OMAP: DSS2: DSI: add dsi_vc_dcs_read_2() helper

Add dsi_vc_dcs_read_2() helper function to read two bytes from the DSI peripheral. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
git-mirror · Feb 25, 2010 · 53055aa · 53055aa
1 parent ddbfeb3
commit 53055aa
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diff --git a/arch/arm/plat-omap/include/plat/display.h b/arch/arm/plat-omap/include/plat/display.h
@@ -238,6 +238,7 @@ int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param);
 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len);
 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen);
 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data);
+int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u16 *data);
 int dsi_vc_set_max_rx_packet_size(int channel, u16 len);
 int dsi_vc_send_null(int channel);
 int dsi_vc_send_bta_sync(int channel);

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
@@ -2212,6 +2212,22 @@ int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
 }
 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
 
+int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u16 *data)
+{
+	int r;
+
+	r = dsi_vc_dcs_read(channel, dcs_cmd, (u8 *)data, 2);
+
+	if (r < 0)
+		return r;
+
+	if (r != 2)
+		return -EIO;
+
+	return 0;
+}
+EXPORT_SYMBOL(dsi_vc_dcs_read_2);
+
 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
 {
 	int r;