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.
Signed-off-by: Philippe Cornu <philippe.cornu@xxxxxx>
---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 72ecaeb40822..090bf62d1ea8 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -419,7 +419,16 @@ 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 = {
--
2.15.1
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