diff options
Diffstat (limited to 'drivers/dma/qcom/hidma_mgmt.c')
| -rw-r--r-- | drivers/dma/qcom/hidma_mgmt.c | 47 |
1 files changed, 46 insertions, 1 deletions
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, |