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media: s5p-mfc: replace custom reserved memory handling code with generic one

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This patch removes custom code for initialization and handling of
reserved memory regions in s5p-mfc driver and replaces it with generic
reserved memory regions api.

s5p-mfc driver now handles two reserved memory regions defined by
generic reserved memory bindings. Support for non-dt platform has been
removed, because all supported platforms have been already converted to
device tree.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
This commit is contained in:
Marek Szyprowski 2016-05-24 15:31:26 +02:00 committed by Sylwester Nawrocki
parent 6a8d73e285
commit c79667dd93
1 changed files with 71 additions and 83 deletions
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154
drivers/media/platform/s5p-mfc/s5p_mfc.c
View File

@ -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-v4l2.h>
#include "s5p_mfc_common.h"
#include "s5p_mfc_ctrl.h"
@ -1043,66 +1044,71 @@ static const struct v4l2_file_operations s5p_mfc_fops = {
.mmap = s5p_mfc_mmap,
};
static int match_child(struct device *dev, void *data)
{
if (!dev_name(dev))
return 0;
return !strcmp(dev_name(dev), (char *)data);
}
/* DMA memory related helper functions */
static void s5p_mfc_memdev_release(struct device *dev)
{
dma_release_declared_memory(dev);
of_reserved_mem_device_release(dev);
}
static struct device *s5p_mfc_alloc_memdev(struct device *dev,
const char *name, unsigned int idx)
{
struct device *child;
int ret;
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;
child->release = s5p_mfc_memdev_release;
if (device_add(child) == 0) {
ret = of_reserved_mem_device_init_by_idx(child, dev->of_node,
idx);
if (ret == 0)
return child;
}
put_device(child);
return NULL;
}
static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
{
struct device *dev = &mfc_dev->plat_dev->dev;
/*
* Create and initialize virtual devices for accessing
* reserved memory regions.
*/
mfc_dev->mem_dev_l = s5p_mfc_alloc_memdev(dev, "left",
MFC_BANK1_ALLOC_CTX);
if (!mfc_dev->mem_dev_l)
return -ENODEV;
mfc_dev->mem_dev_r = s5p_mfc_alloc_memdev(dev, "right",
MFC_BANK2_ALLOC_CTX);
if (!mfc_dev->mem_dev_r) {
device_unregister(mfc_dev->mem_dev_l);
return -ENODEV;
}
return 0;
}
static void s5p_mfc_unconfigure_dma_memory(struct s5p_mfc_dev *mfc_dev)
{
device_unregister(mfc_dev->mem_dev_l);
device_unregister(mfc_dev->mem_dev_r);
}
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] = { };
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;
}
dev_set_name(dev->mem_dev_l, "%s", "s5p-mfc-l");
dev->mem_dev_l->release = s5p_mfc_memdev_release;
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;
}
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;
}
dev_set_name(dev->mem_dev_r, "%s", "s5p-mfc-r");
dev->mem_dev_r->release = s5p_mfc_memdev_release;
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;
}
/* MFC probe function */
static int s5p_mfc_probe(struct platform_device *pdev)
{
@ -1128,12 +1134,6 @@ static int s5p_mfc_probe(struct platform_device *pdev)
dev->variant = mfc_get_drv_data(pdev);
ret = s5p_mfc_init_pm(dev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get mfc clock source\n");
return ret;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
@ -1154,25 +1154,16 @@ 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;
}
ret = s5p_mfc_configure_dma_memory(dev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to configure DMA memory\n");
return ret;
}
ret = s5p_mfc_init_pm(dev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get mfc clock source\n");
return ret;
}
vb2_dma_contig_set_max_seg_size(dev->mem_dev_l, DMA_BIT_MASK(32));
@ -1309,12 +1300,9 @@ 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]);
s5p_mfc_unconfigure_dma_memory(dev);
vb2_dma_contig_clear_max_seg_size(dev->mem_dev_l);
vb2_dma_contig_clear_max_seg_size(dev->mem_dev_r);
if (pdev->dev.of_node) {
put_device(dev->mem_dev_l);
put_device(dev->mem_dev_r);
}
s5p_mfc_final_pm(dev);
return 0;