This patch block the i2c tuner reads for Avermedia Twinstar. If it's
needed other pids can be added.
Signed-off-by: Jose Alberto Reguero <jareguero@xxxxxxxxxxxxxx>
diff -upr linux/drivers/media/usb/dvb-usb-v2/af9035.c linux.new/drivers/media/usb/dvb-usb-v2/af9035.c
--- linux/drivers/media/usb/dvb-usb-v2/af9035.c 2013-01-07 05:45:57.000000000 +0100
+++ linux.new/drivers/media/usb/dvb-usb-v2/af9035.c 2013-02-08 22:55:08.304089054 +0100
@@ -232,7 +232,11 @@ static int af9035_i2c_master_xfer(struct
buf[3] = 0x00; /* reg addr MSB */
buf[4] = 0x00; /* reg addr LSB */
memcpy(&buf[5], msg[0].buf, msg[0].len);
- ret = af9035_ctrl_msg(d, &req);
+ if (state->block_read) {
+ msg[1].buf[0] = 0x3f;
+ ret = 0;
+ } else
+ ret = af9035_ctrl_msg(d, &req);
}
} else if (num == 1 && !(msg[0].flags & I2C_M_RD)) {
if (msg[0].len > 40) {
@@ -638,6 +642,17 @@ static int af9035_read_config(struct dvb
for (i = 0; i < ARRAY_SIZE(state->af9033_config); i++)
state->af9033_config[i].clock = clock_lut[tmp];
+ state->block_read = false;
+
+ if (le16_to_cpu(d->udev->descriptor.idVendor) == USB_VID_AVERMEDIA &&
+ le16_to_cpu(d->udev->descriptor.idProduct) ==
+ USB_PID_AVERMEDIA_TWINSTAR) {
+ dev_dbg(&d->udev->dev,
+ "%s: AverMedia Twinstar: block i2c read from tuner\n",
+ __func__);
+ state->block_read = true;
+ }
+
return 0;
err:
diff -upr linux/drivers/media/usb/dvb-usb-v2/af9035.h linux.new/drivers/media/usb/dvb-usb-v2/af9035.h
--- linux/drivers/media/usb/dvb-usb-v2/af9035.h 2013-01-07 05:45:57.000000000 +0100
+++ linux.new/drivers/media/usb/dvb-usb-v2/af9035.h 2013-02-08 22:52:42.293842710 +0100
@@ -54,6 +54,7 @@ struct usb_req {
struct state {
u8 seq; /* packet sequence number */
bool dual_mode;
+ bool block_read;
struct af9033_config af9033_config[2];
};
--
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