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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-01-02 20:06:08 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-05-25 11:12:02 -0300
commitc60e153d3407b5a94b72ebfcf274fae98979eed9 (patch)
treec1ae565a9d319dad78bf2260a01c02ee91365311
parentd33186d0be1823d2ae397d620e623e5592288e18 (diff)
[media] omap3isp: ccdc: Use the DMA API for FPC
Replace the OMAP-specific IOMMU API usage by the DMA API for FPC. The table is now allocated using dma_alloc_coherent() and the related sg table is retrieved using dma_get_sgtable() for sync operations. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sakari Ailus <sakari.ailus@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--drivers/media/platform/omap3isp/ispccdc.c51
-rw-r--r--drivers/media/platform/omap3isp/ispccdc.h8
2 files changed, 35 insertions, 24 deletions
diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c
index a907b20c2e8d..004a4f52d9d7 100644
--- a/drivers/media/platform/omap3isp/ispccdc.c
+++ b/drivers/media/platform/omap3isp/ispccdc.c
@@ -30,7 +30,6 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
-#include <linux/omap-iommu.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <media/v4l2-event.h>
@@ -578,7 +577,7 @@ static void ccdc_configure_fpc(struct isp_ccdc_device *ccdc)
if (!ccdc->fpc_en)
return;
- isp_reg_writel(isp, ccdc->fpc.fpcaddr, OMAP3_ISP_IOMEM_CCDC,
+ isp_reg_writel(isp, ccdc->fpc.dma, OMAP3_ISP_IOMEM_CCDC,
ISPCCDC_FPC_ADDR);
/* The FPNUM field must be set before enabling FPC. */
isp_reg_writel(isp, (ccdc->fpc.fpnum << ISPCCDC_FPC_FPNUM_SHIFT),
@@ -718,8 +717,9 @@ static int ccdc_config(struct isp_ccdc_device *ccdc,
ccdc->shadow_update = 0;
if (OMAP3ISP_CCDC_FPC & ccdc_struct->update) {
- u32 table_old = 0;
- u32 table_new;
+ struct omap3isp_ccdc_fpc fpc;
+ struct ispccdc_fpc fpc_old = { .addr = NULL, };
+ struct ispccdc_fpc fpc_new;
u32 size;
if (ccdc->state != ISP_PIPELINE_STREAM_STOPPED)
@@ -728,35 +728,39 @@ static int ccdc_config(struct isp_ccdc_device *ccdc,
ccdc->fpc_en = !!(OMAP3ISP_CCDC_FPC & ccdc_struct->flag);
if (ccdc->fpc_en) {
- if (copy_from_user(&ccdc->fpc, ccdc_struct->fpc,
- sizeof(ccdc->fpc)))
+ if (copy_from_user(&fpc, ccdc_struct->fpc, sizeof(fpc)))
return -EFAULT;
+ size = fpc.fpnum * 4;
+
/*
- * table_new must be 64-bytes aligned, but it's
- * already done by omap_iommu_vmalloc().
+ * The table address must be 64-bytes aligned, which is
+ * guaranteed by dma_alloc_coherent().
*/
- size = ccdc->fpc.fpnum * 4;
- table_new = omap_iommu_vmalloc(isp->domain, isp->dev,
- 0, size, IOMMU_FLAG);
- if (IS_ERR_VALUE(table_new))
+ fpc_new.fpnum = fpc.fpnum;
+ fpc_new.addr = dma_alloc_coherent(isp->dev, size,
+ &fpc_new.dma,
+ GFP_KERNEL);
+ if (fpc_new.addr == NULL)
return -ENOMEM;
- if (copy_from_user(omap_da_to_va(isp->dev, table_new),
- (__force void __user *)
- ccdc->fpc.fpcaddr, size)) {
- omap_iommu_vfree(isp->domain, isp->dev,
- table_new);
+ if (copy_from_user(fpc_new.addr,
+ (__force void __user *)fpc.fpcaddr,
+ size)) {
+ dma_free_coherent(isp->dev, size, fpc_new.addr,
+ fpc_new.dma);
return -EFAULT;
}
- table_old = ccdc->fpc.fpcaddr;
- ccdc->fpc.fpcaddr = table_new;
+ fpc_old = ccdc->fpc;
+ ccdc->fpc = fpc_new;
}
ccdc_configure_fpc(ccdc);
- if (table_old != 0)
- omap_iommu_vfree(isp->domain, isp->dev, table_old);
+
+ if (fpc_old.addr != NULL)
+ dma_free_coherent(isp->dev, fpc_old.fpnum * 4,
+ fpc_old.addr, fpc_old.dma);
}
return ccdc_lsc_config(ccdc, ccdc_struct);
@@ -2574,8 +2578,9 @@ void omap3isp_ccdc_cleanup(struct isp_device *isp)
cancel_work_sync(&ccdc->lsc.table_work);
ccdc_lsc_free_queue(ccdc, &ccdc->lsc.free_queue);
- if (ccdc->fpc.fpcaddr != 0)
- omap_iommu_vfree(isp->domain, isp->dev, ccdc->fpc.fpcaddr);
+ if (ccdc->fpc.addr != NULL)
+ dma_free_coherent(isp->dev, ccdc->fpc.fpnum * 4, ccdc->fpc.addr,
+ ccdc->fpc.dma);
mutex_destroy(&ccdc->ioctl_lock);
}
diff --git a/drivers/media/platform/omap3isp/ispccdc.h b/drivers/media/platform/omap3isp/ispccdc.h
index 20db3a060d8f..f65061602c71 100644
--- a/drivers/media/platform/omap3isp/ispccdc.h
+++ b/drivers/media/platform/omap3isp/ispccdc.h
@@ -46,6 +46,12 @@ enum ccdc_input_entity {
#define OMAP3ISP_CCDC_NEVENTS 16
+struct ispccdc_fpc {
+ void *addr;
+ dma_addr_t dma;
+ unsigned int fpnum;
+};
+
enum ispccdc_lsc_state {
LSC_STATE_STOPPED = 0,
LSC_STATE_STOPPING = 1,
@@ -140,7 +146,7 @@ struct isp_ccdc_device {
fpc_en:1;
struct omap3isp_ccdc_blcomp blcomp;
struct omap3isp_ccdc_bclamp clamp;
- struct omap3isp_ccdc_fpc fpc;
+ struct ispccdc_fpc fpc;
struct ispccdc_lsc lsc;
unsigned int update;
unsigned int shadow_update;

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