From b877a9a7fb00d96bae4ab49c69f1be65b3e87e61 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jean-Fran=C3=A7ois=20Moine?= Date: Sun, 3 Jul 2011 05:17:27 -0300 Subject: [PATCH] [media] gspca - ov519: Fix sensor detection problems MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 --- drivers/media/video/gspca/ov519.c | 3 +++ 1 file changed, 3 insertions(+) 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; -- 2.34.1