media: pulse8-cec: improve debugging

Add and use pulse8_msgname() to show the message codes as a
human readable text instead of a number.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/usb/pulse8-cec/pulse8-cec.c b/drivers/media/usb/pulse8-cec/pulse8-cec.c
index 5960955..ea9d42d 100644 (file)
--- a/drivers/media/usb/pulse8-cec/pulse8-cec.c
+++ b/drivers/media/usb/pulse8-cec/pulse8-cec.c
@@ -100,6 +100,61 @@ enum pulse8_msgcodes {
        MSGCODE_FRAME_ACK = 0x40,
 };
 
+static const char * const pulse8_msgnames[] = {
+       "NOTHING",
+       "PING",
+       "TIMEOUT_ERROR",
+       "HIGH_ERROR",
+       "LOW_ERROR",
+       "FRAME_START",
+       "FRAME_DATA",
+       "RECEIVE_FAILED",
+       "COMMAND_ACCEPTED",
+       "COMMAND_REJECTED",
+       "SET_ACK_MASK",
+       "TRANSMIT",
+       "TRANSMIT_EOM",
+       "TRANSMIT_IDLETIME",
+       "TRANSMIT_ACK_POLARITY",
+       "TRANSMIT_LINE_TIMEOUT",
+       "TRANSMIT_SUCCEEDED",
+       "TRANSMIT_FAILED_LINE",
+       "TRANSMIT_FAILED_ACK",
+       "TRANSMIT_FAILED_TIMEOUT_DATA",
+       "TRANSMIT_FAILED_TIMEOUT_LINE",
+       "FIRMWARE_VERSION",
+       "START_BOOTLOADER",
+       "GET_BUILDDATE",
+       "SET_CONTROLLED",
+       "GET_AUTO_ENABLED",
+       "SET_AUTO_ENABLED",
+       "GET_DEFAULT_LOGICAL_ADDRESS",
+       "SET_DEFAULT_LOGICAL_ADDRESS",
+       "GET_LOGICAL_ADDRESS_MASK",
+       "SET_LOGICAL_ADDRESS_MASK",
+       "GET_PHYSICAL_ADDRESS",
+       "SET_PHYSICAL_ADDRESS",
+       "GET_DEVICE_TYPE",
+       "SET_DEVICE_TYPE",
+       "GET_HDMI_VERSION",
+       "SET_HDMI_VERSION",
+       "GET_OSD_NAME",
+       "SET_OSD_NAME",
+       "WRITE_EEPROM",
+       "GET_ADAPTER_TYPE",
+       "SET_ACTIVE_SOURCE",
+};
+
+static const char *pulse8_msgname(u8 cmd)
+{
+       static char unknown_msg[5];
+
+       if ((cmd & 0x3f) < ARRAY_SIZE(pulse8_msgnames))
+               return pulse8_msgnames[cmd & 0x3f];
+       snprintf(unknown_msg, sizeof(unknown_msg), "0x%02x", cmd);
+       return unknown_msg;
+}
+
 #define MSGSTART       0xff
 #define MSGEND         0xfe
 #define MSGESC         0xfd
@@ -178,8 +233,8 @@ static irqreturn_t pulse8_interrupt(struct serio *serio, unsigned char data,
                u8 msgcode = pulse8->buf[0];
 
                if (debug)
-                       dev_info(pulse8->dev, "received: %*ph\n",
-                                pulse8->idx, pulse8->buf);
+                       dev_info(pulse8->dev, "received %s: %*ph\n",
+                                pulse8_msgname(msgcode), pulse8->idx, pulse8->buf);
                switch (msgcode & 0x3f) {
                case MSGCODE_FRAME_START:
                        msg->len = 1;
@@ -278,7 +333,7 @@ static int pulse8_send_and_wait_once(struct pulse8 *pulse8,
 {
        int err;
 
-       /*dev_info(pulse8->dev, "transmit: %*ph\n", cmd_len, cmd);*/
+       /* dev_info(pulse8->dev, "transmit %s: %*ph\n", pulse8_msgname(cmd[0]), cmd_len, cmd); */
        init_completion(&pulse8->cmd_done);
 
        err = pulse8_send(pulse8->serio, cmd, cmd_len);
@@ -294,8 +349,8 @@ static int pulse8_send_and_wait_once(struct pulse8 *pulse8,
                return -ENOTTY;
        if (response &&
            ((pulse8->data[0] & 0x3f) != response || pulse8->len < size + 1)) {
-               dev_info(pulse8->dev, "transmit: failed %02x\n",
-                        pulse8->data[0] & 0x3f);
+               dev_info(pulse8->dev, "transmit %s: failed %s\n",
+                        pulse8_msgname(cmd[0]), pulse8_msgname(pulse8->data[0]));
                return -EIO;
        }
        return 0;