Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1141 insertions, 0 deletions

diff --git a/drivers/media/platform/vsp1/vsp1_dl.c b/drivers/media/platform/vsp1/vsp1_dl.c
new file mode 100644
index 000000000..a07caf981
--- /dev/null
+++ b/drivers/media/platform/vsp1/vsp1_dl.c
@@ -0,0 +1,1141 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * vsp1_dl.c  --  R-Car VSP1 Display List
+ *
+ * Copyright (C) 2015 Renesas Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/gfp.h>
+#include <linux/refcount.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#include "vsp1.h"
+#include "vsp1_dl.h"
+
+#define VSP1_DL_NUM_ENTRIES		256
+
+#define VSP1_DLH_INT_ENABLE		(1 << 1)
+#define VSP1_DLH_AUTO_START		(1 << 0)
+
+#define VSP1_DLH_EXT_PRE_CMD_EXEC	(1 << 9)
+#define VSP1_DLH_EXT_POST_CMD_EXEC	(1 << 8)
+
+struct vsp1_dl_header_list {
+	u32 num_bytes;
+	u32 addr;
+} __packed;
+
+struct vsp1_dl_header {
+	u32 num_lists;
+	struct vsp1_dl_header_list lists[8];
+	u32 next_header;
+	u32 flags;
+} __packed;
+
+/**
+ * struct vsp1_dl_ext_header - Extended display list header
+ * @padding: padding zero bytes for alignment
+ * @pre_ext_dl_num_cmd: number of pre-extended command bodies to parse
+ * @flags: enables or disables execution of the pre and post command
+ * @pre_ext_dl_plist: start address of pre-extended display list bodies
+ * @post_ext_dl_num_cmd: number of post-extended command bodies to parse
+ * @post_ext_dl_plist: start address of post-extended display list bodies
+ */
+struct vsp1_dl_ext_header {
+	u32 padding;
+
+	/*
+	 * The datasheet represents flags as stored before pre_ext_dl_num_cmd,
+	 * expecting 32-bit accesses. The flags are appropriate to the whole
+	 * header, not just the pre_ext command, and thus warrant being
+	 * separated out. Due to byte ordering, and representing as 16 bit
+	 * values here, the flags must be positioned after the
+	 * pre_ext_dl_num_cmd.
+	 */
+	u16 pre_ext_dl_num_cmd;
+	u16 flags;
+	u32 pre_ext_dl_plist;
+
+	u32 post_ext_dl_num_cmd;
+	u32 post_ext_dl_plist;
+} __packed;
+
+struct vsp1_dl_header_extended {
+	struct vsp1_dl_header header;
+	struct vsp1_dl_ext_header ext;
+} __packed;
+
+struct vsp1_dl_entry {
+	u32 addr;
+	u32 data;
+} __packed;
+
+/**
+ * struct vsp1_pre_ext_dl_body - Pre Extended Display List Body
+ * @opcode: Extended display list command operation code
+ * @flags: Pre-extended command flags. These are specific to each command
+ * @address_set: Source address set pointer. Must have 16-byte alignment
+ * @reserved: Zero bits for alignment.
+ */
+struct vsp1_pre_ext_dl_body {
+	u32 opcode;
+	u32 flags;
+	u32 address_set;
+	u32 reserved;
+} __packed;
+
+/**
+ * struct vsp1_dl_body - Display list body
+ * @list: entry in the display list list of bodies
+ * @free: entry in the pool free body list
+ * @refcnt: reference tracking for the body
+ * @pool: pool to which this body belongs
+ * @entries: array of entries
+ * @dma: DMA address of the entries
+ * @size: size of the DMA memory in bytes
+ * @num_entries: number of stored entries
+ * @max_entries: number of entries available
+ */
+struct vsp1_dl_body {
+	struct list_head list;
+	struct list_head free;
+
+	refcount_t refcnt;
+
+	struct vsp1_dl_body_pool *pool;
+
+	struct vsp1_dl_entry *entries;
+	dma_addr_t dma;
+	size_t size;
+
+	unsigned int num_entries;
+	unsigned int max_entries;
+};
+
+/**
+ * struct vsp1_dl_body_pool - display list body pool
+ * @dma: DMA address of the entries
+ * @size: size of the full DMA memory pool in bytes
+ * @mem: CPU memory pointer for the pool
+ * @bodies: Array of DLB structures for the pool
+ * @free: List of free DLB entries
+ * @lock: Protects the free list
+ * @vsp1: the VSP1 device
+ */
+struct vsp1_dl_body_pool {
+	/* DMA allocation */
+	dma_addr_t dma;
+	size_t size;
+	void *mem;
+
+	/* Body management */
+	struct vsp1_dl_body *bodies;
+	struct list_head free;
+	spinlock_t lock;
+
+	struct vsp1_device *vsp1;
+};
+
+/**
+ * struct vsp1_cmd_pool - Display List commands pool
+ * @dma: DMA address of the entries
+ * @size: size of the full DMA memory pool in bytes
+ * @mem: CPU memory pointer for the pool
+ * @cmds: Array of command structures for the pool
+ * @free: Free pool entries
+ * @lock: Protects the free list
+ * @vsp1: the VSP1 device
+ */
+struct vsp1_dl_cmd_pool {
