linux-kernel - [PATCH] drm: panel: boe-bf060y8m-aj0: Enable prepare_prev

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Message-Id: <20240722-bf060y8m-aj0-prepare-prev-v1-1-0e51c0f59d22@riseup.net>
Date: Mon, 22 Jul 2024 14:07:15 +0700
From: Dang Huynh <danct12@...eup.net>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 Dang Huynh <danct12@...eup.net>
Subject: [PATCH] drm: panel: boe-bf060y8m-aj0: Enable prepare_prev_first

Enable prepare_prev_first flag for BF060Y8M-AJ0 panel so that the
previous controller should be prepared first before the prepare for
the panel is called.

This makes sure that the previous controller, likely to be a DSI host
controller should be initialized to LP-11 before the panel is powered up.

Suggested-by: Marijn Suijten <marijn.suijten@...ainline.org>
Signed-off-by: Dang Huynh <danct12@...eup.net>
---
This fixes display initialization on some platform/devices such as the
Fxtec Pro1X.
---
 drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c b/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
index e77db8597eb7..7e66db4a88bb 100644
--- a/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
+++ b/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
@@ -377,6 +377,8 @@ static int boe_bf060y8m_aj0_probe(struct mipi_dsi_device *dsi)
 	drm_panel_init(&boe->panel, dev, &boe_bf060y8m_aj0_panel_funcs,
 		       DRM_MODE_CONNECTOR_DSI);
 
+	boe->panel.prepare_prev_first = true;
+
 	boe->panel.backlight = boe_bf060y8m_aj0_create_backlight(dsi);
 	if (IS_ERR(boe->panel.backlight))
 		return dev_err_probe(dev, PTR_ERR(boe->panel.backlight),

---
base-commit: 41c196e567fb1ea97f68a2ffb7faab451cd90854
change-id: 20240722-bf060y8m-aj0-prepare-prev-2db87e7dd996

Best regards,
-- 
Dang Huynh <danct12@...eup.net>