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Date:   Thu, 3 Oct 2019 13:09:09 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
To:     Gon Solo <gonsolo@gmail.com>
Cc:     JP <jp@jpvw.nl>, crope@iki.fi, Sean Young <sean@mess.org>,
        linux-media@vger.kernel.org,
        Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] si2157: Add support for Logilink VG0022A.
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Em Thu, 3 Oct 2019 18:03:36 +0200
Gon Solo <gonsolo@gmail.com> escreveu:

> > With the original patch you proposed, what are the logs?  
> 
> With the following patch applied to media_tree master:
> 
> diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
> index e87040d6eca7..4c1ab0b6876a 100644
> --- a/drivers/media/tuners/si2157.c
> +++ b/drivers/media/tuners/si2157.c
> @@ -129,13 +129,14 @@ static int si2157_init(struct dvb_frontend *fe)
>  	chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
>  			cmd.args[4] << 0;
>  
> -	#define SI2177_A30 ('A' << 24 | 77 << 16 | '3' << 8 | '0' << 0)
> -	#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
> -	#define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
> -	#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
> -	#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
> -	#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
> -	#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
> +	#define SI2177_A30 ('A' << 24 |  77 << 16 | '3' << 8 | '0' << 0)
> +	#define SI2158_A20 ('A' << 24 |  58 << 16 | '2' << 8 | '0' << 0)
> +	#define SI2148_A20 ('A' << 24 |  48 << 16 | '2' << 8 | '0' << 0)
> +	#define SI2157_A30 ('A' << 24 |  57 << 16 | '3' << 8 | '0' << 0)
> +	#define SI2147_A30 ('A' << 24 |  47 << 16 | '3' << 8 | '0' << 0)
> +	#define SI2146_A10 ('A' << 24 |  46 << 16 | '1' << 8 | '0' << 0)
> +	#define SI2141_A10 ('A' << 24 |  41 << 16 | '1' << 8 | '0' << 0)
> +	#define SI_BOGUS   (255 << 24 | 255 << 16 | 255 << 8 | 255 << 0)
>  
>  	switch (chip_id) {
>  	case SI2158_A20:
> @@ -148,6 +149,10 @@ static int si2157_init(struct dvb_frontend *fe)
>  	case SI2177_A30:
>  		fw_name = SI2157_A30_FIRMWARE;
>  		break;
> +	case SI_BOGUS:
> +		dev_info(&client->dev, "Bogus chip version, trying with no firmware\n");
> +		fw_name = NULL;
> +		break;
>  	case SI2157_A30:
>  	case SI2147_A30:
>  	case SI2146_A10:
> @@ -225,6 +230,7 @@ static int si2157_init(struct dvb_frontend *fe)
>  
>  	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
>  			cmd.args[6], cmd.args[7], cmd.args[8]);
>  warm:
>  	/* init statistics in order signal app which are supported */
>  	c->strength.len = 1;
> diff --git a/drivers/media/usb/dvb-usb-v2/af9035.c b/drivers/media/usb/dvb-usb-v2/af9035.c
> index 3afd18733614..a8d59cf06b1e 100644
> --- a/drivers/media/usb/dvb-usb-v2/af9035.c
> +++ b/drivers/media/usb/dvb-usb-v2/af9035.c
> @@ -1197,6 +1197,11 @@ static int af9035_frontend_attach(struct dvb_usb_adapter *adap)
>  	return ret;
>  }
>  
> +/* I2C speed register = (1000000000 / (24.4 * 16 * I2C_speed))
> + * 7 equals ~400k, 26 ~100k and 260 ~10k.
> + * */
> +#define I2C_SPEED_REGISTER 7
> +
>  static int it930x_frontend_attach(struct dvb_usb_adapter *adap)
>  {
>  	struct state *state = adap_to_priv(adap);
> @@ -1208,13 +1213,13 @@ static int it930x_frontend_attach(struct dvb_usb_adapter *adap)
>  
>  	dev_dbg(&intf->dev, "adap->id=%d\n", adap->id);
>  
> -	/* I2C master bus 2 clock speed 300k */
> -	ret = af9035_wr_reg(d, 0x00f6a7, 0x07);
> +	/* I2C master bus 2 clock speed */
> +	ret = af9035_wr_reg(d, 0x00f6a7, I2C_SPEED_REGISTER);
>  	if (ret < 0)
>  		goto err;
>  
> -	/* I2C master bus 1,3 clock speed 300k */
> -	ret = af9035_wr_reg(d, 0x00f103, 0x07);
> +	/* I2C master bus 1,3 clock speed */
> +	ret = af9035_wr_reg(d, 0x00f103, I2C_SPEED_REGISTER);
>  	if (ret < 0)
>  		goto err;
>  
> @@ -2119,6 +2124,8 @@ static const struct usb_device_id af9035_id_table[] = {
>  	/* IT930x devices */
>  	{ DVB_USB_DEVICE(USB_VID_ITETECH, USB_PID_ITETECH_IT9303,
>  		&it930x_props, "ITE 9303 Generic", NULL) },
> +	{ DVB_USB_DEVICE(USB_VID_DEXATEK, 0x0100,
> +		&it930x_props, "Logilink VG0022A", NULL) },
>  	{ DVB_USB_DEVICE(USB_VID_AVERMEDIA, USB_PID_AVERMEDIA_TD310,
>  		&it930x_props, "AVerMedia TD310 DVB-T2", NULL) },
>  	{ }
> 
> the Messages at boot time are
> 
> [    4.262882] si2168 1-0067: Silicon Labs Si2168-B40 successfully identified
> [    4.262884] si2168 1-0067: firmware version: B 4.0.2
> [    4.262902] usb 2-1: DVB: registering adapter 0 frontend 0 (Silicon Labs Si2168)...
> [    4.262908] dvbdev: dvb_create_media_entity: media entity 'Silicon Labs Si2168' registered.
> [    4.289776] si2157 2-0063: Silicon Labs Si2147/2148/2157/2158 successfully attached
> 
> and the messages when running vlc (successfully) are
> 
> [  486.537128] si2168 1-0067: downloading firmware from file 'dvb-demod-si2168-b40-01.fw'
> [  487.795436] si2168 1-0067: firmware version: B 4.0.25
> [  487.807614] si2157 2-0063: Bogus chip version, trying with no firmware
> [  487.807618] si2157 2-0063: found a 'Silicon Labs Si21255-\xff\xff\xff'
> [  487.833876] si2157 2-0063: firmware version: \xff.\xff.255

No, I mean with the first patch you sent to the ML, with the powerup
hack.


Thanks,
Mauro