From: Jean-François Moine Date: Sun, 3 Jul 2011 08:17:27 +0000 (-0300) Subject: [media] gspca - ov519: Fix sensor detection problems X-Git-Tag: firefly_0821_release~3680^2~4808^2~175 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b877a9a7fb00d96bae4ab49c69f1be65b3e87e61;p=firefly-linux-kernel-4.4.55.git [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 Signed-off-by: Mauro Carvalho Chehab --- 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;