[PATCH v1 10/10] media: i2c: tw9910: Remove soc_camera dependencies

Jacopo Mondi
2017-11-15T11:16:47Z

Remove soc_camera framework dependencies from tw9910 sensor driver.
- Handle clock directly
- Register async subdevice
- Add platform specific enable/disable functions
- Adjust build system

This commit does not remove the original soc_camera based driver.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/media/i2c/Kconfig | 9 ++++++
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/tw9910.c | 80 ++++++++++++++++++++++++++++++++++------------
include/media/i2c/tw9910.h | 6 ++++
4 files changed, 75 insertions(+), 21 deletions(-)

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index ff251ce..bbd77ee 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -415,6 +415,15 @@ config VIDEO_TW9906
To compile this driver as a module, choose M here: the
module will be called tw9906.

+config VIDEO_TW9910
+ tristate "Techwell TW9910 video decoder"
+ depends on VIDEO_V4L2 && I2C
+ ---help---
+ Support for Techwell TW9910 NTSC/PAL/SECAM video decoder.
+
+ To compile this driver as a module, choose M here: the
+ module will be called tw9910.
+
config VIDEO_VPX3220
tristate "vpx3220a, vpx3216b & vpx3214c video decoders"
depends on VIDEO_V4L2 && I2C
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index b2459a1..835784a 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_VIDEO_TVP7002) += tvp7002.o
obj-$(CONFIG_VIDEO_TW2804) += tw2804.o
obj-$(CONFIG_VIDEO_TW9903) += tw9903.o
obj-$(CONFIG_VIDEO_TW9906) += tw9906.o
+obj-$(CONFIG_VIDEO_TW9910) += tw9910.o
obj-$(CONFIG_VIDEO_CS3308) += cs3308.o
obj-$(CONFIG_VIDEO_CS5345) += cs5345.o
obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
diff --git a/drivers/media/i2c/tw9910.c b/drivers/media/i2c/tw9910.c
index bdb5e0a..f422da2 100644
--- a/drivers/media/i2c/tw9910.c
+++ b/drivers/media/i2c/tw9910.c
@@ -16,6 +16,7 @@
* published by the Free Software Foundation.
*/

+#include <linux/clk.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
@@ -25,9 +26,7 @@
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>

-#include <media/soc_camera.h>
#include <media/i2c/tw9910.h>
-#include <media/v4l2-clk.h>
#include <media/v4l2-subdev.h>

#define GET_ID(val) ((val & 0xF8) >> 3)
@@ -228,7 +227,7 @@ struct tw9910_scale_ctrl {

struct tw9910_priv {
struct v4l2_subdev subdev;
- struct v4l2_clk *clk;
+ struct clk *clk;
struct tw9910_video_info *info;
const struct tw9910_scale_ctrl *scale;
v4l2_std_id norm;
@@ -582,13 +581,40 @@ static int tw9910_s_register(struct v4l2_subdev *sd,
}
#endif

+static int tw9910_power_on(struct tw9910_priv *priv)
+{
+ int ret;
+
+ if (priv->info->platform_enable) {
+ ret = priv->info->platform_enable();
+ if (ret)
+ return ret;
+ }
+
+ if (priv->clk)
+ return clk_enable(priv->clk);
+
+ return 0;
+}
+
+static int tw9910_power_off(struct tw9910_priv *priv)
+{
+ if (priv->info->platform_enable)
+ priv->info->platform_disable();
+
+ if (priv->clk)
+ clk_disable(priv->clk);
+
+ return 0;
+}
+
static int tw9910_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
struct tw9910_priv *priv = to_tw9910(client);