+	/* DMA allocation */
+	dma_addr_t dma;
+	size_t size;
+	void *mem;
+
+	struct vsp1_dl_ext_cmd *cmds;
+	struct list_head free;
+
+	spinlock_t lock;
+
+	struct vsp1_device *vsp1;
+};
+
+/**
+ * struct vsp1_dl_list - Display list
+ * @list: entry in the display list manager lists
+ * @dlm: the display list manager
+ * @header: display list header
+ * @extension: extended display list header. NULL for normal lists
+ * @dma: DMA address for the header
+ * @body0: first display list body
+ * @bodies: list of extra display list bodies
+ * @pre_cmd: pre command to be issued through extended dl header
+ * @post_cmd: post command to be issued through extended dl header
+ * @has_chain: if true, indicates that there's a partition chain
+ * @chain: entry in the display list partition chain
+ * @internal: whether the display list is used for internal purpose
+ */
+struct vsp1_dl_list {
+	struct list_head list;
+	struct vsp1_dl_manager *dlm;
+
+	struct vsp1_dl_header *header;
+	struct vsp1_dl_ext_header *extension;
+	dma_addr_t dma;
+
+	struct vsp1_dl_body *body0;
+	struct list_head bodies;
+
+	struct vsp1_dl_ext_cmd *pre_cmd;
+	struct vsp1_dl_ext_cmd *post_cmd;
+
+	bool has_chain;
+	struct list_head chain;
+
+	bool internal;
+};
+
+/**
+ * struct vsp1_dl_manager - Display List manager
+ * @index: index of the related WPF
+ * @singleshot: execute the display list in single-shot mode
+ * @vsp1: the VSP1 device
+ * @lock: protects the free, active, queued, and pending lists
+ * @free: array of all free display lists
+ * @active: list currently being processed (loaded) by hardware
+ * @queued: list queued to the hardware (written to the DL registers)
+ * @pending: list waiting to be queued to the hardware
+ * @pool: body pool for the display list bodies
+ * @cmdpool: commands pool for extended display list
+ */
+struct vsp1_dl_manager {
+	unsigned int index;
+	bool singleshot;
+	struct vsp1_device *vsp1;
+
+	spinlock_t lock;
+	struct list_head free;
+	struct vsp1_dl_list *active;
+	struct vsp1_dl_list *queued;
+	struct vsp1_dl_list *pending;
+
+	struct vsp1_dl_body_pool *pool;
+	struct vsp1_dl_cmd_pool *cmdpool;
+};
+
+/* -----------------------------------------------------------------------------
+ * Display List Body Management
+ */
+
+/**
+ * vsp1_dl_body_pool_create - Create a pool of bodies from a single allocation
+ * @vsp1: The VSP1 device
+ * @num_bodies: The number of bodies to allocate
+ * @num_entries: The maximum number of entries that a body can contain
+ * @extra_size: Extra allocation provided for the bodies
+ *
+ * Allocate a pool of display list bodies each with enough memory to contain the
+ * requested number of entries plus the @extra_size.
+ *
+ * Return a pointer to a pool on success or NULL if memory can't be allocated.
+ */
+struct vsp1_dl_body_pool *
+vsp1_dl_body_pool_create(struct vsp1_device *vsp1, unsigned int num_bodies,
+			 unsigned int num_entries, size_t extra_size)
+{
+	struct vsp1_dl_body_pool *pool;
+	size_t dlb_size;
+	unsigned int i;
+
+	pool = kzalloc(sizeof(*pool), GFP_KERNEL);
+	if (!pool)
+		return NULL;
+
+	pool->vsp1 = vsp1;
+
+	/*
+	 * TODO: 'extra_size' is only used by vsp1_dlm_create(), to allocate
+	 * extra memory for the display list header. We need only one header per
+	 * display list, not per display list body, thus this allocation is
+	 * extraneous and should be reworked in the future.
+	 */
+	dlb_size = num_entries * sizeof(struct vsp1_dl_entry) + extra_size;
+	pool->size = dlb_size * num_bodies;
+
+	pool->bodies = kcalloc(num_bodies, sizeof(*pool->bodies), GFP_KERNEL);
+	if (!pool->bodies) {
+		kfree(pool);
+		return NULL;
+	}
+
+	pool->mem = dma_alloc_wc(vsp1->bus_master, pool->size, &pool->dma,
+				 GFP_KERNEL);
+	if (!pool->mem) {
+		kfree(pool->bodies);
+		kfree(pool);
+		return NULL;
+	}
+
+	spin_lock_init(&pool->lock);
+	INIT_LIST_HEAD(&pool->free);
+
+	for (i = 0; i < num_bodies; ++i) {
+		struct vsp1_dl_body *dlb = &pool->bodies[i];
+
+		dlb->pool = pool;
+		dlb->max_entries = num_entries;
+
+		dlb->dma = pool->dma + i * dlb_size;
+		dlb->entries = pool->mem + i * dlb_size;
+
+		list_add_tail(&dlb->free, &pool->free);
+	}
+
+	return pool;
+}
+
+/**
+ * vsp1_dl_body_pool_destroy - Release a body pool
+ * @pool: The body pool
+ *
+ * Release all components of a pool allocation.
