Re: [PATCH v3 1/2] drm: bridge: it66121: Extend match support for OF tables

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Biju,

Thank you for the patch.

On Fri, Aug 18, 2023 at 08:18:16PM +0100, Biju Das wrote:
> The driver has OF match table, still it uses ID lookup table for
> retrieving match data. Currently the driver is working on the
> assumption that a I2C device registered via OF will always match a
> legacy I2C device ID. The correct approach is to have an OF device ID
> table using of_device_match_data() if the devices are registered via OF.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

> ---
> v2->v3:
>  * Removed fixes tag as nothing broken.
>  * Added Rb tag from Andy.
> v2:
>  * New patch.
> ---
>  drivers/gpu/drm/bridge/ite-it66121.c | 19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
> index 466641c77fe9..ba95ad46e259 100644
> --- a/drivers/gpu/drm/bridge/ite-it66121.c
> +++ b/drivers/gpu/drm/bridge/ite-it66121.c
> @@ -1523,7 +1523,10 @@ static int it66121_probe(struct i2c_client *client)
>  
>  	ctx->dev = dev;
>  	ctx->client = client;
> -	ctx->info = (const struct it66121_chip_info *) id->driver_data;
> +	if (dev_fwnode(&client->dev))
> +		ctx->info = of_device_get_match_data(&client->dev);
> +	else
> +		ctx->info = (const struct it66121_chip_info *) id->driver_data;
>  
>  	of_property_read_u32(ep, "bus-width", &ctx->bus_width);
>  	of_node_put(ep);
> @@ -1609,13 +1612,6 @@ static void it66121_remove(struct i2c_client *client)
>  	mutex_destroy(&ctx->lock);
>  }
>  
> -static const struct of_device_id it66121_dt_match[] = {
> -	{ .compatible = "ite,it66121" },
> -	{ .compatible = "ite,it6610" },
> -	{ }
> -};
> -MODULE_DEVICE_TABLE(of, it66121_dt_match);
> -
>  static const struct it66121_chip_info it66121_chip_info = {
>  	.id = ID_IT66121,
>  	.vid = 0x4954,
> @@ -1628,6 +1624,13 @@ static const struct it66121_chip_info it6610_chip_info = {
>  	.pid = 0x0611,
>  };
>  
> +static const struct of_device_id it66121_dt_match[] = {
> +	{ .compatible = "ite,it66121", &it66121_chip_info },
> +	{ .compatible = "ite,it6610", &it6610_chip_info },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, it66121_dt_match);
> +
>  static const struct i2c_device_id it66121_id[] = {
>  	{ "it66121", (kernel_ulong_t) &it66121_chip_info },
>  	{ "it6610", (kernel_ulong_t) &it6610_chip_info },

-- 
Regards,

Laurent Pinchart