- return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
+ return on ? tw9910_power_on(priv) :
+ tw9910_power_off(priv);
}

static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
@@ -614,7 +640,7 @@ static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
* set bus width
*/
val = 0x00;
- if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
+ if (priv->info->buswidth == TW9910_DATAWIDTH_16)
val = LEN;

ret = tw9910_mask_set(client, OPFORM, LEN, val);
@@ -799,8 +825,8 @@ static int tw9910_video_probe(struct i2c_client *client)
/*
* tw9910 only use 8 or 16 bit bus width
*/
- if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
- SOCAM_DATAWIDTH_8 != priv->info->buswidth) {
+ if (priv->info->buswidth != TW9910_DATAWIDTH_16 &&
+ priv->info->buswidth != TW9910_DATAWIDTH_8) {
dev_err(&client->dev, "bus width error\n");
return -ENODEV;
}
@@ -859,15 +885,11 @@ static int tw9910_enum_mbus_code(struct v4l2_subdev *sd,
static int tw9910_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
-
cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
V4L2_MBUS_DATA_ACTIVE_HIGH;
cfg->type = V4L2_MBUS_PARALLEL;
- cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);

return 0;
}
@@ -876,9 +898,8 @@ static int tw9910_s_mbus_config(struct v4l2_subdev *sd,
const struct v4l2_mbus_config *cfg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
u8 val = VSSL_VVALID | HSSL_DVALID;
- unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
+ unsigned long flags = cfg->flags;

/*
* set OUTCTR1
@@ -935,15 +956,14 @@ static int tw9910_probe(struct i2c_client *client,
struct tw9910_video_info *info;
struct i2c_adapter *adapter =
to_i2c_adapter(client->dev.parent);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
int ret;

- if (!ssdd || !ssdd->drv_priv) {
+ if (!client->dev.platform_data) {
dev_err(&client->dev, "TW9910: missing platform data!\n");
return -EINVAL;
}

- info = ssdd->drv_priv;
+ info = client->dev.platform_data;

if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev,
@@ -959,13 +979,27 @@ static int tw9910_probe(struct i2c_client *client,

v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);

- priv->clk = v4l2_clk_get(&client->dev, "mclk");
- if (IS_ERR(priv->clk))
+ priv->clk = clk_get(&client->dev, "mclk");
+ if (PTR_ERR(priv->clk) == -ENOENT) {
+ priv->clk = NULL;
+ } else if (IS_ERR(priv->clk)) {
+ dev_err(&client->dev, "Unable to get mclk clock\n");
return PTR_ERR(priv->clk);
+ }

ret = tw9910_video_probe(client);
if (ret < 0)
- v4l2_clk_put(priv->clk);
+ goto error_put_clk;
+
+ ret = v4l2_async_register_subdev(&priv->subdev);
+ if (ret)
+ goto error_put_clk;
+
+ return ret;
+
+error_put_clk:
+ if (priv->clk)
+ clk_put(priv->clk);

return ret;
}
@@ -973,7 +1007,11 @@ static int tw9910_probe(struct i2c_client *client,
static int tw9910_remove(struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
- v4l2_clk_put(priv->clk);
+
+ if (priv->clk)
+ clk_put(priv->clk);
+ v4l2_device_unregister_subdev(&priv->subdev);
+
return 0;
}

diff --git a/include/media/i2c/tw9910.h b/include/media/i2c/tw9910.h
index 90bcf1f..b80e45c 100644
--- a/include/media/i2c/tw9910.h
+++ b/include/media/i2c/tw9910.h
@@ -18,6 +18,9 @@

#include <media/soc_camera.h>

+#define TW9910_DATAWIDTH_8 BIT(0)
+#define TW9910_DATAWIDTH_16 BIT(1)
+
enum tw9910_mpout_pin {
TW9910_MPO_VLOSS,
TW9910_MPO_HLOCK,
@@ -32,6 +35,9 @@ enum tw9910_mpout_pin {
struct tw9910_video_info {
unsigned long buswidth;
enum tw9910_mpout_pin mpout;
+
+ int (*platform_enable)(void);
+ void (*platform_disable)(void);
};

--
2.7.4