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Message-id: <1409054988-32758-6-git-send-email-m.szyprowski@samsung.com>
Date: Tue, 26 Aug 2014 14:09:46 +0200
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org
Cc: Marek Szyprowski <m.szyprowski@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
linaro-mm-sig@...ts.linaro.org, linux-media@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Michal Nazarewicz <mina86@...a86.com>,
Grant Likely <grant.likely@...aro.org>,
Tomasz Figa <t.figa@...sung.com>,
Laura Abbott <lauraa@...eaurora.org>,
Josh Cartwright <joshc@...eaurora.org>,
Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH 5/7] media: s5p-mfc: replace custom reserved memory init code
with generic one
This patch removes custom initialization of reserved memory regions from
s5p-mfc driver and adds a new code for handling reserved memory with
generic named reserved memory regions read from device tree.
s5p-mfc driver now handles two reserved memory regions: "left" and
"right", defined by generic reserved memory bindings. Support for non-dt
platform has been removed, because all supported platforms have been
converted to device tree.
Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
drivers/media/platform/s5p-mfc/s5p_mfc.c | 102 +++++++++++--------------------
1 file changed, 35 insertions(+), 67 deletions(-)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index d35b0418ab37..668e82247a3f 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -22,6 +22,7 @@
#include <media/v4l2-event.h>
#include <linux/workqueue.h>
#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
#include <media/videobuf2-core.h>
#include "s5p_mfc_common.h"
#include "s5p_mfc_ctrl.h"
@@ -996,55 +997,40 @@ static const struct v4l2_file_operations s5p_mfc_fops = {
.mmap = s5p_mfc_mmap,
};
-static int match_child(struct device *dev, void *data)
+static struct device *s5p_mfc_alloc_memdev(struct device *dev, const char *name)
{
- if (!dev_name(dev))
- return 0;
- return !strcmp(dev_name(dev), (char *)data);
-}
-
-static void *mfc_get_drv_data(struct platform_device *pdev);
-
-static int s5p_mfc_alloc_memdevs(struct s5p_mfc_dev *dev)
-{
- unsigned int mem_info[2] = { };
+ struct device *child;
+ int ret;
- dev->mem_dev_l = devm_kzalloc(&dev->plat_dev->dev,
- sizeof(struct device), GFP_KERNEL);
- if (!dev->mem_dev_l) {
- mfc_err("Not enough memory\n");
- return -ENOMEM;
- }
- device_initialize(dev->mem_dev_l);
- of_property_read_u32_array(dev->plat_dev->dev.of_node,
- "samsung,mfc-l", mem_info, 2);
- if (dma_declare_coherent_memory(dev->mem_dev_l, mem_info[0],
- mem_info[0], mem_info[1],
- DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) {
- mfc_err("Failed to declare coherent memory for\n"
- "MFC device\n");
- return -ENOMEM;
+ child = devm_kzalloc(dev, sizeof(struct device), GFP_KERNEL);
+ if (!child)
+ return NULL;
+
+ device_initialize(child);
+ dev_set_name(child, "%s:%s", dev_name(dev), name);
+ child->parent = dev;
+ child->bus = dev->bus;
+ child->coherent_dma_mask = dev->coherent_dma_mask;
+ child->dma_mask = dev->dma_mask;
+
+ if (device_add(child) == 0) {
+ ret = of_reserved_mem_device_init(child);
+ if (ret == 0)
+ return child;
}
- dev->mem_dev_r = devm_kzalloc(&dev->plat_dev->dev,
- sizeof(struct device), GFP_KERNEL);
- if (!dev->mem_dev_r) {
- mfc_err("Not enough memory\n");
- return -ENOMEM;
- }
- device_initialize(dev->mem_dev_r);
- of_property_read_u32_array(dev->plat_dev->dev.of_node,
- "samsung,mfc-r", mem_info, 2);
- if (dma_declare_coherent_memory(dev->mem_dev_r, mem_info[0],
- mem_info[0], mem_info[1],
- DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) {
- pr_err("Failed to declare coherent memory for\n"
- "MFC device\n");
- return -ENOMEM;
- }
- return 0;
+ put_device(child);
+ return NULL;
}
+void s5p_mfc_free_memdev(struct device *dev)
+{
+ of_reserved_mem_device_release(dev);
+ put_device(dev);
+}
+
+static void *mfc_get_drv_data(struct platform_device *pdev);
+
/* MFC probe function */
static int s5p_mfc_probe(struct platform_device *pdev)
{
@@ -1096,26 +1082,8 @@ static int s5p_mfc_probe(struct platform_device *pdev)
goto err_res;
}
- if (pdev->dev.of_node) {
- ret = s5p_mfc_alloc_memdevs(dev);
- if (ret < 0)
- goto err_res;
- } else {
- dev->mem_dev_l = device_find_child(&dev->plat_dev->dev,
- "s5p-mfc-l", match_child);
- if (!dev->mem_dev_l) {
- mfc_err("Mem child (L) device get failed\n");
- ret = -ENODEV;
- goto err_res;
- }
- dev->mem_dev_r = device_find_child(&dev->plat_dev->dev,
- "s5p-mfc-r", match_child);
- if (!dev->mem_dev_r) {
- mfc_err("Mem child (R) device get failed\n");
- ret = -ENODEV;
- goto err_res;
- }
- }
+ dev->mem_dev_l = s5p_mfc_alloc_memdev(&dev->plat_dev->dev, "left");
+ dev->mem_dev_r = s5p_mfc_alloc_memdev(&dev->plat_dev->dev, "right");
dev->alloc_ctx[0] = vb2_dma_contig_init_ctx(dev->mem_dev_l);
if (IS_ERR(dev->alloc_ctx[0])) {
@@ -1246,10 +1214,10 @@ static int s5p_mfc_remove(struct platform_device *pdev)
s5p_mfc_release_firmware(dev);
vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]);
vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]);
- if (pdev->dev.of_node) {
- put_device(dev->mem_dev_l);
- put_device(dev->mem_dev_r);
- }
+ if (dev->mem_dev_l)
+ s5p_mfc_free_memdev(dev->mem_dev_l);
+ if (dev->mem_dev_r)
+ s5p_mfc_free_memdev(dev->mem_dev_r);
s5p_mfc_final_pm(dev);
return 0;
--
1.9.2
--
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