The 'memory-region' property of the komeda display driver DT binding allows the use of a 'reserved-memory' node for buffer allocations. Add the requisite of_reserved_mem_device_{init,release} calls to actually make use of the memory if present.
Changes since v1: - Move handling inside komeda_parse_dt
Signed-off-by: Mihail Atanassov mihail.atanassov@arm.com --- drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c index 1ff7f4b2c620..0142ee991957 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c @@ -8,6 +8,7 @@ #include <linux/iommu.h> #include <linux/of_device.h> #include <linux/of_graph.h> +#include <linux/of_reserved_mem.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> #ifdef CONFIG_DEBUG_FS @@ -146,6 +147,12 @@ static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev) return mdev->irq; }
+/* Get the optional framebuffer memory resource */ +ret = of_reserved_mem_device_init(dev); +if (ret && ret != -ENODEV) +return ret; +ret = 0; + for_each_available_child_of_node(np, child) { if (of_node_cmp(child->name, "pipeline") == 0) { ret = komeda_parse_pipe_dt(mdev, child); @@ -292,6 +299,8 @@ void komeda_dev_destroy(struct komeda_dev *mdev)
mdev->n_pipelines = 0;
+of_reserved_mem_device_release(dev); + if (funcs && funcs->cleanup) funcs->cleanup(mdev);
-- 2.22.0
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