From a8c16b7593bd1a4e613164a47c526ca9d1be764b Mon Sep 17 00:00:00 2001
From: Mihail Atanassov <Mihail.Atanassov@arm.com>
Date: Mon, 5 Aug 2019 09:56:25 +0000
Subject: drm/komeda: Add support for 'memory-region' DT node property
Git-commit: a8c16b7593bd1a4e613164a47c526ca9d1be764b
Patch-mainline: v5.4-rc1
References: bsc#1152472
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/
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -153,6 +153,12 @@ static int komeda_parse_dt(struct device
return ret;
ret = 0;
+ /* 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);
@@ -301,6 +307,8 @@ void komeda_dev_destroy(struct komeda_de
of_reserved_mem_device_release(dev);
+ of_reserved_mem_device_release(dev);
+
if (funcs && funcs->cleanup)
funcs->cleanup(mdev);