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drm/sun4i: sun6i_mipi_dsi: fix DCS long write packet length
author
Icenowy Zheng
<icenowy@aosc.io>
Sun, 6 Oct 2019 16:03:02 +0000
(
00:03
+0800)
committer
Maxime Ripard
<mripard@kernel.org>
Mon, 7 Oct 2019 12:01:25 +0000
(14:01 +0200)
The packet length of DCS long write packet should not be added with 1
when constructing long write packet.
Fix this.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link:
https://patchwork.freedesktop.org/patch/msgid/20191006160303.24413-4-icenowy@aosc.io
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
patch
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diff --git
a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index
5acdddf
..
000c4a5
100644
(file)
--- a/
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@
-832,8
+832,8
@@
static u32 sun6i_dsi_dcs_build_pkt_hdr(struct sun6i_dsi *dsi,
u32 pkt = msg->type;
if (msg->type == MIPI_DSI_DCS_LONG_WRITE) {
- pkt |= ((msg->tx_len
+ 1
) & 0xffff) << 8;
- pkt |= (((msg->tx_len
+ 1
) >> 8) & 0xffff) << 16;
+ pkt |= ((msg->tx_len) & 0xffff) << 8;
+ pkt |= (((msg->tx_len) >> 8) & 0xffff) << 16;
} else {
pkt |= (((u8 *)msg->tx_buf)[0] << 8);
if (msg->tx_len > 1)