From:   Prashant Malani <pmalani@chromium.org>
To:     linux-kernel@vger.kernel.org, chrome-platform@lists.linux.dev
Cc:     bleung@chromium.org, heikki.krogerus@linux.intel.com,
        Prashant Malani <pmalani@chromium.org>,
        Daisuke Nojiri <dnojiri@chromium.org>,
        "Dustin L. Howett" <dustin@howett.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Guenter Roeck <groeck@chromium.org>,
        "Gustavo A. R. Silva" <gustavoars@kernel.org>,
        Lee Jones <lee@kernel.org>,
        Tinghan Shen <tinghan.shen@mediatek.com>,
        Tzung-Bi Shih <tzungbi@kernel.org>
Subject: [PATCH 1/2] platform/chrome: cros_ec: Add VDM attention headers
Date:   Thu, 26 Jan 2023 20:55:45 +0000
Message-Id: <20230126205620.3714994-1-pmalani@chromium.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Incorporate updates to the EC headers to support the retrieval of VDM
Attention messages from port partners. These headers are already present
in the ChromeOS EC codebase. [1]

[1] https://source.chromium.org/chromium/chromiumos/platform/ec/+/main:include/ec_commands.h

Signed-off-by: Prashant Malani <pmalani@chromium.org>
---
 include/linux/platform_data/cros_ec_commands.h | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index b9c4a3964247..ec327638c6eb 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -5862,6 +5862,7 @@ enum tcpc_cc_polarity {
 #define PD_STATUS_EVENT_MUX_1_SET_DONE		BIT(5)
 #define PD_STATUS_EVENT_VDM_REQ_REPLY		BIT(6)
 #define PD_STATUS_EVENT_VDM_REQ_FAILED		BIT(7)
+#define PD_STATUS_EVENT_VDM_ATTENTION			BIT(8)
 
 struct ec_params_typec_status {
 	uint8_t port;
@@ -5906,7 +5907,8 @@ struct ec_response_typec_status {
 } __ec_align1;
 
 /*
- * Gather the response to the most recent VDM REQ from the AP
+ * Gather the response to the most recent VDM REQ from the AP, as well
+ * as popping the oldest VDM:Attention from the DPM queue
  */
 #define EC_CMD_TYPEC_VDM_RESPONSE 0x013C
 
@@ -5919,10 +5921,18 @@ struct ec_response_typec_vdm_response {
 	uint8_t vdm_data_objects;
 	/* Partner to address - see enum typec_partner_type */
 	uint8_t partner_type;
-	/* Reserved */
-	uint16_t reserved;
+	/* enum ec_status describing VDM response */
+	uint16_t vdm_response_err;
 	/* VDM data, including VDM header */
 	uint32_t vdm_response[VDO_MAX_SIZE];
+	/* Number of 32-bit Attention fields filled in */
+	uint8_t vdm_attention_objects;
+	/* Number of remaining messages to consume */
+	uint8_t vdm_attention_left;
+	/* Reserved */
+	uint16_t reserved1;
+	/* VDM:Attention contents */
+	uint32_t vdm_attention[2];
 } __ec_align1;
 
 #undef VDO_MAX_SIZE
-- 
2.39.1.456.gfc5497dd1b-goog