From: Smitha T Murthy <smitha.t@xxxxxxxxxxx>
It has been observed on ARM64 based Exynos SoC, if IOMMU is not enabled
and we try to use reserved memory for MFC, reqbufs fails with below
mentioned error
---------------------------------------------------------------------------
V4L2 Codec decoding example application
Kamil Debski <k.debski@xxxxxxxxxxx>
Copyright 2012 Samsung Electronics Co., Ltd.
Opening MFC.
(mfc.c:mfc_open:58): MFC Info (/dev/video0): driver="s5p-mfc" \
bus_info="platform:12c30000.mfc0" card="s5p-mfc-dec" fd=0x4[
42.339165] Remapping memory failed, error: -6
MFC Open Success.
(main.c:main:711): Successfully opened all necessary files and devices
(mfc.c:mfc_dec_setup_output:103): Setup MFC decoding OUTPUT buffer \
size=4194304 (requested=4194304)
(mfc.c:mfc_dec_setup_output:120): Number of MFC OUTPUT buffers is 2 \
(requested 2)
[App] Out buf phy : 0x00000000, virt : 0xffffffff
Output Length is = 0x300000
Error (mfc.c:mfc_dec_setup_output:145): Failed to MMAP MFC OUTPUT buffer
-------------------------------------------------------------------------
This is because the device requesting for memory is mfc0.left not the parent mfc0.
Hence setting of alloc_devs need to be done only if IOMMU is enabled
and in that case both the left and right device is treated as mfc0 only.
Signed-off-by: Smitha T Murthy <smitha.t@xxxxxxxxxxx>
[pankaj.dubey: debugging issue and formatting commit message]
Signed-off-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>
---
drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 17 ++++++++++-------
drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 18 +++++++++++-------
2 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 52081dd..9cfca5d 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -30,6 +30,7 @@
#include "s5p_mfc_intr.h"
#include "s5p_mfc_opr.h"
#include "s5p_mfc_pm.h"
+#include "s5p_mfc_iommu.h"
static struct s5p_mfc_fmt formats[] = {
{
@@ -930,16 +931,18 @@ static int s5p_mfc_queue_setup(struct vb2_queue *vq,
vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
psize[0] = ctx->luma_size;
psize[1] = ctx->chroma_size;
-
- if (IS_MFCV6_PLUS(dev))
- alloc_devs[0] = ctx->dev->mem_dev_l;
- else
- alloc_devs[0] = ctx->dev->mem_dev_r;
- alloc_devs[1] = ctx->dev->mem_dev_l;
+ if (exynos_is_iommu_available(&dev->plat_dev->dev)) {
+ if (IS_MFCV6_PLUS(dev))
+ alloc_devs[0] = ctx->dev->mem_dev_l;
+ else
+ alloc_devs[0] = ctx->dev->mem_dev_r;
+ alloc_devs[1] = ctx->dev->mem_dev_l;
+ }
} else if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE &&
ctx->state == MFCINST_INIT) {
psize[0] = ctx->dec_src_buf_size;
- alloc_devs[0] = ctx->dev->mem_dev_l;
+ if (exynos_is_iommu_available(&dev->plat_dev->dev))
+ alloc_devs[0] = ctx->dev->mem_dev_l;
} else {
mfc_err("This video node is dedicated to decoding. Decoding not initialized\n");
return -EINVAL;
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
index fcc2e05..eb8f06d 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
@@ -30,6 +30,7 @@
#include "s5p_mfc_enc.h"
#include "s5p_mfc_intr.h"
#include "s5p_mfc_opr.h"
+#include "s5p_mfc_iommu.h"
#define DEF_SRC_FMT_ENC V4L2_PIX_FMT_NV12M
#define DEF_DST_FMT_ENC V4L2_PIX_FMT_H264
@@ -1832,7 +1833,8 @@ static int s5p_mfc_queue_setup(struct vb2_queue *vq,
if (*buf_count > MFC_MAX_BUFFERS)
*buf_count = MFC_MAX_BUFFERS;
psize[0] = ctx->enc_dst_buf_size;
- alloc_devs[0] = ctx->dev->mem_dev_l;
+ if (exynos_is_iommu_available(&dev->plat_dev->dev))
+ alloc_devs[0] = ctx->dev->mem_dev_l;
} else if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
if (ctx->src_fmt)
*plane_count = ctx->src_fmt->num_planes;
@@ -1847,12 +1849,14 @@ static int s5p_mfc_queue_setup(struct vb2_queue *vq,
psize[0] = ctx->luma_size;
psize[1] = ctx->chroma_size;
- if (IS_MFCV6_PLUS(dev)) {
- alloc_devs[0] = ctx->dev->mem_dev_l;
- alloc_devs[1] = ctx->dev->mem_dev_l;
- } else {
- alloc_devs[0] = ctx->dev->mem_dev_r;
- alloc_devs[1] = ctx->dev->mem_dev_r;
+ if (exynos_is_iommu_available(&dev->plat_dev->dev)) {
+ if (IS_MFCV6_PLUS(dev)) {
+ alloc_devs[0] = ctx->dev->mem_dev_l;
+ alloc_devs[1] = ctx->dev->mem_dev_l;
+ } else {
+ alloc_devs[0] = ctx->dev->mem_dev_r;
+ alloc_devs[1] = ctx->dev->mem_dev_r;
+ }
}
} else {
mfc_err("invalid queue type: %d\n", vq->type);
--
2.7.4
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