Commit 95fbfb7a authored by Sinan Kaya's avatar Sinan Kaya Committed by Vinod Koul
Browse files

dmaengine: qcom_hidma: Add support for the new revision 



Add support for probing the newer HW and also organize MSI capable hardware
into an array for maintenance reasons.

Signed-off-by: default avatarSinan Kaya <okaya@codeaurora.org>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent afc996a3

drivers/dma/qcom/hidma.c

+13 −21
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ 
#include <linux/slab.h>

#include <linux/spinlock.h>

#include <linux/of_dma.h>

#include <linux/of_device.h>

#include <linux/property.h>

#include <linux/delay.h>

#include <linux/acpi.h>
@@ -104,6 +105,9 @@ static unsigned int nr_desc_prm; 
module_param(nr_desc_prm, uint, 0644);

MODULE_PARM_DESC(nr_desc_prm, "number of descriptors (default: 0)");



enum hidma_cap {

	HIDMA_MSI_CAP = 1,

};



/* process completed descriptors */

static void hidma_process_completed(struct hidma_chan *mchan)
@@ -736,25 +740,12 @@ static int hidma_request_msi(struct hidma_dev *dmadev, 
#endif

}



static bool hidma_msi_capable(struct device *dev)

static bool hidma_test_capability(struct device *dev, enum hidma_cap test_cap)

{

	struct acpi_device *adev = ACPI_COMPANION(dev);

	const char *of_compat;

	int ret = -EINVAL;



	if (!adev || acpi_disabled) {

		ret = device_property_read_string(dev, "compatible",

						  &of_compat);

		if (ret)

			return false;

	enum hidma_cap cap;



		ret = strcmp(of_compat, "qcom,hidma-1.1");

	} else {

#ifdef CONFIG_ACPI

		ret = strcmp(acpi_device_hid(adev), "QCOM8062");

#endif

	}

	return ret == 0;

	cap = (enum hidma_cap) device_get_match_data(dev);

	return cap ? ((cap & test_cap) > 0) : 0;

}



static int hidma_probe(struct platform_device *pdev)
@@ -834,8 +825,7 @@ static int hidma_probe(struct platform_device *pdev) 
	 * Determine the MSI capability of the platform. Old HW doesn't

	 * support MSI.

	 */

	msi = hidma_msi_capable(&pdev->dev);



	msi = hidma_test_capability(&pdev->dev, HIDMA_MSI_CAP);

	device_property_read_u32(&pdev->dev, "desc-count",

				 &dmadev->nr_descriptors);
@@ -953,7 +943,8 @@ static int hidma_remove(struct platform_device *pdev) 
#if IS_ENABLED(CONFIG_ACPI)

static const struct acpi_device_id hidma_acpi_ids[] = {

	{"QCOM8061"},

	{"QCOM8062"},

	{"QCOM8062", HIDMA_MSI_CAP},

	{"QCOM8063", HIDMA_MSI_CAP},

	{},

};

MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@@ -961,7 +952,8 @@ MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids); 


static const struct of_device_id hidma_match[] = {

	{.compatible = "qcom,hidma-1.0",},

	{.compatible = "qcom,hidma-1.1",},

	{.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},

	{.compatible = "qcom,hidma-1.2", .data = (void *)(HIDMA_MSI_CAP),},

	{},

};

MODULE_DEVICE_TABLE(of, hidma_match);