TCPMv2: DPM: Add support for sending SVDM Attention message

This CL adds a new DPM function to generate a request to the PE to
send a SVDM Attention message via the DPM. This change deprecates
pd_send_hpd from TCPMv2, which existed for the same
purpose. pd_send_hpd is now part of the hpd->DP Attention converter.

This path replaces the need to use pd_send_vdm which can't be reliably
used with its current design.

BUG=b:175660576,b:180465870
BRANCH=None
TEST=Verified on quiche that can enter ALT-DP mode as a UFP-D and that
display is extended properly via display port or hdmi connector.

Signed-off-by: Scott Collyer <scollyer@google.com>
Change-Id: I9f8817cb8d40f32b878abdc09db605097a32548b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2691969
Tested-by: Keith Short <keithshort@chromium.org>
Tested-by: Scott Collyer <scollyer@chromium.org>
Reviewed-by: Diana Z <dzigterman@chromium.org>
Commit-Queue: Scott Collyer <scollyer@chromium.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/include/usb_pd.h b/include/usb_pd.h
index 852dcf35a9..38f187660c 100644
--- a/include/usb_pd.h
+++ b/include/usb_pd.h
@@ -2074,6 +2074,23 @@ struct partner_active_modes *pd_get_partner_active_modes(int port,
 		enum tcpm_transmit_type type);
 
 /*
+ * Sets the current object position for DP alt-mode
+ * Note: opos == 0 means the mode is not active
+ *
+ * @param port USB-C port number
+ * @param opos Object position for DP alternate mode
+ */
+void pd_ufp_set_dp_opos(int port, int opos);
+
+/*
+ * Gets the current object position for DP alt-mode
+ *
+ * @param port USB-C port number
+ * @return Alt-DP object position value for the given port
+ */
+int pd_ufp_get_dp_opos(int port);
+
+/*
  * Returns True if cable supports USB2 connection
  *
  * @param port  USB-C port number
@@ -2684,6 +2701,20 @@ void pd_notify_event(int port, uint32_t event_mask);
 void pd_clear_events(int port, uint32_t clear_mask);
 
 /*
+ * Requests a VDM Attention message be sent. Attention is the only SVDM message
+ * that does not result in a response from the port partner. In addition, if
+ * it's a DP Attention message, then it will be requested from outside of the
+ * port's PD task.
+ *
+ * @param port USB-C port number
+ * @param *data pointer to the VDM Attention message
+ * @param vdo_count number of VDOs (must be 1 or 2)
+ * @return EC_RES_SUCCESS if a VDM message is scheduled.
+ */
+enum ec_status pd_request_vdm_attention(int port, const uint32_t *data,
+				       int vdo_count);
+
+/*
  * Requests that the port enter the specified mode. A successful result just
  * means that the request was received, not that the mode has been entered yet.
  *