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| author | Joel Stanley <joel@jms.id.au> | 2020-09-16 11:34:13 +0300 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2020-10-09 04:18:33 +0300 |
| commit | 696029eb36c08d7b60097cae44a6269bfa68b51c (patch) | |
| tree | cfb9b98171f16f50b986d270a0f6e3eab8f68e3d /drivers/gpu/drm/drm_atomic_helper.c | |
| parent | 82e1b93ad8b95a1667708164220ed137d6f3adfb (diff) | |
| download | linux-696029eb36c08d7b60097cae44a6269bfa68b51c.tar.xz | |
drm/aspeed: Add sysfs for output settings
These settings are used by an ASPEED BMC to determine when the host is
trying to drive the display over PCIe (vga_pw) and to switch the
output between PCIe and the internal graphics device (dac_mux).
The valid values for the dac mux are:
00: VGA mode (default, aka PCIe)
01: Graphics CRT (aka BMC internal graphics, this driver)
10: Pass through mode from video input port A
11: Pass through mode from video input port B
Values for the read-only vga password register are:
1: Host driving the display
0: Host not driving the display
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://patchwork.freedesktop.org/patch/msgid/20200916083413.777307-1-joel@jms.id.au
Diffstat (limited to 'drivers/gpu/drm/drm_atomic_helper.c')
0 files changed, 0 insertions, 0 deletions