[PATCH v2 10/10] [media] tvp5150: Configure data interface via DT

Javier Martinez Canillas
2016-01-07T12:47:59Z

The video decoder supports either 8-bit 4:2:2 YUV with discrete syncs
or 8-bit ITU-R BT.656 with embedded syncs output format but currently
BT.656 it's always reported. Allow to configure the format to use via
either platform data or a device tree definition.

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

---

Changes in v2:
- Embed mbus_type into struct tvp5150. Suggested by Laurent Pinchart.
- Remove platform data support. Suggested by Laurent Pinchart.
- Check if the hsync, vsync and field even active properties are correct.
Suggested by Laurent Pinchart.

drivers/media/i2c/tvp5150.c | 66 ++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 63 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 48df7615eb64..813c7181dca9 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -15,6 +15,7 @@
#include <media/v4l2-device.h>
#include <media/i2c/tvp5150.h>
#include <media/v4l2-ctrls.h>
+#include <media/v4l2-of.h>

#include "tvp5150_reg.h"

@@ -44,6 +45,8 @@ struct tvp5150 {
u32 input;
u32 output;
int enable;
+
+ enum v4l2_mbus_type mbus_type;
};

static inline struct tvp5150 *to_tvp5150(struct v4l2_subdev *sd)
@@ -774,6 +777,10 @@ static int tvp5150_reset(struct v4l2_subdev *sd, u32 val)
v4l2_ctrl_handler_setup(&decoder->hdl);

tvp5150_set_std(sd, decoder->norm);
+
+ if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
+ tvp5150_write(sd, TVP5150_DATA_RATE_SEL, 0x40);
+
return 0;
};

@@ -940,7 +947,9 @@ static int tvp5150_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
static int tvp5150_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
- cfg->type = V4L2_MBUS_BT656;
+ struct tvp5150 *decoder = to_tvp5150(sd);
+
+ cfg->type = decoder->mbus_type;
cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING
| V4L2_MBUS_FIELD_EVEN_LOW | V4L2_MBUS_DATA_ACTIVE_HIGH;

@@ -986,13 +995,20 @@ static int tvp5150_enum_frame_size(struct v4l2_subdev *sd,

static int tvp5150_s_stream(struct v4l2_subdev *sd, int enable)
{
+ struct tvp5150 *decoder = to_tvp5150(sd);
+ /* Output format: 8-bit ITU-R BT.656 with embedded syncs */
+ int val = 0x09;
+
+ /* Output format: 8-bit 4:2:2 YUV with discrete sync */
+ if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
+ val = 0x0d;
+
/* Initializes TVP5150 to its default values */
/* # set PCLK (27MHz) */
tvp5150_write(sd, TVP5150_CONF_SHARED_PIN, 0x00);

- /* Output format: 8-bit ITU-R BT.656 with embedded syncs */
if (enable)
- tvp5150_write(sd, TVP5150_MISC_CTL, 0x09);
+ tvp5150_write(sd, TVP5150_MISC_CTL, val);
else
tvp5150_write(sd, TVP5150_MISC_CTL, 0x00);

@@ -1228,11 +1244,42 @@ static int tvp5150_init(struct i2c_client *c)
return 0;
}

+static int tvp5150_parse_dt(struct tvp5150 *decoder, struct device_node *np)
+{
+ struct v4l2_of_endpoint bus_cfg;
+ struct device_node *ep;
+ unsigned int flags;
+ int ret = 0;
+
+ ep = of_graph_get_next_endpoint(np, NULL);
+ if (!ep)
+ return -EINVAL;
+
+ ret = v4l2_of_parse_endpoint(ep, &bus_cfg);
+ if (ret)
+ goto err;
+
+ flags = bus_cfg.bus.parallel.flags;
+
+ if (bus_cfg.bus_type == V4L2_MBUS_PARALLEL &&
+ !(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH &&
+ flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH &&
+ flags & V4L2_MBUS_FIELD_EVEN_LOW))
+ return -EINVAL;
+
+ decoder->mbus_type = bus_cfg.bus_type;
+
+err:
+ of_node_put(ep);
+ return ret;
+}
+
static int tvp5150_probe(struct i2c_client *c,
const struct i2c_device_id *id)
{
struct tvp5150 *core;
struct v4l2_subdev *sd;
+ struct device_node *np = c->dev.of_node;
int res;

/* Check if the adapter supports the needed features */
@@ -1247,7 +1294,20 @@ static int tvp5150_probe(struct i2c_client *c,
core = devm_kzalloc(&c->dev, sizeof(*core), GFP_KERNEL);
if (!core)
return -ENOMEM;
+
sd = &core->sd;
+
+ if (IS_ENABLED(CONFIG_OF) && np) {
+ res = tvp5150_parse_dt(core, np);
+ if (res) {
+ v4l2_err(sd, "DT parsing error: %d\n", res);
+ return res;
+ }
+ } else {
+ /* Default to BT.656 embedded sync */
+ core->mbus_type = V4L2_MBUS_BT656;
+ }
+
v4l2_i2c_subdev_init(sd, c, &tvp5150_ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

--
2.4.3