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Subject[PATCH v1 4/5] [media] stm32-dcmi: set default format at open()
Date
Ensure that we start with default pixel format and resolution
when opening a new instance.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
drivers/media/platform/stm32/stm32-dcmi.c | 49 ++++++++++++++++++-------------
1 file changed, 28 insertions(+), 21 deletions(-)

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index 4733d1f..2be56b6 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -890,6 +890,28 @@ static int dcmi_enum_frameintervals(struct file *file, void *fh,
return 0;
}

+static int dcmi_set_default_fmt(struct stm32_dcmi *dcmi)
+{
+ struct v4l2_format f = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .fmt.pix = {
+ .width = CIF_WIDTH,
+ .height = CIF_HEIGHT,
+ .field = V4L2_FIELD_NONE,
+ .pixelformat = dcmi->sd_formats[0]->fourcc,
+ },
+ };
+ int ret;
+
+ ret = dcmi_try_fmt(dcmi, &f, NULL);
+ if (ret)
+ return ret;
+ dcmi->sd_format = dcmi->sd_formats[0];
+ dcmi->fmt = f;
+
+ return 0;
+}
+
static const struct of_device_id stm32_dcmi_of_match[] = {
{ .compatible = "st,stm32-dcmi"},
{ /* end node */ },
@@ -916,7 +938,13 @@ static int dcmi_open(struct file *file)
if (ret < 0 && ret != -ENOIOCTLCMD)
goto fh_rel;

+ ret = dcmi_set_default_fmt(dcmi);
+ if (ret)
+ goto power_off;
+
ret = dcmi_set_fmt(dcmi, &dcmi->fmt);
+
+power_off:
if (ret)
v4l2_subdev_call(sd, core, s_power, 0);
fh_rel:
@@ -991,27 +1019,6 @@ static int dcmi_release(struct file *file)
.read = vb2_fop_read,
};

-static int dcmi_set_default_fmt(struct stm32_dcmi *dcmi)
-{
- struct v4l2_format f = {
- .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
- .fmt.pix = {
- .width = CIF_WIDTH,
- .height = CIF_HEIGHT,
- .field = V4L2_FIELD_NONE,
- .pixelformat = dcmi->sd_formats[0]->fourcc,
- },
- };
- int ret;
-
- ret = dcmi_try_fmt(dcmi, &f, NULL);
- if (ret)
- return ret;
- dcmi->sd_format = dcmi->sd_formats[0];
- dcmi->fmt = f;
- return 0;
-}
-
static const struct dcmi_format dcmi_formats[] = {
{
.fourcc = V4L2_PIX_FMT_RGB565,
--
1.9.1
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