+ */
+void vsp1_dl_body_pool_destroy(struct vsp1_dl_body_pool *pool)
+{
+	if (!pool)
+		return;
+
+	if (pool->mem)
+		dma_free_wc(pool->vsp1->bus_master, pool->size, pool->mem,
+			    pool->dma);
+
+	kfree(pool->bodies);
+	kfree(pool);
+}
+
+/**
+ * vsp1_dl_body_get - Obtain a body from a pool
+ * @pool: The body pool
+ *
+ * Obtain a body from the pool without blocking.
+ *
+ * Returns a display list body or NULL if there are none available.
+ */
+struct vsp1_dl_body *vsp1_dl_body_get(struct vsp1_dl_body_pool *pool)
+{
+	struct vsp1_dl_body *dlb = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pool->lock, flags);
+
+	if (!list_empty(&pool->free)) {
+		dlb = list_first_entry(&pool->free, struct vsp1_dl_body, free);
+		list_del(&dlb->free);
+		refcount_set(&dlb->refcnt, 1);
+	}
+
+	spin_unlock_irqrestore(&pool->lock, flags);
+
+	return dlb;
+}
+
+/**
+ * vsp1_dl_body_put - Return a body back to its pool
+ * @dlb: The display list body
+ *
+ * Return a body back to the pool, and reset the num_entries to clear the list.
+ */
+void vsp1_dl_body_put(struct vsp1_dl_body *dlb)
+{
+	unsigned long flags;
+
+	if (!dlb)
+		return;
+
+	if (!refcount_dec_and_test(&dlb->refcnt))
+		return;
+
+	dlb->num_entries = 0;
+
+	spin_lock_irqsave(&dlb->pool->lock, flags);
+	list_add_tail(&dlb->free, &dlb->pool->free);
+	spin_unlock_irqrestore(&dlb->pool->lock, flags);
+}
+
+/**
+ * vsp1_dl_body_write - Write a register to a display list body
+ * @dlb: The body
+ * @reg: The register address
+ * @data: The register value
+ *
+ * Write the given register and value to the display list body. The maximum
+ * number of entries that can be written in a body is specified when the body is
+ * allocated by vsp1_dl_body_alloc().
+ */
+void vsp1_dl_body_write(struct vsp1_dl_body *dlb, u32 reg, u32 data)
+{
+	if (WARN_ONCE(dlb->num_entries >= dlb->max_entries,
+		      "DLB size exceeded (max %u)", dlb->max_entries))
+		return;
+
+	dlb->entries[dlb->num_entries].addr = reg;
+	dlb->entries[dlb->num_entries].data = data;
+	dlb->num_entries++;
+}
+
+/* -----------------------------------------------------------------------------
+ * Display List Extended Command Management
+ */
+
+enum vsp1_extcmd_type {
+	VSP1_EXTCMD_AUTODISP,
+	VSP1_EXTCMD_AUTOFLD,
+};
+
+struct vsp1_extended_command_info {
+	u16 opcode;
+	size_t body_size;
+};
+
+static const struct vsp1_extended_command_info vsp1_extended_commands[] = {
+	[VSP1_EXTCMD_AUTODISP] = { 0x02, 96 },
+	[VSP1_EXTCMD_AUTOFLD]  = { 0x03, 160 },
+};
+
+/**
+ * vsp1_dl_cmd_pool_create - Create a pool of commands from a single allocation
+ * @vsp1: The VSP1 device
+ * @type: The command pool type
+ * @num_cmds: The number of commands to allocate
+ *
+ * Allocate a pool of commands each with enough memory to contain the private
+ * data of each command. The allocation sizes are dependent upon the command
+ * type.
+ *
+ * Return a pointer to the pool on success or NULL if memory can't be allocated.
