[PATCH 03/14] media: sun6i-csi: Support an optional dedicated memory pool

Paul Kocialkowski paul.kocialkowski at bootlin.com
Fri Oct 23 17:45:35 UTC 2020


This allows selecting a dedicated CMA memory pool (specified via
device-tree) instead of the default one.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
---
 drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index 28e89340fed9..5d2389a5cd17 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
@@ -849,6 +850,12 @@ static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
 		return PTR_ERR(sdev->regmap);
 	}
 
+	ret = of_reserved_mem_device_init(&pdev->dev);
+	if (ret && ret != -ENODEV) {
+		dev_err(&pdev->dev, "Unable to init reserved memory\n");
+		return ret;
+	}
+
 	sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");
 	if (IS_ERR(sdev->clk_mod)) {
 		dev_err(&pdev->dev, "Unable to acquire csi clock\n");
@@ -917,6 +924,7 @@ static int sun6i_csi_remove(struct platform_device *pdev)
 	struct sun6i_csi_dev *sdev = platform_get_drvdata(pdev);
 
 	sun6i_csi_v4l2_cleanup(&sdev->csi);
+	of_reserved_mem_device_release(sdev->dev);
 
 	return 0;
 }
-- 
2.28.0



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