OMAP: DSS2: DSI: add helpers for DCS read/write

Add helper functions for most common DCS read and write operations.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index b38974523d48..e49f063fb615 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -2176,6 +2176,21 @@ int dsi_vc_dcs_write(int channel, u8 *data, int len)
 }
 EXPORT_SYMBOL(dsi_vc_dcs_write);
 
+int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
+{
+        return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
+}
+EXPORT_SYMBOL(dsi_vc_dcs_write_0);
+
+int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
+{
+        u8 buf[2];
+        buf[0] = dcs_cmd;
+        buf[1] = param;
+        return dsi_vc_dcs_write(channel, buf, 2);
+}
+EXPORT_SYMBOL(dsi_vc_dcs_write_1);
+
 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
 {
         u32 val;
@@ -2268,6 +2283,21 @@ int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
 }
 EXPORT_SYMBOL(dsi_vc_dcs_read);
 
+int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
+{
+        int r;
+
+        r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
+
+        if (r < 0)
+                return r;
+
+        if (r != 1)
+                return -EIO;
+
+        return 0;
+}
+EXPORT_SYMBOL(dsi_vc_dcs_read_1);
 
 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
 {