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Message-ID: <20190805095408.21285-1-mihail.atanassov@arm.com>
Date: Mon, 5 Aug 2019 09:56:25 +0000
From: Mihail Atanassov <Mihail.Atanassov@....com>
To: "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
CC: nd <nd@....com>, Mihail Atanassov <Mihail.Atanassov@....com>,
"james qian wang (Arm Technology China)" <james.qian.wang@....com>,
Liviu Dudau <Liviu.Dudau@....com>,
Brian Starkey <Brian.Starkey@....com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v2.1] drm/komeda: Add support for 'memory-region' DT node
property
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@....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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