From bd73b36f0c41b0c02ef4b10a307db1c43537e006 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Tue, 23 Dec 2008 05:54:45 -0300 Subject: V4L/DVB (10072): soc-camera: Add signal inversion flags to be used by camera drivers As reported by Antonio Ospite two platforms with a mt9m111 camera require opposite pixel clock polarity, which means one of them inverts it. This patch adds support for inversion flags and switches all available camera drivers to using them. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/soc_camera.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'drivers/media/video/soc_camera.c') diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index 5e48c2cc1a4..17601750105 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -59,6 +59,40 @@ const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( } EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); +/** + * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags + * @icl: camera platform parameters + * @flags: flags to be inverted according to platform configuration + * @return: resulting flags + */ +unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, + unsigned long flags) +{ + unsigned long f; + + /* If only one of the two polarities is supported, switch to the opposite */ + if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { + f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); + if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) + flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; + } + + if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { + f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); + if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) + flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; + } + + if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { + f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); + if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) + flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; + } + + return flags; +} +EXPORT_SYMBOL(soc_camera_apply_sensor_flags); + static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { -- cgit v1.2.3