]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
drm/komeda: Add support for 'memory-region' DT node property
authorMihail Atanassov <Mihail.Atanassov@arm.com>
Mon, 5 Aug 2019 09:56:25 +0000 (09:56 +0000)
committerAyan kumar halder <ayan.halder@arm.com>
Tue, 20 Aug 2019 10:22:23 +0000 (11:22 +0100)
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>
Signed-off-by: Ayan Kumar Halder <ayan.halder@arm.com>
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Link:- https://patchwork.kernel.org/patch/11076413/

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

index 1ff7f4b2c6209f8e356311054ade0bf135c3cc15..0142ee99195779d5a5f7710d1b21f9232dd23d79 100644 (file)
@@ -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);