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Date: Wed, 13 Dec 2017 13:13:42 +0100
From: Hans Verkuil <hverkuil@...all.nl>
To: Jacopo Mondi <jacopo+renesas@...ndi.org>,
laurent.pinchart@...asonboard.com, magnus.damm@...il.com,
geert@...der.be, mchehab@...nel.org
Cc: linux-renesas-soc@...r.kernel.org, linux-media@...r.kernel.org,
linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 10/10] media: i2c: tw9910: Remove soc_camera
dependencies
On 15/11/17 11:56, Jacopo Mondi wrote:
> 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@...ndi.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
As mentioned elsewhere, drop support for g/s_mbus_config, use the DT instead.
> @@ -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;
> }
>
Also update MODULE_DESCRIPTION.
> 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
>
Regards,
Hans
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