TCPMv2: Source out 3.0 A to non-PD ports

When no PD sinks require 3.0 A and no FRS ports require it, offer this
current level to non-PD sinking devices.  The non-PD devices will be
downgraded whenever a higher-priority type of port is connected.

BRANCH=None
BUG=b:141690755
TEST=on madoo, verify:
- plugging in a flash drive, it is offered 3.0 A
- plugging in a 3.0 A PD sink, flash drive CC resistor is downgraded
- unplugging 3.0 A PD sink, flash drive CC resistor is back to 3.0 A
- connect power to 3.0 A PD sink, flash drive CC resistor is back to
3.0 A
With FRS config check commented out, verify:
- flash drive is downgraded and FRS enabled on powered hub plug in
- flash drive is back to 3.0 A on FRS hub detach

Signed-off-by: Diana Z <dzigterman@chromium.org>
Change-Id: Iaa5c3f0a6a4f41db83978bb1e1d0b54f2519abb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2692030
Reviewed-by: Keith Short <keithshort@chromium.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/test/fake_usbc.c b/test/fake_usbc.c
index 9eb913ea19..b744007a66 100644
--- a/test/fake_usbc.c
+++ b/test/fake_usbc.c
@@ -279,6 +279,10 @@ void dpm_evaluate_sink_fixed_pdo(int port, uint32_t vsafe5v_pdo)
 {
 }
 
+void dpm_add_non_pd_sink(int port)
+{
+}
+
 void dpm_remove_sink(int port)
 {
 }