The IPU needs an upper margin >= 2. Make this sure. This is based on Linux commit:
commit 6541d71082fdb91f862c92920c6530e4e0548d6f Author: Jiada Wang <[email protected]> Date: Thu Dec 18 18:00:20 2014 -0800 gpu: ipu-di: Add ipu_di_adjust_videomode() Signed-off-by: Sascha Hauer <[email protected]> --- drivers/video/imx-ipu-v3/ipufb.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/video/imx-ipu-v3/ipufb.c b/drivers/video/imx-ipu-v3/ipufb.c index e804c31..ebfcfcc 100644 --- a/drivers/video/imx-ipu-v3/ipufb.c +++ b/drivers/video/imx-ipu-v3/ipufb.c @@ -75,6 +75,31 @@ static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) return chan << bf->offset; } +static int ipu_crtc_adjust_videomode(struct ipufb_info *fbi, struct fb_videomode *mode) +{ + u32 diff; + + if (mode->lower_margin >= 2) + return 0; + + diff = 2 - mode->lower_margin; + + if (mode->upper_margin >= diff) { + mode->upper_margin -= diff; + } else if (mode->vsync_len > diff) { + mode->vsync_len = mode->vsync_len - diff; + } else { + dev_warn(fbi->dev, "failed to adjust videomode\n"); + return -EINVAL; + } + + mode->lower_margin = 2; + + dev_warn(fbi->dev, "videomode adapted for IPU restrictions\n"); + + return 0; +} + int ipu_crtc_mode_set(struct ipufb_info *fbi, struct fb_videomode *mode, int x, int y) @@ -109,6 +134,11 @@ int ipu_crtc_mode_set(struct ipufb_info *fbi, sig_cfg.v_start_width = mode->upper_margin; sig_cfg.v_sync_width = mode->vsync_len; + + ret = ipu_crtc_adjust_videomode(fbi, mode); + if (ret) + return ret; + sig_cfg.v_end_width = mode->lower_margin; sig_cfg.pixelclock = PICOS2KHZ(mode->pixclock) * 1000UL; sig_cfg.clkflags = di_mode.di_clkflags; -- 2.4.6 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
