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Hi,
On the beagleboard we have the omapfb hooked up to a DVI framer
(TFP410), with the EDID hooked up to omap-i2c bus 3[1]. The 'problem'
we have is that we don't have a way to switch resolution in userspace
because of this:
drivers/video/omap/lcd_omap3beagle.c
#define LCD_XRES 1600
#define LCD_YRES 1200
#define LCD_PIXCLOCK 65000 /* in kHz */
[..]
struct lcd_panel omap3beagle_panel = {
.name = "omap3beagle",
.config = OMAP_LCDC_PANEL_TFT,
.bpp = 24,
.data_lines = 24,
.x_res = LCD_XRES,
.y_res = LCD_YRES,
[..]
That hardcodes the resolution and bitdepth :(
Ideally the kernel would read and parse the EDID and adjust the
resolution accordingly. We could use the fb_ddc driver:
int beagleboard_probe_i2c_connector(struct fb_info *info, u8
**out_edid)
{
struct beagleboardfb_par *par = info->par;
u8 *edid = NULL;
DPRINTK("beagleboard DVI: Probe DDC\n);
edid = fb_ddc_read(&omap3-i2c.3);
*out_edid = edid;
return (edid) ? 0 : 1;
}
But I don't see a way make that work with omapfb and lcd_omap3beagle.
Does anyone have a suggestion on how to make this work? And after
that, how can we hook in the image and videoplane migration between
the DVI and s-video port?
regards,
Koen
[1]
root@beagleboard:/usr/sbin# decode-edid
decode-edid: using bus 3 (autodetected)
decode-edid: decode-edid version 1.1
parse-edid: parse-edid version 1.4.1
parse-edid: EDID checksum passed.
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
Identifier "AU5131 "
VendorName "IVM"
ModelName "AU5131 "
# Block type: 2:0 3:fd
HorizSync 24-80
VertRefresh 50-85
# Max dot clock (video bandwidth) 160 MHz
# Block type: 2:0 3:fc
# Block type: 2:0 3:ff
# DPMS capabilities: Active off:yes Suspend:yes Standby:yes
Mode "1600x1200" # vfreq 60.000Hz, hfreq 75.000kHz
DotClock 162.000000
HTimings 1600 1664 1856 2160
VTimings 1200 1201 1204 1250
Flags "+HSync" "+VSync"
EndMode
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
# Block type: 2:0 3:ff
EndSection
root@beagleboard:/usr/sbin#
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