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rockchip: display: handle error when there is no 'mcu-timing' 

The 'mcu-timing' may not in dts, and the following access will
cause assert of invalid of_node.

Change-Id: I98cfed0de471b8985642e7ffc14ab2e97ef6f575
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Kever Yang 2018-11-15 15:57:09 +08:00
parent dcb7870427
commit a196d7fc6a
1 changed files with 2 additions and 0 deletions
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2
drivers/video/drm/rockchip_display.c
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@ -1040,6 +1040,8 @@ static int get_crtc_mcu_mode(struct crtc_state *crtc_state)
int total_pixel, cs_pst, cs_pend, rw_pst, rw_pend;
mcu_node = dev_read_subnode(crtc_state->dev, "mcu-timing");
if (!ofnode_valid(mcu_node))
return -ENODEV;
#define FDT_GET_MCU_INT(val, name) \
do { \