From 812562b8d881ce6d33fed8052b3a10b718430fb5 Mon Sep 17 00:00:00 2001
From: Shuijing Li <shuijing.li@mediatek.com>
Date: Mon, 15 May 2023 17:49:55 +0800
Subject: [PATCH] drm/panel: boe-tv101wum-nl6: Fine tune the panel power sequence
Git-commit: 812562b8d881ce6d33fed8052b3a10b718430fb5
Patch-mainline: v6.5-rc1
References: git-fixes

For "boe,tv105wum-nw0" this special panel, it is stipulated in
the panel spec that MIPI needs to keep the LP11 state before
the lcm_reset pin is pulled high.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230515094955.15982-3-shuijing.li@mediatek.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -36,6 +36,7 @@ struct panel_desc {
 	const struct panel_init_cmd *init_cmds;
 	unsigned int lanes;
 	bool discharge_on_disable;
+	bool lp11_before_reset;
 };
 
 struct boe_panel {
@@ -1269,6 +1270,10 @@ static int boe_panel_prepare(struct drm_
 
 	usleep_range(10000, 11000);
 
+	if (boe->desc->lp11_before_reset) {
+		mipi_dsi_dcs_nop(boe->dsi);
+		usleep_range(1000, 2000);
+	}
 	gpiod_set_value(boe->enable_gpio, 1);
 	usleep_range(1000, 2000);
 	gpiod_set_value(boe->enable_gpio, 0);
@@ -1495,6 +1500,7 @@ static const struct panel_desc boe_tv105
 	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
 		      MIPI_DSI_MODE_LPM,
 	.init_cmds = boe_init_cmd,
+	.lp11_before_reset = true,
 };
 
 static int boe_panel_get_modes(struct drm_panel *panel,