+ */
+static struct vsp1_dl_cmd_pool *
+vsp1_dl_cmd_pool_create(struct vsp1_device *vsp1, enum vsp1_extcmd_type type,
+			unsigned int num_cmds)
+{
+	struct vsp1_dl_cmd_pool *pool;
+	unsigned int i;
+	size_t cmd_size;
+
+	pool = kzalloc(sizeof(*pool), GFP_KERNEL);
+	if (!pool)
+		return NULL;
+
+	pool->vsp1 = vsp1;
+
+	spin_lock_init(&pool->lock);
+	INIT_LIST_HEAD(&pool->free);
+
+	pool->cmds = kcalloc(num_cmds, sizeof(*pool->cmds), GFP_KERNEL);
+	if (!pool->cmds) {
+		kfree(pool);
+		return NULL;
+	}
+
+	cmd_size = sizeof(struct vsp1_pre_ext_dl_body) +
+		   vsp1_extended_commands[type].body_size;
+	cmd_size = ALIGN(cmd_size, 16);
+
+	pool->size = cmd_size * num_cmds;
+	pool->mem = dma_alloc_wc(vsp1->bus_master, pool->size, &pool->dma,
+				 GFP_KERNEL);
+	if (!pool->mem) {
+		kfree(pool->cmds);
+		kfree(pool);
+		return NULL;
+	}
+
+	for (i = 0; i < num_cmds; ++i) {
+		struct vsp1_dl_ext_cmd *cmd = &pool->cmds[i];
+		size_t cmd_offset = i * cmd_size;
+		/* data_offset must be 16 byte aligned for DMA. */
+		size_t data_offset = sizeof(struct vsp1_pre_ext_dl_body) +
+				     cmd_offset;
+
+		cmd->pool = pool;
+		cmd->opcode = vsp1_extended_commands[type].opcode;
+
+		/*
+		 * TODO: Auto-disp can utilise more than one extended body
+		 * command per cmd.
+		 */
+		cmd->num_cmds = 1;
+		cmd->cmds = pool->mem + cmd_offset;
+		cmd->cmd_dma = pool->dma + cmd_offset;
+
+		cmd->data = pool->mem + data_offset;
+		cmd->data_dma = pool->dma + data_offset;
+
+		list_add_tail(&cmd->free, &pool->free);
+	}
+
+	return pool;
+}
+
+static
+struct vsp1_dl_ext_cmd *vsp1_dl_ext_cmd_get(struct vsp1_dl_cmd_pool *pool)
+{
+	struct vsp1_dl_ext_cmd *cmd = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pool->lock, flags);
+
+	if (!list_empty(&pool->free)) {
+		cmd = list_first_entry(&pool->free, struct vsp1_dl_ext_cmd,
+				       free);
+		list_del(&cmd->free);
+	}
+
+	spin_unlock_irqrestore(&pool->lock, flags);
+
+	return cmd;
+}
+
+static void vsp1_dl_ext_cmd_put(struct vsp1_dl_ext_cmd *cmd)
+{
+	unsigned long flags;
+
+	if (!cmd)
+		return;
+
+	/* Reset flags, these mark data usage. */
+	cmd->flags = 0;
+
+	spin_lock_irqsave(&cmd->pool->lock, flags);
+	list_add_tail(&cmd->free, &cmd->pool->free);
+	spin_unlock_irqrestore(&cmd->pool->lock, flags);
+}
+
+static void vsp1_dl_ext_cmd_pool_destroy(struct vsp1_dl_cmd_pool *pool)
+{
+	if (!pool)
+		return;
+
+	if (pool->mem)
+		dma_free_wc(pool->vsp1->bus_master, pool->size, pool->mem,
+			    pool->dma);
+
+	kfree(pool->cmds);
+	kfree(pool);
+}
+
+struct vsp1_dl_ext_cmd *vsp1_dl_get_pre_cmd(struct vsp1_dl_list *dl)
+{
+	struct vsp1_dl_manager *dlm = dl->dlm;
+
+	if (dl->pre_cmd)
+		return dl->pre_cmd;
+
+	dl->pre_cmd = vsp1_dl_ext_cmd_get(dlm->cmdpool);
+
+	return dl->pre_cmd;
+}
+
+/* ----------------------------------------------------------------------------
+ * Display List Transaction Management
+ */
+
+static struct vsp1_dl_list *vsp1_dl_list_alloc(struct vsp1_dl_manager *dlm)
+{
+	struct vsp1_dl_list *dl;
+	size_t header_offset;
+
+	dl = kzalloc(sizeof(*dl), GFP_KERNEL);
+	if (!dl)
+		return NULL;
+
+	INIT_LIST_HEAD(&dl->bodies);
+	dl->dlm = dlm;
+
+	/* Get a default body for our list. */
+	dl->body0 = vsp1_dl_body_get(dlm->pool);
+	if (!dl->body0) {
+		kfree(dl);
+		return NULL;
+	}
+
+	header_offset = dl->body0->max_entries * sizeof(*dl->body0->entries);
+
+	dl->header = ((void *)dl->body0->entries) + header_offset;
+	dl->dma = dl->body0->dma + header_offset;
+
+	memset(dl->header, 0, sizeof(*dl->header));
+	dl->header->lists[0].addr = dl->body0->dma;
+
+	return dl;
+}
+
+static void vsp1_dl_list_bodies_put(struct vsp1_dl_list *dl)
+{
+	struct vsp1_dl_body *dlb, *tmp;
+
+	list_for_each_entry_safe(dlb, tmp, &dl->bodies, list) {
+		list_del(&dlb->list);
+		vsp1_dl_body_put(dlb);
+	}
+}
+
+static void vsp1_dl_list_free(struct vsp1_dl_list *dl)
+{
+	vsp1_dl_body_put(dl->body0);
+	vsp1_dl_list_bodies_put(dl);
+
+	kfree(dl);
+}
+
+/**
+ * vsp1_dl_list_get - Get a free display list
+ * @dlm: The display list manager
+ *
+ * Get a display list from the pool of free lists and return it.
