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drm/sun4i: sun6i_mipi_dsi: fix DCS long write packet length

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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
This commit is contained in:
Icenowy Zheng 2019-10-07 00:03:02 +08:00 committed by Maxime Ripard
parent 81fafb9488
commit 4340ec45e8
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GPG Key ID: E3EF0D6F671851C5
1 changed files with 2 additions and 2 deletions
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drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
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@ -832,8 +832,8 @@ static u32 sun6i_dsi_dcs_build_pkt_hdr(struct sun6i_dsi *dsi,
u32 pkt = msg->type; u32 pkt = msg->type;
if (msg->type == MIPI_DSI_DCS_LONG_WRITE) { if (msg->type == MIPI_DSI_DCS_LONG_WRITE) {
pkt |= ((msg->tx_len + 1) & 0xffff) << 8; pkt |= ((msg->tx_len) & 0xffff) << 8;
pkt |= (((msg->tx_len + 1) >> 8) & 0xffff) << 16; pkt |= (((msg->tx_len) >> 8) & 0xffff) << 16;
} else { } else {
pkt |= (((u8 *)msg->tx_buf)[0] << 8); pkt |= (((u8 *)msg->tx_buf)[0] << 8);
if (msg->tx_len > 1) if (msg->tx_len > 1)