3 files changed, 64 insertions, 6 deletions

diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index 5072a7d306d4..34fb6afd229b 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -1,7 +1,7 @@
 /*
  * Qualcomm Technologies HIDMA DMA engine interface
  *
- * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -210,6 +210,7 @@ static int hidma_chan_init(struct hidma_dev *dmadev, u32 dma_sig)
 	INIT_LIST_HEAD(&mchan->prepared);
 	INIT_LIST_HEAD(&mchan->active);
 	INIT_LIST_HEAD(&mchan->completed);
+	INIT_LIST_HEAD(&mchan->queued);
 
 	spin_lock_init(&mchan->lock);
 	list_add_tail(&mchan->chan.device_node, &ddev->channels);
@@ -230,9 +231,15 @@ static void hidma_issue_pending(struct dma_chan *dmach)
 	struct hidma_chan *mchan = to_hidma_chan(dmach);
 	struct hidma_dev *dmadev = mchan->dmadev;
 	unsigned long flags;
+	struct hidma_desc *qdesc, *next;
 	int status;
 
 	spin_lock_irqsave(&mchan->lock, flags);
+	list_for_each_entry_safe(qdesc, next, &mchan->queued, node) {
+		hidma_ll_queue_request(dmadev->lldev, qdesc->tre_ch);
+		list_move_tail(&qdesc->node, &mchan->active);
+	}
+
 	if (!mchan->running) {
 		struct hidma_desc *desc = list_first_entry(&mchan->active,
 							   struct hidma_desc,
@@ -315,17 +322,18 @@ static dma_cookie_t hidma_tx_submit(struct dma_async_tx_descriptor *txd)
 		pm_runtime_put_autosuspend(dmadev->ddev.dev);
 		return -ENODEV;
 	}
+	pm_runtime_mark_last_busy(dmadev->ddev.dev);
+	pm_runtime_put_autosuspend(dmadev->ddev.dev);
 
 	mdesc = container_of(txd, struct hidma_desc, desc);
 	spin_lock_irqsave(&mchan->lock, irqflags);
 
-	/* Move descriptor to active */
-	list_move_tail(&mdesc->node, &mchan->active);
+	/* Move descriptor to queued */
+	list_move_tail(&mdesc->node, &mchan->queued);
 
 	/* Update cookie */
 	cookie = dma_cookie_assign(txd);
 
-	hidma_ll_queue_request(dmadev->lldev, mdesc->tre_ch);
 	spin_unlock_irqrestore(&mchan->lock, irqflags);
 
 	return cookie;
@@ -431,6 +439,7 @@ static int hidma_terminate_channel(struct dma_chan *chan)
 	list_splice_init(&mchan->active, &list);
 	list_splice_init(&mchan->prepared, &list);
 	list_splice_init(&mchan->completed, &list);
+	list_splice_init(&mchan->queued, &list);
 	spin_unlock_irqrestore(&mchan->lock, irqflags);
 
 	/* this suspends the existing transfer */
@@ -795,8 +804,11 @@ static int hidma_probe(struct platform_device *pdev)
 	device_property_read_u32(&pdev->dev, "desc-count",
 				 &dmadev->nr_descriptors);
 
-	if (!dmadev->nr_descriptors && nr_desc_prm)
+	if (nr_desc_prm) {
+		dev_info(&pdev->dev, "overriding number of descriptors as %d\n",
+			 nr_desc_prm);
 		dmadev->nr_descriptors = nr_desc_prm;
+	}
 
 	if (!dmadev->nr_descriptors)
 		dmadev->nr_descriptors = HIDMA_NR_DEFAULT_DESC;
diff --git a/drivers/dma/qcom/hidma.h b/drivers/dma/qcom/hidma.h
index c7d014235c32..41e0aa283828 100644
--- a/drivers/dma/qcom/hidma.h
+++ b/drivers/dma/qcom/hidma.h
@@ -104,6 +104,7 @@ struct hidma_chan {
 	struct dma_chan			chan;
 	struct list_head		free;
 	struct list_head		prepared;
+	struct list_head		queued;
 	struct list_head		active;
 	struct list_head		completed;
 
