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media: coda: use genalloc API

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This patch depends on "genalloc: add devres support, allow to find a
managed pool by device", which provides the of_get_named_gen_pool and
dev_get_gen_pool functions.

Signed-off-by: Philipp Zabel <[email protected]>
Acked-by: Javier Martin <[email protected]>
Acked-by: Grant Likely <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Dong Aisheng <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Huang Shijie <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: Paul Gortmaker <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Shawn Guo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Philipp Zabel 2013-04-29 16:17:14 -07:00 • committed by Linus Torvalds
commit 657eee7d25
4 changed files with 79 additions and 15 deletions
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1
drivers/media/platform/Kconfig
View file

@ -145,7 +145,6 @@ config VIDEO_CODA
depends on VIDEO_DEV && VIDEO_V4L2 && ARCH_MXC
select VIDEOBUF2_DMA_CONTIG
select V4L2_MEM2MEM_DEV
select IRAM_ALLOC if SOC_IMX53
---help---
Coda is a range of video codec IPs that supports
H.264, MPEG-4, and other video formats.

45
drivers/media/platform/coda.c
View file

@ -14,6 +14,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/genalloc.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
@ -23,7 +24,7 @@
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/of.h>
#include <linux/platform_data/imx-iram.h>
#include <linux/platform_data/coda.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
@ -43,6 +44,7 @@
#define CODA7_WORK_BUF_SIZE (512 * 1024 + CODA_FMO_BUF_SIZE * 8 * 1024)
#define CODA_PARA_BUF_SIZE (10 * 1024)
#define CODA_ISRAM_SIZE (2048 * 2)
#define CODADX6_IRAM_SIZE 0xb000
#define CODA7_IRAM_SIZE 0x14000 /* 81920 bytes */
#define CODA_MAX_FRAMEBUFFERS 2
@ -128,7 +130,10 @@ struct coda_dev {
struct coda_aux_buf codebuf;
struct coda_aux_buf workbuf;
struct gen_pool *iram_pool;
long unsigned int iram_vaddr;
long unsigned int iram_paddr;
unsigned long iram_size;
spinlock_t irqlock;
struct mutex dev_mutex;
@ -1926,6 +1931,9 @@ static int coda_probe(struct platform_device *pdev)
const struct of_device_id *of_id =
of_match_device(of_match_ptr(coda_dt_ids), &pdev->dev);
const struct platform_device_id *pdev_id;
struct coda_platform_data *pdata = pdev->dev.platform_data;
struct device_node *np = pdev->dev.of_node;
struct gen_pool *pool;
struct coda_dev *dev;
struct resource *res;
int ret, irq;
@ -1988,6 +1996,16 @@ static int coda_probe(struct platform_device *pdev)
return -ENOENT;
}
/* Get IRAM pool from device tree or platform data */
pool = of_get_named_gen_pool(np, "iram", 0);
if (!pool && pdata)
pool = dev_get_gen_pool(pdata->iram_dev);
if (!pool) {
dev_err(&pdev->dev, "iram pool not available\n");
return -ENOMEM;
}
dev->iram_pool = pool;
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
if (ret)
return ret;
@ -2022,18 +2040,17 @@ static int coda_probe(struct platform_device *pdev)
return -ENOMEM;
}
if (dev->devtype->product == CODA_DX6) {
dev->iram_paddr = 0xffff4c00;
} else {
void __iomem *iram_vaddr;
iram_vaddr = iram_alloc(CODA7_IRAM_SIZE,
&dev->iram_paddr);
if (!iram_vaddr) {
dev_err(&pdev->dev, "unable to alloc iram\n");
return -ENOMEM;
}
if (dev->devtype->product == CODA_DX6)
dev->iram_size = CODADX6_IRAM_SIZE;
else
dev->iram_size = CODA7_IRAM_SIZE;
dev->iram_vaddr = gen_pool_alloc(dev->iram_pool, dev->iram_size);
if (!dev->iram_vaddr) {
dev_err(&pdev->dev, "unable to alloc iram\n");
return -ENOMEM;
}
dev->iram_paddr = gen_pool_virt_to_phys(dev->iram_pool,
dev->iram_vaddr);
platform_set_drvdata(pdev, dev);
@ -2050,8 +2067,8 @@ static int coda_remove(struct platform_device *pdev)
if (dev->alloc_ctx)
vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
v4l2_device_unregister(&dev->v4l2_dev);
if (dev->iram_paddr)
iram_free(dev->iram_paddr, CODA7_IRAM_SIZE);
if (dev->iram_vaddr)
gen_pool_free(dev->iram_pool, dev->iram_vaddr, dev->iram_size);
if (dev->codebuf.vaddr)
dma_free_coherent(&pdev->dev, dev->codebuf.size,
&dev->codebuf.vaddr, dev->codebuf.paddr);