| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <4149647.zqpmlIlQDP@avalon>
Date: Tue, 14 May 2013 17:34:15 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Lad Prabhakar <prabhakar.csengg@...il.com>
Cc: LMML <linux-media@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
Hans Verkuil <hans.verkuil@...co.com>,
Mauro Carvalho Chehab <mchehab@...hat.com>,
Guennadi Liakhovetski <g.liakhovetski@....de>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Sakari Ailus <sakari.ailus@....fi>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH 5/5] media: i2c: tvp7002: add OF support
Hi Prabhakar,
Thank you for the patch.
On Tuesday 14 May 2013 16:15:34 Lad Prabhakar wrote:
> From: Lad, Prabhakar <prabhakar.csengg@...il.com>
>
> add OF support for the tvp7002 driver.
>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
> Cc: Hans Verkuil <hans.verkuil@...co.com>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
> Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
> Cc: Sakari Ailus <sakari.ailus@....fi>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Cc: Rob Herring <rob.herring@...xeda.com>
> Cc: Rob Landley <rob@...dley.net>
> Cc: devicetree-discuss@...ts.ozlabs.org
> Cc: linux-doc@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: davinci-linux-open-source@...ux.davincidsp.com
> ---
> .../devicetree/bindings/media/i2c/tvp7002.txt | 42 +++++++++++++
> drivers/media/i2c/tvp7002.c | 64 +++++++++++++++--
> 2 files changed, 99 insertions(+), 7 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/tvp7002.txt
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/tvp7002.txt
> b/Documentation/devicetree/bindings/media/i2c/tvp7002.txt new file mode
> 100644
> index 0000000..1ebd8b1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/tvp7002.txt
> @@ -0,0 +1,42 @@
> +* Texas Instruments TV7002 video decoder
> +
> +The TVP7002 device supports digitizing of video and graphics signal in RGB
> and
> +YPbPr color space.
> +
> +Required Properties :
> +- compatible : Must be "ti,tvp7002"
> +
> +- hsync-active: HSYNC Polarity configuration for endpoint.
> +
> +- vsync-active: VSYNC Polarity configuration for endpoint.
> +
> +- pclk-sample: Clock polarity of the endpoint.
> +
> +- ti,tvp7002-fid-polarity: Active-high Field ID polarity of the endpoint.
> +
> +- ti,tvp7002-sog-polarity: Sync on Green output polarity of the endpoint.
Would it make sense to define field-active and sog-active properties in the
V4L2 bindings instead of having per-chip properties ?
> +For further reading of port node refer
> Documentation/devicetree/bindings/media/ +video-interfaces.txt.
> +
> +Example:
> +
> + i2c0@...2000 {
> + ...
> + ...
> + tvp7002@5c {
> + compatible = "ti,tvp7002";
> + reg = <0x5c>;
> +
> + port {
> + tvp7002_1: endpoint {
> + hsync-active = <1>;
> + vsync-active = <1>;
> + pclk-sample = <0>;
> + ti,tvp7002-fid-polarity;
> + ti,tvp7002-sog-polarity;
> + };
> + };
> + };
> + ...
> + };
> diff --git a/drivers/media/i2c/tvp7002.c b/drivers/media/i2c/tvp7002.c
> index d5113d1..942e0d8 100644
> --- a/drivers/media/i2c/tvp7002.c
> +++ b/drivers/media/i2c/tvp7002.c
> @@ -35,6 +35,7 @@
> #include <media/v4l2-chip-ident.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-device.h>
> +#include <media/v4l2-of.h>
>
> #include "tvp7002_reg.h"
>
> @@ -976,6 +977,46 @@ static const struct v4l2_subdev_ops tvp7002_ops = {
> .pad = &tvp7002_pad_ops,
> };
>
> +static struct tvp7002_config *
> +tvp7002_get_pdata(struct i2c_client *client)
> +{
> + struct v4l2_of_endpoint bus_cfg;
> + struct tvp7002_config *pdata;
> + struct device_node *endpoint;
> + unsigned int flags;
> +
> + if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
> + return client->dev.platform_data;
> +
> + endpoint = v4l2_of_get_next_endpoint(client->dev.of_node, NULL);
> + if (!endpoint)
> + return NULL;
> +
> + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
> + if (!pdata)
> + return NULL;
> +
> + v4l2_of_parse_endpoint(endpoint, &bus_cfg);
> + flags = bus_cfg.bus.parallel.flags;
> +
> + if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
> + pdata->hs_polarity = 1;
> +
> + if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
> + pdata->vs_polarity = 1;
> +
> + if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
> + pdata->clk_polarity = 1;
> +
> + pdata->fid_polarity = of_property_read_bool(endpoint,
> + "ti,tvp7002-fid-polarity");
> +
> + pdata->sog_polarity = of_property_read_bool(endpoint,
> + "ti,tvp7002-sog-polarity");
> +
> + return pdata;
> +}
> +
> /*
> * tvp7002_probe - Probe a TVP7002 device
> * @c: ptr to i2c_client struct
> @@ -987,32 +1028,32 @@ static const struct v4l2_subdev_ops tvp7002_ops = {
> */
> static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id
> *id) {
> + struct tvp7002_config *pdata = tvp7002_get_pdata(c);
> struct v4l2_subdev *sd;
> struct tvp7002 *device;
> struct v4l2_dv_timings timings;
> int polarity_a;
> int polarity_b;
> u8 revision;
> -
> int error;
>
> + if (pdata == NULL) {
> + dev_err(&c->dev, "No platform data\n");
> + return -EINVAL;
> + }
> +
> /* Check if the adapter supports the needed features */
> if (!i2c_check_functionality(c->adapter,
> I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
> return -EIO;
>
> - if (!c->dev.platform_data) {
> - v4l_err(c, "No platform data!!\n");
> - return -ENODEV;
> - }
> -
> device = devm_kzalloc(&c->dev, sizeof(struct tvp7002), GFP_KERNEL);
>
> if (!device)
> return -ENOMEM;
>
> sd = &device->sd;
> - device->pdata = c->dev.platform_data;
> + device->pdata = pdata;
> device->current_timings = tvp7002_timings;
>
> /* Tell v4l2 the device is ready */
> @@ -1119,9 +1160,18 @@ static const struct i2c_device_id tvp7002_id[] = {
> };
> MODULE_DEVICE_TABLE(i2c, tvp7002_id);
>
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id tvp7002_of_match[] = {
> + { .compatible = "ti,tvp7002", },
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, tvp7002_of_match);
> +#endif
> +
> /* I2C driver data */
> static struct i2c_driver tvp7002_driver = {
> .driver = {
> + .of_match_table = of_match_ptr(tvp7002_of_match),
> .owner = THIS_MODULE,
> .name = TVP7002_MODULE_NAME,
> },
--
Regards,
Laurent Pinchart
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists