From: Chris Zhong Date: Wed, 8 Mar 2017 02:27:57 +0000 (+0800) Subject: drm/rockchip: cdn-dp: add more log for video config X-Git-Tag: v4.12-rc1~116^2~27^2~29 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=9346ab7d72c0e0526bd9cea70fa4ad768fe27c20;p=linux.git drm/rockchip: cdn-dp: add more log for video config In order to analyze some video config failed, add some useful printouts. Signed-off-by: Chris Zhong Signed-off-by: Sean Paul Link: http://patchwork.freedesktop.org/patch/msgid/1488940077-22297-4-git-send-email-zyw@rock-chips.com --- diff --git a/drivers/gpu/drm/rockchip/cdn-dp-reg.c b/drivers/gpu/drm/rockchip/cdn-dp-reg.c index 963d8abec463..b14d211f6c21 100644 --- a/drivers/gpu/drm/rockchip/cdn-dp-reg.c +++ b/drivers/gpu/drm/rockchip/cdn-dp-reg.c @@ -671,6 +671,10 @@ int cdn_dp_config_video(struct cdn_dp_device *dp) rem = do_div(symbol, 1000); if (tu_size_reg > 64) { ret = -EINVAL; + DRM_DEV_ERROR(dp->dev, + "tu error, clk:%d, lanes:%d, rate:%d\n", + mode->clock, dp->link.num_lanes, + link_rate); goto err_config_video; } } while ((symbol <= 1) || (tu_size_reg - symbol < 4) ||