On Wed, 11 Mar 2009, Sascha Hauer wrote:
> This patch removes the phytec specific setting of the bus width
> and switches to the more generic query_bus_param/set_bus_param
> hooks
>
> Signed-off-by: Sascha Hauer <[email protected]>
> ---
> drivers/media/video/Kconfig | 7 ---
> drivers/media/video/mt9v022.c | 97
> +++++------------------------------------
> 2 files changed, 11 insertions(+), 93 deletions(-)
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index 5fc1531..071d66f 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -747,13 +747,6 @@ config SOC_CAMERA_MT9V022
> help
> This driver supports MT9V022 cameras from Micron
>
> -config MT9V022_PCA9536_SWITCH
> - bool "pca9536 datawidth switch for mt9v022"
> - depends on SOC_CAMERA_MT9V022 && GENERIC_GPIO
> - help
> - Select this if your MT9V022 camera uses a PCA9536 I2C GPIO
> - extender to switch between 8 and 10 bit datawidth modes
> -
> config SOC_CAMERA_TW9910
> tristate "tw9910 support"
> depends on SOC_CAMERA && I2C
> diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c
> index b04c8cb..26f97eb 100644
> --- a/drivers/media/video/mt9v022.c
> +++ b/drivers/media/video/mt9v022.c
> @@ -209,66 +209,6 @@ static int mt9v022_stop_capture(struct soc_camera_device
> *icd)
> return 0;
> }
>
> -static int bus_switch_request(struct mt9v022 *mt9v022, struct
> soc_camera_link *icl)
> -{
> -#ifdef CONFIG_MT9V022_PCA9536_SWITCH
> - int ret;
> - unsigned int gpio = icl->gpio;
> -
> - if (gpio_is_valid(gpio)) {
> - /* We have a data bus switch. */
> - ret = gpio_request(gpio, "mt9v022");
> - if (ret < 0) {
> - dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n",
> gpio);
> - return ret;
> - }
> -
> - ret = gpio_direction_output(gpio, 0);
> - if (ret < 0) {
> - dev_err(&mt9v022->client->dev,
> - "Cannot set GPIO %u to output\n", gpio);
> - gpio_free(gpio);
> - return ret;
> - }
> - }
> -
> - mt9v022->switch_gpio = gpio;
> -#else
> - mt9v022->switch_gpio = -EINVAL;
> -#endif
> - return 0;
> -}
> -
> -static void bus_switch_release(struct mt9v022 *mt9v022)
> -{
> -#ifdef CONFIG_MT9V022_PCA9536_SWITCH
> - if (gpio_is_valid(mt9v022->switch_gpio))
> - gpio_free(mt9v022->switch_gpio);
> -#endif
> -}
> -
> -static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit)
> -{
> -#ifdef CONFIG_MT9V022_PCA9536_SWITCH
> - if (!gpio_is_valid(mt9v022->switch_gpio))
> - return -ENODEV;
> -
> - gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit);
> - return 0;
> -#else
> - return -ENODEV;
> -#endif
> -}
> -
> -static int bus_switch_possible(struct mt9v022 *mt9v022)
> -{
> -#ifdef CONFIG_MT9V022_PCA9536_SWITCH
> - return gpio_is_valid(mt9v022->switch_gpio);
> -#else
> - return 0;
> -#endif
> -}
> -
> static int mt9v022_set_bus_param(struct soc_camera_device *icd,
> unsigned long flags)
> {
> @@ -282,19 +222,10 @@ static int mt9v022_set_bus_param(struct
> soc_camera_device *icd,
> if (!is_power_of_2(width_flag))
> return -EINVAL;
>
> - if ((mt9v022->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) ||
> - (mt9v022->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) ||
> - (mt9v022->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) {
> - /* Well, we actually only can do 10 or 8 bits... */
> - if (width_flag == SOCAM_DATAWIDTH_9)
> - return -EINVAL;
> -
> - ret = bus_switch_act(mt9v022,
> - width_flag == SOCAM_DATAWIDTH_8);
> - if (ret < 0)
> + if (icl->set_bus_param) {
> + ret = icl->set_bus_param(&mt9v022->client->dev, width_flag);
> + if (ret)
> return ret;
> -
> - mt9v022->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10;
> }
>
> flags = soc_camera_apply_sensor_flags(icl, flags);
> @@ -328,10 +259,14 @@ static int mt9v022_set_bus_param(struct
> soc_camera_device *icd,
> static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
> {
> struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
> - unsigned int width_flag = SOCAM_DATAWIDTH_10;
> + struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
> + unsigned int width_flag;
>
> - if (bus_switch_possible(mt9v022))
> - width_flag |= SOCAM_DATAWIDTH_8;
> + if (icl->query_bus_param)
> + width_flag = icl->query_bus_param(&mt9v022->client->dev) &
> + SOCAM_DATAWIDTH_MASK;
> + else
> + width_flag = SOCAM_DATAWIDTH_10;
>
> return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
> SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
> @@ -729,6 +664,7 @@ static int mt9v022_video_probe(struct soc_camera_device
> *icd)
> /* Set monochrome or colour sensor type */
> if (sensor_type && (!strcmp("colour", sensor_type) ||
> !strcmp("color", sensor_type))) {
> + if (1) {
Already pointed out by Hans.
> ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
> mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
> icd->formats = mt9v022_colour_formats;
> @@ -812,14 +748,6 @@ static int mt9v022_probe(struct i2c_client *client,
> icd->height_max = 480;
> icd->y_skip_top = 1;
> icd->iface = icl->bus_id;
> - /* Default datawidth - this is the only width this camera (normally)
> - * supports. It is only with extra logic that it can support
> - * other widths. Therefore it seems to be a sensible default. */
> - mt9v022->datawidth = 10;
> -
> - ret = bus_switch_request(mt9v022, icl);
> - if (ret)
> - goto eswinit;
>
> ret = soc_camera_device_register(icd);
> if (ret)
As you remove ->gpio from struct soc_camera_link, you'll have to change
if (gpio_is_valid(icl->gpio))
tests here too. Maybe make the format-selection in mt9v022 similar to
mt9m001, even though I am not quite sure, that hard-coding the knowledge
of the internal layout of the two format arrays (mt9m001_colour_formats
and mt9m001_monochrome_formats) was a very good idea, but, well, I had
already some assumptions about that in the code. But at least, maybe it is
better to keep mt9m001 and mt9v022 look similar.
> @@ -828,8 +756,6 @@ static int mt9v022_probe(struct i2c_client *client,
> return 0;
>
> eisdr:
> - bus_switch_release(mt9v022);
> -eswinit:
> kfree(mt9v022);
> return ret;
> }
> @@ -839,7 +765,6 @@ static int mt9v022_remove(struct i2c_client *client)
> struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
>
> soc_camera_device_unregister(&mt9v022->icd);
> - bus_switch_release(mt9v022);
> kfree(mt9v022);
>
> return 0;
> --
> 1.5.6.5
>
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
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