Re: Howto configure borderless 4:3 tv-out on n900?
Till Harbaum / Lists wrote: The problem is the horizontal stretch. You can't write to /sys/devices/platform/omapdss/overlay2/input_size and by checking what the media player does i found out that it actually changes this to 640x480 when playing a 4:3 video. Unfortunately the /sys interface doesn't allow to write these, so i'll have a look at the ioctls next. Yes, the ioctls will allow you to change the fb size, thus implicitly change the associated overlays' input_size. There's a nice cmd line utility (fbset) to do this (which is not packaged but I plan to do), and we've been toying with this for emus (see IRC). Unfortunately, I doubt you can change the SGX framebuffer size without restarting the SGX or crashing hildon-desktop at least. So this is limited to programs that have the extra framebuffer device in mind. -- Javier ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: Howto configure borderless 4:3 tv-out on n900?
Hi, thanks for your reply. I fiddled a little bit around with this. It's pretty easy to stretch the image vertically to full screen. You just need to set echo 640,480 /sys/devices/platform/omapdss/overlay2/output_size and echo 42,30 /sys/devices/platform/omapdss/overlay2/position The media player does the same. The problem is the horizontal stretch. You can't write to /sys/devices/platform/omapdss/overlay2/input_size and by checking what the media player does i found out that it actually changes this to 640x480 when playing a 4:3 video. Unfortunately the /sys interface doesn't allow to write these, so i'll have a look at the ioctls next. Till Am Freitag 19 März 2010 schrieb Frantisek Dufka: I don't know if there is some high level api but a lot of things can be done either via framebuffer ioctl or via changing stuff in /sys/dev/ices/platform/omapdss/ see http://gitorious.org/linux-omap-dss2/linux/blobs/master/Documentation/arm/OMAP/DSS Having full PAL or NTSC with no translation/scaling would be good both for games and video playback too. So far I have only succeeded to change the default 800x480 - TV scaling to be a bit better so it is no longer fuzzy due to extra downscaling. On my TV I can get exactly 480 lines visible in PAL mode which makes reading text much better. http://talk.maemo.org/showthread.php?p=461660#post461660 For NTSC output (640x480) it would be enough to render to part of the screen and set the size and offset accordingly. For full PAL it would need resizing framebuffer to get more lines (ioctl?). I wonder how OMAP3 display controller features (gfx,vid1,vid2 planes, scaling, mirroring, rotation, tv-out) are mapped to Xv and other X APIs. Frantisek ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: Howto configure borderless 4:3 tv-out on n900?
I don't know if there is some high level api but a lot of things can be done either via framebuffer ioctl or via changing stuff in /sys/dev/ices/platform/omapdss/ see http://gitorious.org/linux-omap-dss2/linux/blobs/master/Documentation/arm/OMAP/DSS Having full PAL or NTSC with no translation/scaling would be good both for games and video playback too. So far I have only succeeded to change the default 800x480 - TV scaling to be a bit better so it is no longer fuzzy due to extra downscaling. On my TV I can get exactly 480 lines visible in PAL mode which makes reading text much better. http://talk.maemo.org/showthread.php?p=461660#post461660 For NTSC output (640x480) it would be enough to render to part of the screen and set the size and offset accordingly. For full PAL it would need resizing framebuffer to get more lines (ioctl?). I wonder how OMAP3 display controller features (gfx,vid1,vid2 planes, scaling, mirroring, rotation, tv-out) are mapped to Xv and other X APIs. Frantisek ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
RE: Howto configure borderless 4:3 tv-out on n900?
