From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 2 Dec 2021 18:13:02 +0000 (+0000)
Subject: drm/panel-simple: When using panel-dpi, update desc
X-Git-Tag: submit/tizen/20220208.074352~396
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c2a92ebcf076c94e829338a5f9110e91e7121a0b;p=platform%2Fkernel%2Flinux-rpi.git

drm/panel-simple: When using panel-dpi, update desc

When using the "panel-dpi" compatible string, desc as passed
from DT is a dumy entry, and panel_dpi_probe allocates a new
one and attaches it to the panel.
However panel_simple_probe has already taken a local copy of
the variable, which means all the validation is done against
the empty dummy structure, not the configured data.

Update the local variable after panel_dpi_probe.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index c0cd50e..81f8747 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -559,6 +559,7 @@ 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);