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drm/bridge/synopsys: dsi: Fix dsi_host_transfer() return value

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The dw_mipi_dsi_host_transfer() must return the number of
bytes transmitted/received on success instead of 0.
Note: As the read feature is not implemented, only the
transmitted number of bytes is returned for the moment.

Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180125103800.1999-3-philippe.cornu@st.com
This commit is contained in:
Philippe Cornu 2018-01-25 11:38:00 +01:00 committed by Archit Taneja
parent 4cda6e8e1e
commit 1a1c130cca
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
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@ -412,7 +412,16 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
dw_mipi_message_config(dsi, msg);
return dw_mipi_dsi_write(dsi, &packet);
ret = dw_mipi_dsi_write(dsi, &packet);
if (ret)
return ret;
/*
* TODO Only transmitted size is returned as actual driver does
* not support dcs/generic reads. Please update return value when
* delivering the read feature.
*/
return packet.size;
}
static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {