linux-kernel - [PATCH 5.15 105/172] drm/panel: simple: Assign data from panel_dpi

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Date:   Mon, 14 Feb 2022 10:26:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christoph Niedermaier <cniedermaier@...electronics.com>,
        Marek Vasut <marex@...x.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 105/172] drm/panel: simple: Assign data from panel_dpi_probe() correctly

From: Christoph Niedermaier <cniedermaier@...electronics.com>

[ Upstream commit 6df4432a5eca101b5fd80fbee41d309f3d67928d ]

In the function panel_simple_probe() the pointer panel->desc is
assigned to the passed pointer desc. If function panel_dpi_probe()
is called panel->desc will be updated, but further on only desc
will be evaluated. So update the desc pointer to be able to use
the data from the function panel_dpi_probe().

Fixes: 4a1d0dbc8332 ("drm/panel: simple: add panel-dpi support")

Signed-off-by: Christoph Niedermaier <cniedermaier@...electronics.com>
Cc: Marek Vasut <marex@...x.de>
Cc: Thierry Reding <thierry.reding@...il.com>
Cc: Sam Ravnborg <sam@...nborg.org>
Cc: David Airlie <airlied@...ux.ie>
Cc: Daniel Vetter <daniel@...ll.ch>
To: dri-devel@...ts.freedesktop.org
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Marek Vasut <marex@...x.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220201110153.3479-1-cniedermaier@dh-electronics.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/panel/panel-simple.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 9b6c4e6c38a1b..b7b654f2dfd90 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -721,6 +721,7 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc,
 		err = panel_dpi_probe(dev, panel);
 		if (err)
 			goto free_ddc;
+		desc = panel->desc;
 	} else {
 		if (!of_get_display_timing(dev->of_node, "panel-timing", &dt))
 			panel_simple_parse_panel_timing_node(dev, panel, &dt);
-- 
2.34.1