diff options
| author | Matt DeVillier <matt.devillier@gmail.com> | 2024-01-16 18:44:27 -0600 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2024-02-14 22:05:57 +0000 |
| commit | 2981e7999e0bf2203c31701c4df5cd3164fa6d65 (patch) | |
| tree | 9428b5eb70e4346b1f8e81b120ddd7613792580b /src/drivers/gfx/generic/generic.c | |
| parent | 8f47aa8c937693e9b3fe3d4a6b34cfc80734af16 (diff) | |
drv/gfx/generic: Add Intel ACPI Backlight funcs for LCD devices
Normally this would be done by the Intel GMA driver, but we can't have
two copies of the _DOD method, so generate the LCD backlight controls
here to allow use of this driver instead of the default GMA panel
definition.
TEST=build/boot Win11 on google/byra (redrix), ensure ACPI brightness
controls functional.
Change-Id: Ic8fbaf7550405f8c6f36012c8efadb8c36b968c2
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80061
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/drivers/gfx/generic/generic.c')
| -rw-r--r-- | src/drivers/gfx/generic/generic.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/drivers/gfx/generic/generic.c b/src/drivers/gfx/generic/generic.c index cd323142da..0714565b2d 100644 --- a/src/drivers/gfx/generic/generic.c +++ b/src/drivers/gfx/generic/generic.c @@ -140,6 +140,42 @@ static void gfx_fill_ssdt_generator(const struct device *dev) if (config->device[i].use_pld) acpigen_write_pld(&config->device[i].pld); + /* Generate ACPI brightness controls for LCD on Intel iGPU */ + if (CONFIG(INTEL_GMA_ACPI) && strcmp(config->device[i].name, "LCD0") == 0) { + /* + Method (_BCL, 0, NotSerialized) + { + Return (^^XBCL()) + } + */ + acpigen_write_method("_BCL", 0); + acpigen_emit_byte(RETURN_OP); + acpigen_emit_namestring("^^XBCL"); + acpigen_pop_len(); + + /* + Method (_BCM, 1, NotSerialized) + { + ^^XBCM(Arg0) + } + */ + acpigen_write_method("_BCM", 1); + acpigen_emit_namestring("^^XBCM"); + acpigen_emit_byte(ARG0_OP); + acpigen_pop_len(); + + /* + Method (_BQC, 0, NotSerialized) + { + Return (^^XBQC()) + } + */ + acpigen_write_method("_BQC", 0); + acpigen_emit_byte(RETURN_OP); + acpigen_emit_namestring("^^XBQC"); + acpigen_pop_len(); + } + acpigen_pop_len(); /* Device */ } acpigen_pop_len(); /* Scope */ |