From 1ca27379f3673b40edbd2fec53b93c993fdb4f0c Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 21:45:46 -0300 Subject: V4L/DVB (11913): cx231xx: TRY_FMT should not actually set anything In the TRY_FMT handler the function get_scale() is called to find what the scaler hardware will produce for a requested size. The problem is that get_scale(struct cx231xx *dev, ..., unsigned int *vscale, unsigned int *hscale) saves the calculated scale values into both the pointer arguments and into dev's hscale and vscale fields. TRY_FMT shouldn't actually change anything in the device state. The code to in get_scale() that writes to dev->[hv]scale can just be deleted. In all cases when dev's fields should be modified, get_scale() was called with get_scale(dev, ..., &dev->hscale, &dev->vscale), so dev was getting updated anyway. This didn't actually cause a problem because nothing ever actually made use of the hscale and vscale fields. I changed cx231xx_resolution_set() to use those fields rather than re-calculate them with a call to get_scale(). Updating [hv]scale in cx231xx_resolution_set() isn't necessary because every call of cx231xx_resolution_set() was already preceded by a call to get_scale() or setting the [hv]scale fields, so they will be always be up-to-date w.r.t. width and height. Removing the call to get_scale() from cx231xx_resolution_set() allowed making get_scale() a static function, which is a good thing for something with such a short name. There is already another function with the same name in the em28xx driver, but that one is static. Signed-off-by: Trent Piepho Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx231xx/cx231xx.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'drivers/media/video/cx231xx/cx231xx.h') diff --git a/drivers/media/video/cx231xx/cx231xx.h b/drivers/media/video/cx231xx/cx231xx.h index e38eb2d..a0f823a 100644 --- a/drivers/media/video/cx231xx/cx231xx.h +++ b/drivers/media/video/cx231xx/cx231xx.h @@ -722,9 +722,6 @@ int cx231xx_set_video_input_mux(struct cx231xx *dev, u8 input); int cx231xx_set_decoder_video_input(struct cx231xx *dev, u8 pin_type, u8 input); int cx231xx_do_mode_ctrl_overrides(struct cx231xx *dev); int cx231xx_set_audio_input(struct cx231xx *dev, u8 input); -void get_scale(struct cx231xx *dev, - unsigned int width, unsigned int height, - unsigned int *hscale, unsigned int *vscale); /* Provided by cx231xx-video.c */ int cx231xx_register_extension(struct cx231xx_ops *dev); -- cgit v1.1