For virtual display feature, use the software timer to
simulate the vsync interrupt.
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For virtual display feature, when the GPU has DCE engine, need to disable
the VGA render and CRTC, or it will hang when initialize GMC.
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For virtual display feature, initialize dce_virtual_crtc_funcs.

v2: agd: rebase on upstream
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For virtual display feature, initialize dce_virtual_crtc_helper_funcs.
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For virtual display feature, initialize dce_virtual_crtc_irq_funcs,
dce_virtual_pageflip_irq_funcs. As it has no dce engine, so the
pageflip interrupt won't be generated, and the vsync interrupt will
be generated by smu's periodic timer or software timer which will
be implemented later.

v2: agd: rebase on upstream
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For virtual display feature, initialize dce_virtual_display_funcs,
which will be used in function dce_virtual_set_display_funcs.
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For virtual display feature, first need to initialize dce_virtual_ip_funcs,
which will be used when set ip blocks.
Signed-off-by: NEmily Deng <Emily.Deng@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>