linux-kernel - [RFC PATCH] drm/panel: synaptics-r63353: Fix regulator unbalance

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Date: Mon, 24 Jun 2024 20:53:45 +0200
From: Michael Trimarchi <michael@...rulasolutions.com>
To: neil.armstrong@...aro.org
Cc: quic_jesszhan@...cinc.com,
	sam@...nborg.org,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	daniel@...ll.ch,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Michael Trimarchi <michael@...rulasolutions.com>
Subject: [RFC PATCH] drm/panel: synaptics-r63353: Fix regulator unbalance

The shutdown function can be called when the display is already
unprepared. For example during reboot this trigger a kernel
backlog. Calling the drm_panel_unprepare, allow us to avoid
to trigger the kernel warning

Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
---

It's not obviovus if shutdown can be dropped or this problem depends
on the display stack as it is implmented. More feedback is required
here

---
 drivers/gpu/drm/panel/panel-synaptics-r63353.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-synaptics-r63353.c b/drivers/gpu/drm/panel/panel-synaptics-r63353.c
index 169c629746c7..17349825543f 100644
--- a/drivers/gpu/drm/panel/panel-synaptics-r63353.c
+++ b/drivers/gpu/drm/panel/panel-synaptics-r63353.c
@@ -325,7 +325,7 @@ static void r63353_panel_shutdown(struct mipi_dsi_device *dsi)
 {
 	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
 
-	r63353_panel_unprepare(&rpanel->base);
+	drm_panel_unprepare(&rpanel->base);
 }
 
 static const struct r63353_desc sharp_ls068b3sx02_data = {
-- 
2.43.0