[PATCH v12 1/6] staging: vc04_services: bcm2835-camera: Explicitly set DMA mask

[Umang Jain <umang.jain@ideasonboard.com>]

In the following patches, vchiq_arm will be migrated to create and use
its own bus and all the vchiq drivers (bcm2835-camera, bcm2835-audio)
will be registered to it. Since the platform driver/device model
internally sets the DMA mask for its registered devices, we would have
to do it ourself when we remove the platform driver/device registration
for vchiq devices.

This patch explicitly sets the DMA mask to bcm2835-camera so as not
to introduce a regression when we move away from platform
device/driver model.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
---
 .../staging/vc04_services/bcm2835-camera/bcm2835-camera.c   | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
index 346d00df815a..fcad5118f3e8 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -1852,6 +1852,12 @@ static int bcm2835_mmal_probe(struct platform_device *pdev)
 	unsigned int resolutions[MAX_BCM2835_CAMERAS][2];
 	int i;
 
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(&pdev->dev, "dma_set_mask_and_coherent failed: %d\n", ret);
+		return ret;
+	}
+
 	ret = vchiq_mmal_init(&instance);
 	if (ret < 0)
 		return ret;
-- 
2.40.1