[media] gspca - ov519: Fix sensor detection problems

The sensor of some webcams could not be detected due to timing problems
in sensor register reading. This patch adds bridge register readings
before sensor register reading.

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/ov519.c b/drivers/media/video/gspca/ov519.c
index cb42a51..b17c660 100644 (file)
--- a/drivers/media/video/gspca/ov519.c
+++ b/drivers/media/video/gspca/ov519.c
@@ -2432,9 +2432,12 @@ static int ov518_i2c_r(struct sd *sd, u8 reg)
 
        /* Initiate 2-byte write cycle */
        reg_w(sd, R518_I2C_CTL, 0x03);
+       reg_r8(sd, R518_I2C_CTL);
 
        /* Initiate 2-byte read cycle */
        reg_w(sd, R518_I2C_CTL, 0x05);
+       reg_r8(sd, R518_I2C_CTL);
+
        value = reg_r(sd, R51x_I2C_DATA);
        PDEBUG(D_USBI, "ov518_i2c_r %02x %02x", reg, value);
        return value;