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phy: rockchip: mipi-dcphy: fix null point cause reboot issue

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In camera preview state, press the power button to standby,
then press the power button immediately to wake up,
machine will reboot, so fix it.

Call trace:
 samsung_mipi_dcphy_power_on+0x68/0xc80 [phy_rockchip_samsung_dcphy]
 phy_power_on+0xa4/0x124
 dw_mipi_dsi2_pre_enable+0x350/0x364 [rockchipdrm]
 dw_mipi_dsi2_encoder_atomic_enable+0x308/0x3d0 [rockchipdrm]
 drm_atomic_helper_commit_modeset_enables+0x158/0x2ec
 rockchip_drm_atomic_helper_commit_tail_rpm+0x50/0x2f8 [rockchipdrm]
 commit_tail+0xbc/0x170
 drm_atomic_helper_commit+0x1f4/0x218
 drm_atomic_commit+0xbc/0xec
 drm_mode_atomic_ioctl+0x59c/0x70c
 drm_ioctl_kernel+0xf8/0x184
 drm_ioctl+0x2cc/0x528
 __arm64_sys_ioctl+0xa8/0xe4
 invoke_syscall+0x58/0x11c
 el0_svc_common+0xb4/0xf4
 do_el0_svc+0x2c/0xb0
 el0_svc+0x2c/0xa4
 el0t_64_sync_handler+0x68/0xb4
 el0t_64_sync+0x1a0/0x1a4
Code: 95d7b2de b9408a68 34000b48 f9403e76 (f9407ad4)
---[ end trace 0000000000000000 ]---

Signed-off-by: Wang Panzhenzhuan <randy.wang@rock-chips.com>
Change-Id: Ie15e7cef29821683731d56ff5c4ceb924e340bb5
This commit is contained in:
Wang Panzhenzhuan
2023-10-28 01:29:28 +00:00
committed by Tao Huang
parent 42f4aa0733
commit 80ef6aeac0
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
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@@ -1744,7 +1744,7 @@ static int samsung_mipi_dcphy_power_on(struct phy *phy)
reset_control_assert(samsung->apb_rst);
udelay(1);
reset_control_deassert(samsung->apb_rst);
if (atomic_read(&samsung->stream_cnt)) {
if (atomic_read(&samsung->stream_cnt) && samsung->dphy_dev[0]) {
sensor_sd = get_remote_sensor(&samsung->dphy_dev[0]->sd);
samsung->stream_off(samsung->dphy_dev[0], &samsung->dphy_dev[0]->sd);
if (sensor_sd)