Hi, I suggest you play around with xvattr (http://freshmeat.net/projects/xvattr/), which you can use to set various Xv extension attributes, like XV_OMAP_TVOUT_SCALE and XV_OMAP_TVOUT_WIDESCREEN. I'm not sure if you can find it any maemo repository, but you can compile it from source as it is freely available in fresmeat. --Roope -Original Message- From: maemo-developers-boun...@maemo.org [mailto:maemo-developers-boun...@maemo.org] On Behalf Of ext Till Harbaum / Lists Sent: 18 March, 2010 21:37 To: maemo-developers@maemo.org Subject: Howto configure borderless 4:3 tv-out on n900? Hi, there seems to be an API to change the behaviour of the TV output on the n900. At least the media player uses it to e.g. display things with a different layout on the internal screen and the tv-out. I am asking this because i think it's a great thing to add to all those 640x480 (4:3) programs and especially emulators. The problem these have is that the have a black border left and right to accomodate for the 800x480 main screen and on tv-out they get another top and bottom border to display the entire internal display contents on the tv-out. The result is a 4:3 image on the 4:3 tv-out with black borders on all four sides and with pixels being lost. This isn't useful at all. I would be really cool if these applications could just request the tv.out to zoom/crop the 4:3 tv-output. That way most emulated games would run full screen and without any pixel loss. How can this be achieved? Till ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: Howto configure borderless 4:3 tv-out on n900?
On Friday 19 March 2010 09:16:14 Frantisek Dufka wrote: I don't know if there is some high level api but a lot of things can be done either via framebuffer ioctl or via changing stuff in /sys/dev/ices/platform/omapdss/ see http://gitorious.org/linux-omap-dss2/linux/blobs/master/Documentation/arm/O MAP/DSS Having full PAL or NTSC with no translation/scaling would be good both for games and video playback too. Can you (or anyone with intimate knowledge) chip in with some comments of how playing with these can (not) affect the devices (or what gets attached to them) ? I would like to play with this a bit, but don't want to burn down my DDP N900 with some weird video sync setting (been bitten by some unrelated hardware happily setting parameters that burned the video out down :) Regards, Attila ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: Howto configure borderless 4:3 tv-out on n900?
Attila Csipa wrote: Can you (or anyone with intimate knowledge) chip in with some comments of how playing with these can (not) affect the devices (or what gets attached to them) ? Well as long as you only write 'pal' or 'ntsc' to /sys/devices/platform/omapdss/display1/timings nothing should go wrong. It is not needed to mess with tv-out signal timings. It is only about what pixel data gets sent via tv-out (setting data source, position, size, scaling). ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: Howto configure borderless 4:3 tv-out on n900?
Attila Csipa wrote: Can you (or anyone with intimate knowledge) chip in with some comments of how playing with these can (not) affect the devices (or what gets attached to them) ? I would like to play with this a bit, but don't want to burn down my DDP N900 with some weird video sync setting (been bitten by some unrelated hardware happily setting parameters that burned the video out down :) Curiously enough, this very Monday I discovered that we could use the dispc for scaling (in emulators, etc) and have been doing tests for the entire week. You can do weird things like cloning the fb0 (the fb where the sgx renders) to multiple overlays while resizing one of them, and up so far everything still works normally after reboot. I wouldn't touch the lcd timings, and, as fanoush said, you can only write pal or ntsc to the tv-out device timings field. Now that the topic has been raised, I'd like to share what I've been considering for usage of the dispc in 2d games: - The system seems to use fb0 for sgx, and fb1 for xv surfaces. - The system seems to use overlay0 as the base overlay, overlay1 for xv apps: camera, media player (still have to check what happens when a single app has more than one xv surface, if that's even possible), and overlay2 for resizing the tv output. - Thus, when the system is not connected to tv-out, an app could potentially use some ioctls to initialize fb2, then use sysfs to connect it to overlay2 and draw it scaled on the lcd (and also, much like xv, use a special transparent color key on fb0). When the system is connected to tv-out, this app could save overlay2 state and push his own settings when foregrounded, then restore the previous ovly2 state when backgrounded. It could even work :), or so I think. -- Javier ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Howto configure borderless 4:3 tv-out on n900?
Hi, there seems to be an API to change the behaviour of the TV output on the n900. At least the media player uses it to e.g. display things with a different layout on the internal screen and the tv-out. I am asking this because i think it's a great thing to add to all those 640x480 (4:3) programs and especially emulators. The problem these have is that the have a black border left and right to accomodate for the 800x480 main screen and on tv-out they get another top and bottom border to display the entire internal display contents on the tv-out. The result is a 4:3 image on the 4:3 tv-out with black borders on all four sides and with pixels being lost. This isn't useful at all. I would be really cool if these applications could just request the tv.out to zoom/crop the 4:3 tv-output. That way most emulated games would run full screen and without any pixel loss. How can this be achieved? Till ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
