[PATCH 6.12.y 3/3] drm/panel: ebbg-ft8719: Set prepare_prev_first

[Sasha Levin <sashal@kernel.org>]

From: Casey Connolly <casey.connolly@linaro.org>

[ Upstream commit 4eeeac9d7c3600a6cae75b2a7bc9c5b67530923c ]

This corrects the host initialisation sequence so that we can send
DSI/DCS commands in prepare().

Cc: stable@vger.kernel.org
Fixes: b00de0e237da ("drm/panel: introduce ebbg,ft8719 panel")
Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
Tested-by: Marco Mattiolo <marco.mattiolo@hotmail.it>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260908-ebbg-ft8719-fixups-v2-1-5454ae1f5581@ixit.cz
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/panel/panel-ebbg-ft8719.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-ebbg-ft8719.c b/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
index 74b56ee42fa49..c97825177693f 100644
--- a/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
+++ b/drivers/gpu/drm/panel/panel-ebbg-ft8719.c
@@ -233,6 +233,8 @@ static int ebbg_ft8719_probe(struct mipi_dsi_device *dsi)
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
 			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
 
+	ctx->panel.prepare_prev_first = true;
+
 	ret = drm_panel_of_backlight(&ctx->panel);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to get backlight\n");
-- 
2.53.0