usb_pd_policy: Make a lot of objects common

There is a board specific usb_pd_policy.c file that contains a lot of
code for handling DisplayPort Alternate mode, Google Firmware Update
Alternate mode, as well as some PD policy functions such as deciding to
Accept or Reject a data role swap or a power role swap.  Several boards
simply copy/paste this code from project to project as a lot of this
functionality is not actually board specific.

This commit tries to refactor this by pulling the functions that are not
mainly board specific into common code.  The functions are made
overridable such that boards that truly do require a different
implementation may do so.

Additionally, this consolidation changes the policy behaviour for some
boards, but they should be for the better.  Some examples include that
data swaps are always allowed if we are a UFP (no system image
requirement), power swaps are allowed to become a sink if we are no
longer dual role (e.g. - in suspend), and DisplayPort Alternate Mode is
not entered if the AP is off.

In order to facilitate this refactor, a couple CONFIG_* options were
introduced:

- CONFIG_USB_PD_DP_HPD_GPIO
/* HPD is sent to the GPU from the EC via a GPIO */

- CONFIG_USB_PD_CUSTOM_VDO
/*
 * Define this if a board needs custom SNK and/or SRC PDOs.
 *
 * The default SRC PDO is a fixed 5V/1.5A with PDO_FIXED_FLAGS indicating
 * Dual-Role power, USB Communication Capable, and Dual-Role data.
 *
 * The default SNK PDOs are:
 * - Fixed 5V/500mA with the same PDO_FIXED_FLAGS
 * - Variable (non-battery) min 4.75V, max PD_MAX_VOLTAGE_MV,
 *   operational current PD_MAX_CURRENT_MA,
 * - Battery min 4.75V, max PD_MAX_VOLTAGE_MV, operational power
 *   PD_OPERATING_POWER_MW
 */

BUG=chromium:1021724,b:141458448
BRANCH=firmware-grunt-11031.B
TEST=With other PD Policies patches, flash grunt and run faft_ec&pd

Change-Id: I18fd7e22dc77fe1dc6c21c38cd7f1bc53cae86cb
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1949052
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Diana Z <dzigterman@chromium.org>
Reviewed-by: Denis Brockus <dbrockus@chromium.org>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2213574
Tested-by: Dawid Niedźwiecki <dn@semihalf.com>
Reviewed-by: Edward Hill <ecgh@chromium.org>
Commit-Queue: Denis Brockus <dbrockus@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/board/glados/board.h b/board/glados/board.h
index 263f3e289a..4a408de37d 100644
--- a/board/glados/board.h
+++ b/board/glados/board.h
@@ -72,6 +72,7 @@
 #define CONFIG_USB_POWER_DELIVERY
 #define CONFIG_USB_PD_ALT_MODE
 #define CONFIG_USB_PD_ALT_MODE_DFP
+#define CONFIG_USB_PD_DP_HPD_GPIO
 #define CONFIG_USB_PD_DUAL_ROLE
 #define CONFIG_USB_PD_LOGGING
 #define CONFIG_USB_PD_PORT_COUNT 2