[PATCH v2 0/3] media: ov2640: fix two problems

[PATCH v2 0/3] media: ov2640: fix two problems

[Akinobu Mita]

This patch series contains two bugfixes and a preparatory change for
ov2640 driver.

* v2
- fix build error when CONFIG_VIDEO_V4L2_SUBDEV_API is not defined,
  reported by kbuild test robot.

Akinobu Mita (3):
  media: ov2640: set default window and format code at probe time
  media: ov2640: make VIDIOC_SUBDEV_G_FMT ioctl work with
    V4L2_SUBDEV_FORMAT_TRY
  media: ov2640: set all mbus format field when G_FMT and S_FMT ioctls

 drivers/media/i2c/ov2640.c | 45 +++++++++++++++++++++++++++++++++++++++------
 1 file changed, 39 insertions(+), 6 deletions(-)

Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
-- 
2.7.4

[PATCH v2 1/3] media: ov2640: set default window and format code at probe time

[Akinobu Mita]

Set default window and format code at probe time instead of always checking
if they have not been set yet when VIDIOC_SUBDEV_G_FMT ioctl is called.

This change simplifies the next patch (make VIDIOC_SUBDEV_G_FMT ioctl work
with V4L2_SUBDEV_FORMAT_TRY).

Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
 drivers/media/i2c/ov2640.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/media/i2c/ov2640.c b/drivers/media/i2c/ov2640.c
index d8e91bc..a07e6f2 100644
--- a/drivers/media/i2c/ov2640.c
+++ b/drivers/media/i2c/ov2640.c
@@ -842,9 +842,6 @@ static int ov2640_set_params(struct i2c_client *client,
 	u8 val;
 	int ret;
 
-	if (!win)
-		return -EINVAL;
-
 	switch (code) {
 	case MEDIA_BUS_FMT_RGB565_2X8_BE:
 		dev_dbg(&client->dev, "%s: Selected cfmt RGB565 BE", __func__);
@@ -929,10 +926,6 @@ static int ov2640_get_fmt(struct v4l2_subdev *sd,
 	if (format->pad)
 		return -EINVAL;
 
-	if (!priv->win) {
-		priv->win = ov2640_select_win(SVGA_WIDTH, SVGA_HEIGHT);
-		priv->cfmt_code = MEDIA_BUS_FMT_UYVY8_2X8;
-	}
 
 	mf->width	= priv->win->width;
 	mf->height	= priv->win->height;
@@ -1193,6 +1186,9 @@ static int ov2640_probe(struct i2c_client *client,
 	if (ret)
 		goto err_clk;
 
+	priv->win = ov2640_select_win(SVGA_WIDTH, SVGA_HEIGHT);
+	priv->cfmt_code = MEDIA_BUS_FMT_UYVY8_2X8;
+
 	v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops);
 	priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
 			      V4L2_SUBDEV_FL_HAS_EVENTS;
-- 
2.7.4

[PATCH v2 2/3] media: ov2640: make VIDIOC_SUBDEV_G_FMT ioctl work with V4L2_SUBDEV_FORMAT_TRY

[Akinobu Mita]

The VIDIOC_SUBDEV_G_FMT ioctl for this driver doesn't recognize
V4L2_SUBDEV_FORMAT_TRY and always works as if V4L2_SUBDEV_FORMAT_ACTIVE
is specified.

Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
* v2
- fix build error when CONFIG_VIDEO_V4L2_SUBDEV_API is not defined,
  reported by kbuild test robot.

 drivers/media/i2c/ov2640.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/media/i2c/ov2640.c b/drivers/media/i2c/ov2640.c
index a07e6f2..84b1b15 100644
--- a/drivers/media/i2c/ov2640.c
+++ b/drivers/media/i2c/ov2640.c
@@ -926,6 +926,15 @@ static int ov2640_get_fmt(struct v4l2_subdev *sd,
 	if (format->pad)
 		return -EINVAL;
 
+	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+		mf = v4l2_subdev_get_try_format(sd, cfg, 0);
+		format->format = *mf;
+		return 0;
+#else
+		return -ENOTTY;
+#endif
+	}
 
 	mf->width	= priv->win->width;
 	mf->height	= priv->win->height;
@@ -992,6 +1001,27 @@ static int ov2640_set_fmt(struct v4l2_subdev *sd,
 	return ret;
 }
 
+static int ov2640_init_cfg(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_pad_config *cfg)
+{
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	struct ov2640_priv *priv = to_ov2640(client);
+	struct v4l2_mbus_framefmt *try_fmt =
+		v4l2_subdev_get_try_format(sd, cfg, 0);
+
+	try_fmt->width = priv->win->width;
+	try_fmt->height = priv->win->height;
+	try_fmt->code = priv->cfmt_code;
+	try_fmt->colorspace = V4L2_COLORSPACE_SRGB;
+	try_fmt->field = V4L2_FIELD_NONE;
+	try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+	try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
+	try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+#endif
+	return 0;
+}
+
 static int ov2640_enum_mbus_code(struct v4l2_subdev *sd,
 		struct v4l2_subdev_pad_config *cfg,
 		struct v4l2_subdev_mbus_code_enum *code)
@@ -1101,6 +1131,7 @@ static const struct v4l2_subdev_core_ops ov2640_subdev_core_ops = {
 };
 
 static const struct v4l2_subdev_pad_ops ov2640_subdev_pad_ops = {
+	.init_cfg	= ov2640_init_cfg,
 	.enum_mbus_code = ov2640_enum_mbus_code,
 	.get_selection	= ov2640_get_selection,
 	.get_fmt	= ov2640_get_fmt,
-- 
2.7.4

[PATCH v2 3/3] media: ov2640: set all mbus format field when G_FMT and S_FMT ioctls

[Akinobu Mita]

This driver doesn't set all members of mbus format field when the
VIDIOC_SUBDEV_{S,G}_FMT ioctls are called.

This is detected by v4l2-compliance.

Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
 drivers/media/i2c/ov2640.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/i2c/ov2640.c b/drivers/media/i2c/ov2640.c
index 84b1b15..09325da 100644
--- a/drivers/media/i2c/ov2640.c
+++ b/drivers/media/i2c/ov2640.c
@@ -941,6 +941,9 @@ static int ov2640_get_fmt(struct v4l2_subdev *sd,
 	mf->code	= priv->cfmt_code;
 	mf->colorspace	= V4L2_COLORSPACE_SRGB;
 	mf->field	= V4L2_FIELD_NONE;
+	mf->ycbcr_enc	= V4L2_YCBCR_ENC_DEFAULT;
+	mf->quantization = V4L2_QUANTIZATION_DEFAULT;
+	mf->xfer_func	= V4L2_XFER_FUNC_DEFAULT;
 
 	return 0;
 }
@@ -967,6 +970,9 @@ static int ov2640_set_fmt(struct v4l2_subdev *sd,
 
 	mf->field	= V4L2_FIELD_NONE;
 	mf->colorspace	= V4L2_COLORSPACE_SRGB;
+	mf->ycbcr_enc	= V4L2_YCBCR_ENC_DEFAULT;
+	mf->quantization = V4L2_QUANTIZATION_DEFAULT;
+	mf->xfer_func	= V4L2_XFER_FUNC_DEFAULT;
 
 	switch (mf->code) {
 	case MEDIA_BUS_FMT_RGB565_2X8_BE:
-- 
2.7.4