[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 cb42a5182d1741798825c34382fdc9bfd4662bf0..b17c6604eb4156cd111a8ca855a1012a0ac86aef 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;