diff --git a/drivers/dma/qcom/hidma_mgmt.c b/drivers/dma/qcom/hidma_mgmt.c
index f847d32cc4b5..5a0991bc4787 100644
--- a/drivers/dma/qcom/hidma_mgmt.c
+++ b/drivers/dma/qcom/hidma_mgmt.c
@@ -1,7 +1,7 @@
 /*
  * Qualcomm Technologies HIDMA DMA engine Management interface
  *
- * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -49,6 +49,26 @@
 #define HIDMA_AUTOSUSPEND_TIMEOUT	2000
 #define HIDMA_MAX_CHANNEL_WEIGHT	15
 
+static unsigned int max_write_request;
+module_param(max_write_request, uint, 0644);
+MODULE_PARM_DESC(max_write_request,
+		"maximum write burst (default: ACPI/DT value)");
+
+static unsigned int max_read_request;
+module_param(max_read_request, uint, 0644);
+MODULE_PARM_DESC(max_read_request,
+		"maximum read burst (default: ACPI/DT value)");
+
+static unsigned int max_wr_xactions;
+module_param(max_wr_xactions, uint, 0644);
+MODULE_PARM_DESC(max_wr_xactions,
+	"maximum number of write transactions (default: ACPI/DT value)");
+
+static unsigned int max_rd_xactions;
+module_param(max_rd_xactions, uint, 0644);
+MODULE_PARM_DESC(max_rd_xactions,
+	"maximum number of read transactions (default: ACPI/DT value)");
+
 int hidma_mgmt_setup(struct hidma_mgmt_dev *mgmtdev)
 {
 	unsigned int i;
@@ -207,12 +227,25 @@ static int hidma_mgmt_probe(struct platform_device *pdev)
 		goto out;
 	}
 
+	if (max_write_request) {
+		dev_info(&pdev->dev, "overriding max-write-burst-bytes: %d\n",
+			max_write_request);
+		mgmtdev->max_write_request = max_write_request;
+	} else
+		max_write_request = mgmtdev->max_write_request;
+
 	rc = device_property_read_u32(&pdev->dev, "max-read-burst-bytes",
 				      &mgmtdev->max_read_request);
 	if (rc) {
 		dev_err(&pdev->dev, "max-read-burst-bytes missing\n");
 		goto out;
 	}
+	if (max_read_request) {
+		dev_info(&pdev->dev, "overriding max-read-burst-bytes: %d\n",
+			max_read_request);
+		mgmtdev->max_read_request = max_read_request;
+	} else
+		max_read_request = mgmtdev->max_read_request;
 
 	rc = device_property_read_u32(&pdev->dev, "max-write-transactions",
 				      &mgmtdev->max_wr_xactions);
@@ -220,6 +253,12 @@ static int hidma_mgmt_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "max-write-transactions missing\n");
 		goto out;
 	}
+	if (max_wr_xactions) {
+		dev_info(&pdev->dev, "overriding max-write-transactions: %d\n",
+			max_wr_xactions);
+		mgmtdev->max_wr_xactions = max_wr_xactions;
+	} else
+		max_wr_xactions = mgmtdev->max_wr_xactions;
 
 	rc = device_property_read_u32(&pdev->dev, "max-read-transactions",
 				      &mgmtdev->max_rd_xactions);
@@ -227,6 +266,12 @@ static int hidma_mgmt_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "max-read-transactions missing\n");
 		goto out;
 	}
+	if (max_rd_xactions) {
+		dev_info(&pdev->dev, "overriding max-read-transactions: %d\n",
+			max_rd_xactions);
+		mgmtdev->max_rd_xactions = max_rd_xactions;
+	} else
+		max_rd_xactions = mgmtdev->max_rd_xactions;
 
 	mgmtdev->priority = devm_kcalloc(&pdev->dev,
 					 mgmtdev->dma_channels,