Hello, > In the case we set it to 4, the DISPC_FCLK is fast enough to do the required > downscaling, but in the case when it's set to 0, it might need to pre decimate > rather than try to scale. this is my understanding as well > > I think there is a bug downscaling YUV data when resorting to > > pre-decimation; setting CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK is a workaround > > -- any ideas how this can be fixed? > Pre-decimation should work for YUV formats also. Could you share DISPC reg > dumps when this happens: > > mount -t debugfs debugfs /sys/kernel/debug > cat /sys/kernel/debug/omapdss/dispc please find the files http://pmeerw.net/ok.dispc (with FCK_PER_PCK=4) and http://pmeerw.net/fail.dispc (FCK_PER_PCK=0) thanks, p. -- Peter Meerwald +43-664-2444418 (mobile) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
