This is a note to let you know that I've just added the patch titled
drm/panel: novatek-nt35950: Only unregister DSI1 if it exists
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-panel-novatek-nt35950-only-unregister-dsi1-if-it.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9e6e16834fec4f8a7dae45f6410a9ce92427d6f2
Author: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Date: Mon Apr 17 17:41:08 2023 +0200
drm/panel: novatek-nt35950: Only unregister DSI1 if it exists
[ Upstream commit a50be876f4fe2349dc8b056a49d87f69c944570f ]
Commit 5dd45b66742a ("drm/panel: novatek-nt35950: Improve error handling")
introduced logic to unregister DSI1 on any sort of probe failure, as
that's not done automatically by kernel APIs.
It did not however account for cases where only one DSI host is used.
Fix that.
Fixes: 5dd45b66742a ("drm/panel: novatek-nt35950: Improve error handling")
Reported-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230417-topic-maple_panel_fixup-v1-1-07c8db606f5e@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
index 7498fc6258bb0..8b108ac80b556 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
@@ -586,7 +586,8 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
ret = drm_panel_of_backlight(&nt->panel);
if (ret) {
- mipi_dsi_device_unregister(nt->dsi[1]);
+ if (num_dsis == 2)
+ mipi_dsi_device_unregister(nt->dsi[1]);
return dev_err_probe(dev, ret, "Failed to get backlight\n");
}
@@ -606,7 +607,8 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
ret = mipi_dsi_attach(nt->dsi[i]);
if (ret < 0) {
/* If we fail to attach to either host, we're done */
- mipi_dsi_device_unregister(nt->dsi[1]);
+ if (num_dsis == 2)
+ mipi_dsi_device_unregister(nt->dsi[1]);
return dev_err_probe(dev, ret,
"Cannot attach to DSI%d host.\n", i);
