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Commit 31d60f1b authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] rtl28xxu: return demod reg page from driver cache 



Return current active rtl2830/rtl2832 register page from the driver
cache in order to reduce I2C I/O. Register page is already cached
due to I2C write needs.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 95847f40

drivers/media/usb/dvb-usb-v2/rtl28xxu.c

+11 −5
Original line number Diff line number Diff line
@@ -181,11 +181,17 @@ static int rtl28xxu_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], 
			goto err_mutex_unlock;

		} else if (msg[0].addr == 0x10) {

			/* method 1 - integrated demod */

			if (msg[0].buf[0] == 0x00) {

				/* return demod page from driver cache */

				msg[1].buf[0] = dev->page;

				ret = 0;

			} else {

				req.value = (msg[0].buf[0] << 8) | (msg[0].addr << 1);

				req.index = CMD_DEMOD_RD | dev->page;

				req.size = msg[1].len;

				req.data = &msg[1].buf[0];

				ret = rtl28xxu_ctrl_msg(d, &req);

			}

		} else if (msg[0].len < 2) {

			/* method 2 - old I2C */

			req.value = (msg[0].buf[0] << 8) | (msg[0].addr << 1);