drm/panel: simple: Assign data from panel_dpi_probe() correctly

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: 4a1d0db ("drm/panel: simple: add panel-dpi support")

Signed-off-by: Christoph Niedermaier <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
To: [email protected]
Reviewed-by: Sam Ravnborg <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: cniedermaier

drivers/gpu/drm/panel/panel-simple.c

@@ -588,6 +588,7 @@ 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);