The dcs/generic dsi read feature is not yet implemented so it is important to warn the host_transfer() caller in case of read operation requests.
Signed-off-by: Philippe Cornu philippe.cornu@st.com --- drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index daec7881be6d..72ecaeb40822 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -405,6 +405,12 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host, struct mipi_dsi_packet packet; int ret;
+ if (msg->rx_buf || msg->rx_len) { + /* TODO dw drv improvements: implement read feature */ + dev_warn(dsi->dev, "read operations not yet implemented\n"); + return -EINVAL; + } + ret = mipi_dsi_create_packet(&packet, msg); if (ret) { dev_err(dsi->dev, "failed to create packet: %d\n", ret);