[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 <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
yshchan · Jul 27, 2011 · b877a9a · b877a9a
1 parent 686a948
commit b877a9a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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;