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Subject: [media] media: ov7670: Add possibility to disable pixclk during hblank Author: Javier Martin <javier.mar...@vista-silicon.com> Date: Tue Jan 29 07:26:38 2013 -0300 Some bridge drivers capture pixels during blanking periods if pixclk is enabled. In order to avoid capturing bogus data we need to disable pixclk in the sensor during those blanking periods. Acked-by: Jonathan Corbet <cor...@lwn.net> Signed-off-by: Javier Martin <javier.mar...@vista-silicon.com> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com> drivers/media/i2c/ov7670.c | 7 +++++++ include/media/ov7670.h | 1 + 2 files changed, 8 insertions(+), 0 deletions(-) --- http://git.linuxtv.org/media_tree.git?a=commitdiff;h=ee95258ed3926f3aa2cf8d62e62cd51be466fe26 diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c index 3e50339..52c024a 100644 --- a/drivers/media/i2c/ov7670.c +++ b/drivers/media/i2c/ov7670.c @@ -231,6 +231,7 @@ struct ov7670_info { u8 clkrc; /* Clock divider value */ bool use_smbus; /* Use smbus I/O instead of I2C */ bool pll_bypass; + bool pclk_hb_disable; const struct ov7670_devtype *devtype; /* Device specifics */ }; @@ -1712,6 +1713,9 @@ static int ov7670_probe(struct i2c_client *client, */ if (config->pll_bypass && id->driver_data != MODEL_OV7670) info->pll_bypass = true; + + if (config->pclk_hb_disable) + info->pclk_hb_disable = true; } /* Make sure it's an ov7670 */ @@ -1736,6 +1740,9 @@ static int ov7670_probe(struct i2c_client *client, tpf.denominator = 30; info->devtype->set_framerate(sd, &tpf); + if (info->pclk_hb_disable) + ov7670_write(sd, REG_COM10, COM10_PCLK_HB); + return 0; } diff --git a/include/media/ov7670.h b/include/media/ov7670.h index a68c8bb..1913d51 100644 --- a/include/media/ov7670.h +++ b/include/media/ov7670.h @@ -16,6 +16,7 @@ struct ov7670_config { int clock_speed; /* External clock speed (MHz) */ bool use_smbus; /* Use smbus I/O instead of I2C */ bool pll_bypass; /* Choose whether to bypass the PLL */ + bool pclk_hb_disable; /* Disable toggling pixclk during horizontal blanking */ }; #endif _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
