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V4L/DVB (6340): ivtvfb: screen mode change sometimes goes wrong

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This patch partially reverts a previous change that caused the
CX2341X_OSD_SET_PIXEL_FORMAT firmware calls to be skipped when the pixel
format of the framebuffer wasn't altered by FBIOPUT_VSCREENINFO.

Unfortunately, another firmware call on the PVR350 sometimes scrambles the
display when trying to adjust the framebuffer settings. This patch re-enables
the CX2341X_OSD_SET_PIXEL_FORMAT calls to try and prevent this from
occurring.

Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Ian Armstrong 2007-10-12 08:15:41 -03:00 committed by Mauro Carvalho Chehab
parent 4339ab9365
commit 6659e3ed55
1 changed files with 3 additions and 11 deletions
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14
drivers/media/video/ivtv/ivtvfb.c
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@ -166,9 +166,6 @@ struct osd_info {
unsigned long fb_end_aligned_physaddr;
#endif
/* Current osd mode */
int osd_mode;
/* Store the buffer offset */
int set_osd_coords_x;
int set_osd_coords_y;
@ -470,13 +467,11 @@ static int ivtvfb_set_var(struct ivtv *itv, struct fb_var_screeninfo *var)
IVTVFB_DEBUG_WARN("ivtvfb_set_var - Invalid bpp\n");
}
/* Change osd mode if needed.
Although rare, things can go wrong. The extra mode
change seems to help... */
if (osd_mode != -1 && osd_mode != oi->osd_mode) {
/* Set video mode. Although rare, the display can become scrambled even
if we don't change mode. Always 'bounce' to osd_mode via mode 0 */
if (osd_mode != -1) {
ivtv_vapi(itv, CX2341X_OSD_SET_PIXEL_FORMAT, 1, 0);
ivtv_vapi(itv, CX2341X_OSD_SET_PIXEL_FORMAT, 1, osd_mode);
oi->osd_mode = osd_mode;
}
oi->bits_per_pixel = var->bits_per_pixel;
@ -882,9 +877,6 @@ static int ivtvfb_init_vidmode(struct ivtv *itv)
oi->bits_per_pixel = osd_depth;
oi->bytes_per_pixel = oi->bits_per_pixel / 8;
/* Invalidate current osd mode to force a mode switch later */
oi->osd_mode = -1;
/* Horizontal size & position */
if (osd_xres > 720) osd_xres = 720;