+ *
+ * This function must be called without the display list manager lock held.
+ */
+struct vsp1_dl_list *vsp1_dl_list_get(struct vsp1_dl_manager *dlm)
+{
+	struct vsp1_dl_list *dl = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dlm->lock, flags);
+
+	if (!list_empty(&dlm->free)) {
+		dl = list_first_entry(&dlm->free, struct vsp1_dl_list, list);
+		list_del(&dl->list);
+
+		/*
+		 * The display list chain must be initialised to ensure every
+		 * display list can assert list_empty() if it is not in a chain.
+		 */
+		INIT_LIST_HEAD(&dl->chain);
+	}
+
+	spin_unlock_irqrestore(&dlm->lock, flags);
+
+	return dl;
+}
+
+/* This function must be called with the display list manager lock held.*/
+static void __vsp1_dl_list_put(struct vsp1_dl_list *dl)
+{
+	struct vsp1_dl_list *dl_next;
+
+	if (!dl)
+		return;
+
+	/*
+	 * Release any linked display-lists which were chained for a single
+	 * hardware operation.
+	 */
+	if (dl->has_chain) {
+		list_for_each_entry(dl_next, &dl->chain, chain)
+			__vsp1_dl_list_put(dl_next);
+	}
+
+	dl->has_chain = false;
+
+	vsp1_dl_list_bodies_put(dl);
+
+	vsp1_dl_ext_cmd_put(dl->pre_cmd);
+	vsp1_dl_ext_cmd_put(dl->post_cmd);
+
+	dl->pre_cmd = NULL;
+	dl->post_cmd = NULL;
+
+	/*
+	 * body0 is reused as as an optimisation as presently every display list
+	 * has at least one body, thus we reinitialise the entries list.
+	 */
+	dl->body0->num_entries = 0;
+
+	list_add_tail(&dl->list, &dl->dlm->free);
+}
+
+/**
+ * vsp1_dl_list_put - Release a display list
+ * @dl: The display list
+ *
+ * Release the display list and return it to the pool of free lists.
+ *
+ * Passing a NULL pointer to this function is safe, in that case no operation
+ * will be performed.
+ */
+void vsp1_dl_list_put(struct vsp1_dl_list *dl)
+{
+	unsigned long flags;
+
+	if (!dl)
+		return;
+
+	spin_lock_irqsave(&dl->dlm->lock, flags);
+	__vsp1_dl_list_put(dl);
+	spin_unlock_irqrestore(&dl->dlm->lock, flags);
+}
+
+/**
+ * vsp1_dl_list_get_body0 - Obtain the default body for the display list
+ * @dl: The display list
+ *
+ * Obtain a pointer to the internal display list body allowing this to be passed
+ * directly to configure operations.
+ */
+struct vsp1_dl_body *vsp1_dl_list_get_body0(struct vsp1_dl_list *dl)
+{
+	return dl->body0;
+}
+
+/**
+ * vsp1_dl_list_add_body - Add a body to the display list
+ * @dl: The display list
+ * @dlb: The body
+ *
+ * Add a display list body to a display list. Registers contained in bodies are
+ * processed after registers contained in the main display list, in the order in
+ * which bodies are added.
+ *
+ * Adding a body to a display list passes ownership of the body to the list. The
+ * caller retains its reference to the fragment when adding it to the display
+ * list, but is not allowed to add new entries to the body.
+ *
+ * The reference must be explicitly released by a call to vsp1_dl_body_put()
+ * when the body isn't needed anymore.
+ */
+int vsp1_dl_list_add_body(struct vsp1_dl_list *dl, struct vsp1_dl_body *dlb)
+{
+	refcount_inc(&dlb->refcnt);
+
+	list_add_tail(&dlb->list, &dl->bodies);
+
+	return 0;
+}
+
+/**
+ * vsp1_dl_list_add_chain - Add a display list to a chain
+ * @head: The head display list
+ * @dl: The new display list
+ *
+ * Add a display list to an existing display list chain. The chained lists
+ * will be automatically processed by the hardware without intervention from
+ * the CPU. A display list end interrupt will only complete after the last
+ * display list in the chain has completed processing.
+ *
+ * Adding a display list to a chain passes ownership of the display list to
+ * the head display list item. The chain is released when the head dl item is
+ * put back with __vsp1_dl_list_put().
