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7c90786eef
The &drm_crtc_helper_funcs.mode_valid() needs to know the output_type in order to correctly validate the drm mode, especially when HDMI request_clock > VOP2_MAX_DCLK_RATE. This should be set in dw_hdmi_rockchip_mode_valid(). When the HDMI is plugged in, the output_type has not yet been set when drm_mode_getconnector() is called for the first time. [ 951.213585][ T419] CPU: 0 PID: 419 Comm: hwc2-event Tainted: G OE 6.1.118 #117 [ 951.213596][ T419] Hardware name: Rockchip RK3576 TABLET V10 Board (DT) [ 951.213604][ T419] Call trace: [ 951.213612][ T419] dump_backtrace+0xf4/0x118 [ 951.213627][ T419] show_stack+0x18/0x24 [ 951.213636][ T419] dump_stack_lvl+0x60/0x7c [ 951.213647][ T419] dump_stack+0x18/0x38 [ 951.213657][ T419] dw_dp_encoder_mode_valid+0x78/0xac [rockchipdrm] [ 951.213812][ T419] drm_mode_validate_pipeline+0x128/0x1f4 [ 951.213824][ T419] __drm_helper_update_and_validate+0x120/0x210 [ 951.213834][ T419] drm_helper_probe_single_connector_modes+0x388/0x594 [ 951.213844][ T419] drm_mode_getconnector+0x260/0x5bc [ 951.213855][ T419] drm_ioctl_kernel+0xf8/0x184 [ 951.213864][ T419] drm_ioctl+0x2cc/0x528 [ 951.213872][ T419] __arm64_sys_ioctl+0xa8/0xe4 [ 951.213884][ T419] invoke_syscall+0x58/0x118 [ 951.213896][ T419] el0_svc_common+0xb4/0xf4 [ 951.213906][ T419] do_el0_svc+0x24/0x80 [ 951.213916][ T419] el0_svc+0x2c/0x90 [ 951.213926][ T419] el0t_64_sync_handler+0x68/0xb4 [ 951.213935][ T419] el0t_64_sync+0x1a4/0x1a8 [ 951.213974][ T419] CPU: 0 PID: 419 Comm: hwc2-event Tainted: G OE 6.1.118 #117 [ 951.213984][ T419] Hardware name: Rockchip RK3576 TABLET V10 Board (DT) [ 951.213991][ T419] Call trace: [ 951.213997][ T419] dump_backtrace+0xf4/0x118 [ 951.214006][ T419] show_stack+0x18/0x24 [ 951.214015][ T419] dump_stack_lvl+0x60/0x7c [ 951.214024][ T419] dump_stack+0x18/0x38 [ 951.214034][ T419] vop2_crtc_mode_valid+0x60/0x278 [rockchipdrm] [ 951.214163][ T419] drm_mode_validate_pipeline+0x1b8/0x1f4 [ 951.214173][ T419] __drm_helper_update_and_validate+0x120/0x210 [ 951.214183][ T419] drm_helper_probe_single_connector_modes+0x388/0x594 [ 951.214193][ T419] drm_mode_getconnector+0x260/0x5bc [ 951.214203][ T419] drm_ioctl_kernel+0xf8/0x184 [ 951.214211][ T419] drm_ioctl+0x2cc/0x528 [ 951.214220][ T419] __arm64_sys_ioctl+0xa8/0xe4 [ 951.214230][ T419] invoke_syscall+0x58/0x118 [ 951.214240][ T419] el0_svc_common+0xb4/0xf4 [ 951.214251][ T419] do_el0_svc+0x24/0x80 [ 951.214260][ T419] el0_svc+0x2c/0x90 [ 951.214270][ T419] el0t_64_sync_handler+0x68/0xb4 [ 951.214279][ T419] el0t_64_sync+0x1a4/0x1a8 Change-Id: Idbb7e760c8bde3f538b88e4d5e06a778b2fc387c Signed-off-by: chaoyi.chen <chaoyi.chen@rock-chips.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.