TCPMv2: Separate DPM and DP from PE

Create separate modules representing DisplayPort (which decides whether
and how we can set up the DP alt mode) and the Device Policy Manager
(which decides whether we should). The end goal is to have essentially
all code with DP-specific decisions or information in the DP module and
all code with DPM-specific decisions or information in the DPM module.
This will allow the PE to map as directly as practical to its behaviors
defined in the PD spec.

Essentially detach PE_DO_PORT_DISCOVERY from the rest of the PE state
machine in preparation for deleting it.

This change paves the way for
1) Allowing the AP to drive mode entry and
2) Allowing new alt modes to be supported via largely self-contained
   modules.

BUG=b:155890173
TEST=Attach DP dongle; observe discovery and DP setup via Twinkie
BRANCH=none

Change-Id: Ie63a2e62d1ac6178722477dc53244898a04ef92f
Signed-off-by: Abe Levkoy <alevkoy@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2203842
Reviewed-by: Diana Z <dzigterman@chromium.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/test/fake_usbc.c b/test/fake_usbc.c
index 44cb3a57bb..9ff173c0af 100644
--- a/test/fake_usbc.c
+++ b/test/fake_usbc.c
@@ -235,3 +235,37 @@ const char *pd_get_task_state_name(int port)
 	return NULL;
 }
 #endif /* CONFIG_USB_DRP_ACC_TRYSRC */
+
+void dp_init(int port)
+{
+}
+
+void dp_vdm_acked(int port, int cmd)
+{
+}
+
+void dp_reset_next_command(int port)
+{
+}
+
+void dpm_init(int port)
+{
+}
+
+void dpm_vdm_acked(int port, enum tcpm_transmit_type type, int vdo_count,
+		uint32_t *vdm)
+{
+}
+
+void dpm_vdm_naked(int port, enum tcpm_transmit_type type, uint16_t svid,
+		uint8_t vdm_cmd)
+{
+}
+
+void dpm_set_mode_entry_done(int port)
+{
+}
+
+void dpm_attempt_mode_entry(int port)
+{
+}