inline void unicam_process_buffer_complete(struct unicam_node *node,
-@@ -721,7 +748,6 @@ static inline void unicam_process_buffer
- 	node->cur_frm->vb.sequence = sequence;
- 
- 	vb2_buffer_done(&node->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
--	node->cur_frm = node->next_frm;
- }
- 
- static int unicam_num_nodes_streaming(struct unicam_device *dev)
-@@ -788,6 +814,28 @@ static irqreturn_t unicam_isr(int irq, v
- 	if (!(sta && (UNICAM_IS | UNICAM_PI0)))
- 		return IRQ_HANDLED;
- 
-+	/*
-+	 * We must run the frame end handler first. If we have a valid next_frm
-+	 * and we get a simultaneout FE + FS interrupt, running the FS handler
-+	 * first would null out the next_frm ptr and we would have lost the
-+	 * buffer forever.
-+	 */
-+	if (ista & UNICAM_FEI || sta & UNICAM_PI0) {
-+		/*
-+		 * Ensure we have swapped buffers already as we can't
-+		 * stop the peripheral. If no buffer is available, use a
-+		 * dummy buffer to dump out frames until we get a new buffer
-+		 * to use.
-+		 */
-+		for (i = 0; i < num_nodes_streaming; i++) {
-+			if (unicam->node[i].cur_frm)
-+				unicam_process_buffer_complete(&unicam->node[i],
-+							       sequence);
-+			unicam->node[i].cur_frm = unicam->node[i].next_frm;
-+		}
-+		unicam->sequence++;
-+	}
-+
- 	if (ista & UNICAM_FSI) {
- 		/*
- 		 * Timestamp is to be when the first data byte was captured,
-@@ -798,24 +846,16 @@ static irqreturn_t unicam_isr(int irq, v
- 			if (unicam->node[i].cur_frm)
- 				unicam->node[i].cur_frm->vb.vb2_buf.timestamp =
- 								ts;
-+			/*
-+			 * Set the next frame output to go to a dummy frame
-+			 * if we have not managed to obtain another frame
-+			 * from the queue.
-+			 */
-+			unicam_schedule_dummy_buffer(&unicam->node[i]);
- 		}
- 	}
--	if (ista & UNICAM_FEI || sta & UNICAM_PI0) {
--		/*
--		 * Ensure we have swapped buffers already as we can't
--		 * stop the peripheral. Overwrite the frame we've just
--		 * captured instead.
--		 */
--		for (i = 0; i < num_nodes_streaming; i++) {
--			if (unicam->node[i].cur_frm &&
--			    unicam->node[i].cur_frm != unicam->node[i].next_frm)
--				unicam_process_buffer_complete(&unicam->node[i],
--							       sequence);
--		}
--		unicam->sequence++;
--	}
--
--	/* Cannot swap buffer at frame end, there may be a race condition
-+	/*
-+	 * Cannot swap buffer at frame end, there may be a race condition
- 	 * where the HW does not actually swap it if the new frame has
- 	 * already started.
- 	 */
-@@ -823,7 +863,7 @@ static irqreturn_t unicam_isr(int irq, v
- 		for (i = 0; i < num_nodes_streaming; i++) {
- 			spin_lock(&unicam->node[i].dma_queue_lock);
- 			if (!list_empty(&unicam->node[i].dma_queue.active) &&
--			    unicam->node[i].cur_frm == unicam->node[i].next_frm)
-+			    !unicam->node[i].next_frm)
- 				unicam_schedule_next_buffer(&unicam->node[i]);
- 			spin_unlock(&unicam->node[i].dma_queue_lock);
- 		}
-@@ -1352,7 +1392,7 @@ static void unicam_start_rx(struct unica
- {
- 	struct unicam_cfg *cfg = &dev->cfg;
- 	int line_int_freq = dev->node[IMAGE_PAD].v_fmt.fmt.pix.height >> 2;
--	unsigned int i;
-+	unsigned int size, i;
- 	u32 val;
- 
- 	if (line_int_freq < 128)
-@@ -1413,7 +1453,7 @@ static void unicam_start_rx(struct unica
- 	reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_DDL);
- 
- 	/* Always start in trigger frame capture mode (UNICAM_FCM set) */
--	val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM;
