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| author | Matt DeVillier <matt.devillier@gmail.com> | 2020-03-18 23:45:32 -0500 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-20 09:38:39 +0000 |
| commit | 70ea3b9141ee92177c1a1185a7e6a468fd59bc85 (patch) | |
| tree | 1d8e4606a8b8a77b01615342e8e863b19b722833 /src | |
| parent | 78b43c8990a7e3331dd5a0bd2484a53956f546aa (diff) | |
| download | coreboot-70ea3b9141ee92177c1a1185a7e6a468fd59bc85.tar.xz | |
ec/google/chromeec: don't put empty block in SSDT
Check that there are actually USB-PD ports for which to
add data to SSDT, before actually generating SSDT data.
This prevents an empty scope from being generated on
devices without any USB-PD ports, which was breaking
parsing/decompilation on some older platforms (eg,
Braswell).
Test: build/boot google/edgar, verify SSDT table able to
be parsed via iasl after dumping.
Change-Id: Ia213e5815e9160e9b36b2501eeccb6385abef47e
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39665
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/ec/google/chromeec/ec_acpi.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/src/ec/google/chromeec/ec_acpi.c b/src/ec/google/chromeec/ec_acpi.c index 4dfd44bf4e..47d60d5b75 100644 --- a/src/ec/google/chromeec/ec_acpi.c +++ b/src/ec/google/chromeec/ec_acpi.c @@ -177,19 +177,14 @@ static void add_usb_port_references(struct acpi_dp *dsd, int port_number) } } -static void fill_ssdt_typec_device(struct device *dev) +static void fill_ssdt_typec_device(int num_ports) { struct usb_pd_port_caps port_caps; char con_name[] = "CONx"; struct acpi_dp *dsd; - int num_ports; int rv; int i; - rv = google_chromeec_get_num_pd_ports(&num_ports); - if (rv) - return; - acpigen_write_device(GOOGLE_CHROMEEC_USBC_DEVICE_NAME); acpigen_write_name_string("_HID", GOOGLE_CHROMEEC_USBC_DEVICE_HID); acpigen_write_name_string("_DDN", "ChromeOS EC Embedded Controller " @@ -220,8 +215,12 @@ static void fill_ssdt_typec_device(struct device *dev) void google_chromeec_fill_ssdt_generator(struct device *dev) { + int num_ports; + if (google_chromeec_get_num_pd_ports(&num_ports)) + return; + /* Reference the existing device's scope */ acpigen_write_scope(acpi_device_path(dev)); - fill_ssdt_typec_device(dev); + fill_ssdt_typec_device(num_ports); acpigen_pop_len(); /* Scope */ } |