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authorPhilippe Cornu <philippe.cornu@st.com>2018-01-25 11:37:59 +0100
committerArchit Taneja <architt@codeaurora.org>2018-01-30 16:19:17 +0530
commit4cda6e8e1ea0e7bc80028fa4fe196357a2799d05 (patch)
treec95d1bd8c14b7d99569ad1043d31424e6a41df6d /drivers
parent21f815bf773c1f7dc278060eb49d7651c3175148 (diff)
drm/bridge/synopsys: dsi: Add a warning msg on dsi read requests
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. 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/20180125103800.1999-2-philippe.cornu@st.com
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index c83049d66baf..37d13ccad2e7 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -398,6 +398,12 @@ 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);