-+	val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM | UNICAM_IBOB;
- 	set_field(&val,  line_int_freq, UNICAM_LCIE_MASK);
- 	reg_write(cfg, UNICAM_ICTL, val);
- 	reg_write(cfg, UNICAM_STA, UNICAM_STA_MASK_ALL);
-@@ -1501,7 +1541,8 @@ static void unicam_start_rx(struct unica
- 
- 	reg_write(&dev->cfg, UNICAM_IBLS,
- 		  dev->node[IMAGE_PAD].v_fmt.fmt.pix.bytesperline);
--	unicam_wr_dma_addr(dev, addr[IMAGE_PAD], IMAGE_PAD);
-+	size = dev->node[IMAGE_PAD].v_fmt.fmt.pix.sizeimage;
-+	unicam_wr_dma_addr(&dev->cfg, addr[IMAGE_PAD], size, IMAGE_PAD);
- 	unicam_set_packing_config(dev);
- 	unicam_cfg_image_id(dev);
- 
-@@ -1511,8 +1552,10 @@ static void unicam_start_rx(struct unica
- 	reg_write(cfg, UNICAM_MISC, val);
- 
- 	if (dev->node[METADATA_PAD].streaming && dev->sensor_embedded_data) {
-+		size = dev->node[METADATA_PAD].v_fmt.fmt.meta.buffersize;
- 		unicam_enable_ed(dev);
--		unicam_wr_dma_addr(dev, addr[METADATA_PAD], METADATA_PAD);
-+		unicam_wr_dma_addr(&dev->cfg, addr[METADATA_PAD], size,
-+				   METADATA_PAD);
- 	}
- 
- 	/* Enable peripheral */
-@@ -1686,13 +1729,14 @@ static void unicam_stop_streaming(struct
- 		unicam_runtime_put(dev);
- 
- 	} else if (node->pad_id == METADATA_PAD) {
--		/* Null out the embedded data buffer address so the HW does
--		 * not use it.  This is only really needed if the embedded data
--		 * pad is disabled before the image pad.  The 0x3 in the top two
--		 * bits signifies uncached accesses through the Videocore
--		 * memory controller.
-+		/* Allow the hardware to spin in the dummy buffer.
-+		 * This is only really needed if the embedded data pad is
-+		 * disabled before the image pad.  The 0x3 in the top two bits
-+		 * signifies uncached accesses through the Videocore memory
-+		 * controller.
- 		 */
--		unicam_wr_dma_addr(dev, 0xc0000000, METADATA_PAD);
-+		unicam_wr_dma_addr(&dev->cfg, node->dummy_buf_dma_addr,
-+				   DUMMY_BUF_SIZE, METADATA_PAD);
- 	}
- 
- 	/* Clear all queued buffers for the node */
-@@ -2321,6 +2365,15 @@ static int register_node(struct unicam_d
- 	video_set_drvdata(vdev, node);
- 	vdev->entity.flags |= MEDIA_ENT_FL_DEFAULT;
- 
-+	node->dummy_buf_cpu_addr = dma_alloc_coherent(&unicam->pdev->dev,
-+						      DUMMY_BUF_SIZE,
-+						      &node->dummy_buf_dma_addr,
-+						      GFP_ATOMIC);
-+	if (!node->dummy_buf_cpu_addr) {
-+		unicam_err(unicam, "Unable to allocate dummy buffer.\n");
-+		return -ENOMEM;
-+	}
-+
- 	if (node->pad_id == METADATA_PAD ||
- 	    !v4l2_subdev_has_op(unicam->sensor, video, s_std)) {
- 		v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_STD);
-@@ -2376,13 +2429,20 @@ static int register_node(struct unicam_d
- 
- static void unregister_nodes(struct unicam_device *unicam)
- {
--	if (unicam->node[IMAGE_PAD].registered) {
--		video_unregister_device(&unicam->node[IMAGE_PAD].video_dev);
--		unicam->node[IMAGE_PAD].registered = 0;
--	}
--	if (unicam->node[METADATA_PAD].registered) {
--		video_unregister_device(&unicam->node[METADATA_PAD].video_dev);
--		unicam->node[METADATA_PAD].registered = 0;
-+	struct unicam_node *node;
-+	int i;
-+
-+	for (i = 0; i < MAX_NODES; i++) {
-+		node = &unicam->node[i];
-+		if (node->dummy_buf_cpu_addr) {
-+			dma_free_coherent(&unicam->pdev->dev, DUMMY_BUF_SIZE,
-+					  node->dummy_buf_cpu_addr,
-+					  node->dummy_buf_dma_addr);
-+		}
-+		if (node->registered) {
-+			video_unregister_device(&node->video_dev);
-+			node->registered = 0;
-+		}
- 	}
- }
-