+ */
+int vsp1_dl_list_add_chain(struct vsp1_dl_list *head,
+			   struct vsp1_dl_list *dl)
+{
+	head->has_chain = true;
+	list_add_tail(&dl->chain, &head->chain);
+	return 0;
+}
+
+static void vsp1_dl_ext_cmd_fill_header(struct vsp1_dl_ext_cmd *cmd)
+{
+	cmd->cmds[0].opcode = cmd->opcode;
+	cmd->cmds[0].flags = cmd->flags;
+	cmd->cmds[0].address_set = cmd->data_dma;
+	cmd->cmds[0].reserved = 0;
+}
+
+static void vsp1_dl_list_fill_header(struct vsp1_dl_list *dl, bool is_last)
+{
+	struct vsp1_dl_manager *dlm = dl->dlm;
+	struct vsp1_dl_header_list *hdr = dl->header->lists;
+	struct vsp1_dl_body *dlb;
+	unsigned int num_lists = 0;
+
+	/*
+	 * Fill the header with the display list bodies addresses and sizes. The
+	 * address of the first body has already been filled when the display
+	 * list was allocated.
+	 */
+
+	hdr->num_bytes = dl->body0->num_entries
+		       * sizeof(*dl->header->lists);
+
+	list_for_each_entry(dlb, &dl->bodies, list) {
+		num_lists++;
+		hdr++;
+
+		hdr->addr = dlb->dma;
+		hdr->num_bytes = dlb->num_entries
+			       * sizeof(*dl->header->lists);
+	}
+
+	dl->header->num_lists = num_lists;
+
+	if (!list_empty(&dl->chain) && !is_last) {
+		/*
+		 * If this display list's chain is not empty, we are on a list,
+		 * and the next item is the display list that we must queue for
+		 * automatic processing by the hardware.
+		 */
+		struct vsp1_dl_list *next = list_next_entry(dl, chain);
+
+		dl->header->next_header = next->dma;
+		dl->header->flags = VSP1_DLH_AUTO_START;
+	} else if (!dlm->singleshot) {
+		/*
+		 * if the display list manager works in continuous mode, the VSP
+		 * should loop over the display list continuously until
+		 * instructed to do otherwise.
+		 */
+		dl->header->next_header = dl->dma;
+		dl->header->flags = VSP1_DLH_INT_ENABLE | VSP1_DLH_AUTO_START;
+	} else {
+		/*
+		 * Otherwise, in mem-to-mem mode, we work in single-shot mode
+		 * and the next display list must not be started automatically.
+		 */
+		dl->header->flags = VSP1_DLH_INT_ENABLE;
+	}
+
+	if (!dl->extension)
+		return;
+
+	dl->extension->flags = 0;
+
+	if (dl->pre_cmd) {
+		dl->extension->pre_ext_dl_plist = dl->pre_cmd->cmd_dma;
+		dl->extension->pre_ext_dl_num_cmd = dl->pre_cmd->num_cmds;
+		dl->extension->flags |= VSP1_DLH_EXT_PRE_CMD_EXEC;
+
+		vsp1_dl_ext_cmd_fill_header(dl->pre_cmd);
+	}
+
+	if (dl->post_cmd) {
+		dl->extension->post_ext_dl_plist = dl->post_cmd->cmd_dma;
+		dl->extension->post_ext_dl_num_cmd = dl->post_cmd->num_cmds;
+		dl->extension->flags |= VSP1_DLH_EXT_POST_CMD_EXEC;
+
+		vsp1_dl_ext_cmd_fill_header(dl->post_cmd);
+	}
+}
+
+static bool vsp1_dl_list_hw_update_pending(struct vsp1_dl_manager *dlm)
+{
+	struct vsp1_device *vsp1 = dlm->vsp1;
+
+	if (!dlm->queued)
+		return false;
+
+	/*
+	 * Check whether the VSP1 has taken the update. The hardware indicates
+	 * this by clearing the UPDHDR bit in the CMD register.
+	 */
+	return !!(vsp1_read(vsp1, VI6_CMD(dlm->index)) & VI6_CMD_UPDHDR);
+}
+
+static void vsp1_dl_list_hw_enqueue(struct vsp1_dl_list *dl)
+{
+	struct vsp1_dl_manager *dlm = dl->dlm;
+	struct vsp1_device *vsp1 = dlm->vsp1;
+
+	/*
+	 * Program the display list header address. If the hardware is idle
+	 * (single-shot mode or first frame in continuous mode) it will then be
+	 * started independently. If the hardware is operating, the
+	 * VI6_DL_HDR_REF_ADDR register will be updated with the display list
+	 * address.
+	 */
+	vsp1_write(vsp1, VI6_DL_HDR_ADDR(dlm->index), dl->dma);
+}
+
+static void vsp1_dl_list_commit_continuous(struct vsp1_dl_list *dl)
+{
+	struct vsp1_dl_manager *dlm = dl->dlm;
+
+	/*
+	 * If a previous display list has been queued to the hardware but not
+	 * processed yet, the VSP can start processing it at any time. In that
+	 * case we can't replace the queued list by the new one, as we could
+	 * race with the hardware. We thus mark the update as pending, it will
+	 * be queued up to the hardware by the frame end interrupt handler.
+	 *
+	 * If a display list is already pending we simply drop it as the new
+	 * display list is assumed to contain a more recent configuration. It is
+	 * an error if the already pending list has the internal flag set, as
+	 * there is then a process waiting for that list to complete. This
+	 * shouldn't happen as the waiting process should perform proper
+	 * locking, but warn just in case.
