diff mbox

[V3,3/4] dmaengine: qcom_hidma: add support for the new revision

Message ID 1510281175-27173-3-git-send-email-okaya@codeaurora.org (mailing list archive)
State New, archived
Headers show

Commit Message

Sinan Kaya Nov. 10, 2017, 2:32 a.m. UTC 
Add support for probing the newer HW and also organize MSI capable hardware
into an array for maintenance reasons.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
---
 drivers/dma/qcom/hidma.c | 35 ++++++++++++++++-------------------
 1 file changed, 16 insertions(+), 19 deletions(-)

Comments

Vinod Koul Nov. 29, 2017, 1:58 p.m. UTC | #1 
On Thu, Nov 09, 2017 at 09:32:54PM -0500, Sinan Kaya wrote:

> -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;
> +	enum hidma_cap cap;
>  
> -	if (!adev || acpi_disabled) {
> -		ret = device_property_read_string(dev, "compatible",
> -						  &of_compat);
> -		if (ret)
> -			return false;
> +	if (!adev || acpi_disabled)
> +		cap = (enum hidma_cap) of_device_get_match_data(dev);
> +	else
> +		cap = (enum hidma_cap) acpi_device_get_match_data(dev);

should this not reside in core? How about a device_get_match_data() which
returns the data for folks based on node being acpi/of
Sinan Kaya Nov. 29, 2017, 10:14 p.m. UTC | #2 
+linux-acpi

On 11/29/2017 8:58 AM, Vinod Koul wrote:
>> +		cap = (enum hidma_cap) acpi_device_get_match_data(dev);
> should this not reside in core? How about a device_get_match_data() which
> returns the data for folks based on node being acpi/of

Sure,

I'm preparing a device function to read this as you suggested.

Sinan
diff mbox

Patch

diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index e366985..d9d8071 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -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 void hidma_free(struct hidma_dev *dmadev)
 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 +740,17 @@  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;
+	enum hidma_cap cap;
 
-	if (!adev || acpi_disabled) {
-		ret = device_property_read_string(dev, "compatible",
-						  &of_compat);
-		if (ret)
-			return false;
+	if (!adev || acpi_disabled)
+		cap = (enum hidma_cap) of_device_get_match_data(dev);
+	else
+		cap = (enum hidma_cap) acpi_device_get_match_data(dev);
 
-		ret = strcmp(of_compat, "qcom,hidma-1.1");
-	} else {
-#ifdef CONFIG_ACPI
-		ret = strcmp(acpi_device_hid(adev), "QCOM8062");
-#endif
-	}
-	return ret == 0;
+	return cap ? ((cap & test_cap) > 0) : 0;
 }
 
 static int hidma_probe(struct platform_device *pdev)
@@ -834,8 +830,7 @@  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 +948,8 @@  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 +957,8 @@  static int hidma_remove(struct platform_device *pdev)
 
 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);