drm/panel: Change dlen from u16 to u8

U8_MAX payload length can meet most requirements

Change-Id: I77e5780bde72b4229ab36d961dc7498f7c78a468
Signed-off-by: WeiYong Bi <bivvy.bi@rock-chips.com>

diff --git a/Documentation/devicetree/bindings/display/panel/simple-panel.txt b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
index 346b80b649316a7d2096ae5f053e3bd801cd08fc..02adef125f1add89d50d5c873f1c2954b79a1c14 100644 (file)
--- a/Documentation/devicetree/bindings/display/panel/simple-panel.txt
+++ b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
@@ -24,13 +24,13 @@ Optional properties when compatible is a dsi devices:
 - panel-init-sequence: A byte stream formed by simple multiple dcs packets.
        byte 0: dcs data type
        byte 1: wait number of specified ms after dcs command transmitted
-       byte 2, 3: 16 bits length in network byte order
-       byte 4 and beyond: number byte of payload
+       byte 2: packet payload length
+       byte 3 and beyond: number byte of payload
 - panel-exit-sequence: A byte stream formed by simple multiple dcs packets.
        byte 0: dcs data type
        byte 1: wait number of specified ms after dcs command transmitted
-       byte 2, 3: 16 bits length in network byte order
-       byte 4 and beyond: number byte of payload
+       byte 2: packet payload length
+       byte 3 and beyond: number byte of payload
 
 Example:
 
@@ -64,16 +64,16 @@ Or:
                dsi,lanes = <4>;
 
                panel-init-sequence = [
-                       39 00 00 10 b1 6c 15 15 24 E4 11 f1 80 e4
-                                   d7 23 80 c0 d2 58
+                       39 00 10 b1 6c 15 15 24 E4 11 f1 80 e4
+                                d7 23 80 c0 d2 58
                        ...
-                       05 78 00 01 11
-                       05 00 00 01 29
+                       05 78 01 11
+                       05 00 01 29
                ];
 
                panel-exit-sequence = [
-                       05 00 00 01 28
-                       05 78 00 01 10
+                       05 00 01 28
+                       05 78 01 10
                ];
 
                display-timings {

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 25b6d9a8c971b81cf89d3a03414a726d6913b516..20a4bb6b548c2486f8d85c10d83745145f515ac0 100644 (file)
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -41,7 +41,7 @@
 struct dsi_ctrl_hdr {
        u8 dtype;       /* data type */
        u8 wait;        /* ms */
-       u16 dlen;       /* payload len */
+       u8 dlen;        /* payload len */
 } __packed;
 
 struct dsi_cmd_desc {
@@ -151,7 +151,6 @@ static int panel_simple_dsi_parse_dcs_cmds(struct device *dev,
        cnt = 0;
        while (len > sizeof(*dchdr)) {
                dchdr = (struct dsi_ctrl_hdr *)bp;
-               dchdr->dlen = ntohs(dchdr->dlen);
 
                if (dchdr->dlen > len) {
                        dev_err(dev, "%s: error, len=%d", __func__,