+	 */
+	if (vsp1_dl_list_hw_update_pending(dlm)) {
+		WARN_ON(dlm->pending && dlm->pending->internal);
+		__vsp1_dl_list_put(dlm->pending);
+		dlm->pending = dl;
+		return;
+	}
+
+	/*
+	 * Pass the new display list to the hardware and mark it as queued. It
+	 * will become active when the hardware starts processing it.
+	 */
+	vsp1_dl_list_hw_enqueue(dl);
+
+	__vsp1_dl_list_put(dlm->queued);
+	dlm->queued = dl;
+}
+
+static void vsp1_dl_list_commit_singleshot(struct vsp1_dl_list *dl)
+{
+	struct vsp1_dl_manager *dlm = dl->dlm;
+
+	/*
+	 * When working in single-shot mode, the caller guarantees that the
+	 * hardware is idle at this point. Just commit the head display list
+	 * to hardware. Chained lists will be started automatically.
+	 */
+	vsp1_dl_list_hw_enqueue(dl);
+
+	dlm->active = dl;
+}
+
+void vsp1_dl_list_commit(struct vsp1_dl_list *dl, bool internal)
+{
+	struct vsp1_dl_manager *dlm = dl->dlm;
+	struct vsp1_dl_list *dl_next;
+	unsigned long flags;
+
+	/* Fill the header for the head and chained display lists. */
+	vsp1_dl_list_fill_header(dl, list_empty(&dl->chain));
+
+	list_for_each_entry(dl_next, &dl->chain, chain) {
+		bool last = list_is_last(&dl_next->chain, &dl->chain);
+
+		vsp1_dl_list_fill_header(dl_next, last);
+	}
+
+	dl->internal = internal;
+
+	spin_lock_irqsave(&dlm->lock, flags);
+
+	if (dlm->singleshot)
+		vsp1_dl_list_commit_singleshot(dl);
+	else
+		vsp1_dl_list_commit_continuous(dl);
+
+	spin_unlock_irqrestore(&dlm->lock, flags);
+}
+
+/* -----------------------------------------------------------------------------
+ * Display List Manager
+ */
+
+/**
+ * vsp1_dlm_irq_frame_end - Display list handler for the frame end interrupt
+ * @dlm: the display list manager
+ *
+ * Return a set of flags that indicates display list completion status.
+ *
+ * The VSP1_DL_FRAME_END_COMPLETED flag indicates that the previous display list
+ * has completed at frame end. If the flag is not returned display list
+ * completion has been delayed by one frame because the display list commit
+ * raced with the frame end interrupt. The function always returns with the flag
+ * set in single-shot mode as display list processing is then not continuous and
+ * races never occur.
+ *
+ * The VSP1_DL_FRAME_END_INTERNAL flag indicates that the previous display list
+ * has completed and had been queued with the internal notification flag.
+ * Internal notification is only supported for continuous mode.
+ */
+unsigned int vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
+{
+	struct vsp1_device *vsp1 = dlm->vsp1;
+	u32 status = vsp1_read(vsp1, VI6_STATUS);
+	unsigned int flags = 0;
+
+	spin_lock(&dlm->lock);
+
+	/*
+	 * The mem-to-mem pipelines work in single-shot mode. No new display
+	 * list can be queued, we don't have to do anything.
+	 */
+	if (dlm->singleshot) {
+		__vsp1_dl_list_put(dlm->active);
+		dlm->active = NULL;
+		flags |= VSP1_DL_FRAME_END_COMPLETED;
+		goto done;
+	}
+
+	/*
+	 * If the commit operation raced with the interrupt and occurred after
+	 * the frame end event but before interrupt processing, the hardware
+	 * hasn't taken the update into account yet. We have to skip one frame
+	 * and retry.
+	 */
+	if (vsp1_dl_list_hw_update_pending(dlm))
+		goto done;
+
+	/*
+	 * Progressive streams report only TOP fields. If we have a BOTTOM
+	 * field, we are interlaced, and expect the frame to complete on the
+	 * next frame end interrupt.
+	 */
+	if (status & VI6_STATUS_FLD_STD(dlm->index))
+		goto done;
+
+	/*
+	 * The device starts processing the queued display list right after the
+	 * frame end interrupt. The display list thus becomes active.
+	 */
+	if (dlm->queued) {
+		if (dlm->queued->internal)
+			flags |= VSP1_DL_FRAME_END_INTERNAL;
+		dlm->queued->internal = false;
+
+		__vsp1_dl_list_put(dlm->active);
+		dlm->active = dlm->queued;
+		dlm->queued = NULL;
+		flags |= VSP1_DL_FRAME_END_COMPLETED;
+	}
+
+	/*
+	 * Now that the VSP has started processing the queued display list, we
+	 * can queue the pending display list to the hardware if one has been
+	 * prepared.
+	 */
+	if (dlm->pending) {
+		vsp1_dl_list_hw_enqueue(dlm->pending);
+		dlm->queued = dlm->pending;
+		dlm->pending = NULL;
+	}
+
+done:
+	spin_unlock(&dlm->lock);
+
+	return flags;
+}
+
+/* Hardware Setup */
+void vsp1_dlm_setup(struct vsp1_device *vsp1)
+{
+	unsigned int i;
+	u32 ctrl = (256 << VI6_DL_CTRL_AR_WAIT_SHIFT)
+		 | VI6_DL_CTRL_DC2 | VI6_DL_CTRL_DC1 | VI6_DL_CTRL_DC0
+		 | VI6_DL_CTRL_DLE;
+	u32 ext_dl = (0x02 << VI6_DL_EXT_CTRL_POLINT_SHIFT)
+		   | VI6_DL_EXT_CTRL_DLPRI | VI6_DL_EXT_CTRL_EXT;
+
+	if (vsp1_feature(vsp1, VSP1_HAS_EXT_DL)) {
+		for (i = 0; i < vsp1->info->wpf_count; ++i)
+			vsp1_write(vsp1, VI6_DL_EXT_CTRL(i), ext_dl);
+	}
+
+	vsp1_write(vsp1, VI6_DL_CTRL, ctrl);
+	vsp1_write(vsp1, VI6_DL_SWAP, VI6_DL_SWAP_LWS);
+}
+
+void vsp1_dlm_reset(struct vsp1_dl_manager *dlm)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dlm->lock, flags);
+
+	__vsp1_dl_list_put(dlm->active);
+	__vsp1_dl_list_put(dlm->queued);
+	__vsp1_dl_list_put(dlm->pending);
+
+	spin_unlock_irqrestore(&dlm->lock, flags);
+
+	dlm->active = NULL;
+	dlm->queued = NULL;
+	dlm->pending = NULL;
+}
+
+struct vsp1_dl_body *vsp1_dlm_dl_body_get(struct vsp1_dl_manager *dlm)
+{
+	return vsp1_dl_body_get(dlm->pool);
+}
+
+struct vsp1_dl_manager *vsp1_dlm_create(struct vsp1_device *vsp1,
+					unsigned int index,
+					unsigned int prealloc)
+{
+	struct vsp1_dl_manager *dlm;
+	size_t header_size;
+	unsigned int i;
+
+	dlm = devm_kzalloc(vsp1->dev, sizeof(*dlm), GFP_KERNEL);
+	if (!dlm)
+		return NULL;
+
+	dlm->index = index;
+	dlm->singleshot = vsp1->info->uapi;
+	dlm->vsp1 = vsp1;
+
+	spin_lock_init(&dlm->lock);
+	INIT_LIST_HEAD(&dlm->free);
+
+	/*
+	 * Initialize the display list body and allocate DMA memory for the body
+	 * and the header. Both are allocated together to avoid memory
+	 * fragmentation, with the header located right after the body in
+	 * memory. An extra body is allocated on top of the prealloc to account
+	 * for the cached body used by the vsp1_pipeline object.
+	 */
+	header_size = vsp1_feature(vsp1, VSP1_HAS_EXT_DL) ?
+			sizeof(struct vsp1_dl_header_extended) :
+			sizeof(struct vsp1_dl_header);
+
+	header_size = ALIGN(header_size, 8);
+
+	dlm->pool = vsp1_dl_body_pool_create(vsp1, prealloc + 1,
+					     VSP1_DL_NUM_ENTRIES, header_size);
+	if (!dlm->pool)
+		return NULL;
+
+	for (i = 0; i < prealloc; ++i) {
+		struct vsp1_dl_list *dl;
+
+		dl = vsp1_dl_list_alloc(dlm);
+		if (!dl) {
+			vsp1_dlm_destroy(dlm);
+			return NULL;
+		}
+
+		/* The extended header immediately follows the header. */
+		if (vsp1_feature(vsp1, VSP1_HAS_EXT_DL))
+			dl->extension = (void *)dl->header
+				      + sizeof(*dl->header);
+
+		list_add_tail(&dl->list, &dlm->free);
+	}
+
+	if (vsp1_feature(vsp1, VSP1_HAS_EXT_DL)) {
+		dlm->cmdpool = vsp1_dl_cmd_pool_create(vsp1,
+					VSP1_EXTCMD_AUTOFLD, prealloc);
+		if (!dlm->cmdpool) {
+			vsp1_dlm_destroy(dlm);
+			return NULL;
+		}
+	}
+
+	return dlm;
+}
+
+void vsp1_dlm_destroy(struct vsp1_dl_manager *dlm)
+{
+	struct vsp1_dl_list *dl, *next;
+
+	if (!dlm)
+		return;
+
+	list_for_each_entry_safe(dl, next, &dlm->free, list) {
+		list_del(&dl->list);
+		vsp1_dl_list_free(dl);
+	}
+
+	vsp1_dl_body_pool_destroy(dlm->pool);
+	vsp1_dl_ext_cmd_pool_destroy(dlm->cmdpool);
+}