Add special VGA_PLANE_FRAMEBUFFER_OFFSET that, if set on the primary
pipe, toggles the use of the legacy VGA plane instead of the `hires`
plane.
The caller is responsible for the configuration of the VGA plane and
has to specify the framebuffer width and height accordingly.
Change-Id: I9f678fe033d835c9183fbb2d2b05b6585eb545ca
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17276
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
If the framebuffer size is smaller than the display mode's resolution,
enable the panel fitter or pipe scaler (on Skylake+).
Change-Id: I0a648a7e7bf495a80636a589a74b698ecba7e7d5
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17263
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: Nico Huber <nico.h@gmx.de>
Now that we are going to use scaling and have framebuffer sizes dif-
ferent from the display mode's resolution, it's crucial to put the
right size (i.e. the unscaled framebuffer size) into PIPESRC.
Change-Id: Ieb4b5c3960490e286d44c982c28f7ff729ecd84b
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17264
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
When deciding if a pipe has been configured, we only checked if reading
the EDID succeeded not if it contained usable data.
TEST=Booted kontron/ktqm77 with a DVI-I to VGA cable and the display
came up (it didn't before because of a gap in the pipe config, i.e.
the second pipe was disabled so coreboot didn't bother to look at
the third).
Change-Id: I10075db8916efcee68be95971145c3f6f1530e5a
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17087
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Boards with a DVI-I connector share the I2C pins for both analog and
digital displays. In that case, the EDID for a VGA display has to be
read over the I2C interface of the coupled digital port.
TEST=Booted kontron/ktqm77 with DVI-I to VGA cable. Display is detected
and enabled (but doesn't show anything, yet?).
Change-Id: I5c4f77d5ad1927f075877a3719361ed2193f4c39
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17086
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This setting exists for any platform before Skylake. Some have sane
defaults after reset, some don't. So we always set the correct divisor.
This makes external DP output work with coreboot on Ivy Bridge.
Change-Id: I91d8030a985cc35c7cf826c0276753137b5d6b77
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17072
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This seems to be a scratchpad register to tell later drivers which
frequency the platform uses. Linux reads this but never writes the
register.
Change-Id: I55af7c7b675da580c7f52d9997262b232019132c
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17071
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This very stale code only ever worked because it left old settings in-
tact (i.e. settings done by the Video BIOS). So initialize everything
needed for known LVDS displays to work.
TEST=none so far
Change-Id: If5dcc186ca1d4a07deb2ca78f018d613f5e029ad
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/17022
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
