From mboxrd@z Thu Jan 1 00:00:00 1970 From: zyw@rock-chips.com (Chris Zhong) Date: Wed, 8 Mar 2017 10:27:57 +0800 Subject: [PATCH 3/3] drm/rockchip: cdn-dp: add more log for video config In-Reply-To: <1488940077-22297-1-git-send-email-zyw@rock-chips.com> References: <1488940077-22297-1-git-send-email-zyw@rock-chips.com> Message-ID: <1488940077-22297-4-git-send-email-zyw@rock-chips.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org In order to analyze some video config failed, add some useful printouts. Signed-off-by: Chris Zhong --- drivers/gpu/drm/rockchip/cdn-dp-reg.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/rockchip/cdn-dp-reg.c b/drivers/gpu/drm/rockchip/cdn-dp-reg.c index 963d8ab..b14d211 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) || -- 2.6.3