[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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/ov519.c b/drivers/media/video/gspca/ov519.c
index cb42a5182d17..b17c6604eb41 100644
--- 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;