From: Koji Matsuoka <koji.matsuoka...@renesas.com>
At the time of NV16 capture format, the user has to specify the
capture output width of the multiple of 32 for H/W specification.
At the time of using NV16 format by ioctl of VIDIOC_S_FMT,
this patch adds align check and the error handling to forbid
specification of the capture output width which is not a multiple of 32.
Signed-off-by: Koji Matsuoka <koji.matsuoka...@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0...@gmail.com>
---
v3 [Yoshihiro Kaneko]
* fixes some code-style and remove useless error flag as suggested by
Sergei Shtylyov
v2 [Yoshihiro Kaneko]
* use u32 instead of unsigned long
drivers/media/platform/soc_camera/rcar_vin.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c
b/drivers/media/platform/soc_camera/rcar_vin.c
index dd6daab..ecdbd48 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -644,7 +644,7 @@ static int rcar_vin_setup(struct rcar_vin_priv *priv)
/* output format */
switch (icd->current_fmt->host_fmt->fourcc) {
case V4L2_PIX_FMT_NV16:
- iowrite32(ALIGN(cam->width * cam->height, 0x80),
+ iowrite32(ALIGN(ALIGN(cam->width, 0x20) * cam->height, 0x80),
priv->base + VNUVAOF_REG);
dmr = VNDMR_DTMD_YCSEP;
output_is_yuv = true;
@@ -1086,6 +1086,7 @@ static int rcar_vin_set_rect(struct soc_camera_device
*icd)
unsigned char dsize = 0;
struct v4l2_rect *cam_subrect = &cam->subrect;
u32 value;
+ u32 vnis;
dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
@@ -1163,7 +1164,11 @@ static int rcar_vin_set_rect(struct soc_camera_device
*icd)
break;
}
- iowrite32(ALIGN(cam->out_width, 0x10), priv->base + VNIS_REG);
+ if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV16)
+ vnis = ALIGN(cam->out_width, 0x20);
+ else
+ vnis = ALIGN(cam->out_width, 0x10);
+ iowrite32(vnis, priv->base + VNIS_REG);
return 0;
}
@@ -1605,6 +1610,15 @@ static int rcar_vin_set_fmt(struct soc_camera_device
*icd,
dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
pixfmt, pix->width, pix->height);
+ /*
+ * At the time of NV16 capture format, the user has to specify the
+ * width of the multiple of 32 for H/W specification.
+ */
+ if ((pixfmt == V4L2_PIX_FMT_NV16) && (pix->width & 0x1F)) {
+ dev_err(icd->parent, "Specified width error in NV16 format.\n");
+ return -EINVAL;
+ }
+
switch (pix->field) {
default:
pix->field = V4L2_FIELD_NONE;
--
1.9.1
--
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