From: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
EDID readout errors happen often, e.g. because the HDMI port doesn't
have a display connected. However, when a monitor is connected, but some
other error occurs, barebox is silent. Add a debug message with an error
code for this.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/video/edid.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/video/edid.c b/drivers/video/edid.c
index d2757185f6..2baf6646d9 100644
--- a/drivers/video/edid.c
+++ b/drivers/video/edid.c
@@ -852,20 +852,27 @@ edid_do_read_i2c(struct i2c_adapter *adapter, unsigned char *buf,
ret = i2c_transfer(adapter, &msgs[3 - xfers], xfers);
} while (ret != xfers && --retries);
- return ret == xfers ? 0 : -1;
+ if (ret == 0)
+ ret = -EPROTO;
+
+ return ret == xfers ? 0 : ret;
}
void *edid_read_i2c(struct i2c_adapter *adapter)
{
u8 *block;
+ int ret;
if (!IS_ENABLED(CONFIG_I2C))
return NULL;
block = xmalloc(EDID_LENGTH);
- if (edid_do_read_i2c(adapter, block, 0, EDID_LENGTH))
+ ret = edid_do_read_i2c(adapter, block, 0, EDID_LENGTH);
+ if (ret) {
+ dev_dbg(&adapter->dev, "EDID readout failed: %pe\n", ERR_PTR(ret));
goto out;
+ }
return block;
out:
--
2.39.2
