The driver doesn't set the struct v4l2_capability bus_info field so the
v4l2-compliance tool reports the following errors for VIDIOC_QUERYCAP:

Required ioctls:
                VIDIOC_QUERYCAP returned 0 (Success)
                fail: v4l2-compliance.cpp(304): string empty
                fail: v4l2-compliance.cpp(528): check_ustring(vcap.bus_info, 
sizeof(vcap.bus_info))
        test VIDIOC_QUERYCAP: FAIL

This patch fixes by setting the field in VIDIOC_QUERYCAP ioctl handler:

Required ioctls:
                VIDIOC_QUERYCAP returned 0 (Success)
        test VIDIOC_QUERYCAP: OK

Signed-off-by: Javier Martinez Canillas <jav...@osg.samsung.com>
---

 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 3 ++-
 drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c 
b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index f2d6376ce618..4a40df22fd63 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -267,7 +267,8 @@ static int vidioc_querycap(struct file *file, void *priv,
 
        strncpy(cap->driver, dev->plat_dev->name, sizeof(cap->driver) - 1);
        strncpy(cap->card, dev->plat_dev->name, sizeof(cap->card) - 1);
-       cap->bus_info[0] = 0;
+       snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+                dev_name(&dev->plat_dev->dev));
        /*
         * This is only a mem-to-mem video device. The capture and output
         * device capability flags are left only for backward compatibility
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c 
b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
index 034b5c1d35a1..dd466ea6429e 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
@@ -945,7 +945,8 @@ static int vidioc_querycap(struct file *file, void *priv,
 
        strncpy(cap->driver, dev->plat_dev->name, sizeof(cap->driver) - 1);
        strncpy(cap->card, dev->plat_dev->name, sizeof(cap->card) - 1);
-       cap->bus_info[0] = 0;
+       snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+                dev_name(&dev->plat_dev->dev));
        /*
         * This is only a mem-to-mem video device. The capture and output
         * device capability flags are left only for backward compatibility
-- 
2.5.5

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