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drm/komeda: Add support for 'memory-region' DT node property

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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>
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190805095408.21285-1-mihail.atanassov@arm.com
This commit is contained in:
Mihail Atanassov 2019-08-05 09:56:25 +00:00 committed by james qian wang (Arm Technology China)
parent a9577f1921
commit 8f1c748b9a
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/arm/display/komeda/komeda_dev.c
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@ -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
@ -143,6 +144,12 @@ 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);
@ -289,6 +296,8 @@ 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);