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author | Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-02-26 11:32:56 +0200 |
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committer | Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-02-26 17:44:10 +0200 |
commit | 5d68e0326b146f28fbb8fe6375dd7d15ca929be7 (patch) | |
tree | 4190a41f4306e17bdbc1ff8146ad323f25b43265 /drivers | |
parent | 606847540079bd3e710f132724145c5785396dcb (diff) | |
download | kernel_samsung_smdk4412-5d68e0326b146f28fbb8fe6375dd7d15ca929be7.zip kernel_samsung_smdk4412-5d68e0326b146f28fbb8fe6375dd7d15ca929be7.tar.gz kernel_samsung_smdk4412-5d68e0326b146f28fbb8fe6375dd7d15ca929be7.tar.bz2 |
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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/video/omap2/dss/dsi.c | 47 |
1 files changed, 34 insertions, 13 deletions
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 @@ int dsi_vc_dcs_write(int channel, u8 *data, int len) 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 @@ int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen) 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 @@ int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen) 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 @@ int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen) 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 @@ int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen) 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 @@ int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen) } 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); |