diff options
| author | Nico Huber <nico.huber@secunet.com> | 2020-02-15 17:56:01 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-09 08:20:12 +0000 |
| commit | 4ce52903b00efa45d2ad8cd1f886553e2b21cf91 (patch) | |
| tree | ba91ff330275c5efbfc760495a9e5a97a0801f8a /Documentation/gfx | |
| parent | 9f3e734e5c3760ff30906862a3f9ca724ea5fffb (diff) | |
3rdparty/libgfxinit: Update submodule pointer
Changes allow to use the integrated panel logic (power sequen-
cing and backlight control) for more connectors. The Kconfigs
GFX_GMA_PANEL_1_PORT and GFX_GMA_PANEL_2_PORT can now be set
to any port, e.g.
config GFX_GMA_PANEL_1_PORT
default "DP3"
Now that the panel logic is not tied to the `Internal` port
choice anymore, we can properly split it into `LVDS` and `eDP`.
This also adds Comet Lake PCI IDs which should still work the
same as Kaby and Coffee Lake.
Change-Id: I78b1b458ca00714dcbe7753a7beb4fb05d69986b
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38921
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'Documentation/gfx')
| -rw-r--r-- | Documentation/gfx/libgfxinit.md | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/Documentation/gfx/libgfxinit.md b/Documentation/gfx/libgfxinit.md index 0608363906..bb4528b958 100644 --- a/Documentation/gfx/libgfxinit.md +++ b/Documentation/gfx/libgfxinit.md @@ -65,11 +65,20 @@ board can initialize graphics through *libgfxinit*: select MAINBOARD_HAS_LIBGFXINIT Internal ports share some hardware blocks (e.g. backlight, panel -power sequencer). Therefore, each board has to select either eDP -or LVDS as the internal port, if any: +power sequencer). Therefore, each system with an integrated panel +should set `GFX_GMA_PANEL_1_PORT` to the respective port, e.g.: - select GFX_GMA_INTERNAL_IS_EDP # the default, or - select GFX_GMA_INTERNAL_IS_LVDS + config GFX_GMA_PANEL_1_PORT + default "DP3" + +For the most common cases, LVDS and eDP, exists a shorthand, one +can select either: + + select GFX_GMA_PANEL_1_ON_EDP # the default, or + select GFX_GMA_PANEL_1_ON_LVDS + +Some newer chips feature a second block of panel control logic. +For this, `GFX_GMA_PANEL_2_PORT` can be set. Boards with a DVI-I connector share the DDC (I2C) pins for both analog and digital displays. In this case, *libgfxinit* needs to @@ -96,7 +105,8 @@ You can select from the following Ports: type Port_Type is (Disabled, -- optionally terminates the list - Internal, -- either eDP or LVDS as selected in Kconfig + LVDS, + eDP, DP1, DP2, DP3, @@ -112,8 +122,7 @@ both DPx and HDMIx should be listed. A good example is the mainboard Kontron/KTQM77, it features two DP++ ports (DP2/HDMI2, DP3/HDMI3), one DVI-I port (HDMI1/Analog), -eDP and LVDS. Due to the constraints mentioned above, only one of -eDP and LVDS can be enabled. It defines `ports` as follows: +eDP and LVDS. It defines `ports` as follows: ports : constant Port_List := (DP2, @@ -122,7 +131,8 @@ eDP and LVDS can be enabled. It defines `ports` as follows: HDMI2, HDMI3, Analog, - Internal, + LVDS, + eDP, others => Disabled); The `GMA.gfxinit()` procedure probes for display EDIDs in the |