OMAP: DSS2: DSI: add error prints
Add error printing for dsi_vc_dcs_write() and dsi_vc_dcs_read().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index a982020..3af207b 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -2081,10 +2081,16 @@
r = dsi_vc_dcs_write_nosync(channel, data, len);
if (r)
- return r;
+ goto err;
r = dsi_vc_send_bta_sync(channel);
+ if (r)
+ goto err;
+ return 0;
+err:
+ DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
+ channel, data[0], len);
return r;
}
EXPORT_SYMBOL(dsi_vc_dcs_write);
@@ -2115,16 +2121,17 @@
r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
if (r)
- return r;
+ goto err;
r = dsi_vc_send_bta_sync(channel);
if (r)
- return r;
+ goto err;
/* RX_FIFO_NOT_EMPTY */
if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
DSSERR("RX fifo empty when trying to read.\n");
- return -EIO;
+ r = -EIO;
+ goto err;
}
val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
@@ -2134,15 +2141,18 @@
if (dt == DSI_DT_RX_ACK_WITH_ERR) {
u16 err = FLD_GET(val, 23, 8);
dsi_show_rx_ack_with_err(err);
- return -EIO;
+ r = -EIO;
+ goto err;
} else if (dt == DSI_DT_RX_SHORT_READ_1) {
u8 data = FLD_GET(val, 15, 8);
if (dsi.debug_read)
DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
- if (buflen < 1)
- return -EIO;
+ if (buflen < 1) {
+ r = -EIO;
+ goto err;
+ }
buf[0] = data;
@@ -2152,8 +2162,10 @@
if (dsi.debug_read)
DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
- if (buflen < 2)
- return -EIO;
+ if (buflen < 2) {
+ r = -EIO;
+ goto err;
+ }
buf[0] = data & 0xff;
buf[1] = (data >> 8) & 0xff;
@@ -2165,8 +2177,10 @@
if (dsi.debug_read)
DSSDBG("\tDCS long response, len %d\n", len);
- if (len > buflen)
- return -EIO;
+ if (len > buflen) {
+ r = -EIO;
+ goto err;
+ }
/* two byte checksum ends the packet, not included in len */
for (w = 0; w < len + 2;) {
@@ -2188,11 +2202,18 @@
}
return len;
-
} else {
DSSERR("\tunknown datatype 0x%02x\n", dt);
- return -EIO;
+ r = -EIO;
+ goto err;
}
+
+ BUG();
+err:
+ DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
+ channel, dcs_cmd);
+ return r;
+
}
EXPORT_SYMBOL(dsi_vc_dcs_read);