[PATCH v3 2/2] drm/panel: boe-tv101wum-nl6: Fine tune the panel power sequence

[xinlei.lee]

From: Xinlei Lee <xinlei....@mediatek.com>

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: Xinlei Lee <xinlei....@mediatek.com>
---
 drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c 
b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
index f0093035f1ff..67df61de64ae 100644
--- 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 {
@@ -1261,6 +1262,10 @@ static int boe_panel_prepare(struct drm_panel *panel)
 
        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);
@@ -1487,6 +1492,7 @@ static const struct panel_desc boe_tv105wum_nw0_desc = {
        .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,
-- 
2.18.0