drivers/gfx/generic: Add _PLD support to GFX device
Add _PLD support to GFX device so that each display output can store
its physical location of connection point. This is to be used primarily
for describing DP on USB-C ports in the future patches.
The upstream Linux kernel now has a feature to compare _PLD of Type C
connectors and DP connectors to link them together.
https://cgit.freedesktop.org/drm/drm-misc/commit/?id=c5c51b2420625faa1f0e363f21dba1de53806ff7
This feature allows us to tell which display output is used by which
USB-C port.
So, for the future boards, we want to add _PLD for each DP connector
matching with the corresponding USB-C port.
BUG=b:277629750
TEST=emerge-${BOARD} coreboot
Signed-off-by: Won Chung <wonchung@google.com>
Change-Id: I393207746a9e82c1fd7622ab3661d7b1232cb62f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74365
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
diff --git a/src/drivers/gfx/generic/generic.c b/src/drivers/gfx/generic/generic.c
index 7c6076c..0ab1676 100644
--- a/src/drivers/gfx/generic/generic.c
+++ b/src/drivers/gfx/generic/generic.c
@@ -128,6 +128,10 @@
acpigen_write_name_integer("_STA", 0xF);
gfx_fill_privacy_screen_dsm(&config->device[i].privacy);
+
+ if (config->device[i].use_pld)
+ acpigen_write_pld(&config->device[i].pld);
+
acpigen_pop_len(); /* Device */
}
acpigen_pop_len(); /* Scope */