[PATCH] sandbox: cros_ec: Basic support for EC_CMD_GET_NEXT_EVENT

[Alper Nebi Yasak]

Since commit 690079767803 ("cros_ec: Support keyboard scanning with
EC_CMD_GET_NEXT_EVENT") the cros-ec-keyb driver has started using this
command, but the sandbox EC emulator does not recognize it and
continuously prints:

    ** Unknown EC command 0x67

This patch makes the sandbox driver send basic responses to the command,
but the response only supports keyboard scans for now.

Fixes: 690079767803 ("cros_ec: Support keyboard scanning with EC_CMD_GET_NEXT_EVENT")
Reported-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
Signed-off-by: Alper Nebi Yasak <alpernebiyasak at gmail.com>
---
This doesn't test the -EC_RES_UNAVAILABLE part, which looks like an
event queue on the EC side. As far as I understand sandbox is getting a
single keyboard state from SDL after discarding pending events. I think
things would need to be hooked into sandbox_sdl_poll_events, looks
possible but harder.

Also, now that this command would work, the fallback to the old one
would never trigger and wouldn't be tested.

 drivers/misc/cros_ec_sandbox.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/misc/cros_ec_sandbox.c b/drivers/misc/cros_ec_sandbox.c
index a191f061b898..d72db3eace98 100644
--- a/drivers/misc/cros_ec_sandbox.c
+++ b/drivers/misc/cros_ec_sandbox.c
@@ -460,6 +460,14 @@ static int process_cmd(struct ec_state *ec,
 	case EC_CMD_ENTERING_MODE:
 		len = 0;
 		break;
+	case EC_CMD_GET_NEXT_EVENT: {
+		struct ec_response_get_next_event *resp = resp_data;
+
+		resp->event_type = EC_MKBP_EVENT_KEY_MATRIX;
+		cros_ec_keyscan(ec, resp->data.key_matrix);
+		len = sizeof(*resp);
+		break;
+	}
 	default:
 		printf("   ** Unknown EC command %#02x\n", req_hdr->command);
 		return -1;
